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In the metal finishing field

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PATENTS GRANTED In the Metal Finishing Field Printed copies of patents are furnished by the Patent and Trademark Office for $3.00 each. Address orders to: Commissioner of Patents and Trademarks, Washington, D.C. 2023 I. Chrome Plating Process u.s. Patent 5,401,379. Mar. 28, 1995 J.L Mazzochi, Chicago A plating process comprising cleaning and acid treating a metal article; electro- plating the acid-treated metal article in an electroplating solution; spray rinsing the plated article with water over a rinse tank to provide a rinsed plated article; collecting spray rinse water and heating to a temper- ature sufficient to cause evaporation and concentration of the collected rinse water; transferring the collected and concentrated spray rinse water to the electroplating so- lution; immersing the rinsed plated article in a metal plating solution; electroplating the immersed plated article; removing a plated article from the plating solution; spray rinsing the plated article with water over a second rinse tank to provide a com- pleted plated article; and transferring at least a portion of the spray rinse water collected in the second rinse tank from said second rinse tank to said plating solution. Phosphating Process u.s. Patent 5,401,381. Mar. 28, 1995 R. Seidel et al., assignors to Henkel KG, Dusseldorf, Germany A process for phosphating metal sur- faces selected from the group consisting of iron, steel, zinc, zinc alloy, aluminum, and aluminum alloy surfaces by the dip or spray-dip treatment thereof with acidic aqueous solutions comprising: 0. I to 5 g/L zinc, 5 to 50 g/L phosphate, 0.1 to 50 g/L nitrate, and 0.1 to 5 g/L nickel or said acidic solutions having pH values from 1.5 to 4.5 and temperatures from 10 to 80"C and remaining in contact with the metal surfaces for a treatment time from 1 to 300 sec, the metal surfaces being cathodically treated during phosphating with a direct current having a density in the range from 0.01 to 100 mA/cm. Anodizing Process u.s. Patent 5,401,382. Mar. 28, 1995 Ko Katsuma, assignor to Usui Kokusai Sangyo KK Ltd., Shizuoka, Japan A method for forming a tough, electrical insulating layer on a surface of a copper or a copper-based alloy, comprising anodizing in an alkaline electrolyte bath of a caustic METAL FINISHING - NOVEMBER 1995 alkali to form a thin film layer of cupric oxide on the surface of the copper article; and anodizing the surface of the copper article, which has been anodized in an acidic electrolytic bath of a hexacyanoiron complex. Waterborne Coating Composition u.s. Patent 5,401,790. Mar. 28, 1995 J.E. Poo/e and R.L Martin, assignors to PPG Industries Inc., Pittsburgh A waterborne coating composition with improved smoothness comprising a poly- meric film-forming resin in aqueous me- dium and 0.1 to 5% of an oligomeric ma- terial containing from two to four urethane, urea, or amide moieties per molecule, and two or more moieties selected from the group consisting of hydroxyl and tertiary amine. Apparatus for Nickel Electroplating u.s. Patent 5,403,460. Apr. 4, 1995 B. Sala et al., assignors to Framatome, Courbevoie and LR.S.LD. SNC, Puteaux, both of France Nickel electroplating apparatus compris- ing a tank receiving a nickel sulfamate plating bath, an anode and a cathode im- mersed in the bath, and a semipermeable wall of chemically inert sintered material separating the cathode compartment from the anode compartment in the bath, wherein the semipermeable wall of inert sintered material prevents oxygen-contain- ing compounds from passing from the an- ode compartment to the cathode compart- ment. Electroformed Copper Foil U.S. Patent 5,403,465. Apr. 4, 1995 R.D. Apperson et al., assignors to Gould Inc., Eastlake, Ohio A process for making a copper foil com- prising preparing an electrolyte solution comprising copper ions, sulfate ions, chlo- ride ions at a concentration of 1.4 to 3.9 ppm, 0.6 to 20 ppm of animal glue, and an impurity at a concentration of 0.01 to 20 g/L; flowing the electrolyte solution be- tween an anode and a rotating cathode, applying an effective amount of voltage to provide an electric current between anode and cathode having a current density in the range of 0.5 to 1.8 A/cm, the ratio of the current density to the diffusion limited cur- rent density being 0.4 or less, and deposit- ing copper on the cathode; and continu- ously removing deposited copper from the cathode as a thin web of copper foil; wherein the copper foil has a matte-side raw foil roughness of 4 to l0 microns, an ultimate tensile strength at 23"C in the range of 65,000 to 80,000 psi, an elonga- tion measured at 23"C of 6 to 25%, an ultimate tensile strength measured at 180"C in the range of 30,000 to 40,000 psi, an elongation measured at 180"C of 4 to 15%, and a thermal stability less than about 20%. Silver Plating Process u.s. Patent 5,403,466. Apr. 4, 1995 D.tN. West and H.T. Kelleher, assignors to Texas Instruments Inc., Dallas A method of manufacturing a lead frame having a plating of an electrically conduc- tive material at selected locations thereon, comprising providing a sheet of lead frame material; patterning a layer of resist on a surface of the sheet to expose selected re- gions; plating the surface with an electri- cally conductive material; patterning a layer of a second resist on the plated sur- face, which defines an unexposed lead frame pattern; and etching to remove ma- terial from regions uncovered by the sec- ond resist layer. Electroless Deposition Process U.S. Patent 5,403,625. Apr. 4, 1995 P.E.J. Legierse et aL, assignors to U.S. Philips & Du Pont Optical Co., New York A method for electroless deposition of a metal layer from a metallization liquid on a flat side of an article to be metallized more in particular a master disk, characterized in that the side to be metallized is hydrophilic, the article is positioned with the hydro- philic side directed upwardly in an at least substantially horizontal position, the hy- drophilic side is made catalytic for electro- less deposition, the article is supported so as to be rotatable, a quantity of metalliza- tion liquid is deposited on the hydrophilic side of the article in a manner such that during deposition the metallization liquid assumes the shape of a layer of substan- 111
Transcript
Page 1: In the metal finishing field

PATENTS GRANTED In the Metal Finishing Field Printed copies of patents are furnished by the Patent and Trademark Office for $3.00 each. Address orders to: Commissioner of Patents and Trademarks, Washington, D.C. 2023 I.

Chrome Plating Process u.s. Patent 5,401,379. Mar. 28, 1995 J.L Mazzochi, Chicago

A plating process comprising cleaning and acid treating a metal article; electro- plating the acid-treated metal article in an electroplating solution; spray rinsing the plated article with water over a rinse tank to provide a rinsed plated article; collecting spray rinse water and heating to a temper- ature sufficient to cause evaporation and concentration of the collected rinse water; transferring the collected and concentrated spray rinse water to the electroplating so- lution; immersing the rinsed plated article in a metal plating solution; electroplating the immersed plated article; removing a plated article from the plating solution; spray rinsing the plated article with water over a second rinse tank to provide a com- pleted plated article; and transferring at least a portion of the spray rinse water collected in the second rinse tank from said second rinse tank to said plating solution.

