PROCESSES FOR PRODUCTION OF POWDERED FLUORORESINS BEARING CURABLE FUNCTIONAL GROUPS AND COATING COMPOSITIONS CONTAINING THE SAME
申请人:Asahi Glass Company, Limited
公开号:EP1460090A1
公开(公告)日:2004-09-22
It is to provide a production process by which gelation can be prevented, in a case where a solvent is removed from a curable fluororesin to obtain a chief material resin, and then coating additives such as a curing agent are mixed to produce a powder coating composition, or in a case where a curable fluororesin, a curing agent and various additives are dissolved or dispersed in a solvent to prepare a raw material solution, and the solvent is removed from the raw material solution to directly produce a powder coating material.
To a solution or dispersion of a curable fluorinated copolymer (A), a gelation inhibitor (B) is added, followed by mixing, or a gelation inhibitor (B), a curing agent (C) and as the case requires, various additives (D) are added, followed by mixing, and the solution or dispersion is supplied to a thin-film vacuum evaporator to remove the solvent.
其目的是提供一种可防止凝胶化的生产工艺,即从可固化氟树脂中去除溶剂以获得主材料树脂,然后混合固化剂等涂料添加剂以生产粉末涂料组合物,或者将可固化氟树脂、固化剂和各种添加剂溶解或分散在溶剂中以制备原料溶液,然后从原料溶液中去除溶剂以直接生产粉末涂料材料。
在可固化含氟共聚物(A)的溶液或分散液中加入凝胶化抑制剂(B),然后混合,或加入凝胶化抑制剂(B)、固化剂(C)和各种添加剂(D)(视情况需要),然后混合,并将溶液或分散液提供给薄膜真空蒸发器以去除溶剂。