Abstract: A cyclic carbonate-modified silane or siloxane is combined with a non-aqueous solvent and an electrolyte salt to form a non-aqueous electrolytic solution, which is used to construct a secondary battery having improved temperature and high-output characteristics.

Abstract: A method for detecting an analyze that may be present in ambient air, bound to a surface or as part of complex aqueous media that includes providing a metallole-containing polymer or copolymer, exposing the polymer or copolymer to a suspected analyze or a system suspected of including the analyze, and measuring a quenching of photoluminescence of the metallole-containing polymer or copolymer exposed to the system. Also included is a solid state inorganic-organic polymer sensor for detecting nitroaromatic compounds that includes a substrate and a thin film of a metallole-containing polymer or copolymer deposited on said substrate.

Abstract: The present invention provides a novel photocurable composition containing an organic polymer having an epoxy group and/or oxetane group-containing silicon group at an end and a cationic photoinitiator. For example, the photocurable composition contains an organic polymer (A) having an epoxy group and/or oxetane group-containing silicon group at an end, and a cationic photoinitiator (B), the organic polymer (A) being produced by addition reaction between an organic polymer terminated with an unsaturated group and a hydrosilane compound having an epoxy group and/or an oxetane group.

Abstract: An extremely durable, stable and fast-curing elastomeric composition suitable for coating all types of architectural glass is disclosed.

Abstract: The invention concerns the use as additive for improving properties of resistance to arc tracking and arc erosion: of a mixture A, B or C formed by: concerning mixture A: A1: platinum; and A2: at least an inorganic compound A2.1 of a metal with several degrees of oxidation selected from the group formed by V, Cr, Mn, Fe, Co, Ni, and Cu, in which the metal atom is at a degree of oxidation higher than zero, the least possible (abbreviation: DOX mini); or A3: a combination of at least an inorganic compound A2.1 with at least an inorganic compound A2.2 in which the atom of V, Cr, Mn, Fe, Co, Ni or Cu is at a degree of oxidation higher than DOX mini; concerning mixture B: B1 platinum; and B2: at least an inorganic compound B2.1 of cerium-IV or of lanthanum-III; or B3: a combination of at least an inorganic compound B2.1 with at least an inorganic compound B2.

Abstract: A curable organopolysiloxane composition comprising (A) a linear organopolysiloxane having at least two alkenyl groups and at least one aryl group per molecule, (B) a branched organopolysiloxane having at least one alkenyl group and at least one aryl group per molecule, and having siloxane units represented by the general formula: RsiO2/3, (C) a linear organopolysiloxane with both terminal ends of the molecular chain blocked by silicon bonded hydrogen atoms having at least one aryl group per molecule, and (D) a hydrosilation reaction catalyst, and a semiconductor device whose semiconductor elements are coated with the cured product of the above-described composition. The curable organopolysiloxane composition shows low viscosity, excellent filling properties, and excellent curability that cures to form a soft cured product of a large refractive index, high light transmittance, and high adhesion to substrates, as well as the semiconductor device shows superior reliability.

Abstract: Silicone based liquid crystal and vesicles are prepared by first reacting (A) an ?Si—H containing polysiloxane, (B) a mono-alkenyl polyether, in the presence of a platinum catalyst until an ?Si—H containing polysiloxane with polyether groups (C) is formed. The ?Si—H containing polysiloxane with polyether groups (C) is then reacted with (D) an unsaturated hydrocarbon such as an ?,?-dienes, and (E) water, in the presence of a platinum catalyst until the silicone based liquid crystal or vesicle is formed. The silicone based liquid crystal or vesicle can also be heated until a hard liquid crystal gel or vesicle paste are formed.

