Thermoplastic elastomers based upon chlorinated polyethylene and

Details Thermoplastic elastomers based upon chlorinated polyethylene and Thermoplastic elastomers based upon chlorinated polyethylene and

1989-12-11

1990-12-18

Seccuro, Carman J.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525192, 525194, 525197, 524528, C08L 2326, C08L 2328

Patent

active

049787160

ABSTRACT:
Thermoplastic vulcanizates are prepared by curing, at least partially by dynamic vulcanization, blends of chlorinated polyethylene and crystalline thermoplastic polymers such as polypropylene. Inclusion of a plasticizing material or extender oil, e.g. trioctyl trimellitate, enhances softness and oil resistance of the blends. Vulcanizing materials include a basic material, normally added with the chlorinated polyethylene, and (1) a derivative of 2,5-dimercapto-1,3,4-thiadiazole or (2) a combination of 2,5-dimercapto-1,3,4-thiadizaole and an activator material such as an amine having a boiling point of 110.degree. C. or higher and a pk value less than 4.5.

REFERENCES:
patent: 4128510 (1978-12-01), Richwine
patent: 4141878 (1979-02-01), Coran et al.
patent: 4288576 (1981-09-01), Richwine
patent: 4503192 (1985-03-01), McShane et al.
Coran et al, "Rubber-Thermoplastic Compositions", Part 5, Selecting Polymers for Thermoplastic Vulcanization, 1981, vol. 55-Rub. Chem. & Tech., pp. 116-136.
"Materials and Compounding Ingredients for Rubber", 5/75-Rubber World, p 179.

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