Fact Sheet L-XS 32

ANTI-TERRA-250

Controlled Flocculating Wetting and Dispersing Additive

for Water-borne Systems

Water-borne coating systems containing inorganic pigments and extenders tend to settle and separate. Commonly used deflocculating additives achieve a perfect stabilization of pigments but settling tendency normally increases. However, controlled flocculating

additives like ANTI-TERRA-203 and ANTI-TERRA-204, which were developed years ago for solvent-borne paints, stabilize pigments as well but also provide an additional benefit, namely improved anti-settling properties. These controlled flocculating additives

form a network via hydrogen bonds, modify the rheology profile and form a yield point. To comply with the requirements of recent water-borne formulations, BYK transferred the successful concept of controlled flocculating additives and designed the logical successor – ANTI-TERRA-250.

Your benefits• Reduced settling of inorganic pigments/fillers due to controlled flocculation• No flooding and floating

Mode of Action

Controlled Flocculation

• Pigment stabilization through

network formation

• The network via hydrogen bondings

formed by association between

additive molecules prevents settling

of inorganic pigments

figure 1

Application Fields of ANTI-TERRA-250

ArchitecturalCoatings

IndustrialCoatings

ProtectiveCoatings

AutomotiveCoatings

ANTI-TERRA-250 X X X y

X recommended y suitable figure 2

Vis

cosi

ty in

cP 18000

16000 14000 12000 10000 8000 6000 4000 2000 0

10 rpm 20 rpm5 rpm 50 rpm 100 rpm

Speed [rpm]

Viscosity Profile of ANTI-TERRA-250 Compared to Deflocculating Additives

X Control X ANTI-TERRA-250 X Standard Deflocculating Additive figure 3

X Standard Polyacrylate

• Improved color acceptance and resulting ΔE values• Higher spreading index in self leveling epoxy floorings

3

2.5

2

1.5

1

0.5

0

12.8 cm

Fact Sheet L-XS 32

Interior Flat Emulsion Paint based on Acrylic-emulsion, Paint/Blue colorant 97:3 figure 5

High Spreading Index in a Flooring System

Self leveling epoxy flooring; test method: 70 g material, punctiformly applied, diameter in cm figure 6

Excellent Anti-settling Properties in an Aqueous Primer System

Water-reducible primer based on alkyd – 3 months at room temperature figure 4

StandardPolyacrylate

StandardDeflocculating

Additive

ANTI- TERRA-250

Competitor 1 Competitor 2

Perfect Color Acceptance in an Emulsion Paint

X DE Rub X DE Roll X DE Brush

Na-PolyacrylateANTI-TERRA-250 NH4-Polyacrylate Standard Deflocculating Additive

ANTI-TERRA-250 Deflocculating Additive Deflocculating + Thixotropic Additive

12.5 cm10.5 cm

DE

ANTI-TERRA®, ATEPAS®, BYK®, BYK®-DYNWET®, BYK®-SILCLEAN®, BYKANOL®, BYKETOL®, BYKOPLAST®, BYKUMEN®, DISPERBYK®, DISPERPLAST®, ISAROL®, LACTIMON®, NANOBYK®, SILBYK® and VISCOBYK® are registered trademarks of BYK-Chemie. AQUACER®, AQUAMAT®, AQUATIX®, CERACOL®, CERAFAK®, CERAFLOUR®, CERAMAT®, CERATIX® and MINERPOL® are registered trademarks of BYK-Cera. LICOMER® is a registered trademark of Clariant.

This information is given to the best of our knowledge. Because of the multitude of formulations, production, and application conditions, all the above-mentioned statements have to be adjusted to the circumstances of the processor. No liabilities, including those for patent rights, can be derived from this fact for individual cases. This brochure replaces all previous issues – printed in Germany.

BYK-Chemie GmbHP.O. Box 10 02 45 46462 WeselGermanyTel +49 281 670-0 Fax +49 281 65735

info@byk.comwww.byk.com/additives

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