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公开(公告)号：US09943878B2
公开(公告)日：2018-04-17
申请号：US15106351
申请日：2014-12-12
发明人： Shuji Yomo , Kazuyuki Tachi , Hisao Hayashi
CPC分类号： B05D3/0254 , B05D1/36 , B05D7/532 , B05D7/542 , B05D2502/00 , B05D2502/005 , B05D2508/00
摘要： A coating method for forming a laminated coating film including a lower layer formed on a base material and an upper layer formed on the lower layer including: preparing a thermosetting coating material as a lower layer-coating material and preparing a thermosetting coating material as an upper layer-coating material; forming an uncured laminated coating film by applying the lower layer-coating material and the upper layer-coating material on the base material using a wet-on-wet technique; and simultaneously curing the lower layer-coating material and the upper layer-coating material by baking the uncured laminated coating film. In the preparation step, the lower layer-coating material and the upper layer-coating material are selected so that an absolute value of a difference in shrinkage ratio between the lower layer and the upper layer coating materials is 2.0% or smaller at a late stage of the baking step.
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公开(公告)号：US09931669B2
公开(公告)日：2018-04-03
申请号：US15106373
申请日：2014-12-12
发明人： Shuji Yomo , Kazuyuki Tachi , Hisao Hayashi
CPC分类号： B05D7/5723 , B05D1/04 , B05D3/0254 , B05D7/572 , B05D7/582 , B05D2502/005 , B05D2508/00
摘要： A coating method for forming a laminated coating film including: preparing a thermosetting coating material as a lower layer-coating material, an intermediate layer-coating material, and as an upper layer-coating material; forming an uncured laminated coating film by applying the lower layer-coating, the intermediate layer-coating, and the upper layer-coating materials on the base material using a wet-on-wet technique; and simultaneously curing the lower layer-coating, the intermediate layer-coating, and upper layer-coating materials by baking the uncured laminated coating film. In the preparation step, the lower layer-coating, the intermediate layer-coating, and the upper layer-coating materials are selected so a sum of an absolute value of a difference in shrinkage ratio between the lower layer-coating and the intermediate layer-coating materials and an absolute value of a difference in shrinkage ratio between the intermediate layer-coating and the upper layer-coating materials at the late stage of the baking is 3.0% or smaller.
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