EP0269059A2
Expired / Lapsed
EP
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Aqueous polymer dispersion for use in automotive basecoat under solvent clear coat
Assignee: EIDP Inc
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Filing: 1987-11-24
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Granted: —
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Expires: 2007-11-24
Abstract
Abstract An aqueous acrylic dispersion with higher polarity outside than inside the particles is useful in an automotive basecoat under a solvent-based clear coat.
Inventors
- 👤 Armand Aerts
- 👤 Peter Simmendinger
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 05:00
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/50; B05D7/52; B05D7/53; B05D7/532; C; C08; C08F; C08F220/00; C08F220/02; C08F220/04; C08F246/00; B05D2451/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
82 words
An aqueous dispersion of acrylic polymer particles which are not internally crosslinked but which contain functionality that can be crosslinked upon curing a coating made from such dispersion, said particles being made by emulsion polymerization starting with all ingredients as monomers, including, based on the total weight of polymerizable monomers, 3-30% of monomer selected from acrylonitrile, methacrylonitrile, acrylamide and methacrylamide, 2-30% polymerizable unsaturated acid, 0-30% polymerizable unsaturated monomer containing a hydroxyl group, the balance polymerizable monomer, said particles being insoluble in methylethylketone.
Claim 2
Dependent Claim
82 words
An aqueous dispersion of acrylic polymer particles which are not internally crosslinked but which contain functionality that can be crosslinked upon curing a coating made from such dispersion, said particles being made by emulsion polymerization starting with all ingredients as monomers, including, based on the total weight of polymerizable monomers, 3-30% of monomer selected from acrylonitrile, methacrylonitrile, acrylamide and methacrylamide, 2-30% polymerizable unsaturated acid, 0-30% polymerizable unsaturated monomer containing a hydroxyl group, the balance polymerizable monomer, said particles being insoluble in methylethylketone.
Claim 3
Dependent Claim
51 words
The dispersion of Claim 1 wherein the acrylic monomers include, in percent by weight based on the particles: 3-15% acrylonitrile; 3-15% hydroxypropylmethacrylate or acrylate; up to 30% styrene; up to 3% acrylic acid; and water soluble initiator; and the balance acrylic or methacrylic monomer having a glass transition temperature below -20°C.
Claim 4
Dependent Claim
14 words
The dispersion of Claim 2 wherein the monomer of the balance is butyl acrylate.
Claim 5
Dependent Claim
18 words
The dispersion of Claim 2 having an average particle size in the range of 0.16 - 0.19 µm.
Claim 6
Dependent Claim
13 words
The dispersion of Claim 2 having a pH of about 7.5 - 7.9.
Claim 7
Dependent Claim
18 words
The dispersion of Claim 2 wherein the particles have a weight average molecular weight of about 2 million.
Claim 8
Dependent Claim
18 words
An aqueous coating composition suitable for use at an automotive base coat, comprising a dispersion of claim 1.
Claim 9
Dependent Claim
22 words
A multi-layer coating system on a substrate comprising a basecoat of a dispersion of Claim 1 overlaid with a solvent-based clear coat.
Claim 10
Dependent Claim
18 words
The system of Claim 8 wherein there is no significant interpenetration of the clear coat into the basecoat.
Claim 11
Dependent Claim
37 words
A process of applying a multi-layer coating system of Claim 8 to a substrate in which the baseocat is applied, and before it is cured, the clear coat is applied, then the multi-layer system is cured together.
References Cited (Backward Citations)
No citation records indexed.
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