US4948829A
Expired / Lapsed
US
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Aqueous coating composition and coating method using same
Assignee: Kansai Paint Co Ltd
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Filing: 1989-05-05
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Granted: 1990-08-14
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Expires: 2009-05-05
Abstract
Abstract Disclosed are (1) an aqueous coating composition which is characterized in that the composition comprises: (A) an acrylic resin-type emulsion, (B) a urethane resin-type emulsion and (C) a crosslinking agent the component (B) being a self-emulsifiable urethane emulsion prepard by subjecting a urethane prepolymer to reaction for chain extension by water and to emulsification after or during neutralization of the urethane prepolymer with a tertiary amine, the urethane prepolymer consisting essentially of (i) an aliphatic and/or alicyclic diisocyanate, (ii) a polyether diol and/or polyester diol both having a number-average molecular weight of about 500 to about 5000, (iii) a low-molecular weight polyhydroxyl compound and (iv) a dimethylolalkanoic acid in an NCO/OH ratio by equivalent of 1.1-1.9/1; and (2) a two-coat one-bake coating method characterized by use of said aqueous coating composition as the base-coat composition.
Inventors
- 👤 Masaru Mitsuji
- 👤 Mistugu Endo
- 👤 Youji Kawachi
- 👤 Akira Asada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:53
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0819; C08G18/0823; C09D175/00; C09D175/04; B; B05; B05D; B05D7/00; B05D7/50; B05D7/52; B05D7/53; B05D7/532; C08L; C08L61/00; C08L61/20; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
173 words
An aqueous coating composition comprising: (A) a hydroxy group-containing acrylic resin-type emulsion prepared by subjecting to emulsion polymerization at least one acrylic monomer selected from the group consisting of hydroxy group-containing (C 2 -C 10 alkyl) acrylates and hydroxy group-containing (C 2 -C 10 alkyl) methacrylates, (B) a urethane resin-type emulsion and (C) a crosslinking agent which is at least one member selected from the group consisting of a melamine resin and a phenol formaldehyde resin, the component (B) being a self-emulsifiable urethane emulsion prepared by subjecting a urethane prepolymer to reaction for chain extension by water and to emulsification after or during neutralization of the urethane prepolymer with a tertiary amine, the urethane prepolymer consisting essentially of (i) at 1east one of an aliphatic diisocyanate and an alicyclic diisocyanate, (ii) at 1east one of a polyether diol and a polyester diol both having a number-average molecular weight of about 500 to about 5000, (iii) a low-molecular weight polyhydroxyl compound and (iv) a dimethylolalkanoic acid in an NCO/OH ratio by equivalent of 1.1-1.9/1.
Claim 2
Dependent Claim
173 words
An aqueous coating composition comprising: (A) a hydroxy group-containing acrylic resin-type emulsion prepared by subjecting to emulsion polymerization at least one acrylic monomer selected from the group consisting of hydroxy group-containing (C 2 -C 10 alkyl) acrylates and hydroxy group-containing (C 2 -C 10 alkyl) methacrylates, (B) a urethane resin-type emulsion and (C) a crosslinking agent which is at least one member selected from the group consisting of a melamine resin and a phenol formaldehyde resin, the component (B) being a self-emulsifiable urethane emulsion prepared by subjecting a urethane prepolymer to reaction for chain extension by water and to emulsification after or during neutralization of the urethane prepolymer with a tertiary amine, the urethane prepolymer consisting essentially of (i) at 1east one of an aliphatic diisocyanate and an alicyclic diisocyanate, (ii) at 1east one of a polyether diol and a polyester diol both having a number-average molecular weight of about 500 to about 5000, (iii) a low-molecular weight polyhydroxyl compound and (iv) a dimethylolalkanoic acid in an NCO/OH ratio by equivalent of 1.1-1.9/1.
Claim 3
Dependent Claim
49 words
An aqueous coating composition according to claim 1 wherein the component (ii) is at least one member having a number-average molecular weight of about 1000 to about 3000 and selected from the group consisting of polypropylene glycol, polytetramethylene ether glycol, polycaprolactone diol, poly-3-methylpentyl adipate diol and polyneopentyl/hexyl adipate diol.
Claim 4
Dependent Claim
26 words
An aqueous coating composition according to claim 1 wherein the low-molecular weight polyhydroxyl compound (iii) is one having a number-average molecular weight of 500 or less.
Claim 5
Dependent Claim
30 words
An aqueous coating composition according to claim 1 wherein the component (iii) is at least one member selected from the group consisting of ethylene glycol, 1,4-butane diol, trimethylolpropane and 1,6-hexanediol.
Claim 6
Dependent Claim
30 words
An aqueous coating composition according to claim 1 wherein the acrylic resin-type emulsion (A) is one prepared by subjecting to emulsion polymerization said acrylic monomer and α,β-ethylenically unsaturated carboxylic acid.
Claim 7
Dependent Claim
18 words
An aqueous coating composition according to claim 1 wherein the crosslinking agent (C) is a hydrophobic melamine resin.
Claim 8
Dependent Claim
21 words
An aqueous coating composition according to claim 1 wherein the ratio of component (A) /component (C) is between 90/10 and 60/40.
Claim 9
Dependent Claim
25 words
An aqueous coating composition according to claim 1 wherein the ratio of mixture of components (A) and (C)/ component (B) is between 95/5 and 20/80.
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) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-13 | 1998-02-12 | 1998-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-13 | 2002-02-12 | 2002-08-14 | $7700.00 | Window Closed / Lapsed |