Phosphating Process u.s. Patent 5,401,381. Mar. 28, 1995 R. Seidel et al., assignors to Henkel KG, Dusseldorf, Germany

A process for phosphating metal sur- faces selected from the group consisting of iron, steel, zinc, zinc alloy, aluminum, and aluminum alloy surfaces by the dip or spray-dip treatment thereof with acidic aqueous solutions comprising: 0. I to 5 g/L zinc, 5 to 50 g/L phosphate, 0.1 to 50 g/L nitrate, and 0.1 to 5 g/L nickel or said acidic solutions having pH values from 1.5 to 4.5 and temperatures from 10 to 80"C and remaining in contact with the metal surfaces for a treatment time from 1 to 300 sec, the metal surfaces being cathodically treated during phosphating with a direct current having a density in the range from 0.01 to 100 mA/cm.

Anodizing Process u.s. Patent 5,401,382. Mar. 28, 1995 Ko Katsuma, assignor to Usui Kokusai Sangyo KK Ltd., Shizuoka, Japan

A method for forming a tough, electrical insulating layer on a surface of a copper or a copper-based alloy, comprising anodizing in an alkaline electrolyte bath of a caustic

METAL FINISHING - NOVEMBER 1995

alkali to form a thin film layer of cupric oxide on the surface of the copper article; and anodizing the surface of the copper article, which has been anodized in an acidic electrolytic bath of a hexacyanoiron complex.

Waterborne Coating Composition u.s. Patent 5,401,790. Mar. 28, 1995 J.E. Poo/e and R.L Martin, assignors to PPG Industries Inc., Pittsburgh

A waterborne coating composition with improved smoothness comprising a poly- meric film-forming resin in aqueous me- dium and 0.1 to 5% of an oligomeric ma- terial containing from two to four urethane, urea, or amide moieties per molecule, and two or more moieties selected from the group consisting of hydroxyl and tertiary amine.

Apparatus for Nickel Electroplating u.s. Patent 5,403,460. Apr. 4, 1995 B. Sala et al., assignors to Framatome, Courbevoie and LR.S.LD. SNC, Puteaux, both of France

Nickel electroplating apparatus compris- ing a tank receiving a nickel sulfamate plating bath, an anode and a cathode im- mersed in the bath, and a semipermeable wall of chemically inert sintered material separating the cathode compartment from the anode compartment in the bath, wherein the semipermeable wall of inert sintered material prevents oxygen-contain- ing compounds from passing from the an- ode compartment to the cathode compart- ment.

Electroformed Copper Foil U.S. Patent 5,403,465. Apr. 4, 1995 R.D. Apperson et al., assignors to Gould Inc., Eastlake, Ohio

A process for making a copper foil com- prising preparing an electrolyte solution comprising copper ions, sulfate ions, chlo- ride ions at a concentration of 1.4 to 3.9 ppm, 0.6 to 20 ppm of animal glue, and an impurity at a concentration of 0.01 to 20 g/L; flowing the electrolyte solution be- tween an anode and a rotating cathode, applying an effective amount of voltage to

provide an electric current between anode and cathode having a current density in the range of 0.5 to 1.8 A/cm, the ratio of the current density to the diffusion limited cur- rent density being 0.4 or less, and deposit- ing copper on the cathode; and continu- ously removing deposited copper from the cathode as a thin web of copper foil; wherein the copper foil has a matte-side raw foil roughness of 4 to l0 microns, an ultimate tensile strength at 23"C in the range of 65,000 to 80,000 psi, an elonga- tion measured at 23"C of 6 to 25%, an ultimate tensile strength measured at 180"C in the range of 30,000 to 40,000 psi, an elongation measured at 180"C of 4 to 15%, and a thermal stability less than about 20%.

Silver Plating Process u.s. Patent 5,403,466. Apr. 4, 1995 D.tN. West and H.T. Kelleher, assignors to Texas Instruments Inc., Dallas

A method of manufacturing a lead frame having a plating of an electrically conduc- tive material at selected locations thereon, comprising providing a sheet of lead frame material; patterning a layer of resist on a surface of the sheet to expose selected re- gions; plating the surface with an electri- cally conductive material; patterning a layer of a second resist on the plated sur- face, which defines an unexposed lead frame pattern; and etching to remove ma- terial from regions uncovered by the sec- ond resist layer.

Electroless Deposition Process U.S. Patent 5,403,625. Apr. 4, 1995 P.E.J. Legierse et aL, assignors to U.S. Philips & Du Pont Optical Co., New York

A method for electroless deposition of a metal layer from a metallization liquid on a flat side of an article to be metallized more in particular a master disk, characterized in that the side to be metallized is hydrophilic, the article is positioned with the hydro- philic side directed upwardly in an at least substantially horizontal position, the hy- drophilic side is made catalytic for electro- less deposition, the article is supported so as to be rotatable, a quantity of metalliza- tion liquid is deposited on the hydrophilic side of the article in a manner such that during deposition the metallization liquid assumes the shape of a layer of substan-

111

Page 2: In the metal finishing field

tially constant thickness bounded by the edges of the article while the article is slowly rotated at a speed so as to maintain the layer in a substantially stationary posi- tion until a metal layer of sufficient thick- ness is deposited and then the remaining metallization liquid is removed.

Selective Plating Process U.S. Patent 5,403,650. Apr. 4, 1995 D.W. Baudrand, Uncolnshire, IlL

A process for chemically and electro- lessly selectively depositing a high-purity nickel-boron alloy as a uniform and essen- tially crack-free layer over an existing met- allurgy pattern on the top side surface of a dielectric ceramic subsrate in an integrated circuit semiconductor assembly.

Process for Through-Hole Plating U.S. Patent 5,403,467. Apr. 4, 1995 F. Jonas and G-D Wolf, assignors to Bayer AG, Leverkusan, Germany

A process for the production of through- hole plated circuit boards and multilayers, wherein a conductive layer of a poly-

thiophene is produced on the walls of the through holes provided in the board by treatment with an emulsion of 3,4-ethyl- enedioxythiophene, said process compris- ing formation of through holes in copper- laminated circuit boards (base materials); oxidative treatment of the through holes with an alkaline potassium permanganate solution; rinsing with water;, treatment with an emulsion consisting essentially of 3,4- ethylenedioxythiophene and water, treat- ment with an acid; rinsing with water; and electrodeposition of copper.

Apparatus for Coating Fasteners U.S. Patent 5,403,624. Apr. 4, 1995 A, DiMaio et al., assignors to Nylok Fastener Corp., MaComb, Mich.

A method of continuously applying a coating material to externally threaded fas- teners, comprising positioning on fastener supporting notches on a rotating carriage; transferring to a belt with magnetic fastener holders that are synchronously alignable with the supporting notches; and applying the coating material to at least a portion of the fasteners.

Powder Spray Gun U.S. Patent 5,402,940. Apr. 4, 1995 C.B. Hailer et aL, assignors to Nordson Corp., WesUake, Ohio

A tribo-electric powder spray gun, which comprises a mixing section in which powder is mixed with a conveying gas; a charging section downstream of the mixing section in which the powder is electrically charged as it flows therethrough; and a sprayhead downstream of the charging sec- tion for dispensing the charged powder.

