Rubber compositions modified with hydroxy-benz-imidazole oxides

Details Rubber compositions modified with hydroxy-benz-imidazole oxides Rubber compositions modified with hydroxy-benz-imidazole oxides

1987-04-13

1988-08-09

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524 92, 525347, C08K 534

Patent

active

047628707

ABSTRACT:
It now has been found that the properties of rubber compositions comprising rubbers having an unsaturated carbon chain can be improved by including therein, a minor property-improving amount of at least one hydroxy-benzimidazole oxide compound of the formula ##STR1## wherein R is hydrogen, or a halogen, hydroxyl, lower acyl, lower hydrocarbyl, lower hydrocarbyloxy, lower hydrocarbylthio, carboxyl, cyano, amino, amide or --C(O)-- lower hydrocarbyl group, and R' is hydrogen, or a lower hydrocarbyl, lower hydrocarbyl amide, carboxamide carboxy acid, carboxy ester, or aryl group. When vulcanizates are prepared from such rubber compositions containing one or more fillers, the vulcanizates exhibit reduced low strain hysteresis and a high electrical resistivity.
In another aspect of the invention, a filled vulcanizate made by vulcanizing uncured compositions of the type described above and containing a filler, particularly carbon black, is improved in filler interaction, hysteresis, modulus, compression set and resiliency. Rubber articles and portions thereof such as tires, hoses, springs, belts, treads, sidewalls and the like can be made utilizing the improved filled vulcanizates of the invention.

REFERENCES:
patent: 2367827 (1945-01-01), Smith
patent: 3247160 (1966-04-01), Anderson
patent: 4315849 (1982-02-01), Buxbaum et al.
J. Org. Chem., vol. 37, No. 15, 1972, pp. 2519-2520, 2372-2376.
A. Gasco et al., Advances in Heterocyclic Chemistry, vol. 29, pp. 310-311, Academic Press, 1981.
Houben Weyl, Methoden der Organischen Chemie, vol. X/III, p. 868.

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