Coating composition for forming scratch-resistant layer having high strength for automobile exterior and method for coating automobile exterior using the same
AssigneeNoroo Bee Chemical Co., Ltd.
InventorsJae Beom Ahn, Young Hoon Choi, Dae Geun Oh, Sung Do Kim, Si Hyun Jeong
Life of this patent
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Abstract
A coating composition may include 5 wt % to 20 wt % of a caprolactone-modified hyperbranched polyester polyol, the caprolactone-modified hyperbranched polyester polyol obtained from polyhydric alcohol including caprolactone triol, 30 wt % to 50 wt % of a first acrylic resin, the first acrylic resin having a hydroxyl group, 15 wt % to 25 wt % of a second acrylic resin, the second acrylic resin having a hydroxyl group and having a glass transition temperature higher than that of the first acrylic resin, and an extra solvent.
Claims12
A coating composition for forming a scratch-resistant layer having a high strength for automobile exterior, comprising:
- 5 wt % to 20 wt % of a caprolactone-modified hyperbranched polyester polyol, the caprolactone-modified hyperbranched polyester polyol obtained from polyhydric alcohol including caprolactone triol;
- 30 wt % to 50 wt % of a first acrylic resin, the first acrylic resin having a hydroxyl group;
- 15 wt % to 25 wt % of a second acrylic resin, the second acrylic resin having a hydroxyl group and having a glass transition temperature higher than that of the first acrylic resin;
- and
- 20 wt % to 40 wt % of a solvent,
- wherein the first acrylic resin has a solid content of 60% to 70%, a weight average molecular weight of 5,000 to 12,000, and a glass transition temperature of 10° C. to 20° C.
Dependencies are inferred from the claim text.