# US 10,767,078 B2 · Water-based paint composition for vehicle

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- Number: US 10,767,078 B2
- Document ID: US10767078B2
- Status: Granted
- Kind: B2
- Application number: 15/579,121
- Filed: 2016-06-02
- Published: 2018-06-14
- Granted: 2020-09-08
- Earliest claimed: 2015-06-03
- Assignees: Kcc Corporation
- Applicants: KCC Corporation
- Inventors: Su Young Cho; Yong Joo Kim; Seung Min Hong; So Jin Kang; Yong Ho Choi; Bon Yi Lee
- Web page: https://patentgrep.com/patent/US10767078B2

## CPC

- C09D 175/14: Polyurethanes having carbon-to-carbon unsaturated bonds
- C08G 18/672: {Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen}
- C08G 63/12: derived from polycarboxylic acids and polyhydroxy compounds
- C08G 63/78: Preparation processes
- 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 167/00: Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain (based on polyester-amides C09D177/12; based on polyester-imides C09D179/08); Coating compositions based on derivatives of such polymers
- C09D 175/06: from polyesters
- C09D 201/00: Coating compositions based on unspecified macromolecular compounds
- C08L 2201/52: Aqueous emulsion or latex, e.g. containing polymers of a glass transition temperature (Tg) below 20°C
- C08L 2207/53: Core-shell polymer
- Y02P 20/124
- C08K 5/0025: {Crosslinking or vulcanising agents; including accelerators}
- C08K 5/0041: {Optical brightening agents, organic pigments}
- C08L 67/08: Polyesters modified with higher fatty oils or their acids, or with resins or resin acids
- C08L 75/04: Polyurethanes
- 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)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

Embodiments relate to a water soluble paint composition for a vehicle. The water soluble paint composition includes a core-shell microgel resin, a dimer-modified polyester resin, a (meth)acryl-modified polyurethane resin, a curing agent, a pigment, and water, wherein the dimer-modified polyester resin is included in an amount of 1 to 10 wt % with respect to 100 wt % of the water-soluble paint composition. When the water soluble paint composition according to various embodiments is used to paint a vehicle, air handling equipment and an oven are not needed, so that energy can be saved in the painting process, CO2 production can be reduced, costs can be saved for painting equipment and maintenance, and space for a painting line can be saved, and a paint layer can be formed having excellent smoothing, waterproofing, chipping resistance, and outer appearance.

## Claims

### Claim 1

A water-based paint composition for a vehicle, the water-based paint composition comprising:
a core-shell microgel resin, a dimer-modified polyester resin, a (meth)acryl-modified polyurethane resin, a curing agent, a pigment, and water,
wherein the dimer-modified polyester resin is comprised in an amount of 1 to 10 wt % with respect to 100 wt % of the water-based paint composition.

### Claim 2 (depends on 1)

The water-based paint composition for the vehicle according to claim 1, wherein the core-shell microgel resin has a solid content of 30 to 70% with respect to a total weight of the core-shell microgel resin, an acid value of 5 to 60 mgKOH/g, a glass transition temperature of −15 to 20° C., and a particle diameter of 50 to 200 nm.

### Claim 3 (depends on 1)

The water-based paint composition for the vehicle according to claim 1, wherein the dimer-modified polyester resin is a polyester resin produced by condensation polymerization of a dicarboxylic acid component comprising a dimer acid, with a polyhydric alcohol component comprising a diol obtained by reducing a dimer acid.

### Claim 4 (depends on 1)

The water-based paint composition for the vehicle according to claim 1, wherein the dimer-modified polyester resin has a solid content of 60 to 90% with respect to a total weight of the dimer-modified polyester resin, an acid value of 5 to 40 mgKOH/g, a number average molecular weight of 1,000 to 4,000, and a glass transition temperature of −40 to −20° C.

### Claim 5 (depends on 1)

The water-based paint composition for the vehicle according to claim 1, wherein the (meth)acryl-modified polyurethane resin is a modified polyurethane resin produced by reacting a urethane prepolymer, which is a reaction product of a polyol and an isocyanate, with one or more (meth)acrylates.

### Claim 6 (depends on 1)

The water-based paint composition for the vehicle according to claim 1, wherein the (meth)acryl-modified polyurethane resin has a solid content of 30 to 60% with respect to a total weight of the (meth)acryl-modified polyurethane resin, a number average molecular weight of 8,000 to 100,000, an acid value of 15 to 35 mgKOH/g, and a particle diameter of 50 to 200 nm.