Abstract: This invention relates to a composition that can be cured to form an adhesive. The adhesive is useful in the electronics industry. The composition is prepared by mixing components including: (I) a polyorganosiloxane having an average of at least two terminally-unsaturated organic groups per molecule, (II) an organohydrogenpolysiloxane having an average of at least two silicon-bonded hydrogen atoms per molecule, (III) a hydrosilylation catalyst, (IV) a fluoroorganosilicone having at least one functional group reactive with component (I), component (II), or both, (V) an unsaturated ester-functional compound, and (VI) an adhesion promoter. The composition may also include one or more optional components selected from (VII) a void reducing agent, (VIII) a pigment, (IX) a filler, (X) a cure modifier, (XI) a rheology modifier, and (XII) a spacer.

Abstract: A composition is prepared by mixing components including: (I) a polyorganosiloxane having an average of at least two unsaturated organic groups per molecule, with the proviso that component (I) is free of fluorine atoms; optionally (II) an organohydrogenpolysiloxane having an average of at least two silicon-bonded hydrogen atoms per molecule, with the proviso that component (II) is free of fluorine atoms; (III) a hydrosilylation catalyst; (IV) a fluoroorganosilicone, with the provisos that (1) component (IV) has at least one functional group reactive with component (I), component (II), or both, (2) when component (II) is not present, then component (IV) has an average of at least two silicon-bonded hydrogen atoms per molecule, and (3) component (IV) is added to the composition in an amount sufficient to provide chemical resistance to a cured product of the composition; and (V) an adhesion promoter.

Abstract: A flexible bakeware compound includes an addition-cured silicone polymer with approximately 0.1 to 15 weight percent of polytetrafluoroethylene. More specifically, the compound preferably includes a methyl vinyl silicone polymer from about 40 to 70 weight percent, a filler from about 5 to 50 weight percent, chloro platanic acid from about 0.1 to 5 weight percent, and polytetrafluoroethylene in an amount of about 6 weight percent. A flexible bakeware container is also provided that includes a receiving channel in a shoulder of the baking container. A carrier is received by the receiving channel to add rigidity to the shoulder, thereby enabling a user to more easily carry the flexible baking container.

Abstract: A hydrido-silicone resin is incompletely reacted with an olefin under hydrosilylation conditions to produce a partially substituted hydrido-silicone that is further reacted under hydrosilylation conditions with a vinyl containing silicone to consume the remaining hydride species to produce a composition that is useful as an anti-mist agent in the coating of flexible supports.

Abstract: The present invention provides such a three-dimensional ladder polymer that has, as a main chain, a silsesquioxane skeleton having a structure of the cage structure of octasilsesquioxane with two broken corners. The polymer of the invention is a polymer obtained by using a silsesquioxane derivative represented by formula (1-0). R0 each represents hydrogen, alkyl, cycloalkyl, aryl or arylalkyl, R1 each represents chlorine, a group defined as similar to R0, or a group having —CN, X independently represents hydrogen, chlorine, a group defined as similar to R1, or a group having one of —CH?CH—, —C?C—, —OH, —COOH, —COO—, 2-oxapropane-1,3-dioyl, oxiranyl, oxiranylene, oxetanyl, oxetanylene, 3,4-epoxycyclohexyl, —SH, —NCO, —NH— and —NH2; and at least two of X each is a reactive group.

Abstract: Polyorganosiloxane compositions crosslinkable by addition of Si-bonded hydrogen to aliphatic carbon-carbon multiple bonds which have extended pot life or are preparable as storage stable one component compositions including latent catalysts of specific platinum complexes.

Abstract: A process for preparing organopolysiloxanes bearing triorganosiloxy groups of defined structure involves reacting, in a first step, organopolysiloxanes having SiH groups with water in the presence of a metal of transition group VIII or compounds thereof as a catalyst, optionally in the presence of cocatalysts, to provide Si—OH group-containing intermediates, and, in a second step, reacting the intermediates bearing SiOH groups with silanes which have a group reactive toward SiOH groups. The reaction proceeds rapidly in high yield and with few byproducts.

