Acryl film having low moisture permeability

• Main Authors: KANG JI HYE, KANG KYUNG RYUN, KIM KYUNG SOO, EUN JONG HYUK
• Format: Patent
• Language: English; Korean
• Published: 30.10.2019
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; 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; 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 provides an acrylic film which has 0-5 nm of an in-plane retardation Ro measured under conditions of 23°C and 55%RH and -10 to -3 nm of retardation Rth in the thickness direction, and has 150 g/m^2·24h or less of moisture permeability under high temperature and humidity of 60°C and 90%RH by manufacturing a main dope liquid containing a compound represented chemical formula 1 and acrylic resins by a solvent casting method. In chemical formula 1, R1 is an substituted or unsubstituted C6-C50 aryl group for a ring formation. R2 and R3 are independently hydrogen atoms, halogen atoms, hydroxy groups or substituted or unsubstituted C1-C12 alkyl groups, the ratio of m to n is 100:0 to 50:50, and a molecular weight is 130,000 to 200,000 g/mol. The present invention can manufacture a low permeable acrylic film with controlled phase difference. 본 발명은 하기 화학식 1로 표시되는 화합물 및 아크릴 수지를 포함하는 주 도프액을 솔벤트 캐스팅 방법으로 제조하여, 23℃, 55％RH의 조건하에서 측정한 면내 리타데이션 Ro가 0 내지 5nm 이고, 두께 방향 리타데이션 Rth가 -10 내지 -3nm이고, 60℃, 90%RH의 고온 다습한 환경에서 투습도가 150g/m·24h 이하인 아크릴 필름을 제공한다. [화학식 1]상기 화학식 1에서,R1은 치환 또는 비치환된 고리 형성 탄소수 6~50의 아릴기이고, R2 및 R3는 각각 독립적으로 수소 원자, 할로겐 원자, 하이드록시기, 또는 치환 또는 비치환된 탄소수 1~12의 알킬기이며, m과 n의 구성비는 100 : 0 내지 50 : 50이고, 분자량은 130,000g/mol 내지 200,000g/mol이다.