Patent ID: 7026436
Filing Date: 2006-04-11
Classification: B32B,C08G,H05K,Y10S,Y10T

Abstract:
1. A polyimide adhesive composition comprising: a polylimide base polymer synthesized by contacting an aromatic dianhydride with a diamine component, the diamine component comprising about 50 to about 90 mole % aliphatic diamine and about 10 to about 50 mole % aromatic diamine, wherein the aliphatic diamine is hexamethylene diamine (HMD), wherein the aromatic diamine is 1,3-bis-(4-aminophenoxy) benzene, and wherein the aromatic dianhydride is a combination of 3,3′,4,4′-benzophenone tetracarboxylic dianhydride (BTDA) and 3,3′,4,4′-biphenyl tetracarboxylic dianhydride (BPDA), said polyimide base polymer having a glass transition temperature from about 150, 160, 170, 180, or 185 to about 190, 195, 197 or 200° C.