Molding elastomeric composition

Details Molding elastomeric composition Molding elastomeric composition

1987-04-02

1988-10-04

Seccuro, Carman J.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

525 89, 525 98, C08L 5300, C08L 5302, C08L 2316

Patent

active

047757116

ABSTRACT:
A molding elastomeric composition having superior flexibility, high-impact properties, high mechanical strengths (particularly, flexural modulus), good moldability (particularly, mold-release characteristics) and appearance of the resulting molded products is provided, the composition being obtained (a) by blending a specified proportion of a specified hydrogenated styrene-butadiene-styrene block copolymer having a specified solution viscosity, with a propylene copolymer of a propylene-ethylene block copolymer (I) with a crystalline propylene-ethylene random copolymer (II) in a specified blending ratio; or (b) by blending the specified proportion of the hydrogenated material and a specified proportion of a non-crystalline ethylene-.alpha.-olefin random copolymer with the propylene copolymer of (I) with (II); or (c) by blending a specified proportion of the propylene copolymer of (I) with (II), a specified proportion of the hydrogenated material, a specified proportion of the non-crystalline ethylene-.alpha.-olefin random copolymer and a specified proportion of a higher fatty acid amide.

REFERENCES:
patent: 3299174 (1967-01-01), Kuhre et al.
patent: 3689595 (1972-09-01), Gwinn
patent: 4211690 (1980-07-01), Asano et al.
patent: 4252914 (1981-02-01), Halasa et al.
patent: 4371662 (1983-02-01), Tone et al.
patent: 4386125 (1983-05-01), Shiraki et al.

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