Polyamide-imide copolymer film and method of preparing polyamide-imide copolymer
AssigneeKolon Industries, Inc.
InventorsHyo Jun Park, Hak Gee Jung
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Abstract
Disclosed herein is a polyamide-imide copolymer film, comprising a copolymer resin in which a unit structure derived from TFDB (2,2′-bis-trifluoromethyl-4,4′-biphenyl diamine), a unit structure derived from 6FDA (4,4′-(hexa-fluoroisopropylidene)diphthalic anhydride) and a unit structure derived from TPC (Terephthaloyl chloride; 1,4-benzenedicarbonyl chloride) are copolymerized.
Claims5
A polyamide-imide copolymer film, comprising a copolymer resin which is obtained by copolymerizing a unit structure derived from (2,2′-bis-trifluoromethyl-4,4′-biphenyl diamine (TFDB), a unit structure derived from (4,4′-(hexa-fluoroisopropylidene)diphthalic anhydride (6FDA) and a unit structure derived from terephthaloyl chloride (TPC),
- wherein the copolymer resin contains the unit structure derived from TFDB, the unit structure derived from 6FDA, and the unit structure derived from TPC in a molar ratio of 1:0.2-0.8:0.8-0.2.
A method of preparing a polyamide-imide copolymer, comprising the step of:
- solution-reacting 2,2′-bis-trifluoromethyl-4,4′-biphenyl diamine (TFDB) with 4,4′-(hexa-fluoroisopropylidene)diphthalic anhydride (6FDA) to prepare a first polymer, and then solution-reacting the first polymer with terephthaloyl chloride (TPC) to prepare polyamic acid;
- and
- imidizing the polyamic acid in the presence of an imidization catalyst,
- wherein the copolymer resin is a copolymer resin in which the unit structure derived from TFDB, the unit structure derived from 6FDA, and the unit structure derived from TPC are copolymerized in a molar ratio of 1:0.2-0.8:0.8-0.2.
Dependencies are inferred from the claim text.