# US 10,865,313 B2 · Resin emulsion for damping paint, damping paint, and method for producing resin emulsion for damping paint

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- Number: US 10,865,313 B2
- Document ID: US10865313B2
- Status: Granted
- Kind: B2
- Application number: 16/488,660
- Filed: 2019-01-15
- Published: 2020-02-13
- Granted: 2020-12-15
- Earliest claimed: 2018-01-17
- Assignees: Saiden Chemical Industry Co., Ltd.
- Applicants: Saiden Chemical Industry Co., Ltd.
- Inventors: Koji Abe; Kenichiro Ishimoto
- Web page: https://patentgrep.com/patent/US10865313B2

## CPC

- C09D 5/02: Emulsion paints {including aerosols}
- C08F 2/22: Emulsion polymerisation
- C08F 2/44: Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
- C08F 265/06: Polymerisation of acrylate or methacrylate esters on to polymers thereof
- C08K 3/013: Fillers, pigments or reinforcing additives
- C08K 7/22: Expanded, porous or hollow particles
- C09D 5/022: {Emulsions, e.g. oil in water}
- C09D 133/04: Homopolymers or copolymers of esters {(C09D143/04 takes precedence)}
- C09D 133/06: of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D 133/12: Homopolymers or copolymers of methyl methacrylate
- C09D 151/003: {grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds (C09D151/04, C09D151/06 take precedence)}
- C09D 201/08: Carboxyl groups
- C09K 3/00: Materials not provided for elsewhere
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

Provided is a resin emulsion for a damping paint, the resin emulsion being capable of contributing to formation of a coating film to which swelling and peeling are unlikely to occur and having favorable mechanical stability. The resin emulsion for a damping paint contains a (meth)acrylic resin particle including a particle obtained by polymerizing a monomer component containing 50% by mass or more of a (meth)acrylic acid ester and an adsorbed protective layer obtained by allowing a polycarboxylic acid-based polymer compound having a structural unit derived from a carboxylic acid, or a salt or anhydride thereof to be adsorbed onto the surface of the particle. The (meth)acrylic resin particle has a ratio of an average particle diameter DA by means of a laser diffraction/scattering method to an average particle diameter DB by means of a dynamic light scattering method, DA/DB, of less than 1.

## Claims

### Claim 1

A resin emulsion for a damping paint, comprising a (meth)acrylic resin particle including:
a particle obtained by polymerizing a monomer component containing 50% by mass or more of a (meth)acrylic acid ester; and
an adsorbed protective layer obtained by allowing a polycarboxylic acid-based polymer compound having a structural unit derived from a carboxylic acid, or a salt or anhydride thereof to be adsorbed onto a surface of the particle, wherein
the (meth)acrylic resin particle has a ratio of an average particle diameter DA by means of a laser diffraction/scattering method to an average particle diameter DB by means of a dynamic light scattering method, DA/DB, of less than 1,
wherein the (meth)acrylic resin particle is a resin particle obtained by polymerizing the monomer component in the presence of 0.1-20 parts by mass of the polycarboxylic acid-based polymer compound based on 100 parts by mass of the total amount of the monomer component.

### Claim 2 (depends on 1)

The resin emulsion for a damping paint according to claim 1, wherein the polycarboxylic acid-based polymer compound contains at least one selected from the group consisting of poly(meth)acrylic acid, polymaleic acid, polyitaconic acid, acrylic acid-methacrylic acid copolymers, (meth)acrylic acid-maleic acid copolymers, olefin-maleic acid copolymers, (meth)acrylic acid-sulfonic acid copolymers, maleic anhydride-styrene copolymers, maleic anhydride-ethylene copolymers, maleic anhydride-vinyl acetate copolymers, maleic anhydride-(meth)acrylic acid ester copolymers, and salts thereof, and polycarboxylic acid polymer surfactants.

### Claim 3 (depends on 1)

The resin emulsion for a damping paint according to claim 1, wherein the polycarboxylic acid-based polymer compound contains at least one selected from the group consisting of polycarboxylic acid polymer surfactants, polyacrylic acid, and polyacrylic acid salts.

### Claim 4 (depends on 1)

The resin emulsion for a damping paint according to claim 1, wherein the (meth)acrylic resin particle is polymerized using a pre-emulsion containing a liquid medium, the monomer component, and the polycarboxylic acid-based polymer compound.

### Claim 5 (depends on 1)

The resin emulsion for a damping paint according to claim 1, wherein the (meth)acrylic resin particle is polymerized adding a pre-emulsion containing the liquid medium and the monomer component to a mixed liquid containing a liquid medium and the polycarboxylic acid-based polymer compound.

### Claim 6 (depends on 1)

The resin emulsion for a damping paint according to claim 1, wherein the polycarboxylic acid-based polymer compound has a weight average molecular weight of 1,000 to 5,000,000.

### Claim 7 (depends on 1)

A damping paint comprising: the resin emulsion for a damping paint according to claim 1; and a filler.

### Claim 8 (depends on 1)

A method for producing the resin emulsion for a damping paint according to claim 1, the method comprising
polymerizing the monomer component containing 50% by mass or more of a (meth)acrylic acid ester in the presence of the polycarboxylic acid-based polymer compound having a structural unit derived from a carboxylic acid, or a salt or anhydride thereof to thereby form a particle obtained by polymerizing the monomer component and form an adsorbed protective layer obtained by allowing the polycarboxylic acid-based polymer compound to be adsorbed onto a surface of the particle, thereby synthesizing the (meth)acrylic resin particle having a ratio of an average particle diameter DA by means of a laser diffraction/scattering method to an average particle diameter DB by means of a dynamic light scattering method, DA/DB, of less than 1.