초록

Pulverulent adhesives comprise a redispersible polymer powder based on a polymer which can be obtained in the presence of a protective colloid, and additionally comprise a filler, an alkaline additive and, if desired, an emulsifier and other additives.

대표청구항 ▼

[ We claim:] [1.] A pulverulent adhesive for flooring adhesive, carpeting adhesive or tile adhesive comprising:a) from 5.0 to 98% by weight of a redispersible polymer powder,b) from 1 to 94.9% by weight of at least one filler,c) from 0.1 to 10% by weight of at least one alkaline additive, andd) from

[ We claim:] [1.] A pulverulent adhesive for flooring adhesive, carpeting adhesive or tile adhesive comprising:a) from 5.0 to 98% by weight of a redispersible polymer powder,b) from 1 to 94.9% by weight of at least one filler,c) from 0.1 to 10% by weight of at least one alkaline additive, andd) from 0 to 10% by weight of at least one emulsifier, d redispersible polymer powder having been prepared by a process consisting essentially ofpolymerizing by free radical aqueous emulsion polymerization a mixture M comprising at least one ethylenically unsaturated monomer selected from the group consisting of ester of .alpha.,.beta.-monoethylenically unsaturated mono or dicarboxylic acids with alkanols of 1 to 8 carbon atoms, vinyl aromatic compounds ethylene, butadiene, and mixtures thereof and at least one water-soluble comonomer which contains acid groups selected from the group consisting of acrylic, methacrylic, maleic, fumatic, itaconic crotonic acid and or mixtures thereof, in the presence of at least one starch degradation product having a weight average molecular weight of from 2500 to 25,000, as protective colloid to form an aqueous dispersion of a polymer which has a glass transition temperature of .ltoreq.-10.degree. C. drying said aqueous polymer dispersion at a pH of 1 to 7 wherein the composition M comprises by weight,50 to 99.9% of the ethylenically unsaturated monomer,0.1 to 15% of water-soluble monomer, and5-40% of the starch degradation product.