Patent US4329277A successfully refreshed from Google Patents.
US4329277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antifouling polyurethanes
Assignee: Goodrich Corp
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Filing: 1980-10-03
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Granted: 1982-05-11
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Expires: 2000-10-03
Abstract
Abstract Polyurethane formulations that are resistant to fouling by marine organisms when exposed to sea water are prepared by mixing tetrachloroisophthalonitrile with a polyurethane. Any of the known polyurethanes may be used and liquid castable compositions are particularly useful.
Inventors
- 👤 Walter T. Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:35
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/315
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
26 words
A polymeric composition resistant to fouling in sea water comprising a polyurethane elastomer containing greater than 2 weight parts of tetrachloroisophthalonitrile per 100 weight parts polyurethane.
Claim 2
Dependent Claim
26 words
A polymeric composition resistant to fouling in sea water comprising a polyurethane elastomer containing greater than 2 weight parts of tetrachloroisophthalonitrile per 100 weight parts polyurethane.
Claim 3
Dependent Claim
19 words
A composition of claim 1 wherein said polyurethane is a polyetherurethane containing 3 to 20 weight parts of tetrachloroisophthalonitrile.
Claim 4
Dependent Claim
27 words
A composition of claim 2 wherein said polyetherurethane is prepared from a polyether glycol of molecular weights from about 400 to 5,000 reacted with a cyclic diisocyanate.
Claim 5
Dependent Claim
59 words
A composition of claim 3 wherein said polyether glycol has the formula HO[(CH 2 ) n O] x H wherein n is a number from 2 to 6 and x is an integer, said cyclic diisocyanate is an aromatic diisocyanate, said tetrachloroisophthalonitrile is present in amounts from 5 to 15 weight parts, and there is present a cross-linking agent.
Claim 6
Dependent Claim
41 words
A composition of claim 4 wherein said cross-linking agent is trimethylol propane and said reactants are present in a ratio of 1 mol of polyether glycol, 0.2 to 3 mols of trimethylol propane and 1.2 to 4.0 moles of aromatic diisocyanate.
Claim 7
Dependent Claim
13 words
A composition of claim 4 wherein said aromatic diisocyanate is a tolylene diisocyanate.
Claim 8
Dependent Claim
31 words
A composition of claim 2 wherein said polyurethane is prepared from a polyester glycol of molecular weights from about 400 to 5,000 reacted with a cyclic diisocyanate and a cross-linking agent.
Claim 9
Dependent Claim
40 words
A composition of claim 7 wherein said polyester is a polyester of a glycol containing 2 to 10 carbon atoms and a dicarboxylic acid of the formula HOOC--R--COOH wherein R is an alkylene radical containing 4 to 6 carbon atoms.
Claim 10
Dependent Claim
38 words
A composition of claim 2 wherein said polyurethane is prepared from a hydroxyl-terminated liquid polymer having an aliphatic polymeric backbone and a molecular weight from about 400 to 5,000 reacted with a cyclic diisocyanate and a cross-linking agent.
Claim 11
Dependent Claim
21 words
A composition of claim 9 wherein said hydroxyl-terminated liquid polymer is a hydroxyl-terminated butadiene polymer or a hydroxyl-terminated acrylate ester polymer.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-10 | 1985-11-09 | 1986-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-10 | 1989-11-09 | 1990-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-10 | 1993-11-09 | 1994-05-11 | $7700.00 | Window Closed / Lapsed |