Polyimide precursor composition and method for producing polyimide film using the same

• Main Authors: AN MIN SHI, KIM, DONG MIN, CHO, YOUNG WOON, PARK, SE JOO, CHA, YOUNG CHUL
• Format: Patent
• Language: English; Korean
• Published: 20.02.2019
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CALCULATING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; COMPUTING; COUNTING; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; ELECTRIC DIGITAL DATA PROCESSING; FREQUENCY-CHANGING; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

Disclosed is a polyimide precursor composition which can be used for manufacturing a flexible substrate, a method for manufacturing a polyimide film using the same, and a display device comprising the polyimide film. The polyimide precursor composition comprises: a mixed solvent containing 1-ethyl-2-pyrrolidone and N,N-dimethylpropionamide; and polyamic acid or polyimide. A purpose of the present invention to provide an environmentally friendly polyimide precursor composition using a novel mixed solvent replacing a solvent which is a target of environmental regulation. 플렉서블 기판의 제조에 사용될 수 있는 폴리이미드 전구체 조성물, 이를 이용한 폴리이미드 필름 제조방법 및 폴리이미드 필름을 포함하는 디스플레이 소자가 개시된다. 상기 폴리이미드 전구체 조성물은 1-에틸-2-피롤리돈과 N,N-디메틸프로피온아미드를 포함하는 혼합 용매; 및 폴리아믹산 또는 폴리이미드를 포함한다.