Patent FR329692A successfully refreshed from Google Patents.
EP0282000A2
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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: 1988-03-08
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Granted: —
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Expires: 2008-03-08
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 c/o Gijutsuhonbu Shibata
- 👤 Akira C/O Gijutsuhonbu Tominaga
- 👤 Tadayoshi C/O Gijutsuhonbu Hiraki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 01:41
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4488; C09D5/4492
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
31 words
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.
Claim 2
Dependent Claim
31 words
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.
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
82 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, 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 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, vinyltrisbeta-methoxyethoxysilano, 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
70 words
A process for producing a cationically electrodepositable finely divided gelled polymer which comprises neutralizing an acrylic copolymer containing a hydrolyzable alkoxysilane group and a cationic group with an acid. dispersing the neutralized acrylic copolymer in water and then heating the dispersion at 50'C or higher. or neutralizing said acrylic copolymer and dispersing the neutralized acrylic copolymer in water in the presence of a catalyst for condensation of the silanol group.
Claim 14
Dependent Claim
70 words
A process for producing a cationically electrodepositable finely divided gelled polymer which comprises neutralizing an acrylic copolymer containing a hydrolyzable alkoxysilane group and a cationic group with an acid. dispersing the neutralized acrylic copolymer in water and then heating the dispersion at 50'C or higher. or neutralizing said acrylic copolymer and dispersing the neutralized acrylic copolymer in water in the presence of a catalyst for condensation of the silanol group.
Claim 15
Dependent Claim
24 words
The process of claim 12 wherein the catalyst for condensation of the silanol group is tin octylate. zinc octylate, zirconium octylate and dibutyltin laurate.
Claim 16
Dependent Claim
53 words
A cationically electrodepositable coating composition wherein a 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 is contained in an amount of 1 to 35% by weight based on the total resin solids content.
Claim 17
Dependent Claim
53 words
A cationically electrodepositable coating composition wherein a 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 is contained in an amount of 1 to 35% by weight based on the total resin solids content.
Claim 18
Dependent Claim
73 words
The coating composition of claim 14 wherein the finely divided gelled polymer is one produced by neutralizing an acrylic copolymer containing a hydrolyzable alkoxysilane group and a cationic group with an acid. dispersing the neutralized acrylic copolymer in water and then heating the dispersion at 50°C or higher. or neutralizing said acrylic coplymer and dispersing the neutralized acrylic copolymer in water in the presence of a catalyst for condensation of the silanol group.
Claim 19
Dependent Claim
25 words
An electrodeposition coating method which comprises subjecting a surface of a substrate to cationic electrodeposition coating using the cationically electrodepositable coating composition of claim 14.
Claim 20
Dependent Claim
17 words
Use of the finely divided gelled polymer of claim 1 to produce a cationically electrodepositable coating composition.
Claim 21
Dependent Claim
12 words
An article coated with the cationically electrodepositable coating composition of claim 14.
References Cited (Backward Citations)
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