Novel acid dianhydride, method for preparing same, and polyimide prepared therefrom
AssigneeKolon Industries, Inc.
InventorsHyo Jun PARK, Hak Gee JUNG, Chang Sik HA, Prdip Kumar TAPASWI, Young Sik JEONG
Life of this patent
Estimating the term…
Abstract
The present invention relates to a novel acid dianhydride, a method for preparing the same, and a polyimide prepared therefrom. More specifically, the acid dianhydride according to the present invention is useful as a colorless transparent polyimide unit exhibiting excellent thermal stability and a low dielectric ratio, and the polyimide of the present invention has excellent solubility to an organic solvent compared with the conventional polyimide.
Claims8
An acid dianhydride, represented by the following Chemical Formula 1:
A method for preparing an acid dianhydride, represented by the following Chemical Formula 1, comprising:
- (a) subjecting a compound represented by the following Chemical Formula 2 to N-alkylation in the presence of a base catalyst to give a compound represented by the following Chemical Formula 3;
- and
- (b) converting the compound of Chemical Formula 3 into the compound of Chemical Formula 1 by ring-closing dehydration in the presence of a dehydrating agent:
A polyamic acid, prepared by reacting an acid dianhydride represented by the following Chemical Formula 1 with diamine:
Dependencies are inferred from the claim text.