Chemical modification of (meth) acrylic acid homopolymers...

Details Chemical modification of (meth) acrylic acid homopolymers... Chemical modification of (meth) acrylic acid homopolymers...

C - Chemistry, Metallurgy

08

F

402/322

C08F 8/36 (2006.01)

Patent

CA 1239743

ABSTRACT OF THE DISCLOSURE The invention comprises a method of preparing copolymers of acrylamido sulfonic acids which comprises converting to acrylamido sulfonic groups at least 5 mole % of the acrylic acid or methacrylic acid groups in a polymer which contains at least 5 mole % of these monomers in its structures by reacting an aqueous solution of the acrylic acid or methacrylic acid polymer with an amino sulfonic acid under pressure at a temperature of at least 70°C for a period of time sufficient to convert at least 5 mole % of the acrylic acid or methacrylic acid groups in the polymer to amido sulfonic acid groups corresponding to the starting amino sulfonic acid.

523520

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