PHOTOCURABLE ADHESIVE COMPOSITION, POLARIZING PLATE AND A PROCESS OF PRODUCING THE SAME, OPTICAL MEMBER, AND LIQUID CRYSTAL DISPLAY DEVICE

• Main Authors: TAKEUCHI TOMOYASU, INADA KAZUMASA, FUJITA MASAHIRO, SANAI YASUYUKI
• Format: Patent
• Language: English; Korean
• Published: 12.10.2011
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; DYES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PAINTS; PHYSICS; POLISHES; USE OF MATERIALS AS ADHESIVES

PROBLEM TO BE SOLVED: To provide a photocurable adhesive with which a protective film is bonded to a polarizer with sufficient adhesive strength in a short-time process even when a resin film with low moisture vapor transmission is used as the protective film, and which has low viscosity, and with which no problem such as poor appearance is caused after an endurance test, and to provide a polarizing plate including a polarizer with the protective film bonded thereto by using the adhesive.SOLUTION: The photocurable adhesive composition is an adhesive composition used for the purpose of bonding the protective film which is composed of a transparent resin film selected from predetermined four kinds of transparent resin films to the polarizer composed of a polyvinyl alcohol-based resin film, and includes: (A) an epoxy compound having two or more epoxy groups and one or more aromatic rings; (B) a di(meth)acrylate of a 5-10C diol (except an ether compound) optionally having an ester skeleton; and (C) a cationic photopolymerization initiator, and 20-60 wt.% of the component (A), 5-45 wt.% of the component (B), and 0.5-10 wt.% of the component (C) are included in the composition.