Abstract: Hydrosilylatable compositions employ ruthenium compounds with a ligand sphere comprising at least two independent carbon ?-bonded ligands, at least one of these ligands being selected from the group consisting of ?6-bonded arene ligands, ?6-bonded triene ligands, ?4-bonded 1,5-cyclooctadiene ligands and ?4-bonded 1,3,5-cyclooctatriene ligands as a hydrosilylation catalyst.

Abstract: A silicone rubber composition containing 0.5-90% by weight of a metal powder and curable into a non-conductive silicone rubber having a volume resistivity of at least 1×109 ?·cm is useful for the sealing and encapsulation of electric and electronic parts because the metal powder is sulfided with a sulfur gas into a metal sulfide powder which prevents or retards the sulfur gas from reaching the electric and electronic parts.

Abstract: An epoxy/silicone mixed resin composition comprising (A?) an organosilicon compound containing at least one aliphatic unsaturated monovalent hydrocarbon group and at least one silicon atom-bonded hydroxyl group, (B) an epoxy resin containing at least one epoxy group, (C) an organohydrogenpolysiloxane, (D) a platinum group metal-based catalyst, and (E) an aluminum-based curing catalyst is used to encapsulate a light-emitting semiconductor member. The light-emitting semiconductor device undergoes little discoloration in a heat test, and has a high emission efficiency, a long life and reduced energy consumption.

Abstract: The invention relates to adhesive silicone elastomer compositions which can be crosslinked by polyaddition. The composition, crosslinkable by polyaddition (hydrosilylation), comprises: ?/ at least one polyorganosiloxane (POS) bearing ethylenic and/or acetylenic unsaturations [POS with ?Si-(unsaturated) units]; ?/ at least one polyorganosiloxane (POS) with ?Si—H units; ?/ a catalytic combination comprising ?.1 at least one metallic catalyst (preferably platinum based), ?.2 and at least one crosslinking inhibitor; ?/ a filler; ?/ at least one adhesion promoter; ?/ at least one POS resin; ?/ at least one thermal resistance agent; and ?/ optionally at least one other functional additive. Methods of making and using the subject composition are also described.

Abstract: The present invention relates to new high-functionality, highly branched or hyperbranched polylysines, to processes for preparing them, and to their use.

Abstract: A method for processing polyester wastes, especially used polyester bottles, which comprises shredding, washing, drying and melting the waste mixture to obtain a starting raw material wherein a modifying agent selected from the group comprising a combination of polysiloxane and a plasticizer selected from the group of phthalates, or a combination of silazanes and silanes is added to the shredded and dried waste mixture, the amount of the modifying agent being 4 to 6% by weight, based on the waste mixture.

Abstract: Silicone rubber materials comprising finely divided phase change materials such as crystalline alkyl hydrocarbons or salt hydrates facilitate thermo-regulation due to latent heat absorption and latent heat release in the phase transition range of the phase change material, which improves the thermal performance and enhances the comfort sensation when using the silicon rubber material in item such as car seats, bicycle saddles, diving suits, building materials or medical devices.

Abstract: A porous mullite composition is made by forming a mixture of one or more precursor compounds having the elements present in mullite (e.g., clay, alumina, silica) and a property enhancing compound. The property enhancing compound is a compound having an element selected from the group consisting of Mg, Ca, Fe, Na, K, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, B, Y, Sc, La and combination thereof. The mixture is shaped and to form a porous green shape which is heated under an atmosphere having a fluorine containing gas to a temperature sufficient to form a mullite composition comprised substantially of acicular mullite grains that are essentially chemically bound.

Abstract: A silsesquioxane resin wax composition, method for its preparation, and use in personal, household, automotive and medical care compositions are disclosed. The silsesquioxane resin wax can also find utility in a variety of oil and gas field applications, such as for crude oil wax control.

