US3933723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic rubber solutions
Assignee: Individual
•
Filing: 1974-11-11
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Granted: 1976-01-20
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Expires: 1994-11-11
Abstract
Abstract The invention relates to a solution for the production of rubber-like articles by dipping, said solution comprising an elastomer of the block-copolymer type extended with 5-100 percent by weight of an oil-extender, the oil-extended elastomer being dissolved in 200-1200 percent by weight of a solvent mainly consisting of aliphatic hydrocarbons. The invention further relates to the production of said articles from said solvents, and to the produced articles.
Inventors
- 👤 Torbjorn Grenness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:37
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/092; C08J5/00; C08J5/02; C08J2353/00; C08J2353/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
106 words
A solution for the production of rubber-like articles by dipping, comprising an elastomer of the block-copolymer type selected from the group consisting of styrene-butadiene copolymer and styrene-isoprene copolymer, chosen from the thermoplastic rubbers which do not need vulcanization, extended with 15 to 35% by weight of a naphthenic oil extender, the extended block-copolymer being dissolved in 200 to 1200% by weight of petrol, all of the percentages being per 100 parts of said elastomer, and a member selected from the group consisting of zinc dibutyl-dithiocarbamate and 1,3,5-trimethyl-2,4,6-tris-(3,5-di-tert.-butyl-4-hydroxy-benzyl)-benzene at a ratio of about 0.1 to 3.0 parts by weight per 100 parts by weight of said elastomer.
Claim 2
Dependent Claim
106 words
A solution for the production of rubber-like articles by dipping, comprising an elastomer of the block-copolymer type selected from the group consisting of styrene-butadiene copolymer and styrene-isoprene copolymer, chosen from the thermoplastic rubbers which do not need vulcanization, extended with 15 to 35% by weight of a naphthenic oil extender, the extended block-copolymer being dissolved in 200 to 1200% by weight of petrol, all of the percentages being per 100 parts of said elastomer, and a member selected from the group consisting of zinc dibutyl-dithiocarbamate and 1,3,5-trimethyl-2,4,6-tris-(3,5-di-tert.-butyl-4-hydroxy-benzyl)-benzene at a ratio of about 0.1 to 3.0 parts by weight per 100 parts by weight of said elastomer.
Claim 3
Dependent Claim
14 words
A solution according to claim 1 in which said blockcopolymer type is styrene-butadiene block-copolymer.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |