# US 11,299,575 B2 · Water-based resin composition, water-based paint, and article

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- Number: US 11,299,575 B2
- Document ID: US11299575B2
- Status: Granted
- Kind: B2
- Application number: 16/616,704
- Filed: 2018-05-15
- Published: 2021-06-03
- Granted: 2022-04-12
- Earliest claimed: 2017-05-30
- Assignees: DIC Corporation
- Applicants: DIC Corporation
- Inventors: Daisuke Nakazawa; Norio Kosaka; Hideaki Kawahara
- Web page: https://patentgrep.com/patent/US11299575B2

## CPC

- C08F 279/02: on to polymers of conjugated dienes
- C09D 151/003: {grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds (C09D151/04, C09D151/06 take precedence)}
- C08F 8/04: Reduction, e.g. hydrogenation
- C08F 8/44: Preparation of metal salts or ammonium salts
- C08F 136/06: Butadiene
- C08F 220/06: Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
- C08F 220/14: Methyl esters {, e.g. methyl (meth)acrylate}
- C08F 220/1802: {C2-(meth)acrylate, e.g. ethyl (meth)acrylate}
- C08F 220/1804: {C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate}
- C08F 220/1806: {C6-(meth)acrylate, e.g. (cyclo)hexyl (meth)acrylate or phenyl (meth)acrylate}
- C08F 220/1808: {C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate}
- C08F 220/1811: {C10or C11-(Meth)acrylate, e.g. isodecyl (meth)acrylate, isobornyl (meth)acrylate or 2-naphthyl (meth)acrylate}
- C08F 220/1812: {C12-(meth)acrylate, e.g. lauryl (meth)acrylate}
- C08F 220/20: of polyhydric alcohols or phenols {, e.g. 2-hydroxyethyl (meth)acrylate or glycerol mono-(meth)acrylate}
- C08K 5/17: Amines; Quaternary ammonium compounds
- C08L 51/003: {grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds (C08L51/04, C08L51/06 take precedence)}
- C09D 7/63: organic
- C09D 109/00: Coating compositions based on homopolymers or copolymers of conjugated diene hydrocarbons
- C09D 151/04: grafted on to rubbers
- C08F 2810/20: leading to a crosslinking, either explicitly or inherently
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- 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)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

There is provided a water-based resin composition that contains a polymer (A) containing, as essential raw materials, a hydrogenated polybutadiene (a1) with an iodine value in the range of 5 to 25, a monomer (a2) with an acid group, and a monomer (a3) with a hydroxy group, a basic compound (B), and an aqueous medium (C), wherein the hydrogenated polybutadiene (a1) constitutes 4% to 38% by mass of the raw materials of the polymer (A), and the polymer (A) has an acid value in the range of 10 to 65 mgKOH/g. A water-based resin composition of the present invention has high storage stability and forms a coating film with good physical properties, such as high adhesiveness to various substrates and high blocking resistance, and is therefore suitably used in a water-based paint.

## Claims

### Claim 1

A water-based resin composition comprising: a polymer (A), which is a reaction product of a hydrogenated polybutadiene (a1) with an iodine value in the range of 5 to 25, a monomer (a2) with an acid group, and a monomer (a3) with a hydroxy group as essential raw materials; a basic compound (B); and an aqueous medium (C), wherein the hydrogenated polybutadiene (a1) constitutes 4% to 38% by mass of the raw materials of the polymer (A), the polymer (A) has an acid value in the range of 10 to 65 mgKOH/g, and the aqueous medium (C) contains a glycol ether solvent miscible with water.

### Claim 2 (depends on 1)

The water-based resin composition according to claim 1, wherein the hydrogenated polybutadiene (a1) has a number-average molecular weight in the range of 1,000 to 5,000.

### Claim 3 (depends on 1)

The water-based resin composition according to claim 1, wherein the polymer (A) has a hydroxyl value in the range of 5 to 50 mgKOH/g.

### Claim 4 (depends on 1)

A water-based paint comprising the water-based resin composition according to claim 1.

### Claim 5 (depends on 4)

An article comprising a coating film of the water-based paint according to claim 4.