Bermocoll CST 291
Ethyl hydroxyethyl cellulose
Akzo Nobel
流变调整器/增稠 >> 有纤维质,非联合 >> 羟基乙烷纤维素 (HEC)
Rheology Modifier/ Thickener >> Cellulosic, non associative >> Hydroxyethyl cellulose (HEC)
涂层 >> 水生
Coatings >> Waterborne
BERMOCOLL CST 291 is a non-ionic, water soluble
cellulose ether. It improves the consistency,
the stability, and the water retention of water
based products.
Specifications
BERMOCOLL CST 291 is a low viscosity grade
of ethyl hydroxyethyl cellulose.
Physical data
Appearance Particle size Water content whitish powder 98 % < 425 µm max 5 %
Characteristics of aqueous solutions
pH (1 % solution) Surface activity Viscosity at 20°C (Brookfield LV) 2 % solution neutral weak 2,200 ± 450 mPa.s
Applications
BERMOCOLL CST 291 is used for thickening and
stabilizing effects in latex paints. Normal
dosage is 0.4 - 0.8 % calculated on the total
weight.
BERMOCOLL CST 291 is easily dispersed in cold water
of pH 7 of less. BERMOCOLL CST 291 can form lumps
when added to an alkaline liquid.
To avoid this, it should be added as a ready stock
solution, as a slurry in slightly acid water or in
an organic solvent, or as a dry mix with other
powder materials.
The dissolving time after dispersion is
influenced by the water pH. Alkaline additives
can be used to speed up the dissolving process.
Non-ionic, Low viscosity grade of ethyl hydroxyethyl cellulose. Improves the consistency, the stability, and the water retention of water based products. .Weak surface activity. Can be used for thickening and stabilizing effects in latex paints.
Recommended usage level : 0.4 - 0.8 % calculated on the total weight. Easily dispersed in cold water of pH 7 of less. Can form lumps when added to an alkaline liquid. To avoid this, it should be added as a ready stock solution, as a slurry in slightly acid water or in an organic solvent, or as a dry mix with other powder materials. The dissolving time after dispersion is influenced by the water pH. Alkaline additives can be used to speed up the dissolving process.