US4191579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antifouling paint comprising a copolymer containing organo tin salt and a pigment having a component which reacts with sea water and another component which does not react with sea water
Assignee: International Paint Ltd
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Filing: 1977-10-12
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Granted: 1980-03-04
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Expires: 1997-10-12
Abstract
Abstract An antifouling paint for ships' hulls, comprising a film-forming copolymer and a pigment component, has the property that a rough film of the paint becomes smoother in relatively moving seawater. The film-forming copolymer contains 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 pigment component comprises a metalliferous pigment capable of reacting with seawater to form a water-soluble metal compound and a pigment which does not react with or dissolve in seawater.
Inventors
- 👤 George Hails
- 👤 John D. Symonds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:28
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/16; C09D5/1687; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/30; C08K5/00; C08K5/36; C08K5/39; C09D133/00; C09D133/02; C09D5/1606; C09D5/1637; C09D5/1643
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
116 words
An anti-fouling paint for ships' hulls comprising: (a) a film-forming copolymer containing 55 to 70 percent by weight of units of at least one triorgano tin salt of an olefinically unsaturated carboxylic acid, the balance of the copolymer being units of at least one olefinically unsaturated comonomer, and (b) a substantially water-insoluble pigment component, part of which comprises a cuprous pigment selected from the group consisting of cuprous thiocyanate and cuprous oxide capable of reacting with sea water to form a water-soluble metal compound and part of which comprises an unreactive pigment which does not react with or dissolve in sea water, the ratio of cuprous pigment to unreactive pigment being 60:40 to 90:10 by volume.
Claim 2
Dependent Claim
116 words
An anti-fouling paint for ships' hulls comprising: (a) a film-forming copolymer containing 55 to 70 percent by weight of units of at least one triorgano tin salt of an olefinically unsaturated carboxylic acid, the balance of the copolymer being units of at least one olefinically unsaturated comonomer, and (b) a substantially water-insoluble pigment component, part of which comprises a cuprous pigment selected from the group consisting of cuprous thiocyanate and cuprous oxide capable of reacting with sea water to form a water-soluble metal compound and part of which comprises an unreactive pigment which does not react with or dissolve in sea water, the ratio of cuprous pigment to unreactive pigment being 60:40 to 90:10 by volume.
Claim 3
Dependent Claim
16 words
A paint according to claim 1 having a pigment volume concentration of 25 to 50 percent.
Claim 4
Dependent Claim
14 words
A paint according to claim 1 in which the unreactive pigment comprises titanium dioxide.
Claim 5
Dependent Claim
14 words
A paint according to claim 1 in which the unreactive pigment comprises ferric oxide.
Claim 6
Dependent Claim
92 words
An anti-fouling paint for ships' hulls comprising (a) a film-forming copolymer containing 55 to 70 percent by weight of units of at least one triorgano tin salt of an olefinically unsaturated carboxylic acid, the balance of the copolymer being units of at least one olefinically unsaturated comonomer, and (b) a substantially water-insoluble pigment component, part of which comprises zinc oxide and part of which comprises an unreactive pigment which does not react with or dissolve in sea water, the ratio of zinc oxide to unreactive pigment being 40:60 to 85:15 by volume.
Claim 7
Dependent Claim
92 words
An anti-fouling paint for ships' hulls comprising (a) a film-forming copolymer containing 55 to 70 percent by weight of units of at least one triorgano tin salt of an olefinically unsaturated carboxylic acid, the balance of the copolymer being units of at least one olefinically unsaturated comonomer, and (b) a substantially water-insoluble pigment component, part of which comprises zinc oxide and part of which comprises an unreactive pigment which does not react with or dissolve in sea water, the ratio of zinc oxide to unreactive pigment being 40:60 to 85:15 by volume.
Claim 8
Dependent Claim
16 words
A paint according to claim 5 having a pigment volume concentration of 25 to 50 percent.
Claim 9
Dependent Claim
14 words
A paint according to claim 5 in which the unreactive pigment comprises titanium dioxide.
Claim 10
Dependent Claim
14 words
A paint according to claim 5 in which the unreactive pigment comprises ferric oxide.
References Cited (Backward Citations)
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Cited
US3854960A
Cited
US3912519A
Cited
FR2216913A1
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) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |