Patent ID: 9012537
Filing Date: 2015-04-21
Classification: C08G,C08L

Abstract:
1. A process for producing a polyimide siloxane solution composition by polymerizing/imidizing a tetracarboxylic acid component and a diamine component consisting of (a) a diaminopolysiloxane, (b) a diamine having a carboxyl group and (c) a diamine other than (a) and (b) in a solvent, comprising steps of: polymerizing/imidizing the tetracarboxylic acid component and the diaminopolysioxane component (a) to provide a reaction mixture solution; adding the diamine component (c) to the reaction mixture solution and polymerizing/imidizing the mixture; and adding (b) the diamine having a carboxyl group last to the reaction mixture solution, and polymerizing/imidizing the mixture.