Patent US5029130A successfully refreshed from Google Patents.
Patent US5322865A successfully refreshed from Google Patents.
US5322865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous color paint compositions and coating method using same
Assignee: Kansai Paint Co Ltd
•
Filing: 1993-01-28
•
Granted: 1994-06-21
•
Expires: 2013-01-28
Abstract
Abstract An aqueous color paint composition comprising (I) an aqueous dispersion of acrylic polymer fine particles, (II) a modified polyester resin aqueous dispersion obtained by neutralizing, with a basic substance, a modified polyester resin formed by polymerizing (A) a radical-polymerizable unsaturated group-containing polyester resin and (B) a mixture of an ethylenically unsaturated carboxylic acid and another copolymerizable unsaturated monomer and having an acid value of 8 to 200 and a hydroxyl value of 30 to 300, and dispersing the resulting resin in an aqueous dispersion medium, (III) a crosslinking agent, and (IV) a color pigment. The composition is, even if high-solid, good in coatability and excellent in smoothness of the coated film. It is therefore quite suitable as a high-solid base coat composition when coating an outside plate, etc. of automobiles, two-wheelers, electric appliances, etc. requiring beautiful appearance.
Inventors
- 👤 Hiroshi Inoue
- 👤 Hiromi Harakawa
- 👤 Akira Kasari
- 👤 Kenya Suzuki
- 👤 Yoshinori Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:54
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/50; B05D7/52; B05D7/53; B05D7/532; C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/066; C09D167/00; C09D167/06; B05D2502/00; C08; C08L; C08L67/00; C08L67/06
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
147 words
An aqueous color paint composition comprising (I) an aqueous dispersion of acrylic polymer fine particles, (II) a modified polyester resin aqueous dispersion obtained by neutralizing, with a basic substance, a modified polyester resin which has an acid value of 80 to 200 and a hydroxyl value of 30 to 300, and which is formed by polymerizing (a) an ethylenically unsaturated group-containing polyester resin which is obtained by reacting a polyester resin containing a carboxyl group and a hydroxyl group with at least one monomer selected from the group consisting of (1) an epoxy group-containing ethylenically unsaturated monomer, (2) an isocyanate group-containing ethylenically unsaturated monomer and (3) an acid anhydride group-containing polymerizable unsaturated monomer, and (b) a mixture of an ethylenically unsaturated carboxylic acid and another copolymerizable unsaturated monomer, and dispersing the resulting resin in an aqueous dispersion medium, (III) a melamine resin, and (IV) a color pigment.
Claim 2
Dependent Claim
147 words
An aqueous color paint composition comprising (I) an aqueous dispersion of acrylic polymer fine particles, (II) a modified polyester resin aqueous dispersion obtained by neutralizing, with a basic substance, a modified polyester resin which has an acid value of 80 to 200 and a hydroxyl value of 30 to 300, and which is formed by polymerizing (a) an ethylenically unsaturated group-containing polyester resin which is obtained by reacting a polyester resin containing a carboxyl group and a hydroxyl group with at least one monomer selected from the group consisting of (1) an epoxy group-containing ethylenically unsaturated monomer, (2) an isocyanate group-containing ethylenically unsaturated monomer and (3) an acid anhydride group-containing polymerizable unsaturated monomer, and (b) a mixture of an ethylenically unsaturated carboxylic acid and another copolymerizable unsaturated monomer, and dispersing the resulting resin in an aqueous dispersion medium, (III) a melamine resin, and (IV) a color pigment.
Claim 3
Dependent Claim
26 words
The composition of claim 1 wherein the acrylic polymer fine particles of the aqueous dispersion (I) have an average particle size of 0.02 to 1 micrometer.
Claim 4
Dependent Claim
18 words
The composition of claim 1 wherein the acrylic polymer fine particles of the aqueous dispersion (I) are crosslinked.
Claim 5
Dependent Claim
23 words
The composition of claim 1 wherein the modified polyester resin of the aqueous dispersion (II) has an acid value of 8 to 150.
