发明名称 |
Waterborne coating composition and a paint system thereof having improved chip resistance |
摘要 |
An acrylic-free, waterborne coating composition is disclosed. The waterborne coating composition produces a waterborne paint film having improved chip resistance on a substrate. The waterborne coating composition comprises an aqueous polyurethane dispersion substantially free from co-solvents. The polyurethane dispersion has a glass transition temperature from 0° C. or less and at least one carboxyl group. The waterborne coating composition also includes a melamine reactive with the carboxyl group. The aqueous polyurethane dispersion and the water-soluble cross-linker form a binder component of the waterborne coating composition. The binder component includes from 60 to 90% by weight of the aqueous polyurethane dispersion based on 100% by weight of the binder component and from 10 to 40% by weight of the water-soluble cross-linker based on 100% by weight of the binder component. The waterborne coating composition is applied having a film build of 0.5 to 5.0 mils and produces a paint film loss of from 0.05 to 0.8% according to a Gravel Chip Test.
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申请公布号 |
US6555231(B2) |
申请公布日期 |
2003.04.29 |
申请号 |
US20010898320 |
申请日期 |
2001.07.03 |
申请人 |
BASF CORPORATION |
发明人 |
DOTY ROBERT;KANDOW TIMOTHY P. |
分类号 |
C09D175/04;(IPC1-7):B32B27/40;C08L75/04 |
主分类号 |
C09D175/04 |
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