OPTICAL ADHESIVE, ADHESIVE LAYER, OPTICAL FILM, AND IMAGE DISPLAY DEVICE

• Main Authors: SUGINO SHOKO, SATAKE MASAYUKI, FUJIWARA ARATA
• Format: Patent
• Language: English
• Published: 09.05.2013
• 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; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; 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; PERFORMING OPERATIONS; PHYSICS; POLISHES; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; TRANSPORTING; USE OF MATERIALS AS ADHESIVES

PROBLEM TO BE SOLVED: To provide an adhesive capable of exerting sufficient adhesion properties, excellent in durability, and capable of being used for optical applications without causing the decrease in a polarization degree even under heating and humidification conditions; and to provide an adhesive layer, an optical film having the adhesive layer, and an image display device using the optical film.SOLUTION: The optical adhesive is a polymer composed of two or more monomers, wherein the monomers form two or more different blocks in the polymer, the block is formed of a homopolymer and/or a copolymer composed of two or more monomers, and a refractive index difference between those blocks is 0.015 or lower.