US4463038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallic coating using two coat one bake method
Assignee: Nippon Paint Co Ltd
•
Filing: 1982-09-28
•
Granted: 1984-07-31
•
Expires: 2002-09-28
Abstract
Abstract There is provided a two-coat, one-bake metallic coating method which comprises applying, first, (a) a base coat composition containing an acrylic polyol oligomer having an average molecular weight of 500 to 2000 and a non-yellowing polyisocyanate compound in a NCO/OH ratio of 0.5/1 through 1/0.5 and further containing an appropriate amount of a metallic pigment and, then, on top thereof (b) a clear top coat composition containing said acrylic polyol oligomer and non-yellowing polyisocyanate compound in a NCO/OH ratio of 0.5/1 through 1/0.5 and causing the resulting coats to cure simultaneously. There are also provided coating compositions to be used in the above coating method.
Inventors
- 👤 Kunihiko Takeuchi
- 👤 Hidefumi Okuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:30
CPC Classifications
B; B05; B05D; B05D5/00; B05D5/06; B05D5/067; B05D5/068; B05D7/00; B05D7/50; B05D7/52; B05D7/53; B05D7/532; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6216; C08G18/622; C08G18/6225; C08G18/6229; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/751; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08G18/792; C08K; C08K3/00; C08K3/01; C08K3/013; C08L; C08L1/00; C08L1/08; C08L61/00; C08L61/20; C08L61/26; C08L61/28; C08L75/00; C08L75/04; C09; C09D; C09D175/00; C09D175/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
187 words
In a two-coat, one-bake metallic coating method wherein a base coat composition containing a first film-forming binder, a metallic pigment and a solvent for said first film-forming binder is applied, a clear top coat composition containing a second film-forming binder and a solvent thereof is applied wet-on-wet onto the base coat, and the resulting multicoat is cured simultaneously, the improvement which comprises employing as said first film-forming binder one consisting essentially of (a) a hydroxyl group-containing acrylic oligomer having an average molecular weight of 500 to 2000, (b) a non-yellowing polyisocyanate in an NCO--OH ratio of 0.5/1 to 1/0.5 relative to said acrylic oligomer, or a combination thereof with up to 30 percent by weight of the polyol (as non-volatile solids) of a melamine resin; and (c) a film-forming cellulose derivative; and as said second film-forming binder one consisting essentially of an acrylic oligomer as defined hereinabove, and a polyisocyanate as defined hereinabove, in an NCO/OH ratio of 0.5/1 to 1/0.5 relative to said acrylic oligomer, of a combination thereof with up to 30 percent by weight of the polyol (as non-volatile solids) of a melamine resin.
Claim 2
Dependent Claim
187 words
In a two-coat, one-bake metallic coating method wherein a base coat composition containing a first film-forming binder, a metallic pigment and a solvent for said first film-forming binder is applied, a clear top coat composition containing a second film-forming binder and a solvent thereof is applied wet-on-wet onto the base coat, and the resulting multicoat is cured simultaneously, the improvement which comprises employing as said first film-forming binder one consisting essentially of (a) a hydroxyl group-containing acrylic oligomer having an average molecular weight of 500 to 2000, (b) a non-yellowing polyisocyanate in an NCO--OH ratio of 0.5/1 to 1/0.5 relative to said acrylic oligomer, or a combination thereof with up to 30 percent by weight of the polyol (as non-volatile solids) of a melamine resin; and (c) a film-forming cellulose derivative; and as said second film-forming binder one consisting essentially of an acrylic oligomer as defined hereinabove, and a polyisocyanate as defined hereinabove, in an NCO/OH ratio of 0.5/1 to 1/0.5 relative to said acrylic oligomer, of a combination thereof with up to 30 percent by weight of the polyol (as non-volatile solids) of a melamine resin.
Claim 3
Dependent Claim
22 words
The method as claimed in claim 1 wherein at least one of said first and second film-forming binders contains said melamine resin.
Claim 4
Dependent Claim
16 words
The method as claimed in claim 1 wherein said melamine resin is absent from both binders.
Claim 5
Dependent Claim
27 words
The method as claimed in claim 1 wherein at least one said base coat and clear top coat compositions further contains an ultraviolet absorber and an antioxidant.
Claim 6
Dependent Claim
27 words
The method as claimed in claim 1 wherein said acrylic oligomer has an OH number of 50 to 300 and an acid number of 5 to 50.
Claim 7
Dependent Claim
38 words
The method as claimed in claim 1 wherein said metallic pigment is present in said base coat composition in a proportion of 2 to 20 parts by weight per 100 parts by weight of said first film-forming binder.
Claim 8
Dependent Claim
33 words
The method as claimed in claim 6 wherein a coloring pigment is present in said base coat composition in a proportion of 5 to 200 parts by weight of said first film-forming binder.
Claim 9
Dependent Claim
92 words
A method according to claim 1 wherein said melamine resin is absent from both binders; wherein at least one of said base coat and clear top coat compositions further contains an ultraviolet absorber and an antioxidant; wherein said acrylic oligomer has an OH number of 50 to 300 and an acid number of 5 to 50; wherein said metallic pigment is an aluminum pigment and is present in said base coat composition in a proportion of 2 to 20 parts by weight per 100 parts by weight of said first film-forming binder.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |