Patent ID: 9718984
Date: 2017-08-01
CPC Classifications: B01F,C09B,C09D

Claim:
1. A dispersant for use at the interface between an organic medium and a particulate solid, said dispersant comprising a surface active reaction product of a polyether functionalized polyacid reacted with an aminic polybasic species and salts thereof, wherein said polyether functionalized polyacid species comprises a polyacid portion of 10 to 500 repeat units, wherein at least 45 mole % of said repeat units are derived from free radically polymerizable unsaturated monomers with one or more carboxylic acid groups, said polyacid portion comprising at least two free acid groups selected from the types consisting of a carboxylic acid, salt of a carboxylic acid, anhydride of a dicarboxylic acid, acid from phosphorus, and acid from sulfur, and said repeat units being derived from free-radically polymerizing monomers that had contained a polymerizable carbon-to-carbon double bond, wherein said polyether functionalized polyacid comprises two or more polyether segments with an oxygen or aminic group (J) near a terminus of the polyether and connected to said polyacid portion via ester, amide, and/or imide linkages, wherein said two or more polyether segments comprises a polyether segment of the Q′ type having the formula -J-(C wherein the number ratio of said acid groups of said polyacid to carbonyl groups in the form of an ester, amide or imide type functionalized with G′ type polyether segments to carbonyl in the form of an ester, amide, or imide type functionalized with Q′ type polyether segments is 20-90:0-35:5-80 wherein the amount of Q′ is further defined as the sum of variables Q wherein said aminic polybasic species comprises a polyamine that is linear or branched having a molecular weight from about 140 to 100,000 g/mole; wherein said reaction product includes two or more ionic and/or covalent bonds between said polyether functionalized polyacid and said aminic polybasic species and the weight ratio of the polyether functionalized polyacid to the aminic polybasic species is from 1:1 to 35:1.