Package for compounding rubber and compounded rubber

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...


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525236, 525237, 525939, 524505, 523351, C08L 700, C08L 900, C08L 902, C08L 906




A package comprised of (A) compounding ingredients for unvulcanized rubber packaged in (B) a film comprised of syndiotactic-1,2-polybutadiene, sulfur, accelerator and retarder. The invention further relates to a compounded rubber comprised of a mixture of such package and sulfur curable rubber. The film may also contain additional selected rubbers.

patent: 2617775 (1952-11-01), Newberg et al.
patent: 3930107 (1975-12-01), Yaeda et al.
patent: 4110500 (1978-08-01), Evans et al.
patent: 4112158 (1978-09-01), Cheekmore et al.


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