Heat-aging-resistant rubber composition

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

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524303, 524366, 524377, C08K 506, C08K 536

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active

043861814

ABSTRACT:
A heat-aging-resistant rubbery polymer composition comprising a rubbery polymer, at least one compound selected from the group consisting of diphenylamine derivatives and phenol derivatives as an age resister for said rubbery polymer, and polyalkylene ether glycol having an average molecular weight of 100-5,000, and optionally a compound represented by the formula, ##STR1## in which R is alkyl having 10 to 20 carbon atoms. Preferably, said at least one compound selected from the group consisting of diphenylamine derivatives and phenol derivatives is chemically linked to said rubbery polymer as a part of the molecular chain. Said rubbery polymer composition is unexpectedly superior in heat-aging-resistance to a composition consisting only of said rubbery polymer and said age resister or a composition consisting only of said rubbery polymer and said polyalkylene ether glycol.

REFERENCES:
patent: 2912388 (1959-10-01), Leahy et al.
patent: 3012269 (1962-01-01), Clough
patent: 3646006 (1972-02-01), Lord
patent: 3658769 (1972-04-01), Kline
patent: 4125515 (1978-11-01), Kuczkowski
Horvath, "Bound Antioxidant Stabilized NBR in Automotive Applications", Elastomerics, Aug. 1979, pp. 19 to 26 and 62.

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