Kao Corporation

Satoshi Tsujita

Takashi Imamura

Yasuteru Eguchi

Shigeto Kayane

Manabu Tonomura

Koji Maeda

A colloidal solution comprises a fluoride(s) being difficultly soluble in water comprises colloidal particles of the fluoride having a particle size of 0.005 to 1 micron, said fluoride having a fluoride ion concentration of 1 to 10,000 ppm in the state of saturation.

Fluoride colloid and oral composition

A colloidal solution comprises a fluoride(s) being difficultiy soluble in water comprises colloidal particles of the fluoride having a particle size of 0.005 to 1 micron, said fluoride having a fluoride ion concentration of 1 to 10,000 ppm in the state of saturation.

Oral compositions containing colloidal fluoride

A novel granular composition comprises a water-insoluble powder material and a water-insoluble inorganic binder capable of binding said water-soluble powder material. Granules in the composition have a specific diameter and collapse under a load of 0.1-10 g per one grain of granule. The granular composition is preferably incorporated into a dentifrice, and granules incorporated therein can be recognized as granules in the mouth, however, polishing effect of the teeth can be acknowledged with almost no unpleasant feel of foreign substance.

Granular composition and dentifrice containing the same

A toothbrush capable of removing the sordes from the teeth excellently, and massaging the gums effectively without paining or hurting the same. The toothbrush has a handle, and bristles implanted into the handle, characterized in that all of the bristles have spherical portions formed at the free ends thereof, these bristles consisting of bristles of not less than two kinds of lengths, a difference between the length of the longest bristles and that of the shortest bristles being within the range of 1-4 mm, the bristles being arranged in such an implantation pattern that the bristles of an equal length do not gather locally so as to prevent the spherical portions thereof from contacting one another, whereby these bristles are not bent outward.

Growing community of inventors

Tochigi, Japan

Satoshi Tsujita