Abstract: A sealing material comprising (A) an organopoly-siloxane containing at least two alkenyl groups in a molecule, (B) a resinous copolymer composed mainly of R3SiO1/2 and SiO2 units in a molar ratio of 0.5-1.5:1, wherein R is a monovalent hydrocarbon group, and containing 5×10?3 to 1×10?4 mol/g of vinyl groups, (C) an organohydrogenpolysiloxane containing at least two Si—H groups in a molecule, (D) fumed silica having a specific surface area of 150-400 m2/g, and (E) an addition reaction catalyst is suited for sealing one side edge of a polymer electrolyte fuel-cell separator since it has excellent acid resistance and improved compression set in acidic solutions, and exerts satisfactory seal effects.

Abstract: Disclosed are heterogeneous platinum group metal catalysts that are catalytically active towards hydrosilylation. These catalysts include a carrier in communication with platinum group metal particles, wherein the particles are affixed to a polyelectrolyte layer. Also disclosed are polymers that are the hydrosilylation reaction product of (a) a polysiloxane containing silicon hydride and (b) an organic compound having aliphatic unsaturation in the molecule, wherein the hydrosilylation reaction is carried out in the presence of a catalytic amount of such a catalyst, a heterogeneous platinum group metal catalyst that is catalytically active towards hydrosilylation, coating compositions that include such polymers and substrates at least partially coated with such compositions.

Abstract: A process for the preparation of organosilicon compounds bearing silanol groups, in particular linear polyorganosiloxanes bearing lateral silanol groups, in a predictable manner and high yield, comprising reacting a similarly constructed Si—H functional organosilicon compound with water in the presence of a Group VIII metal catalyst, optionally in the presence of a cocatalyst. Predictable product structure and very few byproducts are particularly advantageous.

Abstract: Provided is an addition curing silicone composition for CIPG, including: (A) 100 parts by mass of an organopolysiloxane containing at least two alkenyl groups bonded to silicon atoms within each molecule, (B) an organohydrogenpolysiloxane, in sufficient quantity to provide from 0.4 to 10.0 mols of hydrogen atoms bonded to silicon atoms within this component (B) for every 1 mol of alkenyl groups bonded to silicon atoms within the entire composition, (C) an effective quantity of a platinum group metal-based catalyst, (D) a curing retarder, and (E) an acid-receiving agent which is inorganic. The composition yields a cured product with particularly superior compression set, and exhibits excellent storage stability, curing stability (curability following storage), and adhesion.

Abstract: In a one part organopolysiloxane gel composition comprising an alkenyl-containing branched organopolysiloxane, an SiH-termined organohydrogenpolysiloxane, and an addition reaction catalyst, the catalyst is obtained by heat aging a mixing of a platinum complex having an alkenyl-containing silane or organosiloxane as a ligand, a phosphite, and an organohydrogenpolysiloxane at 30-120° C. and an organic peroxide is concomitantly used. The composition inhibits addition reaction at room temperature, maintains storage stability over a long period, yet can cure rapidly at moderate temperature.

Abstract: The object of the present invention is to provide a method for producing an organic polymer having a terminal trimethoxy silyl group. In the method, the exchange reaction into a methoxy group can proceed within a short time even with a small amount of a catalyst, and viscosity increase caused by a side reaction during the methoxy exchange reaction can be reduced. Obtained polymer has an excellent stability, and viscosity increase during the storage of the polymer after the exchange into a trimethoxysilyl group can be reduced.

Abstract: Acyclic diene metathesis (ADMET) has been utilized in the synthesis of carbosilane and carbosiloxane polymers bearing a latent reactive methoxy-functional group on each repeat unit. The polymerization results in a linear thermoplastic polymer. The latent reactive methoxy groups remain inert during polymerization; however, exposure to moisture triggers hydrolysis and the formation of a chemically cross-linked thermoset. The thermoset's properties can be modified by varying the ratio of carbosilane and carbosiloxane repeat units in the final material. Also, increasing cross-link density by using cross-linkable chain-end groups and increasing the run length of the soft phase, maximizing phase separation and elasticity, allows for the synthesis of elastic thermosets exhibiting good tensile strength. Adding a trifunctional ADMET active chain-end cross-linker to the system improved the mechanical behavior of the resulting polymer.

