Process for preparing methacrylimide-containing polymers

Details Process for preparing methacrylimide-containing polymers Process for preparing methacrylimide-containing polymers

C - Chemistry, Metallurgy

08

F

402/518

C08F 8/32 (2006.01) C08F 20/52 (2006.01)

Patent

CA 1277095

PROCESS FOR PREPARING METHACRYLIMIDE-CONTAINING POLYMERS ABSTRACT OF THE DISCLOSURE Methacrylimide-containing polymers are continuously produced by introducing 10 to 60 wt.% of an inert solvent, 90 to 40 wt.% of methacrylic acid, a methacrylic acid ester or a monomer mixture comprising at least 50 wt.% of methacrylic acid or a methacrylic acid ester, and a radical polymerization initiator and a molecular weight modifier into a polymerization reaction zone, converting at least 80 wt.% of the charged monomer to a polymer at 60 - 170°C, adding a compound represented by the formula: R-NH2 wherein R represents a hydrogen atom, an alkyl group having 1 - 12 carbon atoms, a cycloalkyl group having 7 - 11 carbon atoms or an aryl group having 6 - 10 carbon atoms, to the polymerization reaction liquid, carrying out reaction of the resulting mixture at 150 to 300°C in an imidization reaction zone, and finally separating volatile substances from the reaction liquid.

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