Asahi Kasei Kogyo Kabushiki Kaisha

Shizuo Ishijima

Takeshi Kiritani

Yukio Hayashi

Tsunesuke Doi

Yasunobu Imasato

Described is a water-dispersible paste composition of metal powder which contains:

Organic phosphoric ester containing water-dispersible aluminum paste as

Water-dispersible paste composition of metal powder

Novel metal flake pigments suitable for use in coating compositions, which have a good filtration property and good dispersion stability, and which produce coatings having good specular gloss, sharpness of image and hiding power, are presented. These metal flake powders contain metal flakes, between which no substantial aggregation is formed and which have a specific surface area, determined by a BET method, of 65 through 250 m.sup.2 /cm.sup.3, and have such a particle size distribution that at least 99.5% of the flakes pass through a screen having an opening size of 20 microns and at least 90% of the flakes pass through a screen having an opening size of 5 microns. These metal flakes are produced by wet milling small metal pieces or particulates in the presence of a milling aid, including higher fatty acids and the derivatives thereof, in an amount sufficient to cover the surfaces of the metal flakes in a bi-molecule layer.

Metal flake pigment and method of preparing the same

A novel aqueous aluminum paste composition comprising specific amounts of a fatty acid, a fatty acid alkanolamide and a nonionic surface active agent other than the fatty acid alkanolamide as well as aluminum flakes, and water. The aqueous aluminum paste composition is well dispersible and stably storable in water and has good bubble retention characteristics when used as a foaming agent in the manufacture of light-weight foamed concrete.

Growing community of inventors

Mishima, Japan

Shizuo Ishijima