Shin-etsu Chemical Co., Ltd.

Shunji Aoki

Akihiro Kobayashi

Yuko Takada

Yuta Hamajima

Akira Yamamoto

Shinji Irifune

Toshio Ohba

Masahiko Ogawa

Yasuaki Hara

Kenji Tanaka

Yasuyoshi Kuroda

Motohiko Hirai

Takato Sakurai

Chinami Matsui

Tsuneo Kimura

Takafumi Sakamoto

Kunio Itoh

Motoo Fukushima

Yoshinori Inokuchi

Kenji Yamamoto

Munenao Hirokami

Ichiro Ono

Naoki Omura

Toshiaki Ihara

Tetsuro Yamada

Yuji Ando

Masatoshi Miyake

Ken Nakayama

Kiyoyuki Mutoh

Takumi Fukamachi

Takahito Oki

The present invention provides: porous spherical silicone rubber particles which have high light scattering performance; porous silicone composite particles; and a method for producing these particles. The porous spherical silicone rubber particles have pores inside the particles or in the surfaces of the particles.

Porous spherical silicone rubber particles, porous silicone composite particles, and method for producing these particles

Provided is a method for preparing a (meth)acryloyl group-containing organopolysiloxane having a step of transesterification between the components (a1) and (a2) in the presence of the components (a3) and (a4) to obtain the (meth)acryloyl group-containing organopolysiloxane, wherein component (a1) is an organopolysiloxane represented by the average composition formula (1) which has a hydroxy group-containing group, component (a2) is a (meth)acrylic acid ester represented by the general formula (2), component (a3) is a zirconium metal complex in an amount such that a molar ratio of component (a3) to the hydroxy group of component (a1) is 0.001 to 0.1, and component (a4) is a hydroxy group-containing amine represented by HON(R)in an amount such that a molar ratio of component (a4) to component (a3) is 0.10 to 1.5, wherein Ris, independently of each other, a linear or branched aliphatic hydrocarbon group having 1 to 6 carbon atoms.

Method for preparing a radical-polymerizable organopolysiloxane, a radiation-curable organopolysiloxane composition, and a release sheet

Provided is a composition that imparts an excellent flexibility to post-treatment fibers and textiles, provides a water-absorptive fiber surface and provides an excellent durability, and can maintain the water absorbency of the fiber surface even after a laundry treatment. Also provided is a fiber treatment agent that contains said composition as an effective component. The composition contains the following component (A) and component (B) wherein the content ratio on a mass basis represented by component (A)/[component (A)+component (B)] is 0.01-1. Component (A) is an organopolysiloxane represented by general formula (1) or a silane represented by general formula (2), and component (B) is water.

Composition, fiber treatment agent, fiber treatment method, and treated fiber

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

Provided are: a removable radiation-curable silicone composition which has excellent radiation curability and gives cured objects having excellent adhesiveness to the substrates; and a release sheet. The removable radiation-curable silicone composition comprises the following components (A), (B), (C), and (D): (A) 100 parts by mass of an organopolysiloxane having an alkenyl group; (B) 1-30 parts by mass of an organopolysiloxane having a mercaptoalkyl group; (C) 0.1-5 parts by mass of a compound having a plurality of acryl groups in the molecule; and (D) 0.1-15 parts by mass of a radical polymerization initiator.

Removable radiation-curable silicone composition and release sheet

This gel-form composition contains (A) an organoalkoxysilane of the following formula and/or a partially hydrolyzed condensate of the organoalkoxysilane, RSi(OR)(Rand Rare monovalent hydrocarbon groups, and a is 1, 2, or 3), (B) an aluminum dicarboxylate of the following formula (RCOO)Al(OH) (Ris a monovalent hydrocarbon group), (C) a C6-24 fatty acid, (D) a C6-30 dicarboxylic acid, and (E) an aluminum oligomer and/or aluminum alkoxide selected from aluminum oxide organoxides and aluminum oxide acylates. It is thereby possible to: obtain a water absorption inhibitor that imparts an excellent water absorption-inhibiting property to the surfaces of porous materials; and provide a method for imparting a water absorption-inhibiting property by applying the water absorption inhibitor to the surface of a porous material, and a porous material that is surface-treated by the water absorption inhibitor.

Gel-form composition and water absorption inhibitor

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

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.)

Organopolysiloxane emulsion composition and resin 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.

Production method for organopolysiloxane emulsion composition

Provided is a silicone composition having high curability even under low-temperature treatment conditions, and exceptional storage stability, the silicone composition being capable of imparting excellent flexibility to fibers as a fiber treatment agent, and also having exceptional washing durability; specifically, a silicone composition containing (A) 70-98 parts by mass of organopolysiloxane having a group represented by formula (1) at the end of the molecule or in a side chain (in the formula, Ris a C1-8 divalent hydrocarbon group, a is an integer of 0-4, Rare each independently a hydrogen atom, C1-10 monovalent hydrocarbon group, or acyl group, and at least one group shown by Ris hydrogen) and (B) 2-30 parts by mass of blocked polyisocyanate having two or more isocyanate groups per molecule, 50% or more of these isocyanate groups being blocked by a thermally dissociable blocking agent.

Silicone composition, silicone emulsion composition, and fiber treatment agent

To provide a radiation-curable silicone composition which provides a cured product whose odor is decreased, particularly is odorless, and has excellent curability and releasing properties. A radiation-curable silicone composition including the following components (A) and (B): (A) an epoxy group-containing cation-polymerizable organopolysiloxane which is represented by the following average composition formula (1): RRSiO(1) and (B) an iodonium salt having a cation moiety represented by the following general formula (2) in an effective amount to cure said component (A), [(R)&#x2014;I&#x2014;(R)](2) wherein Ris, independently of each other, a substituted or unsubstituted monovalent aromatic hydrocarbon group having 15 to 26 carbon atoms, wherein said component (A) may be accompanied by any other compounds volatilizing during heating at 105 degrees C. for 3 hours, a content of said compounds is at most 2.0 mass %, based on a total amount of component (A) and said compound.

Radiation-curable silicone composition

A blocked polyisocyanate-containing curable silicone composition includes an amino group-containing organopolysiloxane, a blocked polyisocyanate and a catalyst which is an organic base compound and/or a metal compound. The composition has a high curability even under low-temperature conditions and, when used as a textile treatment, imparts textile fibers and products with good softness and water absorbency, and also has an excellent durability to washing.

Blocked polyisocyanate-containing curable silicone composition and textile treatment using the same

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

Shunji Aoki