Method of producing polyimide resin, method of producing polyimide coating, method of producing polyamic acid solution, polyimide coating, and polyamic acid solution
申请人:TOKYO OHKA KOGYO CO., LTD.
公开号:EP2910591A1
公开(公告)日:2015-08-26
Provided is a method of producing a polyimide resin or a polyimide coating, which is capable of producing a polyimide resin or a polyimide coating, each having excellent heat resistance and mechanical properties and having low hygroscopicity, while suppressing foaming. Provided is also a method of producing a polyamic acid solution, in which not only foaming at the time of polyimide resin production can be suppressed, but also a polyimide resin that is excellent in heat resistance and mechanical properties and low in hygroscopicity is given. Provided is further a polyimide coating and a polyamic acid solution obtained from these methods, respectively. A polyamic acid obtained from a reaction between a tetracarboxylic acid dianhydride component and a diamine component is heated in a mixed solvent composed of N,N,N',N'-tetramethylurea and at least one solvent selected from specified aprotic polar organic solvents and specified glycol ethers, to yield a polyimide resin.
本发明提供了一种聚酰亚胺树脂或聚酰亚胺涂层的生产方法,该方法能够生产出耐热性和机械性能优异且吸湿性低的聚酰亚胺树脂或聚酰亚胺涂层,同时还能抑制发泡。本发明还提供了一种聚酰胺酸溶液的生产方法,该方法不仅能抑制聚酰亚胺树脂生产时的发泡,还能生产出耐热性和机械性能优异、吸湿性低的聚酰亚胺树脂。此外,还提供了分别从这些方法中获得的聚酰亚胺涂层和聚酰胺酸溶液。在由 N,N,N',N'-四甲基脲和至少一种选自特定非烷基极性有机溶剂和特定乙二醇醚的溶剂组成的混合溶剂中加热由四羧酸二酐组分和二胺组分反应得到的聚酰胺,得到聚酰亚胺树脂。