Copolymers of styrene and maleic acid anhydride/half ester

Details Copolymers of styrene and maleic acid anhydride/half ester Copolymers of styrene and maleic acid anhydride/half ester

C - Chemistry, Metallurgy

08

F

402/309, 261/56.

C08F 8/14 (2006.01) C04B 24/24 (2006.01)

Patent

CA 1337005

The present invention discloses organic copolymers in free acid or salt form containing recurring units of formula I Image I in which R is an C2-6 alkylene radical, R1 is a C1-20 alkyl-, C6-9 cycloalkyl- or phenyl group, x,y and z are numbers from 0.01 to 100, m is a number from 1 to 100, n is a number from 10 to 100, with the provisos, that i) the ratio of x to (y+z) is from 1:10 to 10:1 inclusive, ii) the ratio of z:y is from 3:1 to 100:1, and iii) m + n = 15-100. The organic copolymers are excellent surfactants and can also be used as additives in cementitious mixes.

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