Photosensitive resin composition, and polymer film made therefrom

A polymer film made by curing a photosensitive resin composition, the photosensitive resin composition comprising:

• 100 parts by weight of a modified polyimide polymer having a chemical structural formula of
• 10 parts to 40 parts by weight of photosensitive monomers;
• 10 parts to 25 parts by weight of a bisphenol-A epoxy resin having a chemical structural formula of
• 1 part to 10 parts by weight of a photo-initiator;
• and
• 1 part to 5 parts by weight of a coloring agent;
• wherein the modified polyimide polymer is made by a reaction of a polyimide polymer having a chemical structural formula of
• and glycidyl methacrylate, during the reaction, the carboxyl group bonded with R group of the polyimide polymer reacts with the epoxy group of glycidyl methacrylate;
• the polyimide polymer is made by a polymerization reaction of dianhydride monomers each having an A group, diamine monomers each having a R group, diamine monomers each having a R1 group, and diamine monomers each having a R2 group;
• the diamine monomer having R group is a diamine compound having R group bonded with the carboxyl group, the diamine monomer having R1 group is a soft long-chain diamine monomer, R2 group comprises at least one secondary amine group or tertiary amine group;
• a degree of polymerization x, a degree of polymerization y, and a degree of polymerization z each is a natural number greater than 1, the epoxy resin has an epoxy equivalent weight of about 180 g/Eq to about 2000 g/Eq, the dianhydride monomer having A group is selected from a group consisting of 4,4′-bis(phthalic anhydride)sulfide having a CAS number 25884-43-9, bis-(3-phthalyl anhydride) ether having a CAS number 1823-59-2, bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxylic acid dianhydride having a CAS number 1719-83-1, N,N′-(5,5′-(perfluoropro-pane-2,2-diyl) bis(2-hydroxy-5,1-phenylene))bis(1,3-dioxo-1,3-dihydroisobenzofuran-5-arboxamide) having a CAS number 223255-30-9, bicyclooctanetetracarboxylic dianhydride having a CAS number 2754-40-7, and any combination thereof;
• the diamine monomer having R group is selected from a group consisting of 5,5′-methylenebis(2-aminobenzoic acid), 3,5-diaminobenzoic acid, 1,3-bis(4-amino-2-carboxyphenoxy)benzene having a CAS number 1620566-43-9, 3,5-bis(4-Aminophenoxy)Benzoic acid, 5-amino-2-(4-aminophenoxy)benzoic acid having a CAS number 135209-70-0, N-bis(4-aminophenyl)-4-carboxylaniline having a CAS number 1071762-58-7, 3,5-diamino-4-methoxybenzoic acid having a CAS number 177960-30-4, 3,4-diaminobenzoic acid, and any combination thereof;
• the diamine monomer having R1 group is selected from a group consisting of (3-aminopropyl)-terminated dimethylsiloxane having a CAS number 97917-34-5, triethylenetetramine, tetraethylenepentamine, polyetheramine having a CAS number 400760-04-5, 796093-55-5, 9046-10-0, or 9046-10-0, and any combination thereof.