Fused Tin Chloride Electroplating Bath U.S. Patent 5,403,468. Apr. 4, 1995 H. Nakakoji et aL, assignors to Kawasaki Steel Corp., Japan

A process for the manufacture of nonre- flow tin plate comprising preheating a sub- strate to be tin plated at a temperature equal to or higher than the temperature of the tin plating in an atmosphere of a nonoxidizing gas; and electroplating the preheated sub- strate in a fused tin chloride plating bath comprising 15-55% mole of stannous chlo- ride, 30-70% mole of aluminum chloride,

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and 10--40% mole of sodium chloride or lithium chloride at a temperature of 150-- 232"C, and at a current density of 100-500 A/dm in an atmosphere of a nonoxidizing gas.

Sputtering U.S. Patent 5,403,663. Apr. 4, 1905 E. Sichmann et al., assignors to Leybold AG, Hanau, Germany

A coated substrate compr is ing a polycar- bonate substrate with an aluminum alloy coating having improved adhesion and cor- rosion resistance sputtered directly thereon, said coating consisting of 0.5-2.0% silicon and 99.5-98.0% aluminum.

Polyurethane Self-Priming Topcoats U.S. Patent 5,403,880. Apr. 4, 1995 C.R. Hegedus et aL, assignors to The United States of America as represented by the Secretary of the Navy, Washington

A corrosion-resistant self-priming coat- ing comprising 15 to 50 parts by weight of a polyurethane binder, 1 to 30 pans by weight of an alkaline earth metal phos- phate, 0.1 to 5.0 pans by weight of a zinc

benzoate, I to 25 parts by weight of an aluminum triphosphate, 1-30 parts by weight of titanium dioxide, 0 to 2.0 parts by weight of an oil-soluble surface active agent, and 0 to 50 parts by weight of at least one organic .solvent.

Spray Gun wi th D i s p o s a b l e M ixer U.S. Patent 5,405,083. Apr. 11, 1995 J.D. Moses, assignor to American Matrix Technologies Inc., Iowa City, Iowa

A method for applying a resin under pressure and in confluence with a catalyst in which the catalyst reacts with the resin to harden the resin and form a coating as the resin and catalyst are spread on an article.

Electrostatic Spray Gun U.S. Patant 5,405,090. Apr. 11, 1995 R.H. Greene and A.C. Outhwaite, assignors to The Morgan Crucible Co., PLC, England

An electrostatic spray gun comprising a housing; a handle adjacent the housing; a replaceable, collapsible container receiv- able in the housing; a nozzle in communi- cation with the container for spraying fluid

from the container; a delivery valve having inner and outer valve members; a squeeze gripping means mounted on the housing for transmitting a compressive force to the container to deliver fluid to the nozzle; and a high voltage generator for applying elec- trostatic potential to the fluid such that the fluid emerges from the nozzle in the form of an electrically charged atomized spray.

Blast Cleaning System U.S. Patent 5,405,283. Apr. 11, 1995 L.N. Goanka, assignor to Ford Motor Co., Dearborn, Mich.

An apparatus for cleaning a workpiece with abrasive carbon dioxide (CO2) snow.

Method of E tch ing A l u m i n u m Foil u.s. Patent 5,405,493. Apr. 11, 1995 D. Goad, assignor to KDK Corp., Ibaraki, Japan

A method of etching aluminum foil comprising the steps of depositing on the foil surface a discontinuous layer of metal that is cathodic to the foil in an electrolyte, and then electrochemically etching the foil in the electrolyte.

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Page 4: In the metal finishing field

Recovery Process u.s. Patent 5,405,507. Apr. 11, 1995 J.L Bishara et aL, assignors to Eltech Systems Corp., Chardon, Ohio

A method for the electrolytic recovery of product from an electrolyte solution con- taining metal in solution, including the electrolysis of an acidic solution, the recov- ery of metal, or both, comprising providing an electrolytic cell comprising an anode chamber and an anode therein; a cathode chamber and a cathode therein; a dia- phragm of a fibrous mat containing 5-70 weight percent organic halocarbon polymer in fiber form in combination with 30-95 weight percent of finely divided inorganic particulates, said diaphragm having a weight per unit of surface area of 3-12 kilograms per square meter.

Magnetron Sputtering Apparatus U.S. Patent 5,405,517. Apr. 11, 1995 C.M. Lampkin, assignor to Curtis M. Lampkin, Merritt Island, Fla.

A method for sputtering a compound thin film of selected coating materials onto

selected substrates, comprising providing an evacuable coating chamber containing a thermally cooled rotating primary magne- tron surrogate cathode, a plurality of con- lrollable auxiliary coating means for coat- ing the surface of the primary cathode with a plurality of selected materials, and caus- ing the controllable auxiliary coating means to cooperate to deposit upon the surface of said primary surrogate cathode a multimaterial coating containing all the necessary materials in controlled amounts,

wherein said multimaterial coating on the surface of said primary surrogate cathode is rotated into a sputter plasma zone of said primary cathode, causing the selected com- pound thin film to be deposited on at least one substrate.

Workpiece Holder u.s. Patent 5,405,518. Apr. 11, 1995 M-H. Hsieh and C-S. Chang, assignors to industrial Technology Research Institute, Hsinchu, Taiwan

An apparatus for high-temperature elec- trochemical etching operations containing a workpiece holder to be immersed in an etching fluid.

Zinc Alloy Plating Process u.s. Patent 5,405,523. Apr. 11, 1995 W.E. Eckles, assignor to Taskem Inc., Cleveland

A process for electrodepositing a zinc alloy onto a metal substrate comprising preparing an electroplating bath of zinc ions, alloy metal ions, and a brightening agent of a quaternary ammonium polymer.

Polyester Powder Coating u.s. Patent 5,405,910. Apr. 11, 1995 W-S. Kim and B-J. Kim, assignors to Korea Chemical Co., Kyunggi-do, Rep. of Korea

A process for preparing a powder coat- ing composition comprising acryl-modified polyester resins.

Powder Coating Composition u.s. Patent 5,405,912. Apr. 11, 1995 B. Simkin, assignor to Elf Atochem North America inc., Phi/adelphia

A solvent-free pigmented blend useful for powder coatings comprising a PVDF resin, a thermoplastic resin, a pigment, and 0.1-5.0 weight percent, based on the weight of the blend, of a VDF/TFE/HFP terpolymer.

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Page 5: In the metal finishing field

Polyurethane Powder Coating U.S. Patent 5,405,920. Apr. 11, 1995 ll.B. Barbee and B.S. Phillips, assignors to Eastman Chemical Co., Kingsport, Tenn.

A powder coating composition in the form of an intimate blend, in a finely di- vided form, comprising a polyester resin and a cross-linking effective amount of a blocked polyisocyanate.

Powder Coating U.S. Patent 5,405,925. Apr. 11, 1995 P. Kappler et aL, assignors to Elf Atochem S.A., France

A hardenable fluoridated copolymer of tetrafluoroethylene, vinylidene fluoride, and an allylic monomer.

Rotary Brush U.S. Patent 5,406,669. Apr. 18, 1995 B. Lesiw, assignor to The Milwaukee Brush Mfg. Co. Inc., Milwaukee

A rotary brush comprising a central hub. having a peripheral edge, and wherein a plurality of apertures are formed in the hub and located in predetermined spaced rela-

tion along the peripheral edge; and a plu- rality of knots of wires forming a brush face having an undulating width face di- mension.

