Polymer-modified rubber composition

Details Polymer-modified rubber composition Polymer-modified rubber composition

1994-09-16

1996-04-23

Thibodeau, Paul J.

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

Synthetic resins

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

525 95, 525 99, 5253315, 5253333, C08F 1208, C08F11208

Patent

active

055104193

ABSTRACT:
A polymer-modified rubber composition is formed by blending together about 5% to about 60% vulcanized styrene-butadiene rubber crumb; about 5% to about 60% uncured rubber; about 5% to about 30% styrene-based thermoplastic resin; about 1% to about 10% homogenizing agent adapted to facilitate blending of aromatic-based with non aromatic-based polymers; and about 1% to about 10% curing agent for the uncured rubber; to form a blend wherein the thermoplastic resin (c) is substantially homogeneously blended with the rubbers (a) and (b). All major components of the composition may be derived from the post industrial and post consumer waste stream. The compositions have excellent physical properties, especially stiffness and stiffness retention at elevated temperatures.

REFERENCES:
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patent: 4028288 (1977-06-01), Turner
patent: 4256850 (1981-03-01), Thorsrud
patent: 5010122 (1991-04-01), Koski
patent: 5039714 (1991-08-01), Kasahara et al.
patent: 5145877 (1992-09-01), Bopp et al.
patent: 5166221 (1992-11-01), Hahn et al.
"Tech Book Facts--Pliolite", Goodyear Chemicals, PLR-1-1 to PLR-1-4.
"Vestenamer" Struktol Company Limited, Aug. 1989 pp.1-10.

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