A transparent powder paint and a method of forming a coated film toned by using the above powder paint
申请人:MITA INDUSTRIAL CO. LTD.
公开号:EP0856567A2
公开(公告)日:1998-08-05
The transparent powder paint of this invention is obtained by dispersing various coloring agents in the polyester resin. The polyester resin is obtained especially by polycondensing (i) a diol component of the following general formula (1):
wherin each of R1 and R2 represents a lower alkylene group, and each of x and y is 0 or an integer of at least 1, and x + y represents an integer of 1 to 7,
(ii) a dicarboxylic acid, and (iii) a polycarboxylic acid having at least three valences or a polyhydric alcohol having at least three valences, the polyester resin having a ratio of a hydroxyl value (OHV) to an acid value (AV), OHV/AV, of at least 1.2. The transparent powder paint can give a coated film having toned vivid colors.
本发明的透明粉末涂料是通过在聚酯树脂中分散各种着色剂而获得的。聚酯树脂尤其是通过以下通式(1)的二元醇成分缩聚而得:
其中 R1 和 R2 各代表一个低级亚烷基,x 和 y 各为 0 或至少为 1 的整数,x + y 代表 1 至 7 的整数、
(iii) 具有至少三个价的聚羧酸或具有至少三个价的多元醇,聚酯树脂的羟值 (OHV)与酸值(AV)之比(OHV/AV)至少为 1.2。透明粉末涂料可使涂膜具有鲜艳的色调。