Vacuum Coating Device U.S. Patent 5,407,314. Apr. 18, 1995 S. Kempf, assignor to Leybold AG, Hanau, Germany

An apparatus for synchronizing loading and unloading of substrates with turntable movement in a coating chamber.

Blasting Apparatus U.S. Patent 5,407,379. Apr. 18, 1995 ,I.D. Shank et al., assignors to Church & Dwight Co. Inc., Princeton, N.J. A differential pressure metering and dispensing system for abrasive media.

Sputtering Process U.S. Patent 5,407,548. Apr. 18, 1995 U. Kopacz et aL, assignors to Leybold AG, Hanau and Degussa AG, Frankfurt am Main, both of Germany

A process for coating a substrate with an alloy including at least nickel, chromium, and iron in an evacuable coating chamber comprising sputtering a target of nonamor-

phous material, supplying a reactive gas to the coating chamber, and depositing an amorphous layer on the substrate in the coating chamber.

Corrosion-Resistant Aluminum Wheel U.S. Patent 5,407,747. Apr. 18, 1995 R.K. Sammel and P.H. Radcliffe, assignors to Morton InternationaJ Inc., Chicago

A filiform corrosion-resistant aluminum automotive road wheel having a thermoset clearcoat on a bare aluminum surface, the clearcoat comprising the thermally cured product of a powder coating composition consisting essentially of a major amount of a thermosetting resin selected from the group consisting of polyurethanes, hydroxy functional polyesters, and glycidyl-func- tional acrylic resins, a curing agent, from l to 5% by weight of the coating powder, an epoxy resin as an adhesion promoting ad- ditive, and either an ultraviolet light alp sorber or a hindered amine light stabilizer or a mixture of both; with the proviso that when the powder contains acrylic resin, the curing agent consists of a solid dicarboxy- lic acid, and when the powder contains a

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hagent consists of a blocked isocyanate.

Sputtering Apparatus U.S. Patent 5,407,551. Apr. 18, 1995 P.A. Sieck et al., assignors to The BOC Group Inc., Murray Hill, N.J.

A planar magnetron device comprising a sputtering target having a first target sur- face with a first target perimeter, a planar second target surface opposite the first tar- get surface, and a side surface extending between the first and second surfaces.

Iridescent Chromium Coating U.S. Patent 5,407,749. Apr. 18, 1995 C. V Bishop, assignor to McGean-Rohco Inc., Cleveland

An article having a zinc-alloy surface containing at least 8% by weight of nickel, which has been coated with an iridescent chromium coating by contacting with an aqueous acidic solution at a temperature of 40 to 70"C, said solution comprising triva- lent chromium as substantially the only chromium ion present, halide ion, and a phosphorus acid selected from phosphoric acid, phosphorous acid, hypophosphorous

acid and mixtures thereof in an amount effective to provide a solution having a pH of 1.0 to 2.5; rinsing the surface with water;, and drying the surface.

Epoxy Powder Coating U.S. Patent 5,407,978. Apr. 18, 1995 R.M. Bymark et al., assignors to 3M Co., St. Paul, Minn.

A rapid curing powder epoxy coating composition having increased flexibility, incorporating minor amounts of aliphatic triepoxides.

Powder Clearcoat U.S. Patent 5,407,707. Apr. 18, 1995 R.L Simeone et al., assignors to PPG Industries Inc., Pittsburgh

A powder coating composition based on epoxy containing acrylic polymers and polyacid curing agents.

Method of Etching Copper U.S. Patent 5,409,567. Apr. 25, 1995 W.H. Lytle et al., assignors to Motorola Inc., Schaumburg, IlL

A method of etching comprising provid- ing a composite copper layer;, providing an

aqueous etch solution comprising a con- centration of ammonium ions, a concentra- tion of peroxydisulfate ions and a pH, the pH being within a range of 1.0 to 1.8; heating the etch solution to a first temper- ature; and disposing the etch solution on the composite copper layer.

Silver Recovery Apparatus U.S. Patent 5,409,582. Apr. 25, Igg5 W.D. Wimbish and R.C. Hallcher, assignors to Monsanto Co., St. Louis

A method for recovering metal from an aqueous solution containing ionic silver and ionic copper, comprising passing through a first electrowinning cell compris- ing at least one anode and at least one cathode, wherein the cell is operated at a cathode to calomel reference electrode po- tential in the range of - 0 . 1 - - 0 . 4 V DC to selectively recover at the cathode a pre- dominately silver metal from the solution; diluting the silver-depleted solution with an aqueous diluent; passing the diluted silver- depleted solution through a second elec- trowinning cell comprising at least one an- ode and at least one cathode, wherein the cell is operated at a cathode to calomel reference electrode potential less than -0 .5

SOLUTIONS TO YOUR PROCESS WATER AND WASTEWATER NEEDS

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Standard system sizes for 10 GPH to 250 GPM. Please contact us for more information

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V DC to recover predominately copper at the cathode thereof, thereby producing a silver- and copper-depleted solution, which is used as the aqueous diluent.

t sealer be )n of being t the world.

Sputtering Apparatus u.s. Patent 5,409,590. Apr. 25, 1995 S. Hurwitt et al., assignors to Materials Research Corp., Orengeburg, N.Y.

A target cooling and support apparatus for magnetron sputter coating.

Electrolyte Addit ive for Coloring A l u m i n u m u.s. Patent 5,409,592. Apr. 25, 1995 LD. Meyer et aL, assignors to Henkel KG auf Aktien, Dusseldorf, Germany

An electrolyte additive for a sulfuric acid coloring bath containing tin(II) for the alternating-current coloring of anodized aluminum surfaces, said electrolyte addi- tive comprising as antioxidant and as throwing power improver at least one or a combination of sulfosalicylic acid and 4-sulfophthalic acid; 2-sulfobenzoic acid; and benzene hexacarboxylic acid.

Brush Plating Process u.s. Patent 5,409,593. Apr. 25, 1995 M. Moskowitz, assignor to Sico Industries Inc., Cleveland

A method and apparatus for selective electroplating using soluble anodes.

Ultrasonic A g i t a t o r u.s. Patent 5,409,594. Apr. 25, 1995 M.M. AI-Jiboory and R.R. Timewell, assignors to Dynamotive Corp., Vancouver, Canada

A method of subjecting an elongated metal workpiece to be plated to a turbulent fluid flow, including immersing the work- piece in a fluid, moving the workpiece through the fluid along a preselected path of travel, and removing the workpiece from the fluid; and generating ultrasonic waves in the fluid as the workpiece travels through said ultrasonic waves being gener- ated so as to converge toward at least one point along the workpiece path of travel and being generated to have a frequency of" at least 500 kHz so that the waves induce a turbulent fluid flow in the fluid adjacent the workpiece.

Autodeposit ion C o a t i n g Process u.s. Patent 5,409,737. Apr. 25, 1995 W.G. Kozak and B.M. Ahmed, assignors to Henkel Corp., Plymouth Meeting, Pa.

