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US4987178A
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Cationically electrodepositable finely divided gelled polymer and cationically electrodepositable coating composition containing same
Assignee: Kansai Paint Co Ltd
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Filing: 1988-03-10
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Granted: 1991-01-22
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Expires: 2008-03-10
Abstract
Abstract A cationically electrodepositable finely divided gelled polymer obtained by dispersing an acrylic copolymer containing a hydrolyzable alkoxysilane group and a cationic group in water and crosslinking the dispersed copolymer particles thereinside. A cationically electrodepositable coating composition containing the aforesaid polymer can form a thick coated film having excellent smoothness on an edge portion of a corner or a projected portion to improve the anticorrosion of the edge portion.
Inventors
- 👤 Terukazu Shibata
- 👤 Akira Tominaga
- 👤 Tadayoshi Hiraki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:51
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4488; C09D5/4492
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
36 words
A cationically electrodepositable finely divided gelled polymer obtained by dispersing an acrylic copolymer containing a hydrolyzable alkoxysilane group and an acid-neutralized cationic group in water to form dispersed copolymer particles and crosslinking said dispersed copolymer particles.
Claim 2
Dependent Claim
36 words
A cationically electrodepositable finely divided gelled polymer obtained by dispersing an acrylic copolymer containing a hydrolyzable alkoxysilane group and an acid-neutralized cationic group in water to form dispersed copolymer particles and crosslinking said dispersed copolymer particles.
Claim 3
Dependent Claim
17 words
The finely divided gelled polymer of claim 1 wherein the cationic group is a tertiary amino group.
Claim 4
Dependent Claim
54 words
The finely divided gelled polymer of claim 2 wherein the acrylic copolymer is a copolymer composed of, as essential components, (a) a polymerizable unsaturated vinylsilane monomer containing a polymerizable unsaturated double bond and a hydrolyzable alkoxysilane group and (b) a polymerizable unsaturated monomer containing a polymerizable unsaturated double bond and a tertiary amino group.
Claim 5
Dependent Claim
87 words
The finely divided gelled polymer of claim 2 wherein the acrylic copolymer is an acrylic copolymer obtained by reacting a secondary amine with a glycidyl group of a copolymer composed of, as essential monomer components, (a) a polymerizable unsaturated vinylsilane monomer containing a polymerizable unsaturated double bond and a hydrolyzable alkoxysilane group, and a glycidyl group-containing unsaturated vinyl monomer, and optionally as additional monomer components, (c) a polymerizable unsaturated monomer containing a polymerizable unsaturated double bond and a hydroxyl group and/or (d) the other polymerizable unsaturated monomer.
Claim 6
Dependent Claim
27 words
The finely divided gelled polymer of claim 3 or 4 wherein the vinylsilane monomer (a) is selected from vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris- beta-methoxyethoxysilane, gamma-acryloxypropyltrimethoxy silane, gamma-methacryloxypropyltrimethoxysilane and gamma-methacryloxypropylmethyldimethoxysilane.
Claim 7
Dependent Claim
17 words
The finely divided gelled polymer of claim 3 or 4 wherein the vinylsilane monomer (a) is gamma-methacryloxypropyltrimethoxysilane.
Claim 8
Dependent Claim
47 words
The finely divided gelled polymer of claim 3 wherein the polymerizable unsaturated monomer (b) is a compound selected from dialkylaminoalkyl (meth)acrylates in which each of the alkyls has 1 to 6 carbon atoms and dialkylaminoalkyl(meth)acrylamides in which each of the alkyls has 1 to 6 carbon atoms.
Claim 9
Dependent Claim
25 words
The finely divided gelled polymer of claim 4 wherein the glycidyl group-containing unsaturated vinyl monomer is a compound selected from glycidyl acrylate and glycidyl methacrylate.
Claim 10
Dependent Claim
24 words
The finely divided gelled polymer of claim 3 or 4 wherein the polymerizable unsaturated monomer (c) is selected from 2-hydroxyethyl (meth)acrylate and hydroxypropyl (meth)acrylate.
Claim 11
Dependent Claim
62 words
The finely divided gelled polymer of claim 3 wherein the acrylic copolymer is an acrylic copolymer composed of 1 to 30% by weight of the vinylsilane monomer (a), 5 to 30% by weight of the polymerizable unsaturated monomer (b), 0 to 30% by weight of the polymerizable unsaturated monomer (c) and 10 to 94% by weight of the polymerizable unsaturated monomer (d).
Claim 12
Dependent Claim
41 words
The finely divided gelled polymer of claim 1 wherein the acrylic copolymer has an amine value of about 10 to about 100, a hydroxyl value of about 200 or less and a number-average molecular weight of about 5,000 to about 100,000.
Claim 13
Dependent Claim
36 words
The finely divided gelled polymer of claim 3 wherein the acrylic copolymer is a copolymer further comprising, as additional monomer components, (c) a polymerizable unsaturated monomer containing a polymerizable unsaturated double bond and a hydroxyl group.
Claim 14
Dependent Claim
35 words
The finely divided gelled polymer of claim 3 or 19 wherein the acrylic copolymer is a copolymer further comprising, as additional monomer components, (d) a polymerizable unsaturated monomer other than monomers (a), (b) and (c).
References Cited (Backward Citations)
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