Patent ID: 9334370
Filing Date: 2016-05-10
CPC Classification: B29C,B29K,B29L,C08G,C08K,C09D

Claim Text:
1. A poly(imide-amide) copolymer comprising a structural unit represented by Chemical Formula 1, a structural unit represented by Chemical Formula 2, and a structural unit represented by Chemical Formula 3: wherein in Chemical Formulae 1 to 3, comprises a structural unit represented by at least one of Chemical Formula 8 and Chemical Formula 9: wherein in Chemical Formulae 8 and 9, R n7 and n8 are the same or different and each are independently an integer ranging from 0 to 3; and  comprises a structural unit represented by Chemical Formula 6: wherein in Chemical Formula 6, 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, and 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 2, R R n is an integer of 1 to 3; and wherein in Chemical Formula 3, R