Abstract: An epoxy resin composition can be used for forming a film having excellent water-repellency on a substrate surface. The epoxy resin composition contains (a) an epoxy resin having at least two alicyclic epoxy groups, at least one perfluoroalkyl group having 6 to 12 carbon atoms, and at least one alkylsiloxane group and (b) a cationic polymerization catalyst. The alicyclic epoxy groups and the perfluoroalkyl group are present in branched chains of the epoxy resin, and the alkylsiloxane group is present in the main chain of the epoxy resin.

Abstract: A curable aryl (thio)ether aryl silicon composition is disclosed. A cured aryl (thio)ether aryl polysiloxane composition is further disclosed, along with a method of making that cured aryl (thio)ether aryl polysiloxane composition from the curable aryl (thio)ether aryl silicon composition. An encapsulated semiconductor device, and a method of making that encapsulated semiconductor device by coating a semiconductor element of a semiconductor device with cured aryl (thio)ether aryl polysiloxane are further disclosed.

Abstract: A curable organopolysiloxane composition is provided, which is capable of generating a silicone rubber mother mold with improved mold release durability. The composition includes (A) 100 parts by mass of an organopolysiloxane containing at least two Si-bonded alkenyl groups within each molecule, (B) an organohydrogenpolysiloxane containing at least two Si-bonded hydrogen atoms atoms within each molecule, in sufficient quantity to provide 0.4 to 5.0 mols of Si-bonded hydrogen atoms within the component (B) for each 1 mol of Si-bonded alkenyl groups within the composition, (C) 5 to 50 parts by mass of a finely powdered silica with a specific surface area measured by nitrogen gas absorption of at least 50 m2/g, (D) 0.1 to 50 parts by mass of heavy calcium carbonate with a specific surface area measured by air permeability of 0.5 to 2.5 m2/g, the surface of which has been treated with a paraffin-based compound, and (E) an effective quantity of a platinum group metal-based catalyst.

Abstract: Hybrid sol-gel materials are provided, which may be produced by the reaction of an alkyl or dialkyl substituted trialkoxysilane or dialkoxysilane reacting with a silane diol, wherein said alkyl group has from 1 to 8 carbon atoms. A process is also provided for patterning the sol-gel spin-on glass material by: a) coating a substrate with the spin-on glass material; b) exposing the coated substrate of step a) to UV illumination in a desired pattern; c) post-exposure baking the coated substrate of step b) at a temperature from 100° C. to 120° C. for 30 to 60 minutes; d) cooling the coated substrate of step c) to room temperature; e) removing the non-exposed areas of the coating on the coated substrate of step d); f) drying the coated substrate of step e); g) hard baking the coated substrate of step f) at a temperature from 120° C. and 150° C. for 1 to 3 hours.

Abstract: Silicone rubber compositions useful for high-voltage insulators, and which cure to give silicone rubbers having a low combustibility, are addition-crosslinkable or peroxide-crosslinkable silicone rubber compositions containing aluminum hydroxide as filler, with the uncrosslinked composition having a storage stability which is improved compared to the prior art and improved processing properties by including an acid, base, or a compound which liberates an acid or base upon heating. These improved properties are achieved both with surface-treated aluminum hydroxide and with untreated aluminum hydroxide.

Abstract: The present invention relates to a film made from a cross-linked polysiloxane obtained by subjecting a polysiloxane that has a specific chemical structure and contains at least two unsaturated aliphatic hydrocarbon groups in one molecule and an organosilicon compound with at least two hydrogen atoms directly bonded to silicon atoms in one molecule to cross-linking reaction in the presence of a platinum-type catalyst. The film provided by the invention possesses superior heat-resistant properties, has excellent permeability for light in the visible wavelength range, is characterized by low birefringence, and demonstrates physical properties suitable for practical application. By forming an inorganic substance layer on the aforementioned polysiloxane, it is possible to use the laminated film of the invention, e.g., as a transparent electrode film.

