POLY(ACETAL-POLYETHER) AQUEOUS DISPERSIONS AND USE THEREOF IN PROTECTIVE COATINGS Russian patent published in 2010 - IPC C08K5/06 C08L59/00 C08L71/00 C09D5/00 C09D7/12 

FIELD: chemistry.

SUBSTANCE: invention relates to an aqueous dispersion of an associative thickener used to regulate rheological properties when applying various aqueous systems. The aqueous polymer dispersion contains a hydrophobically modified poly(acetal- or ketal-polyether) (HM-PAE), water, and a viscosity reduction agent selected from a group which includes ethoxylated alcohol containing a C₉-C₁₂-hydrocarbon fragment, ethoxylated acetylenediol, phosphate ether, a combination of ethoxylated alcohol and anionic dialkylsulfosuccinate and a combination of ethoxylated alcohol and anionic phosphate ether.

EFFECT: invention enables to obtain a thickener which easily bonds with water-based coating compositions, including those which contain latex and enables reduction of the viscosity of a 20% HM-PAE mixture to 1000-6000 cP.

46 cl, 4 tbl, 27 ex, 3 dwg