POLYCARBONATE RESIN AND OPTICAL FILM

• Main Authors: OKADA YOUHEI, MOTOYOSHI TETSUYA, YAMANAKA KATSUHIRO, ODA KOUJI
• Format: Patent
• Language: English; Korean
• Published: 30.11.2016
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; 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 ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

(A) 하기 식으로 나타내는 단위 (A),[식 중, R및 R는 각각 독립적으로, 수소 원자, 탄소 원자수 1 ∼ 10 의 방향족기를 함유해도 되는 탄화수소기 또는 할로겐 원자를 나타내고, m 및 n 은 각각 독립적으로 0 ∼ 4 의 정수를 나타낸다] (B) 하기 식으로 나타내는 단위 (B),[식 중, R및 R는 각각 독립적으로, 수소 원자, 탄소 원자수 1 ∼ 10 의 방향족기를 함유해도 되는 탄화수소기 또는 할로겐 원자를 나타내고, R및 R은 각각 독립적으로, 탄소 원자수 1 ∼ 10 의 방향족기를 함유해도 되는 탄화수소기를 나타내고, s 및 t 는 각각 독립적으로 0 ∼ 4 의 정수를 나타내고, p 및 q 는, 각각 독립적으로 1 이상의 정수를 나타낸다] 및 (C) 지방족 디올 화합물 및/또는 지환족 디올 화합물로부터 유도되는 카보네이트 단위 (C) 를 함유하고, 하기 식 (I) ∼ (Ⅱ) 를 만족시키는, 이상적인 광대역에 가까운 파장 분산 특성을 갖고, 내구 안정성, 가요성이 우수하며, 위상차 발현성이 높고, 광탄성 상수가 낮으며, 용융 가공성이 우수한 폴리카보네이트 수지 및 그것으로부터 이루어지는 광학 필름을 제공한다. (I) 단위 (A) 와 단위 (B) 의 몰비 (A)/(B) 가 0.2 ∼ 11.0 (Ⅱ) 단위 (A) ＋ 단위 (B) 와 단위 (A) ＋ 단위 (B) ＋ 단위 (C) 의 몰비 {(A ＋ B)/(A ＋ B ＋ C)} 가 0.30 ∼ 0.60 Provided are a polycarbonate resin and an optical film formed therefrom, having wavelength dispersion characteristics close to the ideal broad bandwidth, excellent durable stability and flexibility, high retardation developability, a low photoelastic constant, and excellent melt processability, comprising: a unit (A) represented by the following formula: [wherein R 1 and R 2 each independently represent a hydrogen atom, hydrocarbon group having 1 to 10 carbon atoms optionally containing an aromatic group, or a halogen atom, and m and n each independently represent an integer of 0 to 4], a unit (B) represented by the following formula: [wherein R 3 and R 4 each independently represent a hydrogen atom, hydrocarbon group having 1 to 10 carbon atoms optionally containing an aromatic group, or a halogen atom, R 5 and R 6 each independently represent a hydrocarbon group having 1 to 10 carbon atoms optionally containing an aromatic group, s and t each independently represent an integer of 0 to 4, and p and q each independently represent an integer of 1 or more], and a carbonate unit (C) derived from an aliphatic diol compound and/or alicyclic diol compound, wherein the polycarbonate resin satisfies the following expressions (I) and (II): (I) the molar ratio of unit (A) to unit (B), (A) / (B), is 0.2 to 11.0, and (II) the molar ratio of unit (A) + unit (B) to the (A) + unit (B) + unit (C), {(A+B) / (A+B+C)}, is 0.30 to 0.60.