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US3622547A
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Vulcanization system for acrylate elastomers (trithiocyanuric acid and dithiocarbamic acid derivatives)
Assignee: Wyeth Holdings LLC
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Filing: 1969-10-29
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Granted: 1971-11-23
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Expires: 1989-10-29
Abstract
Abstract A vulcanizable acrylic elastomer composition having chlorine or epoxy groups contains as a vulcanization system trithiocyanuric acid and a dithiocarbamic acid derivative. 2,2''-dithiobis(benzothiazole) is included when maximum scorch protection is desired.
Inventors
- 👤 Nicholas P Ermidis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:50
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/39
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
37 words
The composition of claim 1 wherein from about 0.25 to about five parts by weight each of trithiocyanuric acid and of a thiuram sulfide or a metal dithiocarbamate per 100 parts elastomer are included in the composition.
Claim 2
Dependent Claim
16 words
The composition of claim 1 wherein the dithiocarbamic acid derivative is thiuram sulfide having the formula
Claim 3
Dependent Claim
23 words
The composition of claim 1 wherein the dithiocarbamic acid derivative is zinc, copper, cadmium, lead, bismuth, iron, cobalt, manganese, tellurium or selenium dithiocarbamate.
Claim 4
Dependent Claim
7 words
The composition of claim 1 containing 2,2''-dithio-bis(benzothiazole).
Claim 5
Dependent Claim
22 words
The composition of claim 5 containing from about 0.1 to about three parts by weight per 100 parts of elastomer of 2,2''-dithio-bis-(benzothiazole).
Claim 6
Dependent Claim
12 words
The composition of claim 4 wherein the metal dithiocarbamate is lead dimethyldithiocarbamate.
Claim 7
Dependent Claim
12 words
The composition of claim 4 wherein the metal dithiocarbamate is copper dimethyldithiocarbamate.
Claim 8
Dependent Claim
13 words
The composition of claim 1 wherein the dithiocarbamic acid derivative is tetramethylthiuram monosulfide.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |