Thermoplastic elastomer blends with bitumen

Details Thermoplastic elastomer blends with bitumen Thermoplastic elastomer blends with bitumen

1981-09-17

1983-06-07

Ziegler, J.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524 70, C03L 9500

Patent

active

043871755

ABSTRACT:
Thermoplastic elastomer compositions of the present invention comprise a blend of from about 10 to about 50 parts by weight of a crystalline 1-olefin polymer, from about 80 to about 15 parts by weight of a styrene-butadiene rubber, and from about 5 to about 50 parts by weight of bitumen. The thermoplastic blends have unexpectant increases in properties, especially tear strength, tensile strength, high temperature (100.degree. C.) tear strength, and smooth surfaces when injection molded. Moreover, the bitumen lowers the injection molding pressure, thus enabling larger parts to be molded. The compositions, which may be partially cured, also have excellent aging properties. The compositions are a true thermoplastic in that they can be repeatedly processed and yet maintain their good physical properties.

REFERENCES:
patent: 3307605 (1967-03-01), Bulgin et al.
patent: 3338849 (1967-08-01), Johnson

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