Automotive hydraulic transfer paint composition and coated products and parts for automobiles including same

1 . A paint composition, based on a total composition, comprising:

45% to 60% by weight of a resin mixture including an acrylic polyol resin and a polyester polyol resin;

30% to 40% by weight of a solvent;

3% to 5% by weight of an anti-sedimentation agent;

0.1% to 0.5% by weight of a curing accelerator;

0.2% to 1.5% by weight of a UV stabilizer;

0.3% to 1% by weight of a polysiloxane-based surface conditioning agent;

1% to 3% by weight of a wax; 1% to 6% by weight of a urethane bead; and

0.5% to 2% by weight of a matting agent comprising silica.

2 . The paint composition of claim 1 , wherein the matting agent has a D50 particle size in a range of 8 to 12 μm.

3 . The paint composition of claim 1 , wherein the matting agent has a pH value in a range of 6 to 7 and a specific surface area in a range of 200 to 300 m 2 /g.

4 . The paint composition of claim 1 , wherein the matting agent is fumed silica.

5 . The paint composition of claim 1 , wherein

the acrylic polyol resin comprises a first acrylic polyol resin and a second acrylic polyol resin,

the first acrylic polyol resin has a weight-average molecular weight (Mw) in a range of 500 to 1500 g/mol, a glass transition temperature (Tg) in a range of 50° C. to 60° C., an acid value in a range of 3 to 5 mgKOH/g, and a hydroxyl value in a range of 58 to 60 mgKOH/g, and

the second acrylic polyol resin has a weight-average molecular weight (Mw) in a range of 1800 to 3000 g/mol, a glass transition temperature (Tg) in a range of 40° C. to 50° C., an acid value in a range of 1 to 2 mgKOH/g, and a hydroxyl value in a range of 25 to 26 mgKOH/g.

6 . The paint composition of claim 1 , wherein the polyester polyol resin has a weight-average molecular weight (Mw) in a range of 300 to 800 g/mol, an acid value in a range of 1 to 3 mgKOH/g, and a hydroxyl value in a range of 112 to 114 mgKOH/g.

7 . The paint composition of claim 1 , wherein the solvent comprises an ester-based solvent and a ketone-based solvent,

wherein the ester-based solvent comprises normal butyl acetate, isobutyl acetate, ethyl acetate, or a combination thereof, and

wherein the ketone-based solvent comprises methyl isobutyl ketone, methyl ethyl ketone, cyclohexanone, or a combination thereof.

8 . The paint composition of claim 1 , wherein the anti-sedimentation agent comprises amide wax, polyethylene wax, or a combination thereof.

9 . The paint composition of claim 1 , wherein the curing accelerator comprises a dibutyltin dilaurate.

10 . The paint composition of claim 1 , wherein the UV stabilizer comprises a hydroxyphenyl-benzotriazole-based stabilizer and a decanedioic acid-based stabilizer.

11 . The paint composition of claim 1 , wherein the wax comprises polytetrafluoroethylene (PTFE) wax, polyethylene wax, or a combination thereof.

12 . The paint composition of claim 1 , wherein the wax has a D50 particle size in a range of 6 to 10 μm.

13 . The paint composition of claim 1 , wherein the urethane bead has a particle size in a range of 20 to 40 μm.

14 . The paint composition of claim 1 , wherein the urethane bead is a non-crosslinked polymer.

15 . A coated product including a paint composition, the paint composition, based on a total composition, comprising:

45% to 60% by weight of a resin mixture including an acrylic polyol resin and a polyester polyol resin;

30% to 40% by weight of a solvent;

3% to 5% by weight of an anti-sedimentation agent;

0.1% to 0.5% by weight of a curing accelerator;

0.2% to 1.5% by weight of a UV stabilizer;

0.3% to 1% by weight of a polysiloxane-based surface conditioning agent;

1% to 3% by weight of a wax;

1% to 6% by weight of a urethane bead; and

0.5% to 2% by weight of a matting agent comprising silica.

16 . An automotive part comprising:

a base layer;

a base color layer positioned on the base layer;

a hydraulic transfer layer positioned on the base color layer; and

a skin layer positioned on the hydraulic transfer layer,

wherein the skin layer comprises a paint composition, based on a total composition, having

45% to 60% by weight of a resin mixture including an acrylic polyol resin and a polyester polyol resin,

30% to 40% by weight of a solvent,

3% to 5% by weight of an anti-sedimentation agent,

0.1% to 0.5% by weight of a curing accelerator,

0.2% to 1.5% by weight of a UV stabilizer,

0.3% to 1% by weight of a polysiloxane-based surface conditioning agent,

1% to 3% by weight of a wax,

1% to 6% by weight of a urethane bead, and

0.5% to 2% by weight of a matting agent comprising silica.