Abstract: A process for removing metallic impurities from halogenated silicon compounds, such as chlorosilane monomers and/or chlorinated polysilanes is disclosed. The process involves treating a halogenated silicon compound with a tertiary amine and thereafter a suitable grade of activated carbon.

Abstract: A cationic surfactant is disclosed. The cationic surfactant has the general formula [Z-D-N(-D1-NR13+)a(R)2-a][X?]a where Z is a siloxane moiety or an unsubstituted hydrocarbyl moiety having from 5 to 20 carbon atoms, D is a covalent bond or a divalent linking group, D1 is a divalent linking group, R is H or an unsubstituted hydrocarbyl group having from 1 to 4 carbon atoms, each R1 is an independently selected unsubstituted hydrocarbyl group having from 1 to 4 carbon atoms, subscript a is 1 or 2, and each X is an anion. A method of preparing the cationic surfactant is also disclosed.

Abstract: There is provided an adhesion mediator composition for use in the adhesion of silicone elastomers made from hydrosilylation curable silicone rubber compositions to thermoplastic substrates, especially polyolefin substrates. There is also provided a process for adhering silicone elastomers to thermoplastic substrates using the adhesion mediator composition. The adhesion mediator composition comprises: (i) a trialkoxysilane; (ii) a platinum group metal based hydrosilylation reaction catalyst; (iii) an alkoxy titanium compound; (iv) a tetraalkoxysilane; and (v): either (a?) a polyorganosiloxane containing at least two unsaturated groups; or (b?) a mixture of two or more polyorganosiloxanes containing at least two unsaturated groups.

Abstract: Addition curing electrically conductive liquid silicone rubber (LSR) compositions, their methods of preparation, and cured elastomeric products made from the compositions are provided. The compositions are cured to form elastomeric products suitable for high voltage applications such as cable joints, cable terminal applications, cable accessories and connectors. In general, the composition comprises: (a) at least one polydiorganosiloxane having at least two alkenyl groups per molecule: (b) at least one organohydrogenpolysiloxane: (c) at least one reinforcing filler: (d) at least one hydrosilylation catalyst: and (e) an electrically conductive filler. Component (e) comprises: (i) extra conductive carbon black: and (ii) single walled carbon nanotubes.

Abstract: A thermal interface material is provided. The thermal interface material comprises: (A) a polyolefin having at least two hydroxy groups per molecule; (B) at least one thermally conductive filler; (C) a phase change material with a melting point of 25 to 150° C.; and (D) a coupling agent. A content of component (B) is at least 80 mass %, a content of component (C) is 0.01 to 1 mass %, and a content of component (D) is 0.1 to 1 mass %, each based on a total mass of the thermal interface material. The thermal interface material becomes softer as its temperature increases. Meanwhile, the thermal interface material generally does not exhibit pumping-out in electronic devices during power cycling.

Abstract: A polyfunctional organohydrogensiloxane and method for its preparation using a boron containing Lewis acid as catalyst is disclosed. A clustered functional organosiloxane may be prepared by a method comprising functionalizing the polyfunctional organohydrogensiloxane. The polyfunctional organohydrogensiloxane and the clustered functional organosiloxane are useful in curable compositions. The polyfunctional organohydrogensiloxane may be used in a release coating composition. The clustered functional organosiloxane may be used in an adhesive composition.

Abstract: A composition and a method for preparing a polymer composite article. The composition comprises (A) a filler in an amount of from 10 to 90 wt. The composition also comprises (B) a polymer in an amount of from 10 to 90 wt. %, wherein the (B) polymer is selected from polyolefins, polyamides, polyesters, or combinations thereof. Further, the composition comprises (C) an organopolysiloxane in an amount of from greater than 0 to 10 wt. %; the (C) organopolysiloxane having at least one silicon-bonded hydroxyl group and a viscosity of from 1,000 to 60,000 mPa·s at 25° C. The ranges for components (A)-(C) are based on the total weight of components (A), (B) and (C) in the composition.

Abstract: A method for making a solventless polyorganosiloxane pellet is disclosed. The pellet is comprised of a polyorganosilicate resin and a polyorganosiloxane gum. The pellet is useful for making silicone pressure sensitive adhesive compositions.

Abstract: A curable silicone composition is disclosed. The curable silicone composition comprises: (A) a linear organopolysiloxane having at least two alkenyl groups and at least one aryl group in a molecule; (B) a branched organopolysiloxane represented by the average unit formula; (C) an organosiloxane having at least two silicon atom-bonded hydrogen atoms in a molecule; and (D) a hydrosilylation reaction catalyst. The curable silicone composition forms a cured product having good mechanical properties and good retention of transparency under conditions of high temperature.

Abstract: A method of preparing an alkoxy-functional organosilicon compound is provided. The method comprises reacting (A) an initial organosilicon compound and (B) an alcohol component in the presence of (C) a catalyst, thereby preparing the alkoxy-functional organosilicon compound. The initial organosilicon compound (A) comprises at least one alkoxysilyl group. The alcohol component (B) comprises an organic alcohol. The catalyst (C) comprises (C1) an ammonium carboxylate compound or (C2) a titanate compound. A reaction product comprising an alkoxy-functional organosilicon compound prepared in accordance with the method, and a composition comprising the reaction product, are also provided. The alkoxy-functional organosilicon compound, and the reaction product and composition comprising the same, are prepared in increased purity under functional group-tolerant conditions.