A process for separating multivalcnt metal ions from autodeposition composi- tions and for regenerating chelating-type ion exchange resins.

METAL FINISHING • NOVEMBER 1995

Global Supplier of Alcor 570 Aluminum Seal Additive.

Our 570-ASA aluminum sealer Is a nickel-base proprietary compound used for sealing clear and colored anodized aluminum with tap water in 2 to 10 minutes. It seals clear anodizing at temperatures of 150 °F. to 170"F.

ALCOR 570-ASA was developed to eliminate smut conditions on dark to black colors of anodized aluminum. It is being used by major manufacturers in many demanding fields--the aircraft industry, the architectural aluminum finisher as well as by general manufacturers who require high-quality work.

In actual field tests, our product produced an anodizing seal with better resis- tance to corrosion and wear than a conventional acetate sealant. And in both field and laboratory tests conducted on ALCOR 570 seal additives, the following results have been shown: • Increased abrasion resistance • Salt spray resistance up to 1,000 hr./+ • 2-3 times longer tank life • 25% Improvement in UV radiation resistance

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UV-Curable Coating U.S. Patent 5,409,965. Apr. 25, 1995 N. Hosokawa and K. Hayama, assignors to Mitsubishi Petrochemical Co. Ltd., Tokyo

An abrasion-resistant coating composi- tion comprising a carboxylate-containing polyfunctional acrylate and silica sol.

Coating with Ion-Reactive Pigments u.s. Patent 5,409,970. Apr. 25, 1995 M.F.. Mosser and W.A. Harvey, assignors to Sermatech International Inc., Umerick, Pa.

A coating composition especially suited for the surface of galvanically active met- als, which imparts improved resistance to corrosion of metal due to acid and salt environments, comprising a resinous ther- mosetting polymer insert of a mixture of an epoxy resin having at least two epoxide groups and an aromatic homopolymer that can cure to form a polyamide-imide resin, a leachable pigment for inhibiting corrosion of the metals of a size that passes through a 325 mesh filter, and a metallic spheroid- like, ion-reactive pigment of an equivalent spherical diameter in the range of 2-10pro.

Automotive Topcoat u.s. Patent 5,409,994. Apr. 25, 1995 Y. Nakao et al, assignors to Kansai Paint Co. Ltd., Amagasaki, Japan

An automotive topcoat composition, comprising as the main components an acrylic polymer prepared by copolymeriz- ing 5-40% by weight of a alkoxysilane- containing vinyl monomer, 5-50% by weight of a hydroxyl-containing vinyl monomer, and 10-90% by weight of an- other vinyl monomer;, an amino resin in the amount of 5-50% by weight based on the total amount of resin solids in the coating composition; a nonaqueous particulate polymer; and a curing catalyst.

Water-Based Coatings u.s. Patent 5,410,001. Apr. 25, 1995 G. Ott et al., assignors to BASF Lacke & Farben AG, MOnster, Germany

A water-based coating comprising a cross-linking agent, which is free from iso- cyanate groups.

Spray Coating Process U.S. Patent 5,411,210. May 2, 1995 ,1.,1. Gimple et al., assignors to Ransburg Corp., Indianapolis

A process for automatic spray coating using conductive coating materials.

Spray Gun u.s. Patent 5,411,211. May 2, 1995 R.H. Greene et aL, Wesffield, Wetherby, Leeds, United Kingdom

An electrostatic spray gun comprising a housing for receiving a replaceable fluid container, a nozzle from which fluid is to be sprayed, means for expelling fluid from the container, and a high voltage generator for applying electrostatic potential to the fluid to form an electrically charged atom- ized spray at the nozzle.

Circuit Board Cleaning Process u.s. Patent 5,411,595. May 2, 1995 G.S. Bokisa et al., assignors to McGean-Rohco Inc., Cleveland

A process for removing contaminants from plated surfaces of an etched printed

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Engineered Systems for Wastewater Treatment and Chemical Recovery

No one technology is the correct solution for all applications. That is why we offer many different unit operations and engineer them into a treatment solution that is right for your individual needs.

Process Technologies Include:

Chemical Treatment ~ Clarification 6 Filtration ~ Ionexchange 8 Media Filtration 8 Microfiltration 6 Ultrafiltration ~ Evaporation

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118 METAL FINISHING • NOVEMBER 1995

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circuit comprising treating with a cleaning solution consisting essentially of an imida- zole-2-thione compound and an acid.

Nonchromated Oxide for Aluminum U.S. Patent 5,411,606. May 2, 1995 M.P. Schriever, assignor to The Boeing Co., Seattle

A process for forming an oxide film cobalt conversion coating on a metal sub- strate comprising contacting with an aque- ous reaction solution comprising a soluble cobalt-Ill hexacoordinated complex is present in the form of Me,,,[Co(R)6],,, wherein Me is one or more selected from the group consisting of Na, Li, K, Ca, Zn, Mg and Mn, and wherein m is 2 or 3 , n is 1 or 2, and R is a carboxylate having from 1 to 5 C atoms, the concenU'ation being from 0.01 M up to the saturation limit for a sufficient amount of time to oxidize the surface.

Seal for Anodized Aluminum U.S. Patent 5,411,607. May 2, 1995 M.A. Basaly et al., assignors to Novamax Technologies Holdings Inc., Mississauga, Canada

A process for sealing an anodically ox- idized aluminum surface comprising con- tacting with an aqueous solution compris- ing an amount of lithium ions effective to seal the anodically oxidized aluminum sur- face, wherein the aqueous sealing solution has less than 50 ppm of an element selected from the group consisting of the heavy metals, silicon, and phosphorus.

Copper Corrosion Inhibitor U.S. Patent 5,411,677. May 2, 1995 H.W. Picketing and Y. Wu, assignors to The Penn State Research Foundation, University Park, Pa.

A corrosion inhibition composition for metal, which comprises at least one com- pound selected from the group consisting of heterocyclic compounds known as tria- zoles; at ]east one compound selected from the group consisting of' compounds, pro- viding in aqueous solution iodide ions and compounds providing in aqueous solution bromide ions; and an aqueous medium wherein the compounds are present at con- ccntrations sufficient for the purpose of forming a corrosion inhibiting film.

Paint Stripper U.S. Patent 5,411,678. May 2, 1995 J.O. Sire, assignor to McGean-Rohco Inc., Cleveland

A paint-stripper composition comprising from 10 to 80% by weight of at least one organic solvent selected from the group consisting of benzyl alcohol alkyl-substi- tuted benzyl alcohols, furfuryl alcohol, alkyl-substituted furfuryl alcohols, and acetylenic alcohols containing from 3 to 5

High Quality Filter Presses... at Reasonable Prices

At Precise Filtration Presses Inc., we specialize in providing the highest quality filter presses at truly low costs. With over 12 years experience in the indus- try, we can assure you that you'll get the filter press that meets your needs at a price that fits your budget!

