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RHEOLATE®

HX 6008

Extremely high efficient nonionic synthetic associative thickener (NiSAT) for

excellent high shear viscosity with additional low and mid-shear viscosity

contribution

Key Benefits

Extremely high efficiency

Suitable in a

broad range of latex chemistries

Low influence on

final coating properties

Application Leaflet

October 2014

2

Introduction

RHEOLATE®

HX 6008 is a novel nonionic synthetic associative thickener (NiSAT) which has outstanding rheological properties for aqueous applications. It develops high shear viscosity (ICI) very efficiently, and additionally displays some mid-shear viscosity contribution. RHEOLATE

® HX

6008 is effective in a broad range of latex chemistries.

Chemical and Physical Data

Composition Solution of apolyether polyurethane polymer in water

Appearance Opaque liquid

Specfic gravity 1.05 g/ml

Active solids (% by weight)

25%

Brookfield viscosity

(RVT, spindle 4, speed 20 rpm, @25°C)

1000– 4000 mPa·s

pH 4 - 6

VOC

(ASTM D 6886-03) < 0.2%

Incorporation and Levels of use

RHEOLATE® HX 6008 can be used as supplied or, if necessary, further diluted with water. Addition can take place at any time during the manufacturing process, but incorporation into the mill base before the letdown is recommended. RHEOLATE® HX 6008 can be combined with other associative rheological additives, clay based thickeners or cellulosic thickeners for higher packaged viscosity. It is important to assess the effectiveness of RHEOLATE® HX 6008 in the entire system, as performance can be affected by other raw material ingredients. Further detailed background information on the technology of nonionic synthetic associative thickeners can be found in the Elementis Specialties RHEOLOGY HANDBOOK.

Typical use levels of RHEOLATE® HX 6008 are in a range 0.1% to 1.5% (product weight) related to the total system weight.

Key Benefits

Extremely high efficient thickener with both ICI and KU properties.

Compatible in various resin systems and especially efficient with acrylic and sty-rene acrylic resins.

Excellent balance of sag, flow, and lev-elling.

Minimal effect on final paint properties.

EU Ecolabel confirmation available.

3

Overview of tested paint systems

RHEOLATE®

HX 6008 was evaluated in several paint formulations:

Subject: Comparison in binder technologies

● Pure Acrylic Based Paint (PVC 30%) Page 4

For exterior coatings, plasters and external wall insulation systems and

primers

● Styrene Acrylic based Paint (PVC 50%) Page 6

For interior paints, textured finishes, gloss/satin latex paints, primers

and silicate emulsion paints

Subject: Complexity in paint formulations

● Pure Acrylic based Paint (PVC 30%) Page 9

For exterior coatings, plasters and external wall insulation systems and

primers

Subject: Influence on final coating properties

● 1C Acrylic High Gloss Clear Wood Coating Page 10

For parquet varnishes, wood stain sealers, MDF, and furniture coatings

● Waterborne High Gloss White Alkyd Paint Page 12

For high gloss decorative (DIY) paints and for industrial paints

.

4

Emulsion paint PVC 30% pure Acrylic Raw material Weight in

% Function Supplier

Millbase stage Tapwater 7.55 Diluent

Add under stirring in the denoted order NUOSPERSE® FX 504 0.10 Dispersing agent Elementis Specialties DAPRO® DF 7005 0.20 Defoamer Elementis Specialties Sodium polyphosphate 0.50 Softener BK Giulini

Titanium dioxide 4.10 Pigment Kronos International

Calcium carbonate, various particle size 21.7 Extender Omya

Micro Talc 2.40 Extender Mondo Minerals

Aluminium silicate 1.10 Extender Evonik

Grind for 15 min. at 10 m/s. Add and stir for further 10 minutes at low speed

DAPRO® DF 7005 0.05 Defoamer Elementis Specialties Tapwater 10.00-X Diluent

Add under stirring Mowiltith LDM 7717 51.55 Binder Celanese

Dowanol DPnB 0.55 Coalescing agent Dow Add and stir slightly for 10 min.

Rheological additive(s) X Rheological additive

Ammonia Solution w=25% 0.15 pH adjustment

Parmetol A 26 0.05 In can preservative Schülke&Mayr

100.00

Loading level comparison at equal ICI viscosity of 2.2P

1% of RHEOLATE® HX 6008 was sufficient

to obtain the required ICI viscosity of 2.2P

measured with an ICI-rheometer.

