PRESSURE-SENSITIVE ADHESIVE COMPOSITION FOR OPTICAL FILM, PRESSURE-SENSITIVE ADHESIVE TYPE OPTICAL FILM AND IMAGE DISPLAY DEVICE

• Main Authors: SUGINO SHOKO, YANO KOHEI, FUJIWARA ARATA, KOJIMA OSAMU, INOUE SHINICHI
• Format: Patent
• Language: English
• Published: 05.11.2009
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMISTRY; 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; DYES; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FREQUENCY-CHANGING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-LINEAR OPTICS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PAINTS; PHYSICS; POLISHES; SEMICONDUCTOR DEVICES; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; USE OF MATERIALS AS ADHESIVES

PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive composition for an optical film, and a pressure-sensitive adhesive type optical film using it, forming a pressure sensitive adhesive layer which may satisfy rework ability to be easily released from a member, such as an optical film, and workability or durability to be worked without causing disadvantages, such as contamination, lifting and separation of a pressure-sensitive adhesive, after a pressure sensitive adhesive layer is formed on the optical film. SOLUTION: This pressure sensitive adhesive composition for the optical film is prepared so that as a monomer unit, 50 wt.% or more alkyl (meth)acrylate is contained, (meth)acrylic polymer has a weight average molecular weight by gel permeation chromatography of 1,500,000 or higher, and 0.01-1 pts.wt. silane coupling agent, 0.01-10 pts.wt. siloxane compound of a specific structure, 0.01-5 pts.wt. cross linking agent are contained with respect to 100 pts.wt. (meth)acrylic polymer. COPYRIGHT: (C)2010,JPO&INPIT