ADHESIVE COMPOSITION AND OPTICAL FILM

• Main Authors: FURUE NAOMI, MIYAZAKI HIDEKI, SAITO MASAHITO
• Format: Patent
• Language: English
• Published: 14.04.2011
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; 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; 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; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; USE OF MATERIALS AS ADHESIVES

PROBLEM TO BE SOLVED: To provide an adhesive composition for an optical film which is excellent in durability, suppression of a white spot, and heat-shock resistance in a high temperature environment, and to provide the optical film with the adhesive attached thereto. SOLUTION: The adhesive composition includes: an acrylic polymer (A) which comprises a reactive functional group, has Mw of 1,000,000 to 2,500,000, (Mw/Mn) of 9 to 30, ((Mw/Mn)/(Mz/Mw)) of 2 or more, and Tg of -45°C or lower; an acrylic polymer (B) which has Mw of 50,000 to 300,000, and Tg of -40 to 5°C; 0.01 to 5 pts.wt. of a cross-linking agent (C) with respect to 100 pts.wt. of the mixture of the acrylic polymers; and 1 to 40 pts.wt. of a terpene phenol resin (D) with respect thereto. The optical film has an adhesive layer 3 formed of the adhesive composition. COPYRIGHT: (C)2011,JPO&INPIT