The high efficiency of RHEOLATE® HX 6008

required the lowest amount of thickener to

obtain the same ICI viscosity of 2.2P.

Efficiency Evaluation in a Pure Acrylic based Paint

Pure Acrylic based Paint (PVC 30%) Formulation

The test formulation was based on

an aqueous copolymer emulsion

of acrylic/methacrylic acid esters.

The APEO-free binder has a solid

content of 46%, Tg of 23°C and a

particle size of 120 µm. It is

commonly used in exterior

coatings e.g. for masonry paints

containing coalescing agents,

deep shade paints, plasters and

textured coatings, external wall

insulation systems and primers.

Test Formulation

5

The flow curve of the paint based on RHEOLATE® HX 6008 confirmed the additional contribution to the

low-mid shear viscosity in comparison to the paints with reference thickeners.

Rheogram

By adjusting the formulations to an equal ICI-viscosity value the resulting Krebs-Stormer viscosity will

vary. 1% of RHEOLATE® HX 6008 yielded the largest KU contribution and resulted in a ready to apply

paint. The Krebs-Stormer viscosities of the paints with reference thickeners were too low for practical use

and required additional adjustments with a KU-thickener to increase mid shear viscosity.

Mid shear viscosity build

Efficiency Evaluation in a Pure Acrylic based Paint

6

Efficiency Evaluation in a Styrene Acrylic based Paint

This evaluation was made

with Acronal S790. Market

feedback confirmed the

functionality in this latex

technology. The binder is

APEO-free, has a solid

content of 50%, a MFT of

20°C and a particle size of

100 µm. The binder is

generally used for interior

paints, textured finishes,

gloss/satin latex paints,

primers and silicate emulsion

paints. It can be suitable for

exterior paints, concrete

protection coatings and

exterior insulation systems.

Only 1.8 % of RHEOLATE® HX 6008 was needed to achieve an ICI-viscosity of 2.2P, which is in this test

the lowest required loading level. The reference formulations needed at least 3.2% of thickener in order to

achieve the target viscosity.

Emulsion Paint PVC 50% Styrene Acrylic

Raw material Weight in %

Function Supplier

Millbase stage

Tapwater 14.90 Diluent

Add under stirring in the denoted order

Sodium polyphosphate 0.10 Softener BK Giulini

NUOSPERSE® FX 504 0.10 Wetting agent Elementis Specialties

DAPRO® DF 7005 0.30 Defoamer Elementis Specialties

Titanium dioxide 5.80 Pigment Kronos International

Calcium carbonate, various particle size

30.9 Extender Omya

Micro Talc 3.40 Extender Mondo Minerals

Aluminium silicate 1.50 Extender Evonik

Grind for 15 min. at 10 m/s.

Add and stir for further 10 minutes at low speed

DAPRO® FX 511 0.80 Coalescing agent Elementis Specialties

Acronal S 790 32.10 Binder BASF

DAPRO® DF 7005 0.10 Defoamer Elementis Specialties

Tapwater 9.70-X Diluent

Add and stir slightly for 10 min.

Rheological additive(s) X Rheological addi-tive

Ammonia Solution w=25% 0.20 pH adjustment

Parmetol A 26 0.10 In can preservative Schülke&Mayr

100.00

Loading level comparison at equal ICI viscosity of 2.2P

Styrene Acrylic based Paint (PVC 50%) Formulation

7

Efficiency Evaluation in a Styrene Acrylic based Paint

Mid shear viscosity build

A Krebs-Stormer viscosity of 90 was obtained with 1.8% of RHEOLATE® HX 6008, which represents an

acceptable level for application.

Rheogram

The rheogram shows that RHEOLATE® HX 6008 increased the viscosity over the full shear rate range

up to 1000 s-1. The reference thickeners in this latex technology yielded lower KU-viscosity values com-

pared to RHEOLATE® HX 6008. They needed a small adjustment with a second KU-builder to reach

workable viscosities.

8

Complexitiy Reduction Evaluation

Pure Acrylic based Paint (PVC 30%) Formulation

The reference formulations did not achieve both ICI-

and KU-viscosity targets with only one thickener.

