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US 4,051,078 AGranted
Chlorinated elastomer compositions
AssigneeDainichi-Nippon Cables, Ltd.
InventorsHirosi Kato, Hideo Fujita
Life of this patent
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Abstract
The invention provides a curable composition of polychloroprene, chlorinated polyethylene or polyepichlorohydrin containing at least one metal oxide having an oxidation state of 2 to 5 valences as a curing agent and at least one accelerator of the formula A--(S).sub.n --A' wherein S is a sulfur atom, A and A' are polyhydroxy aryl groups having 6 to 18 ring carbon atoms and n is zero or an integer of 1 to 4. The accelerators enable a satisfactory rate and state of cure with the metal oxide.
Claims7
A chlorinated elastomer composition comprising
- a. a chlorinated elastomer selected from the group consisting of polychloroprene, chlorinated polyethylene and polyepichlorohydrin,
- b. 3 to 30 parts of at least one metal oxide of Groups II, IV, V, VI, and VIII of the Periodic Table, wherein the metal has an oxidation state of 2 to 5 valences as a curing agent, and
- c. 0.1 to 10 parts of at least one accelerator having the general formula:
- A--(S).sub.n --A'
- wherein S is sulfur atom, A and A' are polyhydroxy aryl groups having 6 to 18 ring carbon atoms and n is zero or an integer of 1 to 4, said parts of (b) and (c) being parts by weight per 100 parts of (a).
2 more elements
A process for curing chlorinated elastomers comprising the steps of
- 1. blending (a) a chlorinated elastomer selected from the group consisting of polychloroprene, chlorinated polyethylene and polyepichlorohydrin with (b) 3 to 30 parts of at least one metal oxide of Groups II, IV, V, VI, and VIII of the Periodic Table, wherein the metal has an oxidation state of 2 to 5 valences as a curing agent and (c) 0.1 to 10 parts of at least one accelerator having the general formula:
- A--(S).sub.n --A'
- wherein S is sulfur atom, A and A' are polyhydroxy aryl groups having 6 to 18 ring carbon atoms and n is zero or an integer of 1 to 4, and
- 2. curing the resulting composition at a temperature of 80.degree. to 230.degree. C. for 2 to 120 minutes, said parts of (b) and (c) being parts by weight per 100 parts of (a).
1 more element
Dependencies are inferred from the claim text.