Shiseido Company, Limited

Kenji Kurokawa

Reiji Miyahara

Tetsuro Yonezawa

Kouichi Kinoshita

The present invention provides an intermediate composition enabling to prepare easily and steadily an &#x3b1;-gel-containing O/W emulsion cosmetic that has a very small viscosity change over time and is excellent in emulsion stability, without using a cooling device that has a heavy burden on cost and the environment, and a production method thereof. An &#x3b1;-gel intermediate composition consisting of (A) 20 to 80 mass % of a mixture containing one or more higher alcohols having 16 or more carbon atoms and an anionic surfactant in the mole ratio of 3:2 to 5:1, and (B) 20 to 80 mass % of a mixture containing one or more water-soluble solvents having the IOB value of 1.5 to 3.5 and water in the mass ratio of 5:5 to 8:2, and wherein the composition is a liquid consisting of a bicontinuous microemulsion phase or a lamellar liquid crystal-dispersed bicontinuous microemulsion phase at 65 to 85&#xb0; C. and a solid at room temperature.

&#x3b1;-gel-intermediate composition, and production method for &#x3b1;-gel-containing O/W emulsion cosmetic using said composition

A hair conditioning composition containing very little water from which a hair conditioner can be easily produced by diluting with water, and a low energy production method thereof. A hair conditioning composition including (a) 10 to 90% by mass of specifically structured higher alcohols and/or derivatives thereof, (b) 5 to 35% by mass of cationic surfactant, and (c) a polyhydric alcohol and/or polyethylene glycol having a melting point of 70&#xb0; C. or less, wherein the melting point of a gel which is formed from (a) and (b) in the composition is 70&#xb0; C. or less, the water content is 10% by mass or less, and the molar ratio of (a) to (b) is 2.5 or more to less than 6.0. Also, a low energy method of producing a hair conditioner by melting the hair conditioning composition under heating at the temperature of the melting point of gel or more to 70&#xb0; C. or less, and diluting it with water in an amount of 3 to 15 times by mass.

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Yokohama, Japan

Kenji Kurokawa