Polyimide precursor, polyimide, polyimide film, and method for manufacturing triazine compound used for manufacturing same
View Patent ↗A polyimide precursor for obtaining a polyimide film having excellent adhesiveness to metals and improved transmittance in the UV-visible range, a polyimide in which the polyimide precursor is used, a polyimide film in which the polyimide is used, and a method for manufacturing a triazine compound used for manufacturing the polyimide precursor, polyimide film and polyimide.
1. A polyimide precursor comprising a structural unit represented by general formula (I):
in which A is a tetravalent aromatic group and B is a divalent aromatic group,
wherein B in general formula (I) comprises a triazine moiety represented by following formula (B1):
in which R 1 denotes hydrogen or alkyl or aryl having 1 to 12 carbon atoms, and R 2 denotes hydrogen or alkyl or aryl having 1 to 12 carbon atoms, and
A in general formula (I) comprises a tetravalent residue obtainable by removing two carboxylic anhydride groups from 2,2-bis(3,4-dicarboxyphenyl)-1,1,1,3,3,3-hexafluoropropane dianhydride.
2. A polyimide precursor comprising a structural unit represented by general formula (I):
in which A is a tetravalent aliphatic group and B is a divalent aromatic group,
wherein B in general formula (I) comprises a triazine moiety represented by following formula (B1):
in which R 1 denotes hydrogen or alkyl or aryl having 1 to 12 carbon atoms, and R 2 denotes hydrogen or alkyl or aryl having 1 to 12 carbon atoms.
3. A polyimide precursor according to claim 2 , wherein A in general formula (I) comprises a tetravalent residue obtainable by removing two carboxylic anhydride groups from at least one of cyclohexanetetracarboxylic dianhydride and 1,2,3,4-cyclobutanetetracarboxylic dianhydride.
4. A polyimide precursor according to claim 1 , wherein R 1 denotes hydrogen and R 2 denotes phenyl in general formula (B1).
5. A polyimide precursor according to claim 1 , wherein B in general formula (I) comprises the triazine moiety represented by general formula (B1) in an amount of 10 to 100 mol %.
6. A polyimide obtainable from the polyimide precursor according to claim 1 , comprising a structural unit represented by general formula (II):
in which A and B are groups as defined in claim 1 .
7. A polyimide film comprising the polyimide according to claim 6 .
8. A metal laminate comprising the polyimide film according to claim 7 and metal layer laminated on the polyimide film directly or via an adhesive.
9. A method for producing 2,4-bis(3-aminoanilino)-6-substituted amino-1,3,5-triazine represented by general formula (B2), comprising:
reacting 6-substituted amino-1,3,5-triazine-2,4-dihalide represented by general formula (B3) with 3-nitroaniline to form 2,4-bis-(3-nitroanilino)-6-substituted amino-1,3,5-triazine represented by general formula (B4); and
reducing the obtained 2,4-bis-(3-nitroanilino)-6-substituted amino-1,3,5-triazine;
in which R 1 denotes hydrogen or alkyl or aryl having 1 to 12 carbon atoms, R 2 denotes hydrogen or alkyl or aryl having 1 to 12 carbon atoms, and X denotes halogen atom.
10. A polyimide precursor according to claim 2 , wherein R 1 denotes hydrogen and R 2 denotes phenyl in general formula (B1).
11. A polyimide precursor according to claim 2 , wherein B in general formula (I) comprises the triazine moiety represented by general formula (B1) in an amount of 10 to 100 mol %.
12. A polyimide obtainable from the polyimide precursor according to claim 2 , comprising a structural unit represented by general formula (II):
in which A and B are groups as defined in claim 2 .
13. A polyimide film comprising the polyimide according to claim 12 .
14. A metal laminate comprising the polyimide film according to claim 13 and metal layer laminated on the polyimide film directly or via an adhesive.