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CUSTOM Enclosures at STANDARD Prices... and NINE Other Reasons to Choose clin- n Power At Clinton Power, DC Rectifiers come in all kinds of pack-

ages. We manufacture units in many types of special enclosures at no extra cost. And, there are at least NINEother reasons to buy a Clinton Power product. 1. Commitment to the Customer - at Clinton the lines of communication are always

open.., before, during and after the sale. 2. Decision Makers - you'll always be able to speak with a knowledgeable Clinton

representative. 3. Assistance - help with service is a phone call away. 4. Quality Products - long life and easy serviceability are design criteria at Clinton

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mizing the operation and maintenance of our power supplies. 8. Field Proven - Clinton has over 30,000 units functioning in the field today. 9. Customer Satisfaction - Clinton Power supplies rectifiers to some of the largest

platers worldwide including: Boeing, NASA, McDonnell Douglas, UAL, UCLA, Westinghouse and GE.

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METAL FINISHING • NOVEMBER 1995 119

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carbon atoms; from 1 to 20% by weight of pyrrole; from O. 1 to 8% by weight of at least one other organic amine compound as an activator, and water.

Compos i t ion for Coat ing Metals U.S. Patent 5,412,011. May 2, 1995 B.S. Morris et aL, assignors to Betz Laboratories Inc., Trevose, Pa

An aqueous solution for coating a metal surface comprising an anionic acrylamide acrylic acid copolymer, a water-soluble in- organic silicate, and an organofunctional silane.

Basecoat /C learcoat U.S. Patent 5,411,809. May 2, 1995 M.D. Sha/ati et aL, assignors to The Sherwin- Williams Co., Cleveland

In a substrate coated with a multilayer decorative and/or protective coating, which comprises a basecoat comprising a pig- mented film-forming polymer, and a trans- parent clearcoat comprising a film-forming polymer applied to the surface of the basecoat composition; the improvement utilizing as the clearcoat and/or the

basecoat a multicomponent curable compo- sition, which is reactive upon mixing of the components, wherein the curable composi- tion comprises an acid-functional polymer, an anhydride-functional polymer, and an epoxy-functional compound having an av- erage of at least two cycloaliphatic epoxy groups per molecule.

Plastic Pr imer Coat ing U.S. Patent 5,412,000. May 2, 1995 U. Hellmann et al., assignors to Herberts, Germany

A sprayable plastic primer coating com- position for priming a polyolefin plastic surface of a structural vehicle part consist- ing essentially of 1 to 5% by weight of one or more ethylene/vinyl acetate copolymers, which have a vinyl acetate content of from 27 to 42 weight percent; 0.5 to 5% by weight of one or more chlorinated polyole- fins having a chlorine content of from l0 to 25 weight percent; 0.01 to 5% by weight of one or more epoxy resins prepared by re- action of aromatic polyols with epichloro- hydrin; and 85 to 98.49% by weight of one or more organic solvents containing at least one solvent selected from the group con-

sisting of xylene, toluene, and mixtures thereof.

Electroless Deposi t ion of Thermally Stable Carrier Polymers U.S. Patent 5,411,795. May 2, 1995 B. Silverman, assignor to Monsanto Co., SL Louis

A metallized textile article comprising a substrate coated successively with a poly- mer layer and a metal layer wherein the polymer layer comprises palladium and a water-insoluble organic polymer, which maintains its integrity at 200"C, said poly- mer selected from the group consisting of polysulfones, polyetherimides, polyimides, and polysiloxanes, and wherein the metal layer comprises electrolessly deposited metal providing a surface resistivity of at most 0.3 ohm/square.

Sputtering Method u.s. Patent 5,413,684. May 9, 1995 E. Bergmann, assignor to Ba/zers AG, Liechtenstein

A method and apparatus for regulating a degree of reaction in a coating process.

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• Recover the cost of heavy metals instead of paying for them to be hauled away.

• Minimizes sludge documentation, storage and transportation costs.

• Reduce future liability associated with sludge disposal.

• Reduce the impact of heavy metals to your current waste treatment systems.

• Recovers copper, nickel, zinc, cadmium, gold, silver and other precious metals.

• High surface area of cathodes insures low output concentration.

Technic's ELR System Metal Recovery Cell

For more information about the ELR System, or any of Technic's full line of plating equipment and supplies, call Technic, the source for it all.

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120 " METAL FINISHING • NOVEMBER 1995

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W e t Abrasive Blasting Apparatus U.S. Patent 5,412,910. May 9, 1995 J.P Woodson and L.M. Camarota, assignors to Whitemetal Inc., Houston

An apparatus for use in a wet abrasive blasting system, comprising a hopper for containing a quantity of abrasive particles; conduit for supplying a dry gas under pres- sure to the interior of the hopper;, a trans- port line connected to a source of pressur- ized air for transporting abrasive in the system; an abrasive particle feed line con- necting the interior of the hopper to the transport line; means for regulating the pressure of air in the transport line; and means for controlling the pressure of dry gas as applied to the interior of the hopper to permit a controlled flow of abrasive from the hopper into the transport line.

Push-Pul l Pickle L ine u.s. Patent 5,412,966. May 9, 1995 E.D. Neese and M.W. Botsford, assignors to World Class industries Inc., Ambridge, Pa.

A pickle line operable to remove oxides from steel strip, comprising a strip treat-

ment portion including means for uncoiling steel strip from a coil of the strip; means for pickling the strip in an acid solution to remove oxides; means for enabling simul- taneous visual inspection of the surface quality of opposite surfaces of the strip following pickling; and means for recoiling the strip following inspection.

Quick Disconnect for a Coating Device u.s. Patent 5,413,283. May 9, 1995 J.J. Gimple et aL, assignors to Ransburg Corp., Indianapolis

In combination, a quick disconnect and a coating material dispensing device, the dispensing device including a passageway through which coating material is supplied from a supply conduit.

Zinc-Rich Coat ing Compos i t i on u.s. Patent 5,413,628. May 9, 1995 R.R. Savin, Rancho Mirage, Calif.

In a coating composition for use in pro- tecting metallic substrates from corrosion, comprising in weight percent, based on the total weight of the composition, 7 to 35%

of alkyJ silicate as a film forming sub- stance; 35 to 55% of zinc powder, 5 to 25% of zinc flakes; 0.2 to 5% of at least one amorphous silica; and up to 30% particu- late ferrophosphate; the improvement wherein the alkyl silicate comprises, in weight percent, based on the weight of the alkyl silicate, 5 to 20% of tetraethyl ortho- silicate.

Heat-Treatable C h r o m i u m u.s. Patent 5,413,646. May 9, 1995 J. Dash and J. DeHaven, assignors to Blount Inc., Montgome~, Ala.

A method for electroplating a work- piece, comprising providing a plating bath comprising trivaient chromium produced by reducing a Cr(Vl) compound to Cr(III) with methanol or formic acid; ammonium formate; an inorganic iron compound; a sulfate catalyst; and a sufficient amount of sulfuric acid to provide a bath pH of 0.5 to 1.5; the bath being maintained substantially free of hexavalent chromium ions by the addition of sufficient amounts of methanol or formic acid; providing an anode in the plating bath; placing the workpiece in the bath to act as a cathode; electroplating a

Jaynor's Go ld Digger: Makes solid gold for 25 e an ounce.