They required a larger quantity of an ICI-thickener

and a small additional amount of KU-builder.

With RHEOLATE® HX 6008 however, only one

thickener was needed to reach both mid and high

shear viscosity targets. Moreover, with RHEOLATE®

HX 6008 the rheological profile was obtained with the

highest efficiency, i.e. the lowest total amount of

thickener was required.

Loading level

Rheological Additive KU ICI

[unit] [P]

RHEOLATE® HX 6008 117 3.0

Combination 1 117 3.2

Combination 2 119 2.8

One way to control costs in paint production is by reducing the complexity. This can, amongst others, be

achieved by the reduction of the number of raw materials that simplifies the formulation.

Many formulating practices require a combination of a high shear and a low shear thickener in order to

meet a targeted rheological profile. RHEOLATE® HX 6008 has the ability to take over the functions of both

high shear and a low shear thickener and aids to simplify the paint formulation.

To illustrate this property of RHEOLATE® HX 6008 we evaluated the replacement of a combination of two

thickeners by just RHEOLATE® HX 6008 in a PVC 30% acrylic paint.

The paints were formulated at equal ICI viscosities of 3 ± 0.2P and equal KU-viscosities of 118 ± 1P.

9

Complexitiy Reduction Evaluation

Loading Sag re-

sistance Levelling Brush-out Roller Spatter

Rheological Additive

[%] [µm] 0 - poor

10 – excellent

0 – poor

5 – excellent

RHEOLATE® HX 6008 1.5 400 3 4-5 5

Combination 1 ICI KU

3.4 0.3

400 3-4 5 5

Combination 2 ICI KU

2.0 0.1

400 3 5 5

The rheogram shows that RHEOLATE® HX 6008 provided less shear thinning flow characteristics than

both formulations with thickener combinations, nevertheless RHEOLATE® HX 6008 yielded the same ap-

plication properties (see table below).

Despite the lower viscosity at lower shear rates, the sagging performance of the RHEOLATE® HX 6008

based paint is similar to the paints with the thickener combination. Also properties such as levelling, brush

-out and roller spattering behaviour were very similar. Differences can be qualified as non significant.

Rheogram

10

1C Acrylic High Gloss Clear Wood Coating Formulation

Evaluation of the Influence on Final Coating Properties

1 C High performance wood coating (Glossy) Raw material Weight in

% Function Supplier

Alberdingk AC 2714 83.00 Binder Alberdingk Boley

Add under stirring in the denoted order

DAPRO® DF 900 1.60 Defoamer Elementis Specialties

DAPRO® W-77 0.50 Substrate wetting Elementis Specialties

Dowanol DPM 4.00 Coalescing agent DOW

Dowanol DPnB 5.00 Coalescing agent DOW

Rheological additive(s) X Rheological additive

Water 5.90-X Diluent

Disperse for 10 min. 6 m/s

100.00

To achieve a stable DIN 4 cup viscosity of 100 seconds, the formulation with RHEOLATE® HX 6008

required a significantly lower loading level than the formulation with the reference thickener system. The

blank formulation without thickeners had a DIN 4 mm cup viscosity of 14 seconds. At equal DIN 4 cup

viscosity, the formulation with RHEOLATE® HX 6008 showed higher Brookfield viscosity over the full

shear rate range.

The acrylic binder emulsion is a universal self-crosslinking multiphase acrylic dispersion. The binder has

a solid content of 44%, MFT of 50°C and Koenig pendulum hardness of 105.

It is commonly used for parquet varnishes, wood stain sealers, concrete floorings, MDF, furniture and

general plastics like ABS, PC, etc.

Comparison of loading level respectively Brookfield Viscosity at equal

formulated DIN 4 cup viscosity

Brookfield Viscosity

11

Evaluation of the Influence on Final Coating Properties

Influence on film properties

The initial hardness of the clear coat containing RHEOLATE® HX 6008 was already on a higher level

than the reference clear coat and over time the hardness continued to develop much faster. This illus-

trates that RHEOLATE® HX 6008 has limited influence on the primary coating properties.

The same trend was found for the obtained gloss. The gloss of the clear coat based on RHEOLATE® HX

6008 was much higher.

12

The main binder, WorleeSol E 150 W, is a waterthinnable polyurethane modified alkydemulsion with a

solid content of 40% in water. The alkydresin has an oil content of 40% and an acid number of max. 30.

