ANTIFOGGING ARTICLE AND METHOD FOR PRODUCING THE SAME

• Main Authors: NOMURA TAKUSHI, HAMAGUCHI SHIGEO, NAKAMURA YUKI
• Format: Patent
• Language: English; Japanese
• Published: 14.01.2021
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; 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; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS

To provide an antifogging article improved in both water absorption of a polyurethane coating film and hardness of the coating film in an antifogging article due to water absorption of a polyurethane coating film.SOLUTION: The antifogging article due to water absorption of a polyurethane coating film, which comprises: a polyurethane coating film formed of a cured product of a polyurethane composition including an isocyanate compound, a water-absorbing polyol comprising an oxyethylene unit as a repeating unit and an acrylic polyol; and a base material comprising the coating film on the principal surface thereof. The isocyanate compound includes a first isocyanate compound having a number of functional groups of isocyanate groups of 1.0 to 3.0 and a second isocyanate compound having a number of functional groups of isocyanate groups of 4.2 to 8.0 and has an average number of functional groups of isocyanate groups of 2.4 to 5.0.SELECTED DRAWING: None 【課題】ポリウレタン被膜の吸水性に基づく防曇性物品において、ポリウレタン被膜の吸水性と、被膜の硬度とが共に改善された、防曇性物品を提供すること。【解決手段】イソシアネート化合物と、オキシエチレンユニットを繰返し単位として備える、吸水性ポリオールと、アクリルポリオールとを含むポリウレタン組成物の硬化物からなるポリウレタン被膜と、該被膜を主面上に備える基材と、を備える、前記ポリウレタン被膜の吸水性に基づく防曇性物品であって、前記イソシアネート化合物は、イソシアネート基の官能基数が１．０〜３．０の第一イソシアネート化合物と、イソシアネート基の官能基数が４．２〜８．０の第二イソシアネート化合物とを含み、イソシアネート基の平均官能基数が、２．４〜５．０であること。【選択図】なし