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METAL FINISHING • NOVEMBER 1995

No more refining of solutions or burnable resins. Just send metal. Like all great ideas, the Jaynor Precious Metal Recovery System--the Gold Digger--is simplicity itself. Instead of using bulky resins, the 38-1b TV-sized Gold Digger attaches to your dragout tank and plates the metal out on a cathode panel. The metal is 80% to 90% pure. Start mining solid gold! JAYNOR can design and build a custom Gold Digger to fit your specific needs.

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Write or Call JAYNOR, INC., P.O. Box 429, Cary, IL 60013 / (708) 639-7738 Fax (708) 639-7738

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chromium and iron metal layer onto the workpiece by passing an electric current through the plating bath; and heating the workpiece from 600*F to 1,675"F for a sufficient period of time to harden while retaining or increasing the hardness of the chromium alloy plated on the workpiece.

Strip Coating Machine with Thickness C o n t r o l u.s. Patent 5,413,806. May 9, 1995 C. Braun, assignor to Hunter Engineering Co. Inc., Riverside, Calif.

A continuous strip coating machine comprising a top applicator roll for apply- ing a coating to a first face of a strip of material; a backup roll for positioning the strip of material against the top applicator roll; a bottom applicator roll for applying a coating to a second face of the strip of material after application of a coating to the first face and positioned to contact the strip after the strip leaves the backup roll; force measuring means for determining the force between the strip and bottom applicator roll; means for varying the force between the strip and bottom applicator roll; and control means coupled to the force measur-

ing means for varying the force between the strip and bottom applicator roll.

Metall izing Fluoropolymer Substrates U.S. Patent 5,413,687. May 9, 1995 C.L Barton and R.B. McGraw, assignors to Rogers Corp., Rogers, Conn.

A process for depositing a metal layer onto a surface of a fluoropolymer substrate comprising placing the fluoropolymer sub- strate in an atmosphere containing a mix- ture of ammonia gas and a noble gas; and bias sputtering a metal layer onto the sur- face of the fluoropolymer substrate while the substrate is present within the atmo- sphere of the gas mixture.

Hydrodynamical ly Modulated H u l l Cell u.s. Patent 5,413,692. May 9, 1995 J.A. Abys, Warren, N.J. and/.V. Kadija, Ridgewood, N.J.

An electroplating test cell for determin- ing the quality of electroplated deposits simultaneously in a wide range of current densities at a desired total applied current

value, comprising a container of noncon- ducting, noncontaminating material for holding an electrolyte, and a measuring instrument, which comprises an elongated cylinder of an electrically nonconducting material suspended within the container, the central axis of the cylinder being sub- stantially parallel to the central axis of the container and adapted to be rotated about its longitudinal central axis.

Electromagnet ic Shielding of Composi te Materials u.s. Patent 5,413,694. May 9, 1995 D.S. Dixon et aL, assignors to The United States of America as represented by the Secretary of the Navy, Washington, D.C.

A method of improving the electromag- netic shielding performance of a composite material having filler particles that are at least semiconductive suspended in a non- conductive resin, comprising electroplating a conductive material onto the surface to cause the conductive material to electri- cally connect to a portion of the filler par- ticles; and injecting, after electroplating, an exponentially decaying electromagnetic pulse through the composite material with

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METAL FINISHING • NOVEMBER 1995

Page 13: In the metal finishing field

the conductive material electroplated thereon, wherein the energy of the pulse is less than that required to cause localized melting of the composite material.

Powder Coating u.s. Patent 5,414,058. May 9, 1995 K. Ono et aL, assignors to Somar Corp., Japan

A powder coating composition compris- ing conventional epoxides with crystalline epoxides and curing agents.

Method for Achieving Recoat Adhesion u.s. Patent 5,413,809. May 9, 1995 I. Hazan, Clementon, N.J., assignor to E.L duPont de Nemours & Co., Wilmington, Del.

A method for in-line or end-of-line re- pair of an automobile or truck during their original manufacture, having a cured basecoat/clearcoat finish in which the clearcoat comprises an organosilane poly- mer, which comprises forming a repair basecoat by applying, over the clearcoat, a basecoat composition that is primarily non- silane containing but which comprises a silane curing catalyst; forming a repair top-

coat by applying wet on wet, over the repair basecoat, a clearcoat composition comprising an organosilane polymer, and curing the repair topcoat and basecoat to- gether.

Nonchromated Oxide Coating for A l u m i n u m u.s. Patent 5,415,687. May 16, 1995 M.P. Schdever, assignor to The Boeing Co., Seattle

An aqueous chemical bath for producing an oxide film cobalt conversion coating on a metal substrate, consisting essentially of a bath prepared by reacting in the presence of oxygen; a cobalt-II salt; an ammonium salt; and ammonium hydroxide (ammonia).

Two-Component Epoxy Priming Coat u.s. Patent 5,415,689. May 16, 1995 G. Wekenmann et al., assignors to Sika Chemie GmbH, Stuttgart, Germany

An anticorrosive zinc-containing under- coating composition for steel surfaces com- prising a first reaction component contain- ing 1-20% by weight of a water- emulsifiable epoxy resin, a synthetic resin

in an amount not exceeding 10% by weight in a liquid state or dissolved in an organic solvent, the amount of the organic solvent not exceeding 10% by weight, and 10--95% by weight of particulate zinc in the form of powder or flakes and a second reaction component containing 1-5% by weight of a polyamine and 5-15% by weight of water.

Particle Blast Cleaning Apparatus u.s. Patent 5,415,584. May 16, 1995 R.K. Brooke, assignors to TOMC02 Equipment Co., LoganvJlle, Ga.

A particle blast cleaning apparatus for use with sublimable blast media.

White Palladium Electroplating Bath u.s. Patent 5,415,685. May 16, 1995 V. Paneccasio and E. Too, assignors to Enthone- OMI inc., West Haven, Conn.

A method for depositing a white palla- dium metal coating on a substrate compris- ing immersing in a palladium electroplat- ing bath having a pH of 5-12 and containing brightener additives.

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Vacuum Coating Apparatus U.S. Patent 5,415,694. May 16, 1995 A Kunz and E. Bergmann, assignors to Balzers AG, Liechtenstein

]n a vacuum coating apparatus having a rotary-driven substrate carrier, the im- provement comprising means defining a rotary feedthrough through a wall of the vacuum chamber;, a rotary member for ro- tation feedthrough and for carrying the sub- strate carrier; and a hydrostatic bearing supporting the rotary member in the feedthrough for supporting rotation of the rotary member and for supporting the sub- strate carrier.

Black Chromium Conversion Coatings U.S. Patent 5,415,702. May 16, 1995 C. V Bishop et aL, assignors to McGean-Rohco Inc., Cleveland

A method of depositing a black chro- mium containing conversion coating on a zinc-nickel alloy surface containing at least 8% nickel in the alloy, or on a zinc-iron alloy surface, which comprises contacting with a hexavalent chromium-free aqueous acidic solution at a temperature of 20 to

35"C, said solution comprising trivalent chromium, and an amount of a phosphorus acid selected from phosphoric acid, phos- phorous acid, hypophosphorous acid, and mixtures thereof effective to provide a so- lution having a pH of 1.0 to 2.5.

Electrocoated Resist U.S. Patent 5,415,749. May 16, 1995 W.L Hamilton, assignor to EL DuPont de Nemours & Co., Wilmington, Dei.