Abstract: A silicone pressure sensitive adhesive composition contains an alkenyl-functional polydiorganosiloxane gum, a polyorganosilicate resin, a polyorganohydrogensiloxane crosslinker, a migration reducing additive, a hydrosilylation reaction catalyst, a hydrosilylation reaction inhibitor, and a solvent. Methods for preparing the silicone pressure sensitive adhesive composition and using it to form a protective film are provided.

Abstract: A polydiorganosiloxane is useful in a composition and a method for preparing a wood plastic composite article. The wood plastic composite article is useful as a building material. The polydiorganosiloxane may be added to the composition in liquid form or may form part of a solid carrier component used to make the wood plastic composite article.

Abstract: A highly thermally conductive composition is provided, such composition comprising: (A) An organopolysiloxane composition; (B) a filler treating agent; (C) a thermal stabilizer; and (D) thermally conductive filler mixture, comprising: (D-1) a small-particulate thermally conductive filler having a mean size of up to 3 ?m, (D-2) spherical aluminum nitride having a mean size of from 50 to 150 ?m, (D-3) boron nitride having a mean size of from 20 to 200 ?m.

Abstract: A method for producing a thixotropic curable silicone composition is provided. The curable silicone composition comprises: (A) a silicone base material comprising: an organopolysiloxane having at least two alkoxysilyl-containing groups per molecule and a filler other than fumed silica; (B) a hydrophobic fumed silica; (C) a carbasilatrane derivative; (D) an alkoxysilane or its partial hydrolysis and condensation product; and (E) a condensation reaction catalyst. The method comprises the following steps: (I) mixing components (A) and (B); (II) mixing component (C) with a mixture obtained by step (I); and (III) mixing components (D) and (E) with a mixture obtained by step (II) under free of moisture. The curable silicone composition obtained by the method has an excellent thixotropic property and can cure at room temperature by contact with moisture in air.

Abstract: A silicon glycan is provided. The silicon glycan comprises a glycoside moiety, independently selected organosilicon moieties, and beta-amino alcohol moieties joining the organosilicon moieties to the glycoside moiety. The glycoside moiety comprises independently selected saccharide moieties, which may be substituted with hydrocarbyl groups, ether moieties, and/or amine moieties. A method of preparing the silicon glycan is also provided. The method includes reacting (A) an aminoethyl polysaccharide and (B) an epoxide-functional organosilicon compound, to give the silicon glycan. The method may include preparing the aminoethyl polysaccharide (A) by first reacting (At) a hydroxyl-functional polysaccharide and (A2) an aziridinium halide compound to give the aminoethyl polysaccharide (A).

Abstract: A curable coating composition is provided having multi-functionalized acrylic copolymer and amino-functional silicone resin curing agents. The acrylic copolymer of the curable coating composition has, in polymerized form, epoxy functionalized groups and cure compatibility groups. The coating compositions are useful in the field of superior weatherable and durable coatings and are useful to replace isocyanate-containing polyurethane based coatings. Also provided are coated articles produced from the curable composition.

Abstract: A composition comprises: a branched organosilicon compound; an acrylate-functional compound other than the branched organosilicon compound; and optionally a carrier vehicle. The branched organosilicon compound has the following general formula (I): (R1)3Si—X (I); where X comprises a acryloxy-functional moiety, and each R1 is selected from —OSi(R4)3 and R, with the proviso that at least one R1 is —OSi(R4)3; where each R is a substituted or unsubstituted hydrocarbyl group; where each R4 is selected from R, —OSi(R5)3, and —[OSiR2]mOSiR3; where each R5 is selected from R, —OSi(R6)3, and —[OSiR2]mOSiR3; where each R6 is selected from R and —[OSiR2]mOSiR3; with the proviso that at least one of R4, R5 and R6 is —[OSiR2]mOSiR3; and where 0?m?100. A method of preparing a copolymer is further provided.

Abstract: Provided are an assembly and process for the continuous or semi-continuous preparation of addition-crosslinking liquid silicone rubbers and to liquid silicone rubber compositions made therefrom. Also disclosed are articles made from the liquid silicone rubber compositions.

Abstract: A polydiorganosiloxane is useful in a composition and a method for preparing a wood plastic composite article. The wood plastic composite article is useful as a building material. The polydiorganosiloxane may be added to the composition in liquid form or may form part of a solid carrier component used to make the wood plastic composite article.

Abstract: A composition contains: (a) a first organopolysiloxane with an average of 2 or more mercaptoalkyl groups per molecule and that is free of alkenyl functionality; (b) a second organopolysiloxane with an average of one or more alkenyl group and one or more alkoxy group per molecule; (c) a tetraalkoxy silane; (d) an ultraviolet light photoinitiator; and (E) a condensation catalyst; where the concentration of the first and second organopolysiloxanes are such that the molar ratio of mercaptoalkyl groups to alkenyl groups is in a range of 0.4 to 3.0.