| abstract |
(57) [Summary] (Modified) [Objective] To provide a siloxane-modified polyamideimide resin which is soluble in an organic solvent and has a film-forming ability, and a resin composition using the same. [Structure] A polyamideimide structural unit having a weight average molecular weight of 800 to 30,000 represented by the following formula (I-1): Weight average molecular weight represented by the following formula (I-2): 500 to 1 5,000 polysiloxane imide structural units are irregularly arranged at a weight ratio of 0.1 to 99.9% of polyamide imide structural units and 99.9 to 0.1% of polysiloxane imide structural units. Weight average molecular weight 1,000 to 5 10,000 siloxane-modified polyamide-imide resins. [In the formula, A 1 represents a group selected from the following formulas (1) to (6). ] |