US 5,314,950 AGranted

Heat resistant resin composition comprising polymers of N-(substituted) maleimides and improved process for the preparation of said maleimides

AssigneeCytec Technology Corp.

InventorsBalwant Singh, Robert J. Tynik

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Abstract

Novel resin compositions are provided which possess excellent heat resistance and thermal color stability, alone, or in admixture with bulk resins. The claimed resin compositions comprise homo- and/or copolymers of N-(2,3-dimethylphenyl) maleimide, alone, or in further combination with resins composed of copolymer components, such as vinyl copolymers and rubber-grafted vinyl copolymer resins. The resin compositions have improved heat resistance and produce molded articles with desirably light colors. Also provided is an improved process to make maleimide monomers by using selected polar solvents whereby the amount of uncyclizable trans-amic acid is held at tolerable levels and the desired maleimide is obtained in high yields, free from by-products.

Claims10

Dependent claims

A heat resistant, compatible resin composition comprising:

(a) a homopolymer of N-(2,3-dimethylphenyl)maleimide;
and
(b1) a copolymer prepared by copolymerizing one or more monomers selected from the group consisting of aromatic monoalkenyl monomers, vinyl cyano monomers, alkylester monomers of acrylic acid, alkylester monomers of methacrylic acid, vinyl halide monomers and vinyl alkylester monomers
(b2) a graft copolymer prepared by copolymerizing (i) a rubbery polymer, (ii) N-(2,3-dimethylphenyl) maleimide, and (iii) one or more monomers selected from the group consisting of aromatic monoalkenyl monomers, vinyl cyano monomers, alkylester monomers of acrylic acid, alkylester monomers of methacrylic acid, vinyl halide monomers and vinyl alkylester monomers;
or
(b3) a mixture of (b1) and (b2),
wherein said homopolymer component (a) and said copolymer component (b) (1, 2 or 3) are present in a ratio of 5:95 to 95:5 parts by weight in the resin composition.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/007,225Filed 22 Jan 1993
Granted: 24 May 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

C08L 35/00
Compositions of homopolymers or copolymers of compounds having one or more unsaturated
C08L 35/06
Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon…:…
C08L 51/04
Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds ;…:…
C08L 2201/08
Properties: stabilised against heat, light or radiation or oxydation