Shin-etsu Chemical Co., Ltd.

Shin-etsu Chemical C O., Ltd.

Yuko Takada

Shunji Aoki

Akihiro Kobayashi

Yuji Ando

Takuya Abe

Hanako Tawata

Saori Ubukata

Provided is a method for preparing an oil-in-water type emulsion composition, the method comprising a step for stirring and emulsifying a composition containing components (A), (B), (C) and (D) below and then treating under a high shear pressure of 30-300 Mpa, wherein (A) is 5-35 mass % of an acrylic-silicone graft copolymer, (B) is 5-35 mass % of volatile oil, (C) is 2-15 mass % of polyoxyethylene sorbitan fatty acid ester having average addition mole number of ethylene oxide (EO) of 10 or more and HLB of 11 or more, and (D) is 15-88 mass % of water.

Method for preparing oil-in-water type emulsion composition, and cosmetic material

By incorporating a polyoxyalkylene-modified organo(poly)siloxane compound having a specific structure as an emulsifier or emulsification aid, an organopolysiloxane having a high degree of polymerization can be easily emulsified. The obtained organpolysiloxane emulsion composition has excellent resistance to polar solvents including DMF and is dispersible in water. When incorporated into a resin composition of either the solvent-based type including an organic solvent or the water-based type, the emulsion composition can hence impart slipperiness, wear resistance, and glossiness without causing cissing or blushing.

Organopolysiloxane emulsion composition and resin composition

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 organopolysiloxane emulsion composition which contains a polyoxyalkylene-modified organopolysiloxane compound represented by formula (1) as an emulsifying agent or as an emulsifying assistant.(LRSiO)(RSiO)(RSiO)(RSiO)(SiO)&#x2003;&#x2003;(1)(In the formula, L represents a polyoxyalkylene group represented by formula (2); R represents a hydrogen atom, a hydroxy group, an alkyl group, an aryl group, an aralkyl group or an alkoxy group; a represents a number of 2-4; b represents a number of 0-2; c represents a number of 50-1,000; and each of d and e represents 0 or 1.)&#x2014;HC&#x2014;CH&#x2014;(CH)&#x2014;O-(EO)-(AO)&#x2014;R&#x2003;&#x2003;(2)(In formula (2), EO represents an oxyethylene group; AO represents a linear or branched oxyalkylene group having 3-10 carbon atoms; Rrepresents an alkyl group, a hydrogen atom, a carboxy group, an acyl group or a phenyl group; r represents a number of 0-10; s represents a number of 1-100, t represents a number of 0-150; and (s+t) represents a number of 15 or more.)

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

A production method for an organopolysiloxane emulsion composition, wherein (I) an emulsion composition is prepared by emulsifying an organopolysiloxane (A) that is represented by formula (2), or that is a mixture of organopolysiloxanes represented by formulas (1) and (2), and that has an octamethylcyclotetrasiloxane content of 1000 ppm or less  The organopolysiloxane generated has a 15 mass % toluene solution viscosity of 200 mPa&#xb7;s or higher at 25&#xb0; C., has an octamethylcyclotetrasiloxane content of 3000 ppm or less, and has a branched structure that has a particle size of 1 &#x3bc;m or less.

An organopolysiloxane emulsion composition having good age stability is prepared by (I) emulsifying a mixture comprising (A) an organopolysiloxane of formula: HO(RSiO)H, (B) a surfactant and (C-1) water to form a first emulsion composition and (II) effecting emulsion polymerization of the first emulsion composition in the presence of (D) an acid catalyst below 40&#xb0; C. The target emulsion composition contains an organopolysiloxane product having a viscosity&#x2267;300,000 mPa&#xb7;s at 25&#xb0; C. and an octamethylcyclotetrasiloxane content&#x2266;3,000 ppm, and has an emulsified particle size&#x2266;500 nm.

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Annaka, Japan

Yuko Takada