Rubber compositions containing a vulcanization system alterative

Details Rubber compositions containing a vulcanization system alterative Rubber compositions containing a vulcanization system alterative

1982-08-11

1985-01-29

Schofer, Joseph L.

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...

524574, 524575, 5245755, 525343, 5253326, 5253327, C08K 304

Patent

active

044966830

ABSTRACT:
Compositions of vulcanizeable diene rubber, a cross-linking agent, a vulcanization accelerator and a vulcanization system alterative are disclosed, which have improved properties of scorch delay, cure rate and reversion resistance. The alterative is a compound of the formula ##STR1## where R.sub.1 and R.sub.2 are the same or different radicals selected from alkyl of 1-12 carbon atoms, phenyl, cycloalkyl of 3-8 carbon atoms and alkyaryl and aralkyl of 7-12 carbon atoms, and R.sub.3 is selected from the same as R.sub.1 and R.sub.2, optionally substituted with one or more halogen, nitro, alkoxy, carboalkoxy, acyl, acyloxy, amido, cyano, thio or sulfonyl substituents.

REFERENCES:
patent: 1949629 (1934-03-01), Romieux et al.
patent: 2063629 (1936-12-01), Salzberg et al.
patent: 3035082 (1962-05-01), Lorenz
patent: 3109770 (1963-11-01), Price et al.
patent: 3544531 (1970-12-01), Morita
patent: 3705923 (1972-12-01), Sullivan
patent: 3859297 (1975-01-01), Sullivan
patent: 3869435 (1975-03-01), Trivette, Jr.
patent: 4119780 (1978-10-01), Sullivan
Pimblott et al., "Bis(Diisopropyl)Thiophosphoryl Disulfide in Cis-1,4-Polyisoprene Vulcanization Reaction I, as a Sulfur Donor, " JACS 19, 865-877 (1975).

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