SURFACE COATING AGENT OF PLASTIC FILM FOR OPTICAL FILM AND OPTICAL FILM USING THE SAME

• Main Authors: SHIRAGA JUN, HIGESHIRO TOMOKAZU, KITADA MITSURU
• Format: Patent
• Language: English
• Published: 15.01.2009
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; 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; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; PHYSICS; POLISHES; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To provide a coating agent capable of imparting excellent adhesiveness and blocking resistance to a polyester substrate and being used mainly for surface-coating a plastic film constituting an optical film. SOLUTION: The surface coating agent of a plastic film for an optical film is prepared by dispersing in an aqueous medium core-shell type vinyl polymer particles (A) having a minimum film forming temperature of ≤20°C, wherein the vinyl polymer particles (A) have an aromatic cyclic structure-containing vinyl polymer (A-I) having a glass transition temperature of 50-150°C in the core part and a vinyl polymer (A-II) having a glass transition temperature of -20 to 20°C in a shell part. COPYRIGHT: (C)2009,JPO&INPIT