Patent US5009936A successfully refreshed from Google Patents.
US5009936A
Expired / Lapsed
US
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Method for forming tranparent multilayers
Assignee: Nissan Motor Co Ltd
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Filing: 1989-09-05
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Granted: 1991-04-23
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Expires: 2009-09-05
Abstract
Abstract A method for forming a transparent multilayer is described, using a wet-on-wet process in which first a transparent acrylic copolymer paint A and then a transparent fluorine-containing polymer paint B comprising the formula ##STR1## wherein X represents a fluorine atom or chlorine atom, and R 1 , R 2 , R 3 , R 4 each represents represents a hydrogen atom, hydroxyalkyl group, or carboxyalkyl group, are applied on a conventional finish coating. The method produces a protective multilayer consisting of a paint A layer to improve adhesion and a paint B layer to improve weatherability on the conventional finish coatings.
Inventors
- 👤 Masahiko Yamanaka
- 👤 Motoyoshi Hanaoka
- 👤 Hiroaki Konse
- 👤 Haruhisa Shigeno
- 👤 Masakatsu Kinoshita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:14
CPC Classifications
C; C09; C09D; C09D127/00; C09D127/02; C09D127/12; B; B05; B05D; B05D5/00; B05D7/00; B05D7/50; B05D7/56; B05D7/58; B05D7/587; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6275; C08G18/6279; B05D2202/00; B05D5/08; B05D5/083; C08L; C08L61/00; C08L61/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
129 words
A method for forming a transparent multilayer wherein first a transparent paint A comprising a film forming amount of an acrylic copolymer, wherein monomers incorporated to form the acrylic copolymer have an average molecular weight of from 5,000 to 30,000, a hydroxyl value per gram of solid content of from 30 to 100, and an acid value of from 5 to 20, and then a film forming amount of a transparent paint B, which is dissolved in organic solvent, of fluorine containing polymer comprising the formula ##STR5## wherein X represents a fluorine or chlorine atom, and R 1 , R 2 , R 3 , and R 4 each represents a hydrogen atom, hydroxyalkyl group, or carboxyalkyl group, are applied on a conventional finish coating with a wet-on-wet process.
Claim 2
Independent Claim
129 words
A method for forming a transparent multilayer wherein first a transparent paint A comprising a film forming amount of an acrylic copolymer, wherein monomers incorporated to form the acrylic copolymer have an average molecular weight of from 5,000 to 30,000, a hydroxyl value per gram of solid content of from 30 to 100, and an acid value of from 5 to 20, and then a film forming amount of a transparent paint B, which is dissolved in organic solvent, of fluorine containing polymer comprising the formula ##STR5## wherein X represents a fluorine or chlorine atom, and R 1 , R 2 , R 3 , and R 4 each represents a hydrogen atom, hydroxyalkyl group, or carboxyalkyl group, are applied on a conventional finish coating with a wet-on-wet process.
Claim 3
Dependent Claim
51 words
A method for forming a transparent multilayer as in claim 1, wherein monomers incorporated to form the acrylic copolymer have an average molecular weight of from 10,000 to 20,000, a hydroxyl value per gram of solid content of from 45 to 80, and an acid value of from 8 to 15.
Claim 4
Dependent Claim
48 words
A method for forming a transparent multilayer as in claim 1, wherein the fluorine-containing polymer has a number average molecular weight of from 3,000 to 20,000, a hydroxyl value per gram of solid content of from 45 to 110, and an acid value of from 5 to 12.
Claim 5
Dependent Claim
23 words
A method for forming a transparent multilayer as in claim 3, wherein said fluorine containing polymer is cured with a cross linking agent.
Claim 6
Dependent Claim
39 words
A method for forming a transparent multilayer as in claim 4, wherein said cross linking agent is a melamine resin and the blending ratio of fluorine-containing polymers to amino resin is in the range of 100:25-70 parts by weight.
Claim 7
Dependent Claim
50 words
A method for forming a transparent multilayer as in claim 4, wherein said fluorine-containing polymer is cured with a polyisocyanate compound cross linking agent, and the blending ratio of polyisocyanate compound to the fluorine-containing polymer is in the range of from 0.3 to 1.5 (mol ratio of isocyanate group/hydroxyl group).
Claim 8
Dependent Claim
29 words
A method for forming a transparent multilayer as in claim 1, wherein said transparent paint A is applied at a thickness of from 5 to 20 microns (dry thickness).
Claim 9
Dependent Claim
32 words
A method for forming a transparent multilayer as in claim 7, wherein transparent paint B is applied at a thickness of from 20 to 40 microns (dry thickness) on transparent paint A.
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) | 1994-04-22 | 1994-10-22 | 1995-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-22 | 1998-10-22 | 1999-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-22 | 2002-10-22 | 2003-04-23 | $7700.00 | Window Closed / Lapsed |