Ethylene-propylene rubbery copolymer

Details Ethylene-propylene rubbery copolymer Ethylene-propylene rubbery copolymer

1977-05-17

1978-11-14

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252431R, 526281, 526282, 526283, 526308, 526336, 526348, C08F 3208, C08F 3620, C08F21016, C08F21018

Patent

active

041256999

ABSTRACT:
A linear ethylene-propylene random rubbery copolymer composed of 78 to 85 mole% of an ethylene unit and 15 to 22 mole% of a propylene unit and having a Mooney viscosity (ML.sub.1+4, 100.degree. C) of 30 to 50 and a molecular weight distribution corresponding to a Q value of 3.5 to 5.5. The rubbery copolymer may further contain a nonconjugated diene unit in an amount of 4 mole% or less based on the total amount of the ethylene, propylene and nonconjugated diene units. The ethylene-propylene copolymer or ethylene-propylene-nonconjugated diene copolymer affords a cable coating material having improved processability, and when blended with polyethylene or polypropylene, gives a blend having good flowability.

REFERENCES:
patent: 3173903 (1965-03-01), Lukach et al.
patent: 3457244 (1969-07-01), Fukuda et al.
patent: 3595842 (1971-07-01), Schrage et al.
patent: 3674755 (1972-07-01), Yamamoto et al.
patent: 3684782 (1972-08-01), Longi et al.
patent: 3725364 (1973-04-01), Wagensommer et al.

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