Abstract: The present invention provides a curable composition providing a curing product having excellent adhesive properties and high transparency, or a curing product having high toughness and transparency. A curable composition which contains (A) an organic compound containing at least two carbon-carbon double bonds reactive with a SiH group in each molecule, (B) a silicon compound having at least two SiH groups in each molecule, (C) a hydrosilylation catalyst, (D) a silane coupling agent and/or an epoxy group-containing compound, and (E) a silanol condensation catalyst. A light-emitting diode sealed with a curing product obtainable by curing said curable composition.

Abstract: The present invention aims at provision of a pressure-sensitive adhesive composition that affords a cured product having good adhesive property. Reduction of the amount of tackifier resin to be used, which is attributable to the good adhesive property, is a secondary object of the present invention. The above-mentioned problem can be solved by a pressure-sensitive adhesive composition containing (A) a polyoxyalkylene polymer having at least one alkenyl group in one molecule, (B) a compound having 1 to 3 hydrosilyl groups on average in one molecule, and (C) a hydrosilylation catalyst as essential components.

Abstract: A curable aryl siloxane composition is disclosed. A heat stable cured aryl polysiloxane composition is further disclosed, along with a method of making that heat stable cured aryl polysiloxane composition from the curable aryl siloxane composition. An encapsulated semiconductor device, and a method of making that encapsulated semiconductor device by coating a semiconductor element of a semiconductor device with the heat stable cured aryl polysiloxane are further disclosed.

Abstract: A silicone wax represented by the following formula (1), wherein R1 is a group selected from the group consisting of alkyl groups having 1 to 20 carbon atoms, alicyclic groups, aryl groups, aralkyl groups and fluorinated alkyl groups; R2 is a group having a pentaerythritol polybehenate residue represented by the following formula (2), (CH2OCOC21H43)mC(CH2O—X—)4-m??(2) wherein 1?m<4 or a group having a dipentaerythritol polybehenate residue represented by the following formula (3), O(CH2C)2(CH2OCOC21H43)n(CH2—X—)6-n??(3) wherein 1?n<6, —X— in the formulae (2) and (3) being any one of the following moieties, —R3—, —COR4—, wherein R3 is a C3-C8 alkylene group or a cycloalkylene group, R4 is a C4-C20 aliphatic or alicyclic group having at least one group selected from the group consisting of carboxyl, carbonyloxy and hydroxyl groups, p, q, r and s each is a number with 0?p?200, 0?q?200, 0?r?3, and 0?s?3, provided that 0?p+q?200 and 1?q+r+s.

Abstract: An asymmetric siloxane is made by reacting a silicone having the formula MHDxM?H where MH is R1R2HSiO1/2. M?H is R4R5HSiO1/2 and x is an integer 0?x?10 under selective hydrosilylation conditions in the presence of a precious metal hydrosilylation catalyst, with a first olefinic compound and in a second step, a monohydridosiloxane produced in the first step is reacted under hydrosilylating conditions with another olefinic compound different from the first olefinic compound.

Abstract: An asymmetric siloxane is made by reacting a silicone having the formula MHDxM?H where MH is R1R2HSiO1/2, M?H is R4R5HSiO1/2 and x is an integer 0?x?10 under selective hydrosilylation conditions in the presence of a precious metal hydrosilylation catalyst, with a first olefinic compound and in a second step, a monohydridosiloxane produced in the first step is reacted under hydrosilylating conditions with another olefinic compound different from the first olefinic compound.

