US4139515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-fouling paint containing a copolymer of a triorganotin salt of an unsaturated carboxylic acid
Assignee: International Paint Ltd
•
Filing: 1977-11-07
•
Granted: 1979-02-13
•
Expires: 1997-11-07
Abstract
Abstract An anti-fouling paint for ships' hulls comprises an aqueous emulsion of a film-forming emulsion copolymer and a substantially water-insoluble metalliferous pigment capable of reacting with seawater to form a water-soluble metal compound. The compound contains units of at least one triorganotin salt of an olefinically unsaturated carboxylic acid and units of at least one olefinically unsaturated comonomer selected so that the copolymer has a glass transition temperature of less than 30 DEG C.
Inventors
- 👤 Simon P. J. Dennington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:55
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/16; C09D5/1606; C09D5/1637; C09D5/1643
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
97 words
An anti-fouling paint for ships' hulls comprising (a) an aqueous emulsion of a film-forming emulsion copolymer containing from more than 50 up to 80 percent by weight of units of at least one triorganotin salt of an olefinically unsaturated carboxylic acid, the balance of the copolymer being units of at least one olefinically unsaturated comonomer, the glass transition temperature of the copolymer being less than 30° C. and the inherent viscosity of the copolymer being from 0.5 to 1.5, and (b) a substantially water-insoluble metalliferous pigment capable of reacting with seawater to form a water-soluble metal compound.
Claim 2
Dependent Claim
97 words
An anti-fouling paint for ships' hulls comprising (a) an aqueous emulsion of a film-forming emulsion copolymer containing from more than 50 up to 80 percent by weight of units of at least one triorganotin salt of an olefinically unsaturated carboxylic acid, the balance of the copolymer being units of at least one olefinically unsaturated comonomer, the glass transition temperature of the copolymer being less than 30° C. and the inherent viscosity of the copolymer being from 0.5 to 1.5, and (b) a substantially water-insoluble metalliferous pigment capable of reacting with seawater to form a water-soluble metal compound.
Claim 3
Dependent Claim
29 words
An anti-fouling paint according to claim 1 in which the emulsion copolymer (a) includes units of a monomer which when homopolymerised has a glass transition temperature below 0° C.
Claim 4
Dependent Claim
21 words
An anti-fouling paint according to claim 1 in which the emulsion copolymer (a) has a glass transition temperature of 5°-25° C.
Claim 5
Dependent Claim
39 words
An anti-fouling paint according to claim 1 in which the emulsion copolymer (a) is a terpolymer of tripropyl tin or tributyl tin acrylate or methacrylate, an alkyl acrylate having 3-6 carbon atoms in the alkyl group and methyl methacrylate.
Claim 6
Dependent Claim
19 words
An anti-fouling paint according to claim 1 which additionally contains a water-soluble coalescing solvent for the emulsion copolymer (a).
Claim 7
Dependent Claim
16 words
An anti-fouling paint according to claim 1 having a pigment volume concentration of 25-50 per cent.
Claim 8
Dependent Claim
15 words
An anti-fouling paint according to claim 1 in which the said pigment is zinc oxide.
Claim 9
Dependent Claim
53 words
An anti-fouling paint according to claim 1 containing a hydrophobic organic retarder which retarder is a hydrophobic organic compound which has a solubility in seawater at 25° C. of not more than 5 parts per million by weight, is miscible with the copolymer (a) and has a negligible vapour pressure at 25° C.
Claim 10
Dependent Claim
17 words
An anti-fouling paint according to claim 8 in which the hydrophobic organic retarder is a silicone fluid.
Claim 11
Dependent Claim
21 words
An anti-fouling paint according to claim 1 which contains a water-insoluble pigment which does not react with or dissolve in seawater.
Claim 12
Dependent Claim
25 words
An anti-fouling paint according to claim 10 in which the unreactive pigment forms 5-40 percent by weight of the total pigment component of the paint.
Claim 13
Dependent Claim
18 words
An anti-fouling paint according to claim 10 in which the unreactive pigment is titanium dioxide or ferric oxide.
Claim 14
Dependent Claim
11 words
A ship's hull provided with anti-fouling paint according to claim 1.
References Cited (Backward Citations)
US3167473A
Cited
GB1062324A
Cited
GB1124297A
Cited
US4052354A
Cited
US3979354A
Cited
GB1457590A
Cited
US4021392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |