Thermostable vinylchloride mixed polymers

Details Thermostable vinylchloride mixed polymers Thermostable vinylchloride mixed polymers

2005-09-06

2010-02-02

Cheung, William K (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S266000, C526S317100, C526S319000, C526S344000

Reexamination Certificate

active

07655741

ABSTRACT:
A process for the preparation of vinyl chloride copolymers involves free radical suspension polymerization or emulsion polymerization of a mixture of vinyl chloride, epoxide-containing vinyl monomers and further comonomers copolymerizable therewith, whereina) from 49.5 to 90% by weight of vinyl chloride,b) from 0.01 to 0.7% by weight of epoxide-containing vinyl monomers andc) from 9.5 to 50% by weight of further comonomers copolymerizable with a) and b) are polymerized, the data in % by weight totaling 100% by weight, and from 0.001 to 0.1% by weight of one or more aliphatic or alicyclic, saturated or unsaturated dicarboxylic acids having 1 to 10 carbon atoms, or aliphatic and alicyclic, saturated and unsaturated hydroxymono-, hydroxydi- and hydroxytricarboxylic acids having 3 to 10 carbon atoms and 1 to 4 hydroxyl groups are added during or after the polymerization, and the vinyl chloride copolymer is isolated as a solid resin.

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Derwent Abstract corresponding to EP 1 153 979 [An 2002-099044].
Derwent Abstract corresponding to EP 0 358 067 [An 1990-076827].
English Abstract corresponding to JP 11-100485.
English Abstract corresponding to JP 11-511195.
English Abstract corresponding to JP 11-140-256.
English Abstract corresponding to JP 10-168104.
English Abstract corresponding to JP 07-278209.
English Abstract corresponding to JP 03-086744.
English Abstract corresponding to JP 05-202255.
English Abstract corresponding to JP 45-038260.
English Abstract corresponding to JP 57-108140.
English Abstract corresponding to JP 10-182909.
English Abstract corresponding to JP 2001-139698.
English Abstract corresponding to JP 60-238306.
English Abstract corresponding to JP 62-181319.

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