Patent ID: 6100225
Filing Date: 2000-08-08
Classification: C10M,C10N

Abstract:
A method for reducing mist formation in a high shear aqueous system which involves application of an aqueous composition to said high shear system, comprising: including in said aqueous composition, a copolymer formed by copolymerizing(A) a hydrophobic monomer selected from the group consisting ofA(I) an alkyl substituted acrylamide compound represented by the formula: ##STR12## wherein R.sub.1 is a hydrogen or a methyl group and R.sub.2 and R.sub.3 are independently hydrogen or hydrocarbyl groups, provided that the total number of carbon atoms in R.sub.2 and R.sub.3 combined is 2 to 36; andA(II) an acrylate ester represented by the formula: ##STR13## where R.sub.1 is a hydrogen or a methyl group and R.sub.9 is a hydrocarbyl group containing 1 to 20 carbon atoms; and(B) a hydrophilic monomer selected from the group consisting ofB(I) an acrylamido sulfonic acid represented by the formula: ##STR14## and salts thereof, wherein R.sub.4 is a hydrogen or a methyl group and R is an aliphatic or aromatic hydrocarbon group containing 2 to 8 carbon atoms; andB(II) an acrylamido disulfonic acid represented by the formula: ##STR15## and salts thereof, wherein R.sub.4 is a hydrogen or a methyl group and R is an aliphatic or aromatic hydrocarbon group containing 2 to 8 carbon atoms; andB(III) a styrenic sulfonic acid represented by the formula: ##STR16## and salts thereof, wherein the salts are selected from the group consisiting of alkali metal salts, alkaline earth metal salts, salts of the metals Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn, and ammonium salts, wherein the ammonium ion is represented by the formulaR.sub.5 R.sub.6 R.sub.7 R.sub.8 N.sup.+where R.sub.5, R.sub.6, R.sub.7, and R.sub.8 are independently hydrogen or hydrocarbyl groups;provided that the total number of carbon atoms in said ammonium ion does not exceed 21; andfurther provided that if A is A(I) then the ratio of moles of A to B is in the range of 95:5 to 25:75; and if A is A(II), then the ratio of moles of A to B is in the range of 90:10 to 25:75.