Preparation of oxyalkylated, carboxyl-containing polymers

Details Preparation of oxyalkylated, carboxyl-containing polymers Preparation of oxyalkylated, carboxyl-containing polymers

C - Chemistry, Metallurgy

08

F

402/518

C08F 8/14 (2006.01)

Patent

CA 1330611

Abstract of the Disclosure: Oxyalkylated, carboxyl- containing polymers are prepared by reacting (A) a polymer which contains one or more monoethyleni- cally unsaturated C3-C8-carboxylic acids as copoly- merized units with (B) an alkylene oxide in an aqueous medium at not more than 120°C by a process in which the reaction is started at a pH of from 5.0 to 5.9 and is ended after a pH of from 5.5 to 8.5 has been reached. As a result of monitoring of the pH, the selec- tivity of the addition reaction of alkylene oxides with the polymers (A) is substantially improved compared with known processes.

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