| abstract |
The invention provides a colorless transparent polyimide resin, which is formed by copolymerizing at least two dianhydride monomers and at least two diamine monomers. At least one of the dianhydride monomer and the diamine monomer has the structure of Formula 1, and the content of the monomer having the structure of Formula 1 accounts for 10-50% of the total moles of dianhydride or diamine.n n n n n n n n In Formula 1, X system is SO 2 , C (CH 3 ) 2 or C (CF 3 ) 2 , and Y system is an oxygen atom. |