Patent ID: 9580555
Date: 2017-02-28
CPC Classifications: C08G,C08J,C08L

Claim:
1. A polyamide-imide resin, which is an imide of a polyamic acid resulting from copolymerizing an aromatic dianhydride and an aromatic dicarbonyl compound with an aromatic diamine, wherein the aromatic dicarbonyl compound is contained in an amount of 1 to 50 mol % based on a total molar amount of the aromatic dianhydride and the aromatic dicarbonyl compound, the aromatic dianhydride includes (i) 4,4′-hexafluoroisopropylidene diphthalic anhydride (6FDA) and (ii) at least one selected from among cyclobutanetetracarboxylic dianhydride (CBDA) and cyclopentanetetracarboxylic dianhydride (CPDA), and the aromatic diamine includes 2,2′-bis(trifluoromethyl)-1,1′-biphenyl-4,4′-diamine (TFDB).