Fractionable, elastomeric poly (1-butene)

Details Fractionable, elastomeric poly (1-butene) Fractionable, elastomeric poly (1-butene)

1980-03-11

1981-11-03

Levin, Stanford M.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

260 332R, 260 336A, 525191, 525240, 526 96, 526113, 526118, 526130, 526154, 5263482, C08F 1008, C08F 1014

Patent

active

042987229

ABSTRACT:
A fractionable, elastomeric polymer of 1-butene consisting essentially of 30% to 80%, by weight, of an ether-soluble fraction having an intrinsic viscosity exceeding 1.5 and an infrared crystallinity value of about 1% to 15%; and 20% to 70%, by weight, of an ether-insoluble fraction having an infrared crystallinity value of about 20% to 55%; said polymer having an nmr isotacticity of about 20% to 50% and an intrinsic viscosity exceeding 1.5; elastomeric copolymers of 1-butene; polymer blends containing said elastomeric polymers; and a catalytic process for making said elastomeric polymers.

REFERENCES:
patent: 3175999 (1965-03-01), Natta et al.
patent: 3197452 (1965-07-01), Natta et al.
patent: 3894120 (1975-07-01), Frese et al.
patent: 3932307 (1976-01-01), Setterquist
patent: 3950269 (1976-04-01), Setterquist

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