Propylene copolymers

Details Propylene copolymers Propylene copolymers

1980-05-23

1981-12-29

Levin, Stanford M.

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

Synthetic resins

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

260 336PQ, 260 338UA, 525247, 526 82, 5263482, 5263483, 5263486, C08F21014, C08F29300

Patent

active

043083617

ABSTRACT:
A copolymer of propylene and a straight-chain .alpha.-olefin of 5 to 12 carbon atoms is characterized in that: its intrinsic viscosity is 0.3 to 15 dl./g. (at 135.degree. C., in decalin); it contains 3 to 30 percent by weight of the .alpha.-olefin; and when it is subjected to successive extraction with o-dichlorobenzene at 40.degree. C. and 80.degree. C., the quantities, fusion peak temperatures, and content of the .alpha.-olefin of the resulting fractions are respectively within specific limits of values. A preferred copolymer contains about 0.5 to 50 percent of a propylene homopolymer block and about 99.5 to 50 percent of a random copolymer block of propylene and a straight chain .alpha.-olefin having 5 to 12 carbon atoms.

REFERENCES:
patent: 3732335 (1973-05-01), Hermans et al.
patent: 3888949 (1975-06-01), Shih
patent: 3954697 (1976-05-01), McConnell et al.
patent: 4210570 (1980-07-01), Trotter et al.

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