Invention Grant
US08545975B2 Articles comprising a polyimide solvent cast film having a low coefficient of thermal expansion and method of manufacture thereof 有权
具有热膨胀系数低的聚酰亚胺溶剂流延膜及其制造方法的制品

Articles comprising a polyimide solvent cast film having a low coefficient of thermal expansion and method of manufacture thereof
Abstract:
A solvent cast film comprises a polyimide comprising structural units derived from polymerization of a dianhydride component comprising a dianhydride selected from the group consisting of 3,4′-oxydiphthalic dianhydride, 3,3′-oxydiphthalic dianhydride, 4,4′-oxydiphthalic dianhydride, and combinations thereof, with a diamine component comprising 4,4′-diaminodiphenylsulfone; wherein the polyimide has a glass transition temperature from 190° C. to 400° C.; and wherein the film has a coefficient of thermal expansion of less than 60 ppm/° C., a thickness from 0.1 to 250 micrometers, endless than 5% residual solvent by weight.
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