发明名称 |
SOLVENT-FREE FILM-FORMING COMPOSITIONS FOR CLEAR COATS |
摘要 |
Film-forming compositions which are substantially free of organic solvent and capable of forming a generally continuous film at ambient temperature are provided. The film-forming composition includes at least one thermosettable aqueous dispersion of polymeric microparticles having functionality adapted to react with a crosslinking agent. The polymeric microparticles are prepared by mixing under high shear conditions (1) at least one hydrophobic polymer having reactive functional groups; and (2) at least one hydrophobic crosslinking agent containing functional groups which are reactive with the functional groups of the polymer. Further provided is a multi-component composite coating composition which includes a pigmented base coat and a transparent topcoat of the substantially organic solvent-free film-forming composition described above. Substrates coated with the same are also provided. Additionally, a method for preparing the aqueous dispersion of polymeric microparticles is provided. The substantially organic solvent-free film-forming compositions of the invention are storage stable at room temperature and provide coatings with excellent appearance and performance properties such as adhesion and scratch resistance. The film-forming compositions are suitable for wet-on-wet application over a base coat with little or no mud-cracking. |
申请公布号 |
WO0134714(A1) |
申请公布日期 |
2001.05.17 |
申请号 |
WO2000US29388 |
申请日期 |
2000.10.25 |
申请人 |
PPG INDUSTRIES OHIO, INC. |
发明人 |
DAS, SURYYA K.;HOGGE, MATTHEW F.;KILIC, SONER;NAKAJIMA, MASAYUKI |
分类号 |
C08J3/03;C08J3/24;C09D201/02 |
主分类号 |
C08J3/03 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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