发明授权
- 专利标题: Process for the production of a two-coat finish, and powder coatings suitable for this process
- 专利标题(中): 双层涂层生产工艺,适用于该工艺的粉末涂料
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申请号: US362528申请日: 1995-01-26
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公开(公告)号: US5601878A公开(公告)日: 1997-02-11
- 发明人: Wolfgang Kranig , Klaus Cibura , Joachim Woltering , Christopher Hilger , Josef Rademacher
- 申请人: Wolfgang Kranig , Klaus Cibura , Joachim Woltering , Christopher Hilger , Josef Rademacher
- 申请人地址: DEX Muenster-Hiltrup
- 专利权人: BASF Lacke + Farben. AG
- 当前专利权人: BASF Lacke + Farben. AG
- 当前专利权人地址: DEX Muenster-Hiltrup
- 优先权: DEX4222194.3 19920707
- 主分类号: B05D1/36
- IPC分类号: B05D1/36 ; B05D7/00 ; B05D7/24 ; C08L67/02 ; C09D5/46 ; C09D133/04 ; C09D133/06 ; C09D133/14 ; C09D163/00 ; C08L73/02
摘要:
The invention relates to a process for the production of two-coat finishes, in which a pigmented basecoat is first applied, the resulting basecoat film is coated with a powder clearcoat, and basecoat and clearcoat are subsequently baked together. In accordance with the invention, the powder clearcoat employed is a powder coating which contains an epoxide group-containing polyacrylate resin as binder and a mixture of (A) a polyanhydride and (B) a carboxyl group-containing polyester resin as crosslinking agent. The polyester resin can be prepared by reacting a diol (b1), a compound (b2) which contains per molecule at least three functional groups selected from hydroxyl, primary amino, secondary amino, carboxyl and acid anhydride groups, and (b3) a dicarboxylic acid in a molar ratio of (b1): (b2): (b3)=0.0 to 3.0: 1.0: 1.5 to 9.0 to give a polyester resin having an acid value of 40 to 300.
公开/授权文献
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