A process for electrodeposition of resist formulations, which contain metal salts of B-diketones.

Process for Applying a Structured Surface Coating U.S. Patent 5,415,761. May 16, 1995 K. MOll, assignor to Heidelberger Druckmaschinen AG, Heidelberg, Germany

A process for electrochemically deposit- ing a surface layer on a component, which comprises defining an electrical parameter selected from the group consisting of elec- trical potential and electrical current effect- ing an electrochemical layer deposition; and depositing a surface layer on the corn-

ponent having a structured outer surface topography, by providing an initial pulse of the electrical parameter having a trapezoi- dal shape and forming a plurality of island formations of deposition material on a sur- face of the component to be electrochemi- cally coated, and subsequently providing a follow-up pulse of the electrical parameter having a trapezoidal shape and causing a growth of the deposition material on the plurality of islands for forming the struc- tured outer surface topography.

Electrocoating Process U.S. Patent 5,415,750. May 16, 1995 K. Klein et a/., assignors to Herberts AG, Wuppertal, Germany

A bath for electrophoretic coating capa- ble of cathodic deposition with additives for enhancing surface appearance and the use of said additives in coating processes.

Sputtering Apparatus U.S. Patent 5,415,754. May 16, 1995 B.tN. Manley, assignor to Sierra Applied Sciences Inc., Boulder, Colo.

A method and apparatus for sputtering magnetic target materials.

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124 " METAL FINISHING . NOVEMBER 1995

Page 15: In the metal finishing field

Sputtering Device U.S. Patent 5,415,757. May 16, 1995 J. Szcyrbowski et al., assignors to Leybold AG, Hanau, Germany

An apparatus for coating a substrate with electrically nonconductive coatings.

Method for Removal of H e x a v a l e n t C h r o m i u m U.S. Patent 5,415,848. May 16, 1995 R.F. Thornton, assignor to General Electric Co., N.Y.

A method for removing chromium from an aqueous sodium nitrate solution contain- ing bexavalent chromium, which com- prises admixing with the solution an effec- tive amount of a chromium-roducing compound consisting of ferrous sult'ate to reduce all of the hexavalent chromium in the aqueous sodium nitrate solution to trivalent chromium, and an effective amount of barium nitrate to precipitate all of the sulfate anion of the chromium-reduc- ing compound, adjusting the pH to between 8.5-14.0 by adding sodium hydroxide to the solution to precipitate all of the triva- lent chromium and ferrous cation of the chromium-reducing compound and then re-

moving the trivalent chromium precipitate from the aqueous sodium nitrate solution.

Coating Composit ion U.S. Patent 5,415,895. May 16, 1995 E.W. Kinkelaar, assignor to Texo Corp., Cincinnati

A process for manufacturing a dry-to- touch coating composition having corro- sion resistance and torque, comprising add- ing polytetrafluoroethylene to an oil containing an amine soap, said polytet- rafluoroethylene comprising 10-30% of the blend by weight; mixing a resin form- ing paint component; adding water to the mixed paint component; adjusting the pH until it is in the range of 8.2-9.6; coating a substrate with the resin, water, and oil mix- ture; and exposing to a temperature be- tween 175 to 250"F until it is dry to touch.

E lec t rop la t i ng Process U.S. Patent 5,415,762. May 16, 1995 G.R. Allardyce et at., assignors to Shipley Co. Inc., Marlborough, Mass.

A method for electroplating the surface of a nonconductor comprising the steps of contacting with a charged adsorption mod-

ifier, contacting with a preformed aqueous colloid or emulsion of a conductive poly- mer having a charge opposite to the charge of the adsorption modifier to deposit a con- ductive polymer layer over the surface of the nonconductor and metal plating the sur- face of the nonconductor having conduc- tive polymer thereon by passing a current between electrodes immersed in an electro- lyte containing dissolved plating metal where one of the electrodes comprises the nonconductor to be plated.

Methods and Electrolyte Composit ions for Electrodepositing C h r o m i u m Coatings U.S. Patent 5,415,763. May 16, 1995 C.E. Johnson et al., assignors to The USA as represented by the Secretary of Commerce, Washington, D.C.

A method for electrodepositing a chro- mium coating on a substrate, comprising immersing in an aqueous electrolyte, and passing a sufficient current through the electrolyte to effect deposition of a chro- mium coating on the substrate, the aqueous electrolyte comprising 0.2 to 0.6 M of

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125

Page 16: In the metal finishing field

trivalent chromium ions, greater than 1.4 M of an amidosulfonic acid or a salt thereof, ammonium ions, formic acid or a salt thereof, and water.

Masking Material U.S. Patent 5,415,923. May 16, 1995 S.D. Sarokin and J.E. Dayton, Jr., assignors to International Paper Co., Purchase, N.Y.

A paint masking material comprising a fibrous base coated on one surface with a paint-permeable coating and coated on the other surface with a paint-impervious coat- ing.

Degreasing Solution U.S. Patent 5,415,797. May 16, 1995 M. Ishida and S. Shiratshi, assignors to Nippon Paint Co. Ltd., Osaka, Japan

A method of degreasing a metal selected from the group consisting of iron, zinc, and aluminum comprising bringing a phos- phate-free degreasing solution in contact with the metal to be processed, wherein the degreasing solution contains an alkali sili- cate, a water-soluble polycarboxylate and a nonionic surfactant and initially has a pH

value in a range of 10.5 to 12.5; the con- centration of alkali silicate is 100 ppm or more calculated as Si concentration; the concentration of a water-soluble polycar- boxylate is in a range of 0.01 to l0 g/L; the concentration of a nonionic surfactant is in a range of from 0.01 to 10 g/L; and the free alkali extent is in a range of 5 to 25 points.

Epoxy Electrocoat U.S. Patent 5,416,137. May 16, 1995 L.A. Tumquist et al., assignors to E.L DuPont de Nemours and Co., Wilmington, Del.

A cathodic electrocoating composition having improved throw, containing multi- functional phenols.

C o a t e d A b r a s i v e u.s. Patent 5,417,726. May 23, 1995 G.M. Stout et aL, assignors to 3M, St. Paul, Minn.

A method of making a coated abrasive article with a hardened backing, compris- ing combining and heating a tough, heat- resistant, thermoplastic binder material and a fibrous reinforcing material to form a softened, moldable mixture; forming a shaped object out of the softened, mold- able, mixture; cooling and solidifying the

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S p r a y D e v i c e with Rotary T a b l e u.s. Patent 5,417,763. May 23, 1995 P.J.F. Diapens, assignor to OD & ME B.V, Eindhoven, Netherlands

A device for applying a lacquer coating to a disk- shaped registration carrier.

P o w d e r S p r a y B o o t h Cleaning u.s. Patent 5,417,765. May 23, 1995 T. Otani et at., assignors to Nordson Corp., Westlake, Ohio

An apparatus for cleaning a powder coating booth.

Blasting Apparatus U.S. Patent 5,417,608. May 23, 1995 C.P. EIliott, assignor to Blast Cleaning Products Ltd., Oakville, Canada

A blast cleaning apparatus and method with laterally moving conveyor.

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