AQUEOUS DISPERSION-TYPE PRESSURE-SENSITIVE ADHESIVE COMPOSITION, METHOD FOR PRODUCING THE SAME, ADHESIVE OPTICAL FILM, AND IMAGE DISPLAY DEVICE

• Main Authors: OKADA MIYOSHI, NAITO TOMOYA
• Format: Patent
• Language: English
• Published: 18.12.2008
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PHYSICS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES

PROBLEM TO BE SOLVED: To provide an aqueous dispersion-type pressure sensitive adhesive composition high in adhesiveness, heat resistance, and in moisture resistance, to provide an adhesive optical film having an adhesive layer comprised of the aqueous dispersion-type pressure sensitive composition, and to provide an image display device and a method for producing the aqueous dispersion-type pressure sensitive composition. SOLUTION: The method for producing the aqueous dispersion-type pressure sensitive adhesive composition comprises preparing a dispersion, wherein a silica fine particle is dispersed in monomer components, obtained by formulating the monomer components, that contain an alkyl (meth)acrylate, a carboxyl group-containing vinyl monomer and a phosphoric acid group-containing vinyl monomer as essential components, and a vinyl monomer capable of copolymerizing with the essential components as an optional component, with a hydrophobilized silica fine particle, then preparing an emulsion by emulsifying the dispersion so that a volume-based median diameter of oil drops becomes 500 nm or less, and finally performing polymerization of the monomers in the emulsion in the presence of an initiator. COPYRIGHT: (C)2009,JPO&INPIT