The emulsion is multifunctional applicable. It is especially recommended for high gloss systems in the

decorative segment and also for industrial paints.

Evaluation of the Influence on Final Coating Properties

Waterborne High Gloss White Alkyd Paint Formulation

Waterborne High Gloss White Alkyd Paint

Raw material Weight in %

Function Supplier

Water 5.00 Diluent

NUOSPERSE® FX 600 1.00 Dispersing agent Elementis Specialties

NUOSPERSE® FX 365 0.25 Dispersing agent Elementis Specialties

Kronos 2190 22.50 Pigment Kronos International

DAPRO® DF 7580 0.20 Defoamer Elementis Specialties

Disperse 1-5 for 30 minutes at 10 m/sec. tip speed (fines of grind < 10µm)

WorleeSol 65R 10.20 Resin Worlee-Chemie GmbH

Propylene glycol 2.10 Solvent

Water 4.00 Diluent

Add 6-8 under stirring in the denoted order

Add 9 – 14 under stirring slightly for 10 minutes

WorleeSol E 150W 49.30 Resin Worlee-Chemie GmbH

Borchi® OXY Coat 1101 0.30 Dryer OMG-Borchers GmbH

Rheological additive(s) X Rheological additive

DAPRO® DF 7580 0.10 Defoamer Elementis Specialties

Water 5.05-X Diluent

100.00

Rheogram

Both formulations displayed only marginal differences in the flow characteristics.

13

Evaluation of the Influence on Final Coating Properties

Rheogram and Storage stability

The initial rheograms of the alkyd paints based on RHEOLATE® HX 6008 and the reference formulation

based on two thickeners were almost identical (bold lines).

After storage of the paints for four weeks at 40°C, both paints showed a decrease in viscosity, but the

paint based on RHEOLATE® HX 6008 showed a smaller viscosity decrease and thus was more stable.

Brookfield Viscosity

Rheological Additive Loading KU

Brookfield viscosity [mPa.s]

RVT setup 6 Spin. 6 ICI

[%] 10 rpm 20 rpm 50 rpm 100 rpm [unit] [P]

RHEOLATE® HX 6008 0.5 2500 2400 2060 1760 96 1.7

Combination 1 ICI KU

0.24

0.07 2500 2300 2000 1710 96 1.5

With RHEOLATE® HX

6008 as sole thickener

a similar Brookfield vis-

cosity was achieved.

Application Properties of high gloss alkyd emulsion paints based on Worleesol

E 150W

With RHEOLATE® HX 6008 the application performance of a PU-modified alkyd based paint can be im-

proved in terms of sag resistance and brush-out. The paint becomes more robust and shows less sensi-

tivity on the development of surface defects.

Rheological Additive

Loading Sag resistance Levelling Brush-out Surface

defects

Storage

stability

[%] [µm] 0 - poor

10 – excellent

0 – poor

5 – excellent

RHEOLATE® HX 6008 0.5 350 6 5 4 5

Combination 1 ICI KU

0.24

0.07 300 6 4 3 4

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Elementis UK Ltd

c/o Elementis GmbH

Stolberger Strasse 370

50933 Cologne, Germany

Tel: +49 221 2923 2066

Fax: +49 221 2923 2011

Elementis Specialties Asia

No. 99 Lian Yang Road

Songjiang Industrial Zone

Shanghai 201613

P.R. China

Tel: +86 21 57740348

Elementis Specialties, Inc.

469 Old Trenton Road

East Windsor, NJ 08512

USA

Tel: +1 609 443 2500

Fax: +1 609 443 2422

Learn more about our products

and visit our website!

www.elementis-specialties.com

or email us at:

waterinfo@elementis.com

RHEOLATE® HX 6008 is an extremely high efficient next generation nonionic synthetic associa-

tive thickener for water-borne systems that

Provides excellent high shear rate viscosity build (ICI) with additional low and mid-shear

contribution

Provides savings up to 60% of the amount of thickener depending on the latex chemistry

Reduces complexity in formulation and production

Can help to reduce the number of raw material in the portfolio

Has less adverse effects on paint film properties or can even improve them

Has an EU Ecolabel confirmation readily available

RHEOLATE® HX 6008 performance summary