Shin-etsu Chemical Co., Ltd.

Yuji Ando

Hiroomi Iyoku

Shunji Aoki

Shinji Irifune

Motohiko Hirai

Akihiro Kobayashi

Yuko Takada

A silicone resin represented by formula (1) and having a Mw of 1,000-8,000 is useful in cosmetics.[(CH)SiO][RSiO][RSiO][RSiO][SiO]&#x2003;&#x2003;(1)Ris a C-Calkyl group, C-Caryl group (exclusive of phenyl) or C-Cfluorinated alkyl group, Rand Rare each independently a C-Calkyl group, C-Caryl group or C-Cfluorinated alkyl group, a=0-0.2, b=0.1-0.5, c=0-0.2, d=0.01-0.5, e=0-0.6, a+b+c+d+e=1.0, at least one phenyl group is included in the molecule. A film of the silicone resin has a refractive index of at least 1.48.

Silicone resin, making method, and cosmetics

The present invention aims to provide an emulsion composition of an organopolysiloxane which has enhanced stability in a water-soluble solvent. The invention provides an organosilicone emulsion composition comprising

Organosilicone emulsion composition

Provided is a method for producing an organopolysiloxane emulsion composition which contains an organopolysiloxane having a trialkyl group at a terminal thereof and having a viscosity of 50,000 mm/s or more at 25&#xb0; C., within a shorter time compared with the conventional methods. A method for producing an emulsion composition which contains an organopolysiloxane having a viscosity of 50,000 mm/s or more at 25&#xb0; C. and capped with a trialkylsilyl group, said method comprising: (I) emulsifying a mixture comprising (A) an organopolysiloxane, (B) a nonionic surfactant, (C) an anionic surfactant, (D-1) an acidic compound and (E-1) water to prepare an emulsion composition; (II) adding (D-2) an acidic compound and (E-2) water to the emulsion composition to perform emulsion polymerization; and (III) adding 0.001 part by mass or more of (F) a compound to the resultant product to perform emulsion polymerization again.

Method for producing organopolysiloxane emulsion composition, and emulsion composition

One of the purposes of the present invention is to provide an aminoalkyl group-containing siloxane, in particular an aminoalkyl group- and polyoxyalkylene group-containing siloxane, in which an amount of a cyclic siloxane as an impurity contained is decreased, and a method for preparing the same. The present invention is to provide a method for preparing an aminoalkyl group-containing siloxane represented by the following general formula (1): (RSiO)(RSiO)(RSiO)(SiO)(1), wherein Ris, independently of each other, a hydroxyl group, an alkoxyl group, a substituted or unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms, or a group represented by the following formula (2), (3) or (6); &#x2014;(CRH)&#x2014;(NHCHCH)&#x2014;NH(2), &#x2014;(CRH)&#x2014;O&#x2014;(CHO)&#x2014;(CHO)&#x2014;R(3), &#x2014;(CRH)&#x2014;(RSiO)&#x2014;SiR(6); provided that at least one of Ris the group represented by the formula (2); comprising a step of addition reacting (A) a hydrogensiloxane represented by the following general formula (9): (RSiO)(RSiO)(RSiO)(SiO)(9) with (B) a compound represented by the following formula (10) and having a protected amino group: CHR&#x2550;CR&#x2014;(CRH)&#x2014;(NQCHCH)&#x2014;NQ(10) and optionally (C) a polyether represented by the following formula (11): CHR&#x2550;CR&#x2014;(CRH)&#x2014;O&#x2014;(CHO)&#x2014;(CHO)&#x2014;R(11) and (D) a (poly)siloxane represented by the following formula (12): CHR&#x2550;CR&#x2014;(CRH)&#x2014;(RSiO)&#x2014;SiR(12); and a step of removing the silyl group from the amino group, hereinafter referred to as deprotection, to thereby provide said aminoalkyl group-containing siloxane represented by the formula (1).

