Shin-etsu Chemical Co., Ltd.

Shin-etsu Chemical C O., Ltd.

Takuya Abe

Masanao Kamei

Masayuki Konishi

Chihiro Hayakawa

Koji Sakuta

Tsuneo Kimura

Akihiro Kobayashi

Ryuichi Inaba

Yuko Takada

Tomoya Kanai

Yoshinori Takamatsu

Hiroomi Iyoku

A water-dispersion emulsion composition containing: (A) an anionic surfactant; (B) an organopolysiloxane having at least two hydrosilyl groups in one molecule thereof shown in formula (I); (C) an organopolysiloxane having at least two olefinic unsaturated groups in one molecule thereof shown in formula (II); (D) a monohydric or polyhydric alcohol; and (E) water, where the water-dispersion emulsion composition has a milky-white appearance at 25° C. and has emulsion particles that are spherical particles having an average particle size of 2.0 μm or less. This provides: a water-dispersion emulsion composition that gives a cosmetic having reduced stickiness, excellent feeling on use, refreshing feeling, and temporal stability, and particularly excellent cosmetic sustainability, abrasion resistance, and soft focus effect; an emulsion addition-cured composition obtained by addition-curing the same; and a cosmetic formulated with the emulsion addition-cured composition.

Water-dispersion emulsion composition, method for manufacturing the same, emulsion addition-cured composition, and cosmetic

Described herein is a crosslinked organosilicone resin that has a crosslinked structure formed by reacting a silicone or hydrocarbon having an alkenyl group at both ends thereof with a hydrosilyl group-containing organosilicone resin, is soluble with a liquid oil at room temperature, and forms a film by volatilization of the oil. Also described herein is a method for preparing a crosslinked organosilicone resin and cosmetics containing a crosslinked organosilicone resin.

Crosslinked organosilicon resin, a method for producing same, and a cosmetic

A cosmetic including at least one cyclic silicone represented by formula (1), and having a boiling point of 205 to 255&#xb0; C. and a viscosity of less than 5 mm/s (25&#xb0; C.). This cosmetic has a light touch, a good spread, and excellent water repellency, forms a uniform cosmetic film, can achieve a feeling of use without a strong oily feeling, and has stability over time and cosmetic persistence when a variety of oil such as a silicone, hydrocarbon oil, and ester, an organic ultraviolet absorber, or an oily component being solid at 25&#xb0; C. is mixed. 

Cosmetic

This organic group-modified organosilicon resin is represented by the average composition formula (1).(RSiO)(RSiO)(RSiO)(RSiO)(RSiO)(SiO)&#x2003;&#x2003;(1)[a, b, c, d, e and f are numbers that satisfy 0&#x2264;a&#x2264;400, 0&#x3c;b&#x2264;200, 0&#x2264;c&#x2264;400, 0&#x2264;d&#x2264;320, 0&#x2264;e&#x2264;320, 0&#x3c;f&#x2264;1,000, and 0.5&#x2264;(a+b+c)/f&#x2264;1.5.] Because this organic group-modified organosilicon resin can form films softer than those formed with trimethylene siloxysilicate, the cosmetic obtained by blending with said silicon resin feels good when used, has good cosmetic holding properties, spreads easily and has an excellent finish, easy removal, and superior scratch resistance.

Organic group-modified organosilicon resin, production method thereof, and cosmetic

A non-rinse-off hair protective cosmetic including a polyoxyalkylene-modified organopolysiloxane compound which has: a terminal to which a siloxane chain having a polyoxyalkylene group shown by a formula (1) is bonded; 50 or more structural units shown by a formula (2) per molecule; a viscosity of 50,000 mPa&#xb7;s or more at 25&#xb0; C.; and an HLB of 1 to 7, where each Rrepresents an alkyl group or a phenyl group; A represents a monovalent group having a polyoxyalkylene group shown by a formula (3) or (4). Thus, a non-rinse-off hair protective cosmetic excellent in hair protection performance, resistant to water, but easily removable with a shampoo or the like after use. 