Claim 6
Dependent Claim
23 words
The composition of claim 1 wherein the modified polyester resin of the aqueous dispersion (II) has a hydroxyl value of 40 to 200.
Claim 7
Dependent Claim
25 words
The composition of claim 1 wherein the modified polyester resin of the aqueous dispersion (II) has a number average molecular weight of 500 to 15,000.
Claim 8
Dependent Claim
36 words
The composition of claim 1 wherein the unsaturated monomers (1) to (3) are reacted in a proportion of 0.2 to 5 mols per molecule of the polyester resin containing the carboxyl group and the hydroxyl group.
Claim 9
Dependent Claim
25 words
The composition of claim 1 wherein the ethylenically unsaturated carboxylic acid/other copolymerizable unsaturated monomer weight ratio in the monomer mixture (B) is 2/98 to 30/70.
Claim 10
Dependent Claim
14 words
The composition of claim 1 wherein the ethylenically unsaturated carboxylic acid is (meth)acrylic acid.
Claim 11
Dependent Claim
36 words
The composition of claim 1 wherein the other copolymerizable unsaturated monomer is at least one monomer selected from the group consisting of an alkyl or cycloalkyl (meth)acrylate, a vinyl aromatic compound, (meth)acrylonitrile, and a hydroxyalkyl (meth)acrylate.
Claim 12
Dependent Claim
25 words
The composition of claim 1 wherein the polyester (A) and the monomer mixture (B) are polymerized at a (A)/(B) weight ratio of 20/80 to 90/10.
Claim 13
Dependent Claim
22 words
The composition of claim 1 wherein the melamine resin is a mixture of a hydrophilic melamine resin and a hydrophobic melamine resin.
Claim 14
Dependent Claim
27 words
The composition of claim 1 wherein the color pigment (IV) is selected from the group consisting of a metallic pigment and an inorganic or organic color pigment.
Claim 15
Dependent Claim
57 words
The composition of claim 1 wherein based on the total solids content of the aqueous dispersion (I) of acrylic polymer fine particles and the modified polyester resin aqueous dispersion (II), the proportion of the aqueous dispersion (I) is 10 to 90% by weight and the proportion of the aqueous dispersion (II) is 90 to 10% by weight.
Claim 16
Dependent Claim
38 words
The composition of claim 1 wherein the proportion of the melamine resin (III) is 15 to 70 parts by weight per 100 parts by weight, as a solids content, in total of the aqueous dispersions (I) and (II).
Claim 17
Dependent Claim
38 words
The composition of claim 1 wherein the proportion of the color pigment (IV) is 2 to 200 parts by weight per 100 parts by weight, as a solids content, in total of the aqueous dispersions (I) and (II).
Claim 18
Dependent Claim
15 words
The composition of claim 1 wherein the solids content is 10 to 45% by weight.
Claim 19
Dependent Claim
18 words
The composition of claim 1 wherein viscosity is 800 to 5,000 cps/6 rpm measured by a B-type viscometer.
Claim 20
Dependent Claim
43 words
A coating method which comprises coating the aqueous color paint composition of claim 1 as a base coat composition on a product being coated, coating a clear topcoat on the uncured coated product, and heat-curing both the coated films at the same time.
Claim 21
Dependent Claim
15 words
A coated article which is coated with the aqueous color paint composition of claim 1.
References Cited (Backward Citations)
US4414357A
Cited
US4403003A
Cited
US4539363A
Cited
US4459379A
Cited
JPS57207654A
Cited
EP0072979A2
Cited
US4504609A
Cited
US4518724A
Cited
GB2131437A
Cited
JPS62127363A
Cited
US4900774A
Cited
US4952626A
Cited
EP0291271A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-06-20 | 1997-12-20 | 1998-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-20 | 2001-12-20 | 2002-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-20 | 2005-12-20 | 2006-06-21 | $7700.00 | Window Closed / Lapsed |