Patent ID: 6372842
Filing Date: 2002-04-16
Classification: C09D,C09K,C10M

Abstract:
A method of imparting aerosol control and shear stability to a first composition comprising incorporating therein an aqueous composition or dispersion comprising about 1 to about 5000 parts per million of a water-soluble or water-dispersible synthetic polymer formed by polymerizing(A) a hydrophobic monomer selected from the group consisting of A(I) an alkyl substituted acrylamide compound having the formula: â€ƒwherein R1 is a hydrogen or a methyl group and R2 and R3 are independently hydrogen or hydrocarbyl groups, provided that the total number of carbon atoms in R2 and R3 combined is between 4 and 36, and A(II) an acrylate ester of the following formula: â€ƒwhere R1 is a hydrogen or a methyl group and R9 is a hydrocarbyl group containing between 1 and 20 carbon atoms; and (B) a hydrophilic monomer selected from the group consisting of B(I) acrylamido sulfonic acids having the formula: â€ƒwherein R4 is a hydrogen or a methyl group and R is an aliphatic or aromatic hydrocarbon group containing from 2 to 12 carbon atoms; B(II) acrylamido disulfonic acids having the formula: â€ƒwherein R4 is a hydrogen or a methyl group and R is an aliphatic or aromatic hydrocarbon group containing from 2 to 8 carbon atoms, and B(III) a styrene sulfonic acid having the formula: â€ƒwherein R4 is a H or a methyl group, and X+ is H or a cation selected from the group consisting of alkali metal cations, alkaline earth cations, cations of the transition metals: Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, and ammonium cations of the following formula: R5R6R7R8N+â€ƒwherein R5, R6R7, and R8 are independently hydrogen or hydrocarbyl groups, provided that the total number of carbon atoms in an ammonium cation does not exceed 21 carbon atoms, and further provided that if A is A(I), then the ratio of moles of A to B is from about 95:5 to about 1:99, and if A is A(II), then the ratio of moles of A to B is from about 75:25 to about 1:99, whereby said first composition retains effective aerosol control properties even after it is subjected to a shear rate of from about 99,000 to about 1,000,000 sâˆ’1, and a shear stress of from about 30,000 pascals to about 500,000 pascals.