Non-rinse-off hair protective cosmetic

The present invention provides a bicontinuous microemulsion composition, including: (A) polyglycerin group-containing organo(poly)siloxane shown by the general formula (1): wherein Rrepresents an alkyl group or a phenyl group, Rrepresents a group having a polyglycerin structure shown by the formula (2) or the formula (3), Rrepresents Ror R, 'a' is 0 to 6, 'b' is 0 to 4, a+b is 0 to 10, and at least one of Ris Rwhen &#x201c;b&#x201d; is 0: wherein Rrepresents an alkylene group or an aralkylene group, &#x201c;c&#x201d; is 0 to 10, and &#x201c;d&#x201d; is 2 to 6; (B) silicone oil having a viscosity of 20 mm/s or less at 25&#xb0; C., volatile hydrocarbon oil, or ester oil; and (C) water. This provide a transparent bicontinuous microemulsion composition in which anionic or cationic surfactant, and water-soluble monovalent or polyvalent alcohol are unnecessary; and a cosmetic with excellent pleasantness of use.

Bicontinuous microemulsion composition and cosmetic

A production method for an organopolysiloxane emulsion composition, wherein (I) an emulsion composition is prepared from an organopolysiloxane (A) that is represented by formula (1) and that has an octamethylcyclotetrasiloxane content of 1,000 ppm or lessHO(RSiO)H&#x2003;&#x2003;(1),(wherein Ris H or a monovalent hydrocarbon group and n is a number that makes the viscosity, at 25&#xb0; C., of the organopolysiloxane 200 mm/s or more but less than 2,000 mm/s), a surfactant (B) that is represented by formula (2) and that has an alkyl naphthalene skeletonR&#x2014;CH&#x2014;SOM&#x2003;&#x2003;(2),(wherein Ris an alkyl group, M is H, an alkali metal ion, an alkali earth metal ion, NH, or a tertiary NH, and m is 1-3), and water (C-1), and wherein (II) water (C-2) is added as necessary and then emulsion polymerization is performed in the presence of an acid catalyst (D).

Production method for organopolysiloxane emulsion composition

An organic group-modified organosilicon resin having the average compositional formula (1), which is solid or liquid at 25&#xb0; C., is suited for use in cosmetics. The resin is able to form an emulsion having a pleasant feel on use, a high internal water phase, and stability over time. In formula (1), a, b, c, d, e, and f are numbers: 0&#x2264;a&#x2264;400, 0&#x3c;b&#x2264;200, 0&#x2264;c&#x2264;400, 0&#x2264;d&#x2264;320, 0&#x2264;e&#x2264;320, 0&#x3c;f&#x2264;1,000, and 0.5&#x2264;(a+b+c)/f&#x2264;1.5.(RSiO)(RSiO)(RSiO)(RSiO)(RSiO)(SiO)&#x2003;&#x2003;(1)

Organic group-modified organosilicon resin, making method, and cosmetics

A method for producing a hydrosilyl group-containing organic silicon resin of formula (6) in a solid form, wherein after formulae (1) to (3) are hydrolyzed in the presence of an acid catalyst, hydrolysis is carried out by adding hydrosilyl group-containing organic silicon compounds of formulae (4) and (5), followed by neutralization by a base catalyst with the amount thereof being more than a molar equivalent of the acid catalyst, and then by condensation. By so doing, deactivation amount of the hydrosilyl group can be reduced, so that the method for producing the hydrosilyl group-containing organic silicon resin, which is in a solid form without a solvent and to which a hydrosilyl group can be introduced quantitatively and in a large quantity, is provided,RSiOSiR&#x2003;&#x2003;(1)RSiX&#x2003;&#x2003;(2)SiX&#x2003;&#x2003;(3)HRSiOSiRH&#x2003;&#x2003;(4)HRSiX&#x2003;&#x2003;(5)(RSiO)(HRSiO)(SiO)(RSiO)&#x2003;&#x2003;(6).

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Annaka, Japan

Takuya Abe