Shiseido Company, Limited

Yuji Matsushita

Masaru Suetsugu

Haruhiko Inoue

Shigeru Mugikura

Haruo Ogawa

Keiko Sakai

Eijiro Hara

Takashi Ohmori

Yosuke Ikebe

Akira Ishikubo

Takafumi Kurosawa

Taizo Fujiyama

Akira Noda

Ayako Ibe

Masanori Yoshimura

Tomonori Toyoda

Kazuho Koiwa

The present invention provides an oil-in-water emulsion cosmetic that is excellent in the resilient and supple (in other words, firm, tensional, and elastic) feel and also excellent in the softness and moisturizing effect. The oil-in-water emulsion cosmetic of the present invention is characterized by comprising the following components: (A) 0.1 to 5 mass % of hydrogenated polyisobutene with a number average molecular weight of 2000 to 3000, (B) 0.1 to less than 1 mass % of higher alcohol, (C) 1 to 25 mass % of an oil component, (D) 0.3 to 5 mass % of surfactant, (E) 0.05 to 5 mass % of water-soluble thickener, and (F) an aqueous component, wherein the blending quantity of nonpolar oil is 30% or lower of the total amount of component (C).

Oil-in-water-type emulsion cosmetic

The present invention provides an oil-in-water cosmetic excellent in emulsion stability. The oil-in-water cosmetic includes (a) oil-droplet particles consisting of an oil component to be emulsified; (b) vesicle particles for stabilizing the oil-droplet particles; and (c) an aqueous phase containing water and a monohydric aliphatic alcohol having 1 to 4 carbon atoms. It is preferred that the vesicle particles are formed with an amphiphilic substance which spontaneously forms vesicle particles, and that they are localized on surfaces of the oil-droplet particles. It is preferred that the amphiphilic substance be a polyoxyethylene hydrogenated castor oil derivative represented by the following formula (I), wherein E=L+M+N+X+Y+Z, and that said E which represents the average addition mole number of ethylene oxide is 10 to 20. 

Oil-in-water cosmetics

The present invention provides an oil-in-water emulsion composition having excellent emulsion stability, low sticky feeling, and low skin irritation. The oil-in-water emulsion composition according to the present invention comprising (a) 1 to 20 mass % of a powder component, (b) 0.001 to 0.5 mass % of a cationic surfactant having two alkyl chains with 12 or more and 22 or less carbon atoms, (c) an oil phase component, and (d) a water phase component, having a structure wherein (a) powder particles are adsorbed on the oil droplets dispersed in the water phase.

Oil-in-water emulsion composition and method for producing the same

The present invention is to provide a new surfactant that can be used as an emulsifier excellent in emulsion stability and texture in use and as a cleanser excellent in cleansing power and texture in use and having low skin irritation. A surfactant consisting of a compound represented by the below-described general formula (1).Y&#x2014;O-(EO)-(AO)-(EO)-X&#x2003;&#x2003;(1)(In the formula, AO represents an oxyalkylene group having 3 to 4 carbon atoms; m is the average addition mole number of the oxyalkylene group and satisfies 5&#x2266;m&#x2266;100. EO represents an oxyethylene group; l and n are the average addition mole numbers of the oxyethylene groups and satisfy 0&#x2266;l&#x2266;4 and 0&#x2266;n&#x2266;4. Either X or Y or both are a functional group represented by &#x2014;SOM, &#x2014;COOM, &#x2014;HPOM, &#x2014;(CH)&#x2014;SOM, or &#x2014;(CH)&#x2014;COO, wherein M is a hydrogen ion or a monovalent inorganic or organic cation, and q is the number of carbon atoms of the linked alkylene group and satisfies 1&#x2266;q&#x2266;4. When either X or Y is the above-described functional group, the other one can be a hydrogen atom, a methyl group, or an ethyl group.)

Surfactant and composition containing the same

Pyridazine derivatives and related composition

Pyridazine derivatives, manufacturing method and related composition

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Yokohama, Japan

Yuji Matsushita