Curing systems for halogenated elastomers

Details Curing systems for halogenated elastomers Curing systems for halogenated elastomers

1993-04-29

1994-12-13

Lipman, Bernard

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5253341, 525343, 525360, 525363, C08F 842

Patent

active

053730623

ABSTRACT:
An improved promoted curing system for halogenated elastomers has been discovered wherein the curing system contains one or a mixture of bismuth carboxylates having the structure of Formula 1: ##STR1## wherein R.sub.1 is selected from the group consisting of straight or branched chain alkyl groups having from 4 to about 30 carbon atoms, aromatic groups containing 6 to about 30 carbon atoms and alkaryl groups containing from 7 to about 30 carbon atoms.
It has been found that the use of these bismuth salts, alone or in combination with zinc compounds in the cure of compositions containing halogenated elastomers leads to full, low reversion cures and curable compositions exhibiting very low precure scorch properties.

REFERENCES:
patent: 2940960 (1960-06-01), Tegge et al.
patent: 3099644 (1963-07-01), Parker et al.
patent: 3532649 (1970-10-01), Smith et al.
patent: 5162445 (1992-11-01), Powers et al.

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