US4407997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine paint
Assignee: International Paint Ltd
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Filing: 1981-10-21
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Granted: 1983-10-04
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Expires: 2001-10-21
Abstract
Abstract A marine paint capable of becoming smoother in relatively moving sea water and having no or a low content of organotin comprises a film-forming acrylic polymer and a metalliferous pigment which is sparingly soluble in seawater. The acrylic polymer comprises 20-100 percent by weight of monomer units (A) selected from methyl acrylate and ethyl acrylate units, 0-45 percent by weight of monomer units (B) of a triorganotin salt of an olefinically unsaturated carboxylic acid and 0-80 percent by weight of monomer units (C) which are alkyl methacrylate units having 1-4 carbon atoms in the alkyl group or styrene units. Monomer units (A), (B) and (C) form at least 80 percent by weight of the acrylic polymer; the balance of the polymer if any comprises units of at least one other olefinically unsaturated comonomer.
Inventors
- 👤 Cristian M. Sghibartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:56
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/08; C09D125/00; C09D125/02; C09D125/04; C09D125/08; C09D125/14; C09D133/10; C09D5/00; C09D5/16; C09D5/1606; C09D5/1637; C09D5/1643
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
148 words
A marine paint comprising a film-forming acrylic polymer and a metalliferous pigment which is sparingly soluble in seawater, in which the acrylic polymer comprises 20 to 70 percent by weight of monomer units (A) selected from methyl acrylate and ethyl acrylate, 10 to 45 percent by weight of monomer units (B) of a triorganotin salts of an olefinically unsaturated carboxylic acid, and 20 to 50 percent by weight of units (C) which are alkyl methacrylate units having 1 to 4 carbon atoms in the alkyl group or styrene units, provided that if the acrylic polymer is prepared by emulsion polymerisation it contains no more than 40 percent by weight of monomer units (C), the monomer units (A), (B) and (C) forming at least 80 percent by weight of the polymer and the balance of the polymer if any being units of at least one other olefinically unsaturated comonomer.
Claim 2
Dependent Claim
148 words
A marine paint comprising a film-forming acrylic polymer and a metalliferous pigment which is sparingly soluble in seawater, in which the acrylic polymer comprises 20 to 70 percent by weight of monomer units (A) selected from methyl acrylate and ethyl acrylate, 10 to 45 percent by weight of monomer units (B) of a triorganotin salts of an olefinically unsaturated carboxylic acid, and 20 to 50 percent by weight of units (C) which are alkyl methacrylate units having 1 to 4 carbon atoms in the alkyl group or styrene units, provided that if the acrylic polymer is prepared by emulsion polymerisation it contains no more than 40 percent by weight of monomer units (C), the monomer units (A), (B) and (C) forming at least 80 percent by weight of the polymer and the balance of the polymer if any being units of at least one other olefinically unsaturated comonomer.
Claim 3
Dependent Claim
22 words
Marine paint according to claim 1 in which the acrylic polymer is prepared using a free radical catalyst in an organic solvent.
Claim 4
Dependent Claim
14 words
Marine paint according to claim 1 in which the metalliferous pigment comprises cuprous oxide.
Claim 5
Dependent Claim
27 words
Marine paint according to claim 1 in which the metalliferous pigment is selected from mixtures of zinc oxide with cuprous oxide, cuprous thiocyanate and zinc dimethyl dithiocarbamate.
Claim 6
Dependent Claim
20 words
Marine paint according to claim 1 in which the polymer includes up to 20 percent by weight maleic anhydride units.
Claim 7
Dependent Claim
21 words
Marine paint according to claim 1 in which the polymer includes up to 20 percent by weight acrylamide or methacrylamide units.
Claim 8
Dependent Claim
23 words
Marine paint according to claim 1 in which the polymer includes up to 5 percent by weight acrylic acid or methacrylic acid units.
Claim 9
Dependent Claim
16 words
Marine paint according to claim 1 in which the monomer units (B) are tributyltin methacrylate units.
Claim 10
Dependent Claim
16 words
Marine paint according to claim 1 in which the monomer units (C) are methyl methacrylate units.
Claim 11
Dependent Claim
33 words
Marine paint according to claim 1 in which the proportion of pigment to polymer is such as to give a pigment volume concentration of at least 35 percent in the dry paint film.
References Cited (Backward Citations)
GB1062324A
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GB1408327A
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GB1457590A
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US4021392A
Cited
JPS5232928A
Cited
US4191579A
Cited
US4139515A
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GB2007235B
Cited
US4260535A
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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) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |