US4707381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for finish coating on polyurethane formed articles
Assignee: Nissan Motor Co Ltd
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Filing: 1986-05-22
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Granted: 1987-11-17
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Expires: 2006-05-22
Abstract
Abstract A method for finish coating on polyurethane formed articles, which comprises formulating a finish coating composition so as to have a content of pyrrolidone or its derivative represented by the general formula <IMAGE> (I) in which R stands for hydrogen or an alkyl group having at the most 4 carbon atoms, in an amount of 5-40% by weight upon the coating, applying this finish coating composition on the polyurethane formed article directly and heating the so called polyurethane formed article at a temperature of at least 50 DEG C. but lower than the thermal deformation temperature of the polyurethane formed article, said method being capable of attaining a coating layer exhibiting both the properties for a primer coat, namely, a better adhesion onto polyurethane formed articles, and for a finish coat, namely, better weather resistance, higher chemical resistance, favorable appearance and so on, with only a single application and permitting thus to dispense with the primer coating and the heat drying procedure therefor.
Inventors
- 👤 Takashi Toyama
- 👤 Masashi Ohno
- 👤 Kiminori Ishii
- 👤 Shosaku Yamamoto
- 👤 Kazuo Kakinuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:04
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3415; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/044; C08J7/046; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
194 words
A method for finish coating a shaped, polyurethane article, which comprises: coating directly on the surface of a polyurethane article which has not been coated with a primer, a first coating layer of a finish paint composition comprising a first film-forming paint component selected from the group consisting of (1) a single-liquid thermosetting paint comprising a polyester resin or an acrylic resin, in combination with a cross-linking component selected from the group consisting of an aminoplast, a blocked aliphatic isocyanate and a blocked cycloaliphatic isocyanate, (2) a two-liquid urethane paint comprising a polyester resin or an acrylic resin, in combination with a cross-linking component selected from the group consisting of an aliphatic isocyanate and a cycloaliphatic isocyanate, and (3) a lacquer paint made from an acrylic resin, nitrocellulose or cellulose acetate butyrate, said finish paint composition containing from 5 to 40% by weight of at least one compound having the formula ##STR3## wherein R is hydrogen or alkyl having up to 4 carbon atoms; then heating the coated polyurethane article at a temperature of at least 50° C., but lower than the thermal deformation temperature of the polyurethane article, to cure said coating layer.
Claim 2
Independent Claim
194 words
A method for finish coating a shaped, polyurethane article, which comprises: coating directly on the surface of a polyurethane article which has not been coated with a primer, a first coating layer of a finish paint composition comprising a first film-forming paint component selected from the group consisting of (1) a single-liquid thermosetting paint comprising a polyester resin or an acrylic resin, in combination with a cross-linking component selected from the group consisting of an aminoplast, a blocked aliphatic isocyanate and a blocked cycloaliphatic isocyanate, (2) a two-liquid urethane paint comprising a polyester resin or an acrylic resin, in combination with a cross-linking component selected from the group consisting of an aliphatic isocyanate and a cycloaliphatic isocyanate, and (3) a lacquer paint made from an acrylic resin, nitrocellulose or cellulose acetate butyrate, said finish paint composition containing from 5 to 40% by weight of at least one compound having the formula ##STR3## wherein R is hydrogen or alkyl having up to 4 carbon atoms; then heating the coated polyurethane article at a temperature of at least 50° C., but lower than the thermal deformation temperature of the polyurethane article, to cure said coating layer.
Claim 3
Dependent Claim
26 words
A method according to claim 1, wherein said compound is at least one compound selected from the group consisting of 2-pyrrolidone, N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, N-propyl-2-pyrrolidone and N-butyl-2-pyrrolidone.
Claim 4
Dependent Claim
54 words
A method according to claim 1, wherein after said coating step and before said heating step, the coated polyurethane article is coated with a topcoat of a transparent or clear lacquer, both of said coating layer and said topcoat comprising an acrylic resin or a polyester resin, in combination with an aminoplast or isocyanate.
Claim 5
Dependent Claim
32 words
A method according to claim 3 in which said first coating layer has a high content of pigment and said topcoat is free of pigment or contains a low content of pigment.
Claim 6
Dependent Claim
37 words
A method according to claim 4 in which said first coating layer contains from 3 to 95% by weight of said first film-forming paint component and the weight ratio of pigment/film-forming paint component is up to 3/1.
Claim 7
Dependent Claim
39 words
A method according to claim 1 in which said first coating layer contains pigment and from 3 to 95% by weight of said first film-forming paint component and the weight ratio of pigment/film-forming paint component is up to 3/1.
Claim 8
Dependent Claim
21 words
A method according to claim 1 in which said finish paint composition contains from zero to 92% by weight, of solvent.
Claim 9
Dependent Claim
36 words
A method according to claim 1 in which said first coating layer is an external decorative coating which is superior in weather resistance, has a pleasing aesthetic appearance and is capable of dissolving in said component.
References Cited (Backward Citations)
GB862845A
Cited
GB910997A
Cited
GB1136594A
Cited
GB1124761A
Cited
US3497468A
Cited
US3639147A
Cited
GB1337941A
Cited
US3962369A
Cited
GB1458091A
Cited
US3893727A
Cited
US4152313A
Cited
US4315053A
Cited
US4250073A
Cited
US4529632A
Cited
GB2150934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |