SELF-ADHESIVE COMPOSITION FOR OPTICAL USE AND OPTICALLY FUNCTIONAL FILM

• Main Authors: NAGAKURA TAKESHI, TANABE MASAYUKI
• Format: Patent
• Language: English
• Published: 05.02.2009
• 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 a self-adhesive composition to be used in liquid crystal cells constituting a liquid crystal display device, intended for forming a self-adhesive layer capable of preventing such a liquid crystal display device from color unevennesses and/or white-spot phenomena stemming from the stretch/contraction of the optically functional film used in the device. SOLUTION: The self-adhesive composition for optical use essentially comprises a (meth)acrylic ester copolymer (A) 1,000,000-2,000,000 in weight-average molecular weight and a plasticizer (B) containing two aromatic groups, wherein the content of the plasticizer B stands at 3-50 mass% of that of the copolymer A. In this composition, the copolymer A contains 10-40 mass% of constituents as a monomer mixture of monomers each represented by general formula (I) (wherein, n is 1 or ≥2), wherein the monomers with n being ≥2 account for 1-5 mass% of the whole amount of the mixture. COPYRIGHT: (C)2009,JPO&INPIT