Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1990-12-13
1993-06-15
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525217, 525236, 525237, C08L 700
Patent
active
052199428
ABSTRACT:
A rubber composition comprises as rubber components (A) 30-95 wt. % of an end-modified styrene-butadiene copolymer and (B) 70-5 wt. % of a diene rubber other than the end-modified styrene-butadiene copolymer (A). The end-modified styrene-butadiene copolymer (A) is obtained by reacting at least one compound to active terminals of a starting styrene-butadiene copolymer containing butadiene moieties, the trans-1,4 bond content of which is 70-95 wt. %, and having a styrene content of 5-60 wt. %. The at least one compound is selected from N-substituted aminoketones, N-substituted thioaminoketones, N-substituted aminoaldehydes, N-substituted thioaminoaldehydes and compounds containing in the molecules thereof an atomic group represented by the following formula: ##STR1## in which M stands for an oxygen or sulfur atom. The diene rubber (B) has a glass transition temperature higher than -60.degree. C.
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Akita Shuichi
Chino Yoshihiro
Suzuki Fumitoshi
Asinovsky Olga
Michl Paul R.
Nippon Zeon Co. Ltd.
The Yokohama Rubber Co. Ltd.
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