US4531975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-fouling compositions
Assignee: Ameron Inc
•
Filing: 1984-01-25
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Granted: 1985-07-30
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Expires: 2004-01-25
Abstract
Abstract Marine anti-fouling compositions contain, in addition to the conventional resin, toxin, solvent, pigment and other additives, hollow particles, of size from 1 to 800 microns, in an amount to give a particle concentration in a dry paint film of 10 to 80% by volume. The hollow particles are preferably hollow microspheres or microballoons of glass or plastics material having an apparent bulk density of from 0.03 to 0.5 g/cc. The compositions can be applied at high film thicknesses in a single coat without crack-formation. The particles assist in maintaining a controlled slow release of toxin from the paint film, and can enhance the useful protective life thereof.
Inventors
- 👤 Frederik Salome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:28
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/16; C09D5/1687
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
77 words
In a marine anti-fouling liquid paint composition containing resin, marine toxin and solvent, the improvement comprising hollow particles of glass or sodium borosilicate having substantially no internal porosity, a particle size of from 1 to 800 microns, an apparent bulk density of 0.1 to 0.5 g/cc, as measured by liquid displacement, and present in an amount sufficient to give a particle concentration in a dry film formed from the composition of from 10% to 80% by volume.
Claim 2
Dependent Claim
77 words
In a marine anti-fouling liquid paint composition containing resin, marine toxin and solvent, the improvement comprising hollow particles of glass or sodium borosilicate having substantially no internal porosity, a particle size of from 1 to 800 microns, an apparent bulk density of 0.1 to 0.5 g/cc, as measured by liquid displacement, and present in an amount sufficient to give a particle concentration in a dry film formed from the composition of from 10% to 80% by volume.
Claim 3
Dependent Claim
17 words
An anti-fouling composition as claimed in claim 1, wherein the hollow particles are hollow microspheres or microballoons.
Claim 4
Dependent Claim
15 words
An anti-fouling composition as claimed in claim 1, wherein the hollow particles are of glass.
Claim 5
Dependent Claim
21 words
An anti-fouling composition as claimed in claim 1, wherein the hollow particles have sizes in the range 5 to 300 microns.
Claim 6
Dependent Claim
55 words
An anti-fouling composition as claimed in claim 1, wherein the hollow particles are present in an amount of from 25% by volume of a dry film prepared from the composition, up to the amount where they are in contact in the dry film with the interstices just filled with the remaining ingredients of the composition.
Claim 7
Dependent Claim
14 words
An anti-fouling composition as claimed in claim 1, wherein the particles are substantially rigid.
Claim 8
Dependent Claim
16 words
An anti-fouling composition as claimed in claim 1, wherein the resin is slowly dissolved by water.
Claim 9
Dependent Claim
26 words
An anti-fouling composition as claimed in claim 1, wherein the resin is chemically bonded to the toxin by a bond which is slowly hydrolysed by water.
Claim 10
Dependent Claim
30 words
A method of protecting a substrate, consisting in applying to the substrate a single coating having a thickness of at least 300 microns of the anti-fouling composition of claim 1.
References Cited (Backward Citations)
GB682432A
Cited
US3851053A
Cited
US3928564A
Cited
GB1457590A
Cited
US4115130A
Cited
US4171228A
Cited
US4297137A
Cited
US4229329A
Cited
US4352856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |