There is provided a surface-modified-metal-oxide-particle material including surface-modified-metal-oxide-particles obtained by performing surface modification on metal oxide particles with a surface-modifying material, in which the surface-modifying material includes a predetermined silicone compound, an average primary particle diameter of the metal oxide particles is 3 nm to nm, viscosity at 25 C. is 1000 Pa.Math.s or less, and transmittance of light at a wavelength of 400 nm to 800 nm and a thickness of 1 mm is 60% or greater, a composition for sealing optical semiconductor element, and an optical semiconductor device using the same.

A polymer material comprising a constraint bicyclic bridged structure such as bicyclo(2,2,1) ring system, most preferably a norbornyl group, pendant to a siloxane backbone. The bridged bicyclic-containing materials can exhibit good refractive index, transparency, gas permeability, and/or other properties making them suitable for use in a variety of applications.

A polymer material comprising a constraint bicyclic bridged structure such as bicyclo(2,2,1) ring system, most preferably a norbornyl group, pendant to a siloxane backbone. The bridged bicyclic-containing materials can exhibit good refractive index, transparency, gas permeability, and/or other properties making them suitable for use in a variety of applications.

A method of preparing an organotin containing hyperbranched polysiloxane structure includes the following steps: (1) by weight, 0.5-1.5 portions of hyperbranched polysiloxane with reactive functional groups is dissolved in 50-100 portions of an alcohol solvent, to obtain a solution A; (2) by weight, 0.5-0.9 portions of a tin-based initiator and 50-100 portions of the alcohol solvent are mixed to obtain a solution B, wherein said tin-based initiator is selected from dihydroxy butyl tin chloride, butyl tin trichloride, and dibutyl tin dichloride; and (3) dropping the solution B into the solution A at the temperature of 0 C.-60 C., reacting for 3-6 h, filtering and drying to obtain the organotin containing hyperbranched polysiloxane structure.

A method of preparing an organotin containing hyperbranched polysiloxane structure includes the following steps: (1) by weight, 0.5-1.5 portions of hyperbranched polysiloxane with reactive functional groups is dissolved in 50-100 portions of an alcohol solvent, to obtain a solution A; (2) by weight, 0.5-0.9 portions of a tin-based initiator and 50-100 portions of the alcohol solvent are mixed to obtain a solution B, wherein said tin-based initiator is selected from dihydroxy butyl tin chloride, butyl tin trichloride, and dibutyl tin dichloride; and (3) dropping the solution B into the solution A at the temperature of 0 C.-60 C., reacting for 3-6 h, filtering and drying to obtain the organotin containing hyperbranched polysiloxane structure.

A silicone gel composition comprising: (A) branched organopolysiloxane having, on average, at least two alkenyl groups bonded to silicon atoms in a molecule, and a viscosity ranging from 10 to 10,000 mPa.Math.s at 25 C.; (B) organohydrogenpolysiloxane; (C) platinum-based addition reaction catalyst; and (D) a reaction product of (d1) alkali metal silanolate with (d2) at least one ceric salt selected from cerium chloride and a carboxylic acid salt of cerium.

An insulated wire includes a wire conductor and an insulation covering that is made of a crosslinked polymer material and covers the outer periphery of the wire conductor, the crosslinked polymer material includes a metal ion and a silicone resin having a side chain which includes a substituent group capable of forming an ionic bond with the metal ion, and the silicone resin forms a crosslinked product through the ionic bond between the substituent group and the metal ion. A crosslinkable polymer composition including a metal compound from which the metal ion is released by heat and the silicone resin is disposed on an outer periphery of the wire conductor, and then the crosslinked product is formed from the crosslinkable polymer composition by heating to produce the insulation covering made of the crosslinked polymer material, and thus the insulated wire is produced.

An insulated wire includes a wire conductor and an insulation covering that is made of a crosslinked polymer material and covers the outer periphery of the wire conductor, the crosslinked polymer material includes a metal ion and a silicone resin having a side chain which includes a substituent group capable of forming an ionic bond with the metal ion, and the silicone resin forms a crosslinked product through the ionic bond between the substituent group and the metal ion. A crosslinkable polymer composition including a metal compound from which the metal ion is released by heat and the silicone resin is disposed on an outer periphery of the wire conductor, and then the crosslinked product is formed from the crosslinkable polymer composition by heating to produce the insulation covering made of the crosslinked polymer material, and thus the insulated wire is produced.

The invention relates to a curable composition showing antimicrobial activity in cured state, the composition comprising (A) at least one boron containing siloxane resin consisting of constitutional units of formula (I)

(YZ).sub.nSiR.sup.1.sub.mX.sub.pO.sub.q(I) wherein: R.sup.1 groups may be the same or different and each is independently selected from a hydrogen atom or a linear, branched, or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom; X is a hydrolysable group, including, but not limited to OH (hydroxy), Cl, Br, I, or OR.sup.2 (alkoxy or aryloxy), wherein R.sup.2 is a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom; Z is selected from a linear, branched or cyclic hydrocarbon residue having 2 to 60 carbon atoms which may contain at least one heteroatom; Y is a boron containing group; n, and q are integers from 1 to 3, and m and p are integers from 0 to 2 wherein n+m+p+q=4; (B) optionally, at least one curing catalyst.

The invention also relates to an adhesive, sealant, or coating material comprising the curable composition and to use of the curable composition as an adhesive, sealant, or coating material.

The invention relates to a curable composition showing antimicrobial activity in cured state, the composition comprising (A) at least one boron containing siloxane resin consisting of constitutional units of formula (I)

(YZ).sub.nSiR.sup.1.sub.mX.sub.pO.sub.q(I) wherein: R.sup.1 groups may be the same or different and each is independently selected from a hydrogen atom or a linear, branched, or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom; X is a hydrolysable group, including, but not limited to OH (hydroxy), Cl, Br, I, or OR.sup.2 (alkoxy or aryloxy), wherein R.sup.2 is a linear, branched or cyclic hydrocarbon residue having 1 to 20 carbon atoms which may contain at least one heteroatom; Z is selected from a linear, branched or cyclic hydrocarbon residue having 2 to 60 carbon atoms which may contain at least one heteroatom; Y is a boron containing group; n, and q are integers from 1 to 3, and m and p are integers from 0 to 2 wherein n+m+p+q=4; (B) optionally, at least one curing catalyst.

The invention also relates to an adhesive, sealant, or coating material comprising the curable composition and to use of the curable composition as an adhesive, sealant, or coating material.