Nippon Chemical Industrial Co., Ltd.

Toho Ganryo Kogyo Co., Ltd.

Toro Ganryo Kogyo Co., Ltd.

Minoru Yokoyama

Nobuyoshi Abe

Kiyoshi Kanemaru

Takashi Shigematsu

Takahiro Nagayama

Hiroyuki Matsubara

Kazuo Konno

Syozo Takatsu

Rust-preventive pigment composition and rust-preventive paints

A stable lead chromate pigment composition comprising a lead chromate pigment which has been treated by forming a continuous amorphous silica encapsulation on the surface of each particle of the pigment and subsequently depositing an antimony compound on the silica encapsulation and the process for producing the same.

Stable lead chromate pigment composition and process for producing the

A stable inorganic pigment having the surface thereof a continuous coating of fine amorphous silica.

Method of coating inorganic pigments (ultramarine and bronze powder)

A process for preparing a stable inorganic pigment coated with a fine amorphous silica which comprises forming a silica sol in an aqueous prepared slurry of an inorganic pigment by reacting an alkali silicate solution with one or more acid gases so that a fine silica sol covers the surfaces of the particles of the inorganic pigment.

Process for preparing stable inorganic pigment

Growing community of inventors

Tokyo, Japan

Minoru Yokoyama