Patent US4737403A successfully refreshed from Google Patents.
US4737403A
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US
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Method of coating fiber-reinforced plastic substrates
Assignee: PPG Industries Inc
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Filing: 1987-04-03
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Granted: 1988-04-12
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Expires: 2007-04-03
Abstract
Abstract A method of coating a fiber-reinforced plastic substrate is disclosed. The method comprises the application of a primer coat directly to the fiber-reinforced plastic substrate. The primer is an organic resinous composition comprising a polyepoxide and a polyacid curing agent. A topcoat is then applied to the primer coat. The composite coating using the polyepoxide-polyacid primer provides for coated fiber-reinforced plastic substrates with excellent appearance as well as good chip resistance and adhesion, as well as tolerance to overbaking conditions.
Inventors
- 👤 Dennis A. Simpson
- 👤 Samuel Porter, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:00
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/043; C08J2367/00; C08J2367/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31518
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
66 words
A method of applying a composite coating to a fiber-reinforced plastic substrate comprising: (A) applying directly to a surface of said substrate a primer coating composition comprising a polyepoxide and a polyacid curing agent and forming a continuous primer coat on the surface of the substrate, and (B) applying directly to the primer coat a topcoating composition and forming a continuous topcoat on the primer coat.
Claim 2
Independent Claim
66 words
A method of applying a composite coating to a fiber-reinforced plastic substrate comprising: (A) applying directly to a surface of said substrate a primer coating composition comprising a polyepoxide and a polyacid curing agent and forming a continuous primer coat on the surface of the substrate, and (B) applying directly to the primer coat a topcoating composition and forming a continuous topcoat on the primer coat.
Claim 3
Dependent Claim
15 words
The method of claim 1 in which the fiber-reinforced plastic substrate is fiberglass-reinforced polyester substrate.
Claim 4
Dependent Claim
36 words
The method of claim 1 in which the polyepoxide is a copolymer of a monoethylenically unsaturated monomer having at least one epoxy group and at least one monoethylenically unsaturated monomer which is free of epoxy groups.
Claim 5
Dependent Claim
20 words
The method of claim 3 in which the copolymer has a number average molecular weight of between 1000 and 20,000.
Claim 6
Dependent Claim
26 words
The method of claim 4 in which the copolymer is a copolymer of glycidyl acrylate or methacrylate with at least one other copolymerizable ethylenically unsaturated monomer.
Claim 7
Dependent Claim
37 words
The method of claim 5 in which the other copolymerizable ethylenically unsaturated monomer comprises at least in part an alkyl ester of acrylic or methacrylic acid containing from 1 to 20 carbon atoms in the alkyl group.
Claim 8
Dependent Claim
28 words
The method of claim 5 in which the glycidyl acrylate or methacrylate comprises from 5 to 60 percent of the monomers used in preparing the epoxy-containing acrylic polymer.
Claim 9
Dependent Claim
34 words
The method of claim 3 in which the epoxy group-containing acrylic polymer is present in the crosslinkable composition in amounts of 10 to 90 percent by weight based on total weight of resin solids.
Claim 10
Dependent Claim
23 words
The method of claim 1 in which the polyacid curing agent is a carboxyl-terminated material having at least 2 carboxyl groups per molecule.
Claim 11
Dependent Claim
15 words
The method of claim 9 in which the polyacid curing agent is a carboxyl-terminated polyester.
Claim 12
Dependent Claim
48 words
The method of claim 10 in which the carboxyl-terminated polyester is a half-ester of the structure: ##STR2## where X is the residue of a polyol after reaction with a 1,2-dicarboxylic anhydride, R is an organic moiety associated with the anhydride and A is equal to at least 2.
Claim 13
Dependent Claim
29 words
The method of claim 1 in which the polyacid curing agent is present in amounts of 10 to 90 percent by weight based on total weight of resin solids.
Claim 14
Dependent Claim
19 words
The method of claim 1 in which the equivalent ratio of carboxyl to epoxy is from 0.3 to 3.0:1.
Claim 15
Dependent Claim
20 words
The method of claim 1 in which the crosslinkable composition has a resin solids content of at least 45 percent.
Claim 16
Dependent Claim
9 words
An article coated by the method of claim 1.
Claim 17
Dependent Claim
9 words
An article coated by the method of claim 2.
Claim 18
Dependent Claim
9 words
An article coated by the method of claim 11.
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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) | 1991-04-12 | 1991-10-12 | 1992-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-12 | 1995-10-12 | 1996-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-12 | 1999-10-12 | 2000-04-12 | $7700.00 | Window Closed / Lapsed |