Patent ID: 8222365

Claim:
A polyamideimide resin, comprising structures represented by the following formulae (2) and (4a) or structures represented by the following formulae (2) and (6): wherein each of R 1 and R 2 is an alkyl group having 1 to 3 carbon(s); each of R 5 and R 6 is hydrogen, or an alkyl group having 1 to 3 carbon(s); R 7 is hydrogen, or an alkyl group having 1 to 3 carbon(s); n is an integer of 1 to 3; each of R 10 and R 11 is hydrogen, or an alkyl group having 1 to 3 carbon(s); the ratio of (unit represented by the formula (2))/(unit represented by the formula (4a)) is within a range of 99.9/0.1 to 50/50; the ratio of (unit represented by the formula (2))/(unit represented by the formula (6)) is within a range of 99.9/0.1 to 50/50; and the polyamideimide resin has an inherent viscosity of from 0.8 dl/g to 2.5 dl/g.