Cellulose ester film, polarizing plate and liquid crystal display

• Main Authors: OKA SHIGEKI, TAKEBE TAKASHI, SHIMIZU KUNIO
• Format: Patent
• Language: Chinese; English
• Published: 15.12.2010
• 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; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

Disclosed is a polarizing plate protection film having excellent stability against polarizer deterioration, polarizing plate dimensions, polarizing plate curling. Specifically disclosed is a cellulose ester film containing a cellulose ester, a polymer X having a weight average molecular weight of not less than 2,000 and not more than 30,000 which is obtained by copolymerizing an ethylenically unsaturated monomer Xa having no aromatic ring and no hydrophilic group in a molecule and another ethylenically unsaturated monomer Xb having no aromatic ring but a hydrophilic group in a molecule, and apolymer Y having a weight average molecular weight of not less than 500 and not more than 3,000 which is obtained by polymerizing an ethylenically unsaturated monomer Ya having no aromatic ring.