POLYIMIDE FILM HAVING HIGH YIELD STRAIN

• Main Authors: AHN KYUNGIL, LEE HOYONG, SHIM JAEHYUN, KIM WONKYUM, KIM DONGYOUN
• Format: Patent
• Language: English; Korean
• Published: 23.06.2021
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; 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; 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; WORKING-UP

The present invention relates to a polyimide film copolymerized by including: at least one diamine; and at least one acid dianhydride, and more specifically, to a polyimide film, which can be used as cover window of a display by simultaneously securing high yield strain (Y/S) and flexural properties while having excellent transparency. 본 발명은 적어도 1종의 디아민; 및 적어도 1종의 산이무수물을 포함하여 공중합된 폴리이미드 필름으로서, 보다 상세하게는 투명성이 우수하면서, 높은 항복 변형(Y/S)과 굴곡 특성을 동시에 확보하여 디스플레이의 커버윈도우로 사용될 수 있는 폴리이미드 필름에 관한 것이다.