Process

Claim 1

A PROCESS FOR THE MANUFACTURE OF DRY, FREE-FLOWING, WATER REDISPERSIBLE POWDERS, COMPRISING (A) THE THOROUGH BLENDING, BY MENAS OF A DOUGH MIXER, OF (1) 40 TO 1000 PARTS BY WEIGHT OF AN INSOLUBLE WATER DISPERSIBLE INORGANIC PARTICULATE SOLID SELECTED FROM THE GROUP CONSISTING OF PIGMENTS, PIGMENT EXTENDERS, PORTLAND CEMENTS, PLASTER OF PARIS, LIM,E SILICATES AND MIXTURES THEREOF; (2) 0.1 TO 5 PARTS OF A SURFACE ACTIVE AGENT SELECTED FROM THE GROUP CONSISTING OF TERTIARY AMINES, SODIUM SALTS OF SULFOSUCCINIC ACIDS, ALKYL ARYL SULFONIC ACIDS AND CONDNESED SULFONIC ACIDS, CONDENSATES OF FATTY ACIDS WITH ETHYLENE OXIDE, POLYETHOXYLATED ALKYL AND ARYL ALXOHOLS, AND POLYOXALKELENE GLYCOLS; (3) UP TO 30% OF THE PARTICULATE INORGANIC SOLID WEIGHT OF A HIGH BOILING WATER DISPERSIBLE ORGANIC LIQUID SELECTED FROM THE GROUP CONSISTING OF G LYCOLS, GLYCOL ETHRS, ESTERS OF GLYCOL ETHERS, PHTHALATE ESTERS, PHOSPHATE ESTERS, CITRATE ESTERS, CHLORINATED BIPHENYLS, POLYESTERS AND MIXTURES THEREOF; (4) 0.4 TO 25 PARTS OF A HYDROPHILIC COLLOID THICKENER SELECTED FROM THE GROUP CONSISTING OF BORATED ALGINATES, METHYL CELLULOSE, CARBOXYMETHYL CELLULOSE, HYDROXYETHYL CELLULOSE, GUAR GUM, METHYLATED GUAR GUM AND POLYVINYL ALCOHOL; AND (B) SIFTING IN AND THOROUGHLY BLENDING WITH THE RESULTANT MIXTURE, 100 PARTS OF A DRIED PARTICULATE WATER REDISPERSIBLE POLYVINYL ESTER EMULSTION WHEREIN THE POLYVINYL ESTER IS SELECTED FROM THE GROUP CONSISTING OF POLYMERS OF VINYL ESTERS OF ORGANIC ACIDS CONTAINING FROM 2 TO 7 CARBON ATOMS AND COPOLYMERS OF VINYL ACETATE WITH COMPATIBLE MONOETHYLENICALLY UNSATURATED MONOMERS.