申请人:Takasawa Ryoichi
公开号:US20130178597A1
公开(公告)日:2013-07-11
Disclosed is a novel co-polyimide precursor for producing a polyimide having high transparency. The co-polyimide precursor comprises a unit structure represented by general Formula (A1) and a unit structure represented by general Formula (A2):
wherein, in general Formula (A1), R
1
represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; and R
2
and R
3
each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkylsilyl group having 3 to 9 carbon atoms,
wherein, in general Formula (A2), R
4
represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; R
5
and R
6
each independently represent a hydrogen, an alkyl group having 1 to 6 carbon atoms, or an alkylsilyl group having 3 to 9 carbon atoms; and X represents a tetravalent group other than those represented by Formulae (A3):
本发明涉及一种新型共聚酰亚胺前体,用于制备具有高透明度的聚酰亚胺。该共聚酰亚胺前体包括由通式(A1)表示的单元结构和由通式(A2)表示的单元结构:其中,在通式(A1)中,R1表示氢原子或具有1至4个碳原子的烷基基团;R2和R3各自独立地表示氢原子、具有1至6个碳原子的烷基基团或具有3至9个碳原子的烷基硅基团,在通式(A2)中,R4表示氢原子或具有1至4个碳原子的烷基基团;R5和R6各自独立地表示氢原子、具有1至6个碳原子的烷基基团或具有3至9个碳原子的烷基硅基团;X表示除通式(A3)所表示的四价基团以外的四价基团。