Seiko Epson Corporation

Nippon Oil Fats Co., Ltd.

Catalysts & Chemicals Industries Co., Ltd.

Takeaki Iryo

Satoshi Kubota

Hirokazu Tanaka

Yasumi Koinuma

Yoshishige Murata

Katsuyoshi Takeshita

Kazunori Miyashita

Masafumi Hirai

Shuitsu Hiraoka

Tatsuhisa Uchino

Yoshio Sano

Disclosed is a film-forming coating solution comprising a matrix and a fine particulate compound oxide composed of oxides of titanium, silicon and zirconium and/or aluminum. This film-forming coating solution can form a colorless and transparent film of high refractive index which is excellent in dyeing property and adhesion to the substrate. Also disclosed is a synthetic resin lens of high refractive index having a film (hard coat film) formed from the film-forming coating solution on the surface. This synthetic resin lens is free from interference fringe and has a reduced thickness.

Film-forming coating solution and synthetic resin lens

A Synthetic resin lens having a surface hard coating comprises a synthetic resin lens body and a surface hard coat deposited on the lens body. The synthetic resin lens body is made of a resin obtained by copolymerizing monomers consisting essentially as synthetic resinous components of 10 to 80 percent by weight of at least one diester of itaconic acid and mesaconic acid, 10 to 80 percent by weight of at least one allyl compound and 5 to 50 percent by weight of diethyleneglycol bis(allylcarbonate). The surface hard coat is formed by curing a coating composition comprising 50 to 800 parts by weight of at least one organic silicon compound, 100 parts by weight of colloidal silica, 50 to 600 parts by weight of a polyfunctional compound such as a polyfunctional epoxy compound, a polyalcohol, a polycarboxylic acid, or a polycarboxylic anhydride and 0.01 to 5.0 percent by weight of a curing catalyst based on the residual solids in the composition after curing.

Synthetic resin lens

Growing community of inventors

Nagano, Japan

Takeaki Iryo