Shin-etsu Chemical Co., Ltd.

The Procter Gamble Company

Shin-etsu Chemical C O., Ltd.

Akihiro Kobayashi

Shunji Aoki

Takato Sakurai

Yuko Takada

Rajan Keshav Panandiker

Bernard William Kluesener

Sherri Lynn Randall

Rebecca Ann Langevin

Hiroyuki Moriya

Chinami Matsui

Yuji Ando

Takuya Abe

A silicone emulsion composition capable of being formed into a coating film, which contains: (A) 100 parts by mass of an organopolysiloxane containing, per molecule, at least two groups each capable of binding to a silicon atom, wherein the at least two groups are independently selected from a hydroxyl group and an alkoxy group; (B) 0.1 to 50 parts by mass of a surfactant; (C) 0.01 to 10 parts by mass of at least one substance selected from cellulose and a cellulose derivative; (D) 0.5 to 50 parts by mass of colloidal silica; and (E) 50 to 1,000 parts by mass of water.

Silicone emulsion composition capable of being formed into coating film, and coating film

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

The present invention relates to a defoamer oil compound that contains an organopolysiloxane (A), a fine silica powder (B), and a group (C) that is represented by the organopolysiloxanes of formulas (I) and/or (II) (in the formulas, c, d, and e are each an integer of 0 or more, and at least one of Xto Xis the group represented by formula (i)). The component (C) is used as a surface treatment agent for the component (B). The present invention makes it possible to obtain a silicone-based defoamer composition that imparts good initial defoaming properties even in an alkaline foaming liquid, that exhibits very little loss in performance over time, and that has excellent defoaming performance.

Defoamer oil compound, production method therefor, and defoamer 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

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.

Method for preparing organopolysiloxane emulsion composition

The present application relates to anti-foam compositions and methods of making and using such compositions as well as consumer products that comprise such compositions and the use of same. Such anti-foam compositions have low viscosities yet are effective antifoamers.

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Annaka, Japan

Akihiro Kobayashi