US4012332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber vulcanization accelerator composition
Assignee: Wyeth Holdings LLC
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Filing: 1976-03-16
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Granted: 1977-03-15
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Expires: 1996-03-16
Abstract
Abstract The present invention is based on the discovery of an accelerator composition for the vulcanization of diene elastomers, comprising a benzothiazole sulfenamide, a thiuram sulfide and copper 2-mercaptobenzothiazole.
Inventors
- 👤 Rudolf Adolf Behrens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:16
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/45; C08K5/46; C08K5/47; C08K5/39; C08K5/40; C08K5/43; C08K5/44
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
86 words
A rubber vulcanization accelerator composition comprising (a) from about 0.1 to 1.5 parts of a benzothiazole-2-sulfenamide, (b) from about 0.02 to 1.5 parts of a thiuram sulfide or a metal dithiocarbamate, said metal being selected from the group consisting of zinc, cadmium, tellurium, bismuth, nickel, selenium and lead, and (c) from about 0.002 to 1.5 parts of copper 2-mercaptobenzothiazole per each 100 parts of said rubber; the weight ratio of said components (a), (b) and (c) being in the range from about 10:1:0.05 to 1:1:1, respectively.
Claim 2
Dependent Claim
86 words
A rubber vulcanization accelerator composition comprising (a) from about 0.1 to 1.5 parts of a benzothiazole-2-sulfenamide, (b) from about 0.02 to 1.5 parts of a thiuram sulfide or a metal dithiocarbamate, said metal being selected from the group consisting of zinc, cadmium, tellurium, bismuth, nickel, selenium and lead, and (c) from about 0.002 to 1.5 parts of copper 2-mercaptobenzothiazole per each 100 parts of said rubber; the weight ratio of said components (a), (b) and (c) being in the range from about 10:1:0.05 to 1:1:1, respectively.
Claim 3
Dependent Claim
12 words
The composition according to claim 1 wherein said benzothiazole-2-sulfenamide is N-oxydiethylene benzothiazole-2-sulfenamide.
Claim 4
Dependent Claim
12 words
The composition according to claim 1 wherein said benzothiazole-2-sulfenamide is N-cyclohexyl benzothiazole-2-sulfenamide.
Claim 5
Dependent Claim
12 words
The composition according to claim 1 wherein said benzothiazole-2-sulfenamide is N-tert-butyl benzothiazole-2-sulfenamide.
Claim 6
Dependent Claim
12 words
The composition according to claim 1 wherein said benzothiazole-2-sulfenamide is N,N-diisopropyl benzothiazole-2-sulfenamide.
Claim 7
Dependent Claim
12 words
The composition according to claim 1 wherein said benzothiazole-2-sulfenamide is N,N-dicyclohexyl benzothiazole-2-sulfenamide.
Claim 8
Dependent Claim
14 words
The composition according to claim 1 wherein said thiuram sulfide is tetramethyl thiuram monosulfide.
Claim 9
Dependent Claim
14 words
The composition according to claim 1 wherein said thiuram sulfide is tetramethyl thiuram disulfide.
Claim 10
Dependent Claim
14 words
The composition according to claim 1 wherein the metal dithiocarbamate is zinc dimethyl dithiocarbamate.
Claim 11
Independent Claim
96 words
A method for increasing the processing safety of a rubber vulcanization accelerator composition comprising (a) from about 0.1 to 1.5 parts of a benzothiazole-2-sulfenamide, and (b) from about 0.02to 1.5 parts of a thiuram sulfide or a metal dithiocarbamate, said metal being selected from the group consisting of zinc, cadmium, tellurium, bismuth, nickel, selenium and lead; which comprises adding from about 0.002 to 1.5 parts of copper 2-mercaptobenzothiazole per each 100 parts of said rubber, the weight ratio of components (a) and (b) to the copper 2-mercaptobenzothiazole being in the range from about 10:1:0.05 to 1:1:1.
Claim 12
Independent Claim
96 words
A method for increasing the processing safety of a rubber vulcanization accelerator composition comprising (a) from about 0.1 to 1.5 parts of a benzothiazole-2-sulfenamide, and (b) from about 0.02to 1.5 parts of a thiuram sulfide or a metal dithiocarbamate, said metal being selected from the group consisting of zinc, cadmium, tellurium, bismuth, nickel, selenium and lead; which comprises adding from about 0.002 to 1.5 parts of copper 2-mercaptobenzothiazole per each 100 parts of said rubber, the weight ratio of components (a) and (b) to the copper 2-mercaptobenzothiazole being in the range from about 10:1:0.05 to 1:1:1.
References Cited (Backward Citations)
US3644304A
Cited
US3844970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |