Post on 15-Dec-2015
transcript
Breakthrough Waterborne Alkyd Technology for Interior Wood Stains
Michael KnightPCCR USA, INC.Technical Service ManagerOctober 9, 2014
AGENDA
BACKGROUND ALKYD DEVELOPMENT EMULSIFICATION PROCESS EMULSION STABILITY STAIN FORMULA OPTIMIZATION PENETRATION TEST LAPPING RESISTANCE TEST GRAIN RAISE RESISTANCE EXTERIOR STAIN CONCLUSION
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BACKGROUND
SOLVENTBORNE CONVENTIONAL SOLIDS LONG OIL ALKYDS USED FOR WOOD STAINS
AS VOC REGULATIONS TIGHTENED, HIGH SOLIDS ALKYDS INTRODUCED SLOWER CURE DUE TO LOWER MW
THEN WATER REDUCIBLE LONG OIL ALKYDS INTRODUCED HYDROLYSIS ISSUE
ALKYD EMULSIONS SAME PENETRATION INTO WOOD NOT SEEN AS WITH
SOLVENTBORNE
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BACKGROUND
ALKYD EMULSION DEVELOPED TO OVERCOME SHORTCOMINGS OF EARLY OFFERINGS
VERY GOOD HYDROLITIC STABILITY EXCELLENT PENETRATION INTO WOOD EXCELLENT LAPPING RESISTANCE EXCELLENT GRAIN RAISE RESISTANCE
ALKYD DEVELOPMENT
EMULSION OF TRADITIONAL LONG OIL ALKYD– POOR PENETRATION, LAPPING AND GRAIN RAISE
RESISTANCE
ALKYD BACKBONE WAS MODIFIED TO IMPROVE– LONGER OIL LENGTH– RESULTANT LOWER MW– FASTER DRYING OIL
STAIN PERFORMANCE WAS IMPROVED
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EMULSIFICATION PROCESS
CRITICAL PARAMETERS– SURFACTANT TYPE– SURFACTANT LEVEL– SHEAR RATE– RESIN AND WATER TEMPERATURE– WATER ADDITION RATES
OBSERVATIONS– VERY FORGIVING PROCESS– HIGH TO LOW SHEAR– ADDITION OF SURFACTANT CRITICAL
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EMULSION STABILITY – 140 F HOT BOX
LAB HIGH SHEAR– BEWOID BLADES– ~500 NM – 10 WEEKS HOT BOX STABLE
PILOT HIGH SHEAR– ROTOR STATOR– ~300 NM – 10+ WEEKS HOT BOX STABLE
LAB LOW SHEAR– NORMAL PADDLE BLADES– ~600 NM – 8 WEEKS HOT BOX STABLE
PILOT LOW SHEAR– SAME STABILITY
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BEWOID BLADE
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STAIN FORMULA OPTIMIZATION
OPTIMIZATION FOR OPEN TIME AND LAPPING– PROPYLENE GLYCOL AS SOLVENT– CAN BE FORMULATED TO AS LOW AS 50 G/L VOC
OPTIMIZATION FOR COLOR ACCEPTANCE– ADM 750 DISPERSANT
OPTIMIZATION FOR GRAIN PENETRATION– WHITE STREAKS IN STAINED WOOD
• ENVIROGEM® 2010 SURFACTANT
OPTIMIZATION FOR DRY TIME/URETHANE CLEARCOAT ACCEPTANCE– 3% BORCHI® OXYCOAT 1101/0.3% CA (HYDRO-CEM®)– 2% BORCHI® OXYCOAT 1101.0.2% ZR/0.2% CA (HYDRO-
CEM®)
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50 g/L VOC TINTABLE STAIN FORMULATION
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PENETRATION TEST
NO QUANTITATIVE TEST METHOD DESIGNED OUR OWN QUALITATIVE TEST COUPLE DROPS OF STAIN PLACED ON BOARD COVER 15 MINUTES WITH WATCH GLASS AND
OBSERVE– EXTERIOR ACRYLIC STAIN – SITS ON SURFACE– INTERIOR ACRYLIC STAIN – MORE CONTACT WITH
WOOD– ALKYD EMULSION – SPREADS ON WOOD AND
PENETRATES
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PENETRATION TEST
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LAPPING RESISTANCE TEST
COMMON APPLICATION PROBLEM– STOPPING MID-FLOOR OR MID-BOARD
WIPE STAIN ONTO 9 INCHES OF 12-INCH OAK FLOOR BOARD
AFTER TWO MINUTES, WIPE OFF EXCESS WAIT 20 MINUTES APPLY STAIN TO OTHER END OF BOARD
WITH 3-INCH OVERLAP AFTER TWO MINUTES, WIPE OFF EXCESS OBSERVE
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LAPPING – 20 MINUTES BETWEEN COATS
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GRAIN RAISE RESISTANCE
WOOD IS POROUS SUBSTRATE WATER SWELLS THE WOOD GRAIN ROUGH TO TOUCH SOLVENTBORNE STAINS DO NOT HAVE GRAIN
RAISE ISSUES TYPICALLY, WATERBORNE STAINS DO ALKYD EMULSION STAIN HAS EXCELLENT
GRAIN RAISE RESISTANCE
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EXTERIOR STAIN
FORMULA TRANSFORMATION FOR WATER BEADING
– SILICONE AND PARRAFIN WAX EMULSIONS ADDED
FOR UV DURABILITY– TINUVIN® 1130 AND TINUVIN® 292 ADDED
FOR FUNGUS CONTROL– A FUNGICIDE WAS ADDED
GLOSS WAS FLATTENED WITH SILICA COMPARED TO 6 COMMERCIAL DECK STAINS ONE YEAR OUTDOOR EXPOSURE TO DATE
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EXTERIOR STAIN – ONE YEAR OUTDOOR EXPOSURE – CARPENTERSVILLE, IL
GLOSS RETENTION 20
DEGREE
GLOSS RETENTION 60
DEGREE
DELTA E
ALKYD EMULSION
100% 65% 3.8
STAIN #1 100% 44.4% 3.0
STAIN #2 50% 34.2% 4.05
STAIN #3 50% 44.9% 3.6
STAIN #4 100% 22.5% 2.5
STAIN #5 100% 92.3% 4.0
STAIN #6 50% 83.4% 2.3
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SUMMARY
“HOLY GRAIL” FOR REFINISHING WOOD FLOORS
EXCELLENT STAIN PENETRATION EXCELLENT LAPPING RESISTANCE EXCELLENT GRAIN RAISE RESISTANCE VOC AS LOW AS 50 G/L, LOWER POSSIBLE FEASIBLE AS EXTERIOR DECK STAIN
ANY QUESTIONS……