Abstract: An asymmetric siloxane is made by reacting a silicone having the formula MHDxM?H where MH is R1R2HSiO1/2, M?H is R4R5HSiO1/2 and x is an integer 0?x?10 under selective hydrosilylation conditions in the presence of a precious metal hydrosilylation catalyst, with a first olefinic compound and in a second step, a monohydridosiloxane produced in the first step is reacted under hydrosilylating conditions with another olefinic compound different from the first olefinic compound.

Abstract: The present invention relates to an addition-cross-linking two component silicone material containing one or more organopolysiloxanes having at least two vinyl groups in the molecule, at least one cross-linking agent and at least one catalyst, wherein the material contains more than 1 wt %, relative to the total quantity of the two-component silicone material, of at least one organopolysiloxane of general formula I CH2?CH—SiR1R2O—(SiR1R2O)n—SiR1R2—CH?CH2, in which R1 and R2 are identical or different and are selected from the group comprising alkyl groups, aryl groups, aralkyl groups, halogen-substituted alkyl groups, halogen-substituted aralkyl groups, cyanoalkyl groups, cycloalkyl groups and cycloalkenyl groups, and n is an integral number between 1 and 9, as well as to the use of this silicone material.

Abstract: An asymmetric siloxane is made by reacting a silicone having the formula MHDxM?H where MH is R1R2HSiO1/2, M?H is R4R5HSiO1/2 and x is an integer 0?x?10 under selective hydrosilylation conditions in the presence of a precious metal hydrosilylation catalyst, with a first olefinic compound and in a second step, a monohydridosiloxane produced in the first step is reacted under hydrosilylating conditions with another olefinic compound different from the first olefinic compound.

Abstract: Disclosed are a curable silicone composition for an LED and an LED light-emitting device that uses such a composition as a sealing material. A curable silicone composition for sealing an LED is disclosed that comprises a phosphor and an inorganic ion exchanger, wherein the quantity of the inorganic ion exchanger is within a range from 0.1 to 50% by mass. This composition is ideal for sealing an LED element in an LED light-emitting device. Corrosion of metal electrodes and the like does not occur even in the presence of red phosphors that contain sulfur.

Abstract: Provided is a curable silicone resin composition including (A) a siloxane-based compound containing at least 2 addition reactive carbon-carbon double bonds within each molecule, (B) a siloxane-based compound containing at least 2 hydrogen atoms bonded to silicon atoms within each molecule, (C) a hydrosilylation reaction catalyst, (D) a phenol-based antioxidant, and (E) a hindered amine compound. Also provided are an optical semiconductor sealing material including such a composition, and an optical semiconductor device that has been sealed with such a composition. The curable silicone composition generates a cured product with high hardness and strength, excellent transparency, and excellent light transmittance and photostability particularly in the short wavelength region.

Abstract: Disclosed herein are fluorescent polysiloxanes and methods of making them. Fluorescent aryl alcohols or fluorescent aryl carbinols are reacted with hydropolysiloxanes in the presence of a catalyst to link the fluorescent groups to the polysiloxane chain through an ether linkage. The resulting compounds are fluorescent and have other desirable properties.

Abstract: An asymmetric siloxane is made by reacting a silicone having the formula MHDxM?H where MH is R1R2HSiO1/2, M?H is R4R5HSiO1/2 and x is an integer 0?x?10 under selective hydrosilylation conditions in the presence of a precious metal hydrosilylation catalyst, with a first olefinic compound and in a second step, a monohydridosiloxane produced in the first step is reacted under hydrosilylating conditions with another olefinic compound different from the first olefinic compound.

Abstract: An asymmetric siloxane is made by reacting a silicone having the formula MHDxM?H where MH is R1R2HSiO1/2, M?H is R4R5HSiO1/2 and x is an integer 0?x?10 under selective hydrosilylation conditions in the presence of a precious metal hydrosilylation catalyst, with a first olefinic compound and in a second step, a monohydridosiloxane produced in the first step is reacted under hydrosilylating conditions with another olefinic compound different from the first olefinic compound.