Patent ID: 6689818
Filing Date: 2004-02-10
Classification: C09D,Y10S

Abstract:
A dispersant composition comprising(A) 20 to 80% by weight of at least one acetylene glycol selected from acetylene glycols of the formula (1): wherein R1 and R2 each are a C1-5 alkyl group, and ethoxylated acetylene glycols of the formula (2): wherein R1 and R2 each are a C1-5 alkyl group, m and n each are a positive number of 0.5 to 25, and m+n is 1 to 40, and(B) 20 to 80% by weight of a graft product of an allyl alcohol-maleic anhydride-styrene copolymer with a polyoxyalkylene monoalkyl ether, comprising (a) polyoxyalkylene monoalkyl ether units of the formula (3): wherein R3 is a C1-5 alkyl group and p is a positive number of 5 to 50, (b) maleic anhydride units, and (c) styrene units, in a compositional ratio a:b:c of 25-40:25-40:25-40 in mole percent, the graft product having a weight average molecular weight of 1,000 to 50,000.