Showa Denko K.k.

Showa Denko Kabushiki Kaisha

Kazuo Sekiguchi

Nobuaki Ishii

Koichi Wada

Michihiro Takama

Hiroyuki Takahashi

Kuniomi Marumo

Yoshikazu Hosoda

Shinobu Ito

Kotaro Yano

Keiji Kawasaki

Eiichi Yoshida

Norio Kametaka

Yasuo Saito

Takashi Onouchi

Hironori Sugai

Mitsuharu Irie

Kiyonori Tokuda

Cosmetic preparation, surface-hydrophobized silica-coated metal oxide particles, sol of silica-coated metal oxide, and processes for producing these

Homogeneously surface-fluorinated metal oxide particulates, process for manufacturing the same, and use of the same

Cosmetics comprising silica-coated metal oxide powder having a thickness of the silica coating of 0.1 to 100 nm, and a photocatalytic activity as measured by tetralin auto-oxidation method of 6 mmH,O/min or less. Silica-coated metal oxide powder coated with a silica coating having an absorption peak intensity ratio I (I&equals;I,/I,, wherein I,is an absorption peak intensity at 1,150 to 1,250 cm,and I,is an absorption peak intensity at 1,000 to 1,100 cm,) between the infrared absorption spectra in the region of 1,150 to 1,250 cm,and the region of 1,000 to 1,100 cm,of 0.2 or more, and having a refractive index of 1.435 or more.

Cosmetics, silica-coated metal oxide powder and production method therefor

Water-soluble microcapsules using a water-containing hydrophilic substance as a core material and at least one member selected from the group consisting of polyvinyl alcohol and modified polyvinyl alcohols as a coating material are stably retained in a concentrated aqeuous solution and are dissolved in water or a dilute aqueous solution.

Water-soluble microcapsules

Ethyl acetate and an excess of ethylene glycol monoethyl ether are subjected to ester-interchange reaction at a temperature not exceeding 100.degree. C. in the presence of a strongly acidic cation exchange resin as a catalyst. The resulting reaction mixture is distilled to recover the ethylene glycol monoethyl ether acetate formed. The unchanged reactants are recycled to the reaction zone for re-use, and the by-product ethanol is recovered in a highly pure form. This method can be continuously performed easily and effectively without the need to separate the catalyst or to employ complex distilling steps and without involving other difficulties.

Process for the continuous production of ethylene glycol monoethyl ether

Growing community of inventors

Kawasaki, Japan

Kazuo Sekiguchi