A curable silicone composition is provided that is exhibits excellent wetting properties on glass substrates and that forms a cured product that has a smooth surface. The curable silicone composition comprises: (A-1) a resinous alkenyl group-containing organopolysiloxane in which aryl groups account for more than 30 mol % of all silicon atom-bonded functional groups; (A-2) a linear alkenyl group-containing organopolysiloxane in which aryl groups account for more than 30 mol % of all silicon atom-bonded functional groups; (B) a linear organopolysiloxane or a cerium-containing organopolysiloxane, in which aryl groups account for no more than 30 mol % of all silicon atom-bonded functional groups, contained in an amount of no more than 2% by mass based on the total mass of all organopolysiloxane components; (C) an organohydrogenpolysiloxane including at least 2 silicon atom-bonded hydrogen atoms per molecule, that is different from component (B); and (D) a catalyst for hydrosilylation reaction.

A UV curable silicone composition comprises: (A) 100 parts by mass of an organopolysiloxane represented by formula (1)

##STR00001##

wherein n represents a number satisfying 1≦n≦100, Ar represents an aromatic group, each of F.sup.1 and F.sup.2 is selected from groups of formulae (2) and (3), and a ratio of the number of terminal groups of the formula (3) to a total number of all the terminal groups is not lower than 20%,

##STR00002##

wherein each R.sup.1 represents a monovalent hydrocarbon group having 1 to 20 carbon atoms,

##STR00003##

wherein m represents a number satisfying 0≦m≦10, each R.sup.1 represents a monovalent hydrocarbon group having 1 to 20 carbon atoms, R.sup.2 represents an oxygen atom or an alkylene group, and R.sup.3 represents an acryloyl group, a methacryloyl group, an acryloyloxyalkyl group or a methacryloyloxyalkyl group; and (B) 0.1 to 10 parts by mass of a photopolymerization initiator.

The disclosed embodiments include an organopolysiloxane composition, a preparation method therefor, and a semiconductor component. The shore hardness of the cured product thereof is greater than A30 and less than A65. The composition comprises: (A1) solid 3D organopolysiloxane having an R.sup.1.sub.3SiO.sub.1/2 unit and an SiO.sub.4/2 unit; (A2) liquid straight-chain organopolysiloxane having an R.sup.1.sub.3SiO.sub.1/2 unit and an R.sup.2.sub.2SiO.sub.2/2 unit; the mixing viscosity of component (A1) and (A2) is between 6,000 and 20,000 mPa.Math.s; (B) liquid straight-chain polyorganohydrosiloxane having an R.sup.3.sub.3SiO.sub.1/2 unit and an R.sup.4.sub.2SiO.sub.2/2 unit; (C) an organosiloxane tackifier in which one molecule has on average at least one epoxy group; (D) a hydrosilylation catalyst of a volume enough to promote the curing of the composition. The composition of the present invention and the cured semiconductor component thereof have good heat resistance, good adhesiveness with aluminum having a mirror finish and ceramic substrate, and good resistance to humidity.

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.

The present invention relates to an article, especially a cooktop or a furniture element, comprising at least one substrate, such as a plate, made of glass-ceramic, said substrate being coated in at least one zone with a paint comprising at least: 1) a silicone resin comprising methyl and phenyl group(s), 2) a silicone resin comprising methyl group(s) and devoid of phenyl group(s), 3) one or more lamellar inorganic fillers with a thickness of less than 2 μm and with lateral dimensions, for at least 80% by weight of said fillers, of less than 10 μm, including talc and/or one or more carbonates, 4) one or more black pigments.

The present invention also relates to a process for obtaining said article.

A method for producing a polycarbonate copolymer which has siloxane constituent units represented by any of formulae (1-1)′ to (1-4)′ and prescribed polycarbonate constituent units, the method having a polymerization step for polymerizing a silane-based compound selected from among a prescribed diaryloxysilane compound, a prescribed dialkoxysilane compound and a prescribed silicon compound, a carbonate compound and a diol compound such as an aromatic diol compound or an alicyclic diol compound in the presence of a transesterification catalyst. The polymerization step is carried out in a molten state under reduced pressure while removing alcohols derived from the carbonate compound.

##STR00001##

The present technology provides a surface modifying composition comprising a silicone based, surface modifying agent suitable for use as part of a component of an electrochemical cell. The compositions can be employed as a coating for a separator, a coating for an electrode active material, and/or as part of an electrode slurry to form an electrode, e.g., an anode, of an electrochemical cell.

The invention provides a class of high RI polysiloxane vinylic crosslinkers. Each of the polysiloxane vinylic crosslinkers of the invention comprise (1) a polysiloxane segment comprising dimethylsiloxane units and aryl-containing siloxane units each having one methyl substituent and one organic substituent having up to 45 carbon atoms and at least one aryl moiety which is linked to Si atom through a linker having at least 2 (preferably 3) carbon atoms; (2) ethylenically-unsaturated groups. The invention also provides an insert or silicone hydrogel contact lens which comprises a crosslinked polymeric material comprising repeating units of at least one of such a class of high RI polysiloxane vinylic crosslinkers.

Provided are a surface-modified metal oxide particle dispersion liquid and the like including surface-modified metal oxide particles that are dispersed in a dispersion medium, the surface-modified metal oxide particles being obtained by modifying surfaces of metal oxide particles to have hydrosilyl groups, hydrophobic functional groups, and silanol groups. In the surface-modified metal oxide particle dispersion liquid, a ratio of the hydrosilyl groups to the silanol groups is 5:95 or higher and 50:50 or lower.

A surface protective film comprising a base film and a resin film thereon can be bonded to a substrate having a circuit-forming surface and separated therefrom after processing. The resin film is formed of a resin composition comprising (A) a silphenylene-siloxane skeleton-containing resin, (B) a compound capable of reacting with an epoxy group in the resin to form a crosslinked structure, (C) a curing catalyst, and (D) a parting agent.