Patent ID: 6596816
Filing Date: 2003-07-22
Classification: B01F,C08F,C09D

Abstract:
A dispersing agent for pigments or extenders comprising comprising an acrylic ester-acrylamide polymer having a weight average molecular weight of 1,000 to 50,000, comprising aminolysing an acrylic acid alkyl ester polymer with at least one amine, wherein the acrylic acid alkyl ester polymer is a polymer of acrylic acid alkyl ester monomer alone or with one or more additional monomers selected form the group consisting of itaconic acid ester, maleic acid ester, (meth)acrylic acid ester, (meth)acrylic acid, styrene, alkyl vinyl ether and vinyl acetate, and the amine is selected from the group consisting of; amines of the formula NH2â€”R1â€”NR2R3, wherein R1 is a divalent alkylene radical of 2-4 carbon atoms and R2 and R3 are aliphatic or alicyclic alkyl radicals of 1-12 carbon atoms which can be the same or different;wherein at least part of the ester groups of the acrylic ester-acrylamide polymer are transesterified with at least one long chain alcohol selected from the group consisting of oleyl alcohol, stearyl alcohol, benzyl alcohol, methoxy polyethylene glycol, butyl triglycol, and allyl polyether.