Process for production of chlorinated ethylene-propylene copolym

Details Process for production of chlorinated ethylene-propylene copolym Process for production of chlorinated ethylene-propylene copolym

1991-12-11

1995-11-14

Michl, Paul R.

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

Synthetic resins

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

525263, 5253341, 525356, 525358, 525368, 525369, 524201, 524211, 524424, 524425, 524430, C08F 834

Patent

active

054667577

ABSTRACT:
A chlorinated ethylene-propylene copolymer having a chlorine content of 20 to 45% by weight and a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 10 to 150 is produced by chlorinating in two or three stages, by contact with chlorine gas in an aqueous suspension, an ethylene-propylene copolymer having a propylene content of 15 to 40% by weight, a melt flow index of 0.01 to 5.0 g/10 minutes, a melting peak as measured by differential scan calorimeter (DSC) of 80.degree. C. or more, a crystallinity as measured by X-rays of 3% or more, an index M.sub.W /M.sub.N of the distribution of molecular wieght, determined by gel permeation chromatography (GPC), of greater than 4, and a Mooney visocisty (ML.sub.1+4, 100.degree. C.) of 10 to 180.
A vulcanizable composition having superior physical properties may be obtained by formulating with (A) the chlorinated ethylene-propylene copolymer, (B) a thiourea compound, (C) sulfur and/or a sulfur donor, (D) a metal compound, and further, if necessary, (E) a dicarbamate or (F) a mercaptotriadizine compound. Further, a cross-linkable composition having superior physical properties may be obtained by formulating (A) the chlorinated ethylene-propylene copolymer with (G) an organic peroxide.

REFERENCES:
patent: 2416069 (1947-02-01), Scott
patent: 3303172 (1967-02-01), Schreiber
Chemical Abstracts, vol. 91, No. 12, Sep. 1979, p. 56, Abstract 92732c.
Chemical Abstracts, vol. 101, No. 20, Nov. 1984, p. 76, Abstract No. 172840u.
Chemical Abstracts, vol. 100, No. 12, Mar. 1984, p. 63, Abstract No. 87032s.
Chemical Abstracts, vol. 100, No. 12, Mar. 1984, p. 63, Abstract No. 87035v.
Chemical Abstracts, vol. 100, No. 8, Feb. 1984, p. 17, Abstract No. 52244k.

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