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US4051078A
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Chlorinated elastomer compositions
Assignee: Dainichi Nippon Cables Ltd
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Filing: 1975-10-14
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Granted: 1977-09-27
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Expires: 1995-10-14
Abstract
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.
Inventors
- 👤 Hirosi Kato
- 👤 Hideo Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:56
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/02; C08L71/03; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/36; C08K5/37; C08K5/375
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
121 words
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).
Claim 2
Dependent Claim
121 words
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).
Claim 3
Dependent Claim
18 words
The composition of claim 1, wherein said n in the formula is an integer of 1 to 4.
Claim 4
Dependent Claim
37 words
The composition of claim 2, in which the composition contains 0.1 to 5 parts by weight of a polyhydroxy aromatic compound having 6 to 18 ring carbon atoms per 100 parts by weight of the chlorinated elastomer.
Claim 5
Dependent Claim
30 words
The composition of claim 1, wherein said accelerator is present in an amount of from 0.5 to 5 parts by weight per 100 parts by weight of the chlorinated elastomer.
Claim 6
Dependent Claim
43 words
The composition of claim 1, wherein said accelerator is a reaction product of 1.5 to 4 moles of a polyhydroxy aromatic compound having 6 to 18 ring carbon atoms with one mole of sulfur monochloride at a temperature of -10° to 100° C.
Claim 7
Dependent Claim
38 words
The composition of claim 5, in which the composition contains 0.1 to 5 parts by weight of a polyhydroxy aromatic compound having 6 to 18 ring carbon atoms ring per 100 parts by weight of the chlorinated elastomer.
Claim 8
Dependent Claim
148 words
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° to 230° C. for 2 to 120 minutes, said parts of (b) and (c) being parts by weight per 100 parts of (a).
Claim 9
Dependent Claim
148 words
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° to 230° C. for 2 to 120 minutes, said parts of (b) and (c) being parts by weight per 100 parts of (a).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |