Method for producing acrylic resin-coated silica particle dispersion

Patent metadata

Field	Value
Publication number	US-10865319-B2
Application number	US-201615762873-A
Country	US
Kind code	B2
Filing date	Sep 8, 2016
Priority date	Sep 24, 2015
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

A method for producing an acrylic resin-coated silica particle dispersion by (1), mixing and heating silica particles (A), an organic solvent (B) and a monomer having a polymerizable unsaturated group and a hydrolyzable silyl group (C) to obtain a polymerizable unsaturated group-containing silica particle dispersion (i), (2) adding a tertiary amine (D) with a molecular weight of 120 to 380 and having a terminal alkyl and/or aryl group, to the component (i) dispersion, to obtain a polymerizable unsaturated group-containing silica particle dispersion (ii), and (3) reacting the component (ii) dispersion with a polymerizable unsaturated monomer (E), in a solid mass ratio of (ii):(E)=20:80 to 90:10, to obtain an acrylic resin-coated silica particle dispersion.

First claim

The invention claimed is:

1. A method for producing an acrylic resin-coated silica particle dispersion, the method comprising:
(1) mixing and heating silica particles (A), an organic solvent (B) and a monomer having a polymerizable unsaturated group and a hydrolyzable silyl group (C) to obtain a polymerizable unsaturated group-containing silica particle dispersion (i),
(2) adding a tertiary amine (D) with a molecular weight of 120 to 380 and a having a terminal alkyl group, to the polymerizable unsaturated group-containing silica particle dispersion (i) obtained in (1), to obtain a polymerizable unsaturated group-containing silica particle dispersion (ii),
(3) reacting the polymerizable unsaturated group-containing silica particle dispersion (ii) obtained in (2) with a polymerizable unsaturated monomer (E), in a solid mass ratio of (ii):(E)=20:80 to 90:10, to obtain an acrylic resin-coated silica particle dispersion,
wherein at least one of the alkyl groups of the tertiary amine (D) is an alkyl group of 5 to 12 carbon atoms.

2. The method for producing an acrylic resin-coated silica particle dispersion according to claim 1 , wherein the silica particles (A) are colloidal silica having a mean primary particle size of 5 to 100 nm.

3. The method for producing an acrylic resin-coated silica particle dispersion according to claim 1 , wherein the organic solvent (B) is an alcohol and/or a glycol ether.

4. The method for producing an acrylic resin-coated silica particle dispersion according to claim 1 , wherein at least one of the alkyl groups of the tertiary amine (D) is a straight-chain alkyl group.

5. A method for producing a coating composition including a step of mixing an acrylic resin-coated silica particle dispersion obtained by the production method according to claim 1 , a hydroxyl group-containing resin and a curing agent.

6. The method for producing a coating composition according to claim 5 , wherein the hydroxyl group-containing resin is a hydroxyl group-containing acrylic resin.

7. A multilayer coating film-forming method whereby a multilayer coating film is formed by applying at least one colored base coating material and at least one clear coating material in that order on an article to be coated, wherein a coating composition according to claim 6 is applied as the uppermost clear coating material.

8. The method according to claim 1 , further comprising mixing the acrylic resin-coated silica particle dispersion with a hydroxyl group-containing resin and a curing agent.

Assignees

• Kansai Paint Co Ltd

Inventors

• Watanabe Kazuya
• Nagai Akinori

Classifications

• B05D7/5383

  No curing step for any layer · CPC title

• C09D133/00

  Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers · CPC title

• C09C3/10

  Treatment with macromolecular organic compounds {(C09C3/006 takes precedence)} · CPC title

• C09D7/62 Primary

  modified by treatment with other compounds · CPC title

• C09D201/06

  containing oxygen atoms {(C09D201/025 takes precedence)} · CPC title