Aminoalkyl group-containing siloxane and a method for preparing the same

One of the purposes of the present invention is to provide a polyether-modified siloxane having a good thickening property, in particular a good thickening property for an aqueous liquid. The present invention provides a polyether-modified siloxane represented by the following general formula (1):Sx-(CH)COO&#x2014;(CHO)&#x2014;(CHO)&#x2014;CO(CH)-Sx&#x2003;&#x2003; (1) 

Polyether-modified siloxane and a thickening agent

One of the purposes of the present invention is to provide an emulsion composition which has a small initial diameter and good stability with time and dilution stability. Further, another purpose of the present invention is to provide an emulsion composition which has high adsorption ability to fibers and provides a hydrophilic surface of the fibers. Thus, the present invention is an emulsion composition comprising water and an aminoalkyl group and polyoxyalkylene group-containing siloxane represented by the following general formula (1): (RSiO)(RSiO)(RSiO)(SiO)(1) wherein Ris, independently of each other, a hydroxyl group, an alkoxyl group, a substituted or unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms, or a group represented by the following formula (2), (3) or (6): &#x2014;(CRH)&#x2014;(NHCHCH)&#x2014;NH(2), &#x2014;(CRH)&#x2014;O&#x2014;(CHO)&#x2014;(CHO)&#x2014;R(3), &#x2014;(CRH)&#x2014;(RSiO)&#x2014;SiR(6); provided that at least one of Ris the group represented by the formula (2) and at least one of Ris a group represented by the formula (3).

Emulsion composition comprising an aminoalkyl group- and polyoxyalkylene group-containing siloxane

Provided is a cosmetic preparation superior in stability and feel. The cosmetic preparation contains an (a) organopolysiloxane emulsion in an amount of not smaller than 0.1% by mass. This organopolysiloxane emulsion is obtained through emulsion polymerization and contains octamethylcyclotetrasiloxane in an amount of not larger than 1,000 ppm by mass.

Cosmetic preparation

An organopolysiloxane emulsion composition produced by the emulsion polymerization of an emulsion that comprises (A) an organopolysiloxane containing a silanol group or an organooxy group, (B) a nonionic surfactant represented by formula (2): RO(EO)(PO)R(wherein Rrepresents an alkyl group or R(CO)&#x2014;; Rrepresents an alkyl group; Rrepresents an alkyl group or R(CO)&#x2014;; Rrepresents an alkyl group; EO represents an ethylene oxide group; PO represents an alkylene oxide group; and a and b independently represent 0 to 100, wherein a+b&#x3e;0 and the sequence of EO and PO may be random or in the form of a block) and (C) a surfactant other than the component (B), and may additionally comprise (D) a polymerization catalyst and (E) water if required. According to the present invention, it becomes possible to produce an extremely stable organopolysiloxane emulsion composition without inhibiting polymerization during the emulsion polymerization of an organopolysiloxane having condensation reactivity. Further, it also becomes possible to reduce the amount of octamethylcyclotetrasiloxane produced during the emulsion polymerization.

Organopolysiloxane emulsion composition

A method for producing an organopolysiloxane emulsion composition, which enables the organopolysiloxane to be formed with a high viscosity in a short period of time, and suppresses the amount of octamethylcyclotetrasiloxane (D4) to not more than 3,000 ppm. Specifically, a method for producing an organopolysiloxane emulsion which includes emulsifying a mixture containing an organopolysiloxane represented by formula: HO(RSiO)H and having a D4 content of not more than 1,000 ppm, a nonionic surfactant, an anionic surfactant, and water, and subjecting the obtained emulsion composition to emulsion polymerization, thus preparing the emulsion composition.

Method for producing organopolysiloxane emulsion composition

A silicone microemulsion composition obtained by microemulsifying a carboxy-modified organopolysiloxane, and having a lower surface tension than conventional microemulsions. The composition includes 100 parts by mass of a specific carboxy-modified organopolysiloxane (A), 25 to 75 parts by mass of a specific polyether-modified organopolysiloxane (B), 0.1 to 10 parts by mass of an anionic surfactant, and 20 to 6,000 parts by mass of water, wherein the average particle size of the emulsion particles is not more than 100 nm.

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Annaka, Japan

Yuji Ando