Daihachi Chemical Industry Co., Inc.

Osaka Research Institute of Industrial Science and Technology

Osaka Municipal Technical Research Institute

Seiji Watase

Manabu Hirata

Kimihiro Matsukawa

Koji Mitamura

An objective of the present invention is to provide an organic-inorganic hybrid acrylic polymer having an increased refractive index, which has a higher transparency and a less impaired scratch resistance; a metal oxide dispersion and a polymerizable composition as materials for the polymer; and the organic-inorganic hybrid polymer capable of being produced in a crack-free manner. Another objective of the present invention is to provide a high-performance antireflection film using the organic-inorganic hybrid polymer. The metal oxide dispersion of the present invention comprises a phosphorus compound represented by Formula (1): (wherein, Ris a hydrogen atom, an alkyl group, an alkynyl group, an alkenyl group, an aryl group, an aliphatic heterocyclic group, or an aromatic heterocyclic group; Ris an organic residue; and n is 1 or 2) and a metal oxide.

Metal oxide dispersion, polymerizable composition comprising the metal oxide dispersion, and polymer thereof

Provided are a method for easily and quickly producing a patterned thin film having a high refractive index and a high transparency, and a highly refractive thin film produced by the method. The method comprises a first step: a step of forming, on a substrate, a coating using a sol containing a metal oxide modified with a phosphorus compound represented by the following formula (1): (wherein Ris a hydrogen atom, an alkyl group, an alkynyl group, an alkenyl group, an aryl group, an aliphatic heterocyclic group, or an aromatic heterocyclic group; Ris a divalent organic residue; and n is 1 or 2); a second step: a step of curing the coating on the substrate obtained in the first step by light irradiation; and a third step: a step of further adding energy to the cured film obtained in the second step by heating and/or light irradiation.

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Osaka, Japan

Seiji Watase