Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1998-11-10
2000-02-22
Warzel, Mark L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525192, 525193, 525194, 525197, 525240, C08L 2300
Patent
active
06028143&
ABSTRACT:
The present invention provides a rubber composition in which the coexistence of low heat build-up, heat resistance and high hardness can be achieved without damaging failure characteristics. According to the present invention, a rubber composition comprising a 100 parts by weight of matrix rubber and a 2-75 parts by weight of a polyethylene composition which contains 0-80% by weight of polyethylene and 20% by weight or more of a composite comprising a polyethylene component and a rubber component previously bonded via a coupling agent to the polyethylene component, said rubber component is crosslinked with the matrix rubber. At least at one of the kneading stages before the final stage, the compound is kneaded so that the maximum temperature of the compound of the kneading of that stage is higher than the melting point of the polyethylene component mixed, preferably, by 10.degree. C. or more.
REFERENCES:
patent: 4005054 (1977-01-01), Bonnefon et al.
Shinichi et al., "Polymer Alloy Composition and Its Production", Patent Abstracts of Japan, vol. 013, No. 595 (C-672, Dec. 27, 1989).
Mitsuru et al., "Pneumatic Tire", Patent Abstracts of Japan, vol. 016, No. 400 (C-0977), Aug. 25, 1992.
Bridgestone Corporation
Warzel Mark L.
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