Kao Corporation

Rui Takahashi

Takashi Suzuki

Tetsuya Abe

Koji Endo

Hidetaka Iwai

Takehiko Tojo

Yutaka Yoshida

Naomi Amari

Kenichi Shiba

Yoichiro Imori

Eisuke Miyoshi

Toyoki Hagura

Taisuke Aosaki

Takuji Kume

Akihiro Uda

Ryo Miyasato

Teruo Horizumi

Masato Nakamichi

Makoto Onoo

Provided is a liquid skin external composition which allows a poorly water-soluble component to be applied to a skin in a liquid state. An assembly of fiber for use in production of a liquid skin external composition, the assembly of fiber comprising (a) a polymer soluble in water and an alcohol or a ketone in a content of 50 mass % or more and 98 mass % or less with respect to the whole assembly of fiber and (b) a poorly water-soluble component in a content of 2 mass % or more and 40 mass % or less with respect to the whole assembly of fiber.

Skin external composition

Methods for producing a composition containing a hardly water-soluble aromatic compound are described which involve Step (1), including Step (1-1) for preparing a material comprising: (A) a hardly water-soluble aromatic compound, (B) a polyol, and (C) an aqueous medium, where a content of the (A) hardly water-soluble aromatic compound in the material for heating is below a saturation solubility of the (A) hardly water-soluble aromatic compound in a solvent having the same composition at 25&#xb0; C. The obtained solution is then heated in Step (1-2) at normal pressure at a temperature of less than 100&#xb0; C., to obtain a hardly water-soluble aromatic compound solution 1. Step (2) includes adding water to the hardly water-soluble aromatic compound solution 1 such that the resulting hardly water-soluble aromatic compound solution 2 has a concentration of the (A) hardly water-soluble aromatic compound above a saturation solubility at 25&#xb0; C.

Method for producing composition containing hardly water-soluble aromatic compound

The present invention relates to a method for producing an alkali cellulose with suppressed decrease in the degree of polymerization as well as with small use amount of a basic compound, and to a method for producing a cellulose ether by using the alkali cellulose thus obtained. Provided by the present invention are: (A) a method for producing an alkali cellulose, comprising Step 1 wherein a cellulose-containing raw material is pulverized in the presence of 0.6 to 1.5 mol of a basic compound relative to 1 mol of an anhydroglucose unit that constitutes a cellulose in the said cellulose-containing raw material and under the condition in which the water content therein relative to the cellulose in the cellulose-containing raw material is 10% or less by mass thereby obtaining a cellulose powder mixture having the median diameter of the cellulose-containing raw material made 150 &#x3bc;m or less and Step 2 wherein water content therein is adjusted in the range of 30 to 100% by mass relative to the cellulose by adding water to the cellulose powder mixture thereby obtaining the alkali cellulose in the powder form; and (B) a method for producing a cellulose ether by reacting the alkali cellulose produced by the foregoing production method with an etherification agent.

Method for producing alkali cellulose

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Wakayama, Japan

Rui Takahashi