Astom Corporation

Tokuyama Corporation

Shunichiro Nakatsukasa

Kenji Fukuta

Masayuki Kishino

Maki Kinoshita

Katsuhiro Mori

A polymerizable composition for forming an ion-exchange resin precursor, the polymerizable composition containing a monomer component and polyethylene particles in an amount of 50 to 120 parts by mass per 100 parts by mass of the monomer component, wherein the monomer component contains an aromatic monomer for introducing ion-exchange groups and a nitrogen-containing aliphatic monomer, the nitrogen-containing aliphatic monomer being present in an amount of 10 to 35% by mass in said monomer component. An ion-exchange membrane is produced by applying the polymerizable composition onto a polyolefin type filament base material and polymerizing the polymerizable composition to form an ion-exchange resin precursor and, thereafter, introducing ion-exchange groups into the precursor.

Ion-exchange membrane

A primer coating composition is provided for an optical article capable of forming a coating layer having excellent impact resistance, abrasion resistance, adhesion and high refractive index to an optical base material, having high refractive index, specifically a plastic lens without occurrence of poor appearance such as ununiformity, cloudiness, etc. and regardless of the materials of the plastic lens. A primer composition for an optical article may comprises urethane resin having a polycarbonate-derived skeleton, polyester resin, inorganic oxide fine particles and water, and water-soluble organic solvent, if necessary.

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Shunan, Japan

Shunichiro Nakatsukasa