Patent ID: 9388279
Filing Date: 2016-07-12
CPC Classification: C08G,C09D

Claim Text:
1. A composition of preparing a poly(imide-amide) copolymer, comprising: (a) a first poly(imide-amide) oligomer comprising an amino group at both ends thereof, and (b) a second poly(imide-amide) oligomer comprising an anhydride group at both ends thereof, wherein both the first and second poly(imide-amide) oligomers are reaction products of a diamine and a dianhydride, wherein the diamine comprises a diamine represented by Chemical Formula 1 and the dianhydride comprises a dianhydride represented by Chemical Formula 5: wherein, in Chemical Formula 1, R1 and R2 are the same or different, and are each independently selected from a halogen, a hydroxyl group, a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C6 to C20 aryl group, or a substituted or unsubstituted C1 to C10 alkoxy group, n1 and n2 are the same or different, and are each independently an integer from 0 to 4, Ar wherein, in Chemical Formula 2, R R n1 and n2 are the same or different and are each independently an integer ranging from 0 to 4, wherein, in Chemical Formula 3, R R n3 is an integer ranging from 1 to 4, n5 is an integer ranging from 0 to 3, provided that n3+n5 is an integer ranging from 1 to 4, n4 is an integer ranging from 1 to 4, n6 is an integer ranging from 0 to 3, provided that n4+n6 is an integer ranging from 1 to 4, wherein, in Chemical Formula 4, R R n9 and n10 are each independently an integer ranging from 0 to 4, in Chemical Formula 5, R R n7 and n8 are the same or different and are each independently an integer ranging from 0 to 3.