US4620994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color plus clear coating system utilizing organo-modified clay
Assignee: PPG Industries Inc
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Filing: 1984-03-30
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Granted: 1986-11-04
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Expires: 2004-03-30
Abstract
Abstract Disclosed is a method for coating a substrate comprising the steps of: (A) coating the substrate with one or more applications of a basecoating composition comprising (1) an organic film-forming resin, (2) an organo-modified clay stably dispersed in the basecoating composition, (3) a solvent system for the film-forming resin, and (4) pigment particles, to form a basecoat; and (B) coating the basecoat with one or more applications of a topcoating composition comprising (1) an organic film-forming resin, and (2) a solvent system for the organic film-forming resin of the topcoating composition, to form a transparent topcoat.
Inventors
- 👤 Naomi R. Suss
- 👤 Samuel Porter, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:51
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/50; B05D7/52; B05D7/53; B05D7/532; B05D5/00; B05D5/06; B05D5/067; B05D5/068
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
234 words
A method of coating a substrate comprising the steps of: (A) coating a substrate with one or more applications of a basecoating composition comprising: (1) an organic film-forming resin, and where the film-forming resin can be crosslinked, optionally a crosslinking agent for the film-forming resin, (2) an organo-modified clay stable dispersed in the basecoating composition wherein the organo-modified clay is derived from an organic cation, an organic anion and a smectite-type clay and said organo-modified clay is present in the basecoating composition in an amount ranging from about 1 to about 20 percent by weight based on the weight of organic film-forming resin, optional crosslinking agent, and organo-modified clay, (3) a solvent system for the film-forming resin, and (4) pigment particles to form a basecoat; and thereafter before a substantial amount of drying or curing of said basecoat has occured; (B) coating the basecoat with one or more applicaitons of a topcoating composiiton comprising: (1) an organic film-forming resin, which may be the same as or different from the film-forming resin of the basecoating composition, and where the film-forming resin of the topcoating composition can be crosslinked, optionally a crosslinking agent for the film-forming resin of the topcoating composition, and (2) a solvent system for the organic film-forming resin of the topcoating composition to form a transparent topcoat; wherein, after said steps (A) and (B), said basecoat and said topcaot dry or cure together.
Claim 2
Independent Claim
234 words
A method of coating a substrate comprising the steps of: (A) coating a substrate with one or more applications of a basecoating composition comprising: (1) an organic film-forming resin, and where the film-forming resin can be crosslinked, optionally a crosslinking agent for the film-forming resin, (2) an organo-modified clay stable dispersed in the basecoating composition wherein the organo-modified clay is derived from an organic cation, an organic anion and a smectite-type clay and said organo-modified clay is present in the basecoating composition in an amount ranging from about 1 to about 20 percent by weight based on the weight of organic film-forming resin, optional crosslinking agent, and organo-modified clay, (3) a solvent system for the film-forming resin, and (4) pigment particles to form a basecoat; and thereafter before a substantial amount of drying or curing of said basecoat has occured; (B) coating the basecoat with one or more applicaitons of a topcoating composiiton comprising: (1) an organic film-forming resin, which may be the same as or different from the film-forming resin of the basecoating composition, and where the film-forming resin of the topcoating composition can be crosslinked, optionally a crosslinking agent for the film-forming resin of the topcoating composition, and (2) a solvent system for the organic film-forming resin of the topcoating composition to form a transparent topcoat; wherein, after said steps (A) and (B), said basecoat and said topcaot dry or cure together.
Claim 3
Dependent Claim
29 words
The method of claim 1 wherein the organic film-forming resin of the basecoating composition comprises a crosslinkable resin having a weight average molecular weight of from 300 to 20,000.
Claim 4
Dependent Claim
32 words
The method of claim 1 wherein the basecoating composition is applied to the substrate at a total solids content of at least 35 percent by weight of the basecoating composition by spraying.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein at least a portion of the pigment particles are metallic flakes.
Claim 6
Dependent Claim
17 words
The method of claim 2 wherein the basecoating composition contains a crosslinking agent for the crosslinkable resin.
Claim 7
Dependent Claim
18 words
The method of claim 1 wherein the topcoating composition further comprises organic polymer microparticles and an organo-modified clay.
Claim 8
Dependent Claim
11 words
The method of claim 6 wherein said organo-modified clay is organophilic.
Claim 9
Dependent Claim
78 words
The method of claim 1 wherein the organic film-forming resin of the basecoating composition comprises a crosslinkable resin having a weight average molecular weight of from 300 to 20,000; the basecoating composition contains a crosslinking agent for the crosslinkable resin; at least a portion of the pigment particles are metallic flakes; and the basecoating composition is applied to the substrate by spraying at a total solids content of at least 35 percent by weight of the basecoating composition.
Claim 10
Dependent Claim
17 words
The method of claim 8 wherein the basecoating composition comprises a crosslinking agent which is an aminoplast.
Claim 11
Dependent Claim
25 words
The method of claim 9 wherein the organic film-forming resin of the basecoating composition comprises an acrylic resin capable of being crosslinked by the aminoplast.
Claim 12
Dependent Claim
14 words
The method of claim 1 wherein the topcoating composition further comprises an organo-modified clay.
Claim 13
Dependent Claim
14 words
The method of claim 1 wherein the topcoating composition further comprises organic polymer microparticles.
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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) | 1989-11-03 | 1990-05-05 | 1990-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-03 | 1994-05-05 | 1994-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-03 | 1998-05-05 | 1998-11-04 | $7700.00 | Window Closed / Lapsed |