| 主权项 |
1. A composition comprising particulate solid selected from a pigment and a filler, an organic medium selected from a plastics material and an organic liquid and a polyacrylic copolymer comprising the general formula;
—[CH2—C(A)(R1)]j—[CH(A)-C(R1)(A)]k—wherein;
j and k are the average number of repeating units within the graft copolymer, j is 3 or greater; k is 1 or greater; R1 is H or —CH3; A is independently B, D, E or F, whereby; B is —CO2H; D is —CO2-Q; E is —CO—X-T; F is —COO−Y+; Q is —[(CHR5)1CO2]m—[CH2CH2O]n—R2 R2 is a C1-C25 branched or non-branched alkyl; l is between 1-10; m is between 1-10; n is 0-10; R5 is H, —CH3 or —C(CH3)3 or a mixture thereof; X is O— or NH— T is —(CHR3—CH2O)p—R4 R3 is independently H, —CH3 or —CH2CH3 or a mixture thereof; p is 3-45, R4 is a C1-C25 alkyl; and Y is an alkali metal, an alkaline earth metal, an ammonium salt derived from ammonia, an amine or alkanolamine or a mixture thereof, wherein said copolymer has at least one repeat unit where A=B, at least one repeat unit where A=D, and at least one repeat unit where A=F. |
