Kao Corporation

Panasonic Healthcare Co., Ltd.

Mikio Sakaguchi

Ichiro Sakamoto

Kazuo Oki

Kazuhiro Otsuka

Hideaki Koizumi

Hiroshi Itoh

Satoshi Takano

Minoru Iwata

Risa Maejima

Nariyuki Kurotani

Shu Yamaguchi

Masaki Tsumadori

Fumio Sai

Hitoshi Takaya

Mutsumi Kuroda

Hiroji Hosokawa

Ryuichi Akagi

Taisuke Aosaki

Masaya Tsujimoto

Hiroshi Kitagaito

Masaharu Jyono

Hiroki Sugasawa

Kazuo Taguchi

Hiroyuki Yamashita

Masayuki Kato

Shigeo Nakai

Motomitsu Hasumi

Kazuhiko Kiuchi

Hiroyuki Kanai

Kouichi Hatano

Takanori Kotera

Hiroyuki Kondo

Yuichi Sakamoto

Kenichi Tomozawa

Hiroshi Ohtsuka

Hiroshi Suganuma

Takashi Miyaji

Akira Doi

Kunio Fujii

The present invention provides a curable composition allowing a cured product having high aesthetic quality, strength and durability along with having high surface lubricating property to be formed. The curable composition according to the present invention comprises: an inorganic powder and a polymerizable monomer. The inorganic powder contains a spherical crystallization control powder. The spherical crystallization control powder has a silicon dioxide content in the range of 97 to 100 mass %. An amorphous portion and a crystalline portion are mixed within the spherical crystallization control powder. A refractive index difference is not more than 0.05 between the spherical crystallization control powder and a cured product obtained by curing only constituents other than the spherical crystallization control powder.

Curable composition and cured product for dental use

The present invention provides a curable composition allowing a cured product having high aesthetic quality, strength and durability along with having high surface lubricating property. A curable composition in the present invention comprises: an inorganic powder and a polymerizable monomer, wherein the inorganic powder contains a spherical composite powder, the spherical composite powder has a complex of silicon dioxide and at least one of alumina and zirconia, and an amorphous part and a crystalline part are mixed in the spherical composite powder. A refractive index difference is not more than 0.05 between the spherical composite powder and a cured product obtained by curing only a compound excluded the spherical composite powder.

In the present invention, ceramic particles are used as an optical diffusible filler. The present invention provides an optical diffusible material containing ceramic particles, wherein the ceramic particles satisfy the following requirements (I) and (II): (I) the total amount of AlOor MgO and SiOis 80% by weight or more; and (II) the weight ratio of AlOor MgO to SiO((AlOor MgO)/SiO) is 0.1 to 15.

Optical diffusible material

It is an object of the present invention to provide a light diffusing member which has excellent optical transparency and light resistance and has excellent light diffusibility despite of a small amount of filler to be added, and a method for producing the same. The light diffusing member of the present invention is a light diffusing member including a base material and ceramic particles contained in the base material, wherein the ceramic particles have a composition in which the total amount of MgO and AlOis 80% by weight or more and the weight ratio [MgO/AlO] of MgO and AlOis 0.05 to 5.

Light diffusing member with ceramic particles containing magnesium oxide and aluminum oxide

A ceramics particle produced by a flame fusion method, containing MgO and SiOas main components, and having a MgO/SiOweight ratio of from 1.0:1 to 1.45:1, and an average particle size of from 0.001 to 1.5 mm; a spherical molding sand containing MgO and SiOas main components, and having a MgO/SiOweight ratio of from 1.0:1 to 1.45:1, and an average particle size of from 0.001 to 1.5 mm, produced by a flame fusion method; a spherical molding sand, comprising MgO and SiOas main components, and having a MgO/SiOweight ratio of from 1.0:1 to 1.45:1, an average particle size of from 0.001 to 1.5 mm, and a spherical degree of 0.95 or more; a process for producing the above spherical molding sand; a casting mold containing the spherical molding sand as defined above; and a casting produced by casting with the mold as defined above.

Ceramics particle

Molding sand having a high spherical degree and a low hygroscopicity produced from powder containing AlOand SiO, as main components by a flame fusion method, from which a mold having an excellent strength and a smooth surface is produced.

Spherical casting sand

An apparatus for preparing an inorganic spheroidized particle, wherein an inorganic powder is fed from a feed pathway for an inorganic powder to a combustion flame in a powder melting furnace, and melted or softened and spheroidized, and wherein the apparatus comprises a powder dispersing plate in the feed pathway for an inorganic powder; and a process for preparing an inorganic spheroidized particle comprising the step of preparing inorganic spheroidized particles with the apparatus for preparing inorganic spheroidized particles as defined above. The inorganic spheroidized particle prepared by the above process and apparatus can be suitably used for a spherical molding sand, a filler, a pigment or the like, especially in the case where the inorganic spheroidized particle is a ceramics particle.

Apparatus for preparing inorganic spheroidized particle

A process for efficiently preparing fine zeolite particles comprising synthesizing zeolite in the presence of an alkaline earth metal-containing compound and/or with controlling the preparation process of zeolite, thereby giving fine zeolite particles being composed of crystalline aluminosilicate, the fine zeolite particles having a fine average primary particle size, being excellent in the cationic exchange properties and the oil-absorbing ability, having a fine average aggregate particle size, and being excellent in the dispersibility; fine zeolite particles obtainable by the above process; and a detergent composition comprising the fine zeolite particles, the detergent composition being excellent in the detergency.

Process for preparing fine zeolite particles

Process for preparing fine alkaline earth metal zeolite particles

The present invention pertains to a composite powder comprising (A) an alkali metal silicate particle having an average particle size of from 1 to 500 &mgr;m; and (B) a water-soluble salt particle having an average particle size of from 0.01 to 50 &mgr;m, of which solubility to water at 20&deg; C. is 1 g/100 g or more, wherein the alkali metal silicate particle has a composition formula in an anhydride form represented by: xM O.ySiO .zMeO (I) wherein M stands for Na and/or K; Me stands for Ca and/or Mg; y/x is from 0.5 to 4.0; z/x is from 0 to 1.0; and Mg/Ca in MeO is from 0 to 10, and wherein the composite powder has a (A)/(B) weight ratio of from 1/9 to 99/1; and a detergent composition comprising the composite powder. The composite powder is a composite powder having a remarkably enhanced storage stability of the alkali metal silicate without impairing the ion exchange capacity owned by the alkali metal silicate.

Composite powder

An aluminosilicate in an acicular form, a platy form, or a columnar form and having the composition represented by aM O.bAl O .cSiO .dR A .yH O, wherein M is at least one of Na and K; R is one or more elements selected from the group consisting of Na, K, Ca and Mg; A is one or more members selected from the group consisting of CO , SO , NO , OH and Cl; a is from 1 to 6; b is from 2 to 8; c is from 2 to 12; d is from 0 to 4; m is from 1 to 2; n is from 1 to 3; and y is from 0 to 32; a polishing agent including the aluminosilicate; and a detergent composition including the aluminosilicate.

Aluminosilicate

Method for producing crystalline inorganic builders

Method for producing crystalline, inorganic ion exchange material

Method for producing fine solid builder particle

Growing community of inventors

Wakayama, Japan

Mikio Sakaguchi