Kusumoto Chemicals, Ltd.

Chihiro Hamazaki

Daisuke Shimizu

Shigehiro Kawahito

Junpei Suetou

Katsura Naganuma

Kenichi Asano

Hideki Satake

Eiichi Sato

Provided is the so-called agent imparting the distinctness of image, namely, an additive for an aqueous coating material that can improve the distinctness of image of the coating film of any glossy aqueous coating material in order to prevent the white blurring phenomenon, which is caused by diffuse reflection of light, to a degree that could not be previously achieved, by increasing the dispersivity of a carbon black or an organic pigment in a coating material resin. Catecholic polymer black microparticles that exhibit an angle-independent structural color are used as the agent imparting the distinctness of image.

Additive for aqueous coating material for imparting distinctness of image to coating film

This invention provides a viscosity modifier for high concentration dispersion of inorganic fine particles which can reduce, by giving excellent viscosity modifying function to a high concentration dispersion of inorganic fine particles (e.g., printing ink composition, functional paste composition or paint composition, of high concentration dispersion of inorganic fine particles), the occurrence of inconvenience in a printing step or coating step for the manufacture of components or substrates, and also provides a high concentration dispersion of inorganic fine particles which contains said viscosity modifier. This viscosity modifier comprises, as a main component, a reaction product having 2 to 20 phosphate groups or carboxyl groups in molecular structure, which reaction product is produced from a reaction between a polyol having two to six hydroxyl groups and a phosphate group-introducing material or a carboxyl group-introducing material at a molar ratio of hydroxyl group to phosphate group-introducing material or carboxyl group-introducing material of 3:1 to 1:1.

Viscosity modifier for high concentration dispersion of inorganic fine particles and high concentration dispersion of inorganic fine particles which contains the same

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Saitama-ken, Japan

Chihiro Hamazaki