C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/332
C08F 236/18 (2006.01)
Patent
CA 1279149
TITLE HEAT RESISTANT CHLOROPRENE COPOLYMERS ABSTRACT OF THE DISCLOSURE Mercaptan, dialkyl xanthogen disulfide or sulfur modified chloroprene based copolymers are disclosed. At least 92% of the chloroprene derived units present in the copolymer have a 1,4-trans configuration. The copolymer comprises units derived from chloroprene, up to 20 parts and preferably 2 or more parts per 100 parts chloroprene derived units of units derived from 2,3-dichloro-1,3-butadiene, and 2 to 25 parts per 100 parts of chloroprene and 2,3-dichlorobutadiene of randomly distributed units derived from styrene; -methyl styrene; acrylonitrile; methacrylonitrile; acrylic acid; methacrylic acid; maleic acid; fumaric acid; and lower alkyl acrylamides, methacrylamides, acrylates, methacrylates, maleates or fumarates. The resultant polychloroprenes have improved heat resistance and therefore, an extended useful life of the article when used in an environment in which it is subject to high temperatures. The polychloroprenes are useful in hoses and power transmission belts of all sorts including V-belts, multigroove belts, synchro-cog, CTV etc. in automotive, industrial and agricultural areas.
521803
E.i. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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