Tetrabenzylthiuram disulfide/urea cured elastomeric composition
AssigneeUniroyal Chemical Company, Inc.
InventorsDonald G. Rowland, David T. Faiman, Thomas L. Jablonowski
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Abstract
The current invention relates to the use of tetrabenzylthiuram disulfide/urea curative package for thermosetting rubber elastomers in an environmentally sound method of eliminating undesirable nitrosamines. The unique curative package synergistically increases the cure rate and physical properties of the elastomeric compound while reducing the amount of accelerator needed for vulcanization.
Claims5
In a vulcanization process, the improvement which comprises combining with a thermosettable elastomeric composition a cure system consisting essentially of from about 0.02 to about 3.0 parts tetrabenzylthiuram disulfide, between 0.02 to about 6.0 phr urea and about 0.05 to 10 phr sulfur, each such cure system ingredient being present in an amount effect not only for enabling the thermosettable composition to cure to preselected physical property ranges but also for reducing to lesser-than-conventional levels the amount of nitrosamine generated upon curing.
Dependencies are inferred from the claim text.