Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1994-06-28
1996-09-10
Cain, Edward
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
5253325, 5253326, C08C 1900
Patent
active
055546994
ABSTRACT:
Branched and cyclic N,N-dialkyldithiocarbamyl accelerators for the sulfur vulcanization of rubber have been found to generally perform as well as the corresponding straight chain N,N-dialkyldithiocarbamyl accelerators, but surprisingly do not produce detectable amounts of environmentally undesirable N-nitrosamines.
The branched N,N-alkyldithiocarbamyl accelerators are generally represented by the formula: ##STR1## where R is a branched alkyl group, R' is an alkyl group which may or may not be branched or a cyclic alkyl group or an alkaryl or aryl group, X is another thiocarbamyl group of the same general structure, a primary alkylamino group, an alkylthio group, a 2-benzothiazyl group, or a metal ion, and n is an integer of from 1 to 6.
The cyclic dithiocarbamyl accelerators of the invention are generally represented by the formula ##STR2## where X is another thiocarbamyl group of the same general structure, a primary alkylamino group, an alkylthio group, a 2-benzothiazyl group, or a metal ion, and n is an integer of from 1 to 6.
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Chasar Dwight W.
Layer Robert W.
Cain Edward
Laferty Samuel B.
The B. F. Goodrich Company
Tucker Mary Ann
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