A platinum organosiloxane complex is prepared by a process including combining A) a platinous halide; B) a ketone; C) an enone additive distinct from any other starting materials or rearrangement products thereof; and D) a polyorganosiloxane having, per molecule, 2 to 4 silicon bonded terminally unsaturated hydrocarbon groups having from 2 to 6 carbon. The platinum organosiloxane complex prepared by the process is useful as a hydrosilylation catalyst.

A platinum organosiloxane complex is prepared by a process including combining A) a platinous halide; B) a ketone; C) an enone additive distinct from any other starting materials or rearrangement products thereof; and D) a polyorganosiloxane having, per molecule, 2 to 4 silicon bonded terminally unsaturated hydrocarbon groups having from 2 to 6 carbon. The platinum organosiloxane complex prepared by the process is useful as a hydrosilylation catalyst.

The invention relates to a fluorescent siloxane elastomer, to a method for producing same, and to the use. The fluorescent siloxane elastomer contains the following structural elements in the network structure thereof: (I) and (II) or (III), wherein: R1 and R2 are the same or different and mean, independently of each other, a methyl, phenyl, vinyl substituent or an H atom; X means a saturated or unsaturated hydrocarbon group having 2 to 6 C atoms; A is an oxygen, nitrogen, or sulfur atom; R3 is a fluorescent dye substituent from the families of the BODIPY or BODIPY and coumarin or BODIPY and naphthalimide or coumarin and naphthalimide fluorophores. The polysiloxanes according to the invention cause a shift in the emission range out of the UV light or expansion of the emission range into the range of visible light having wavelengths of up to 800 nm, and therefore the polysiloxanes are especially suited for detectors having the maximum efficiency thereof in the range. In the combination of the optical, electrical, mechanical, and thermal properties of the polysiloxanes, the polysiloxanes differ substantially from polysiloxanes according to the prior art. The polysiloxanes form the basis for a material that meets the high requirements for high-voltage devices and can be used in particular for monitoring the aging process of insulating means in high-voltage systems. Partial electrical discharges can be reliably optically detected and localized by means of the polysiloxanes.

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.

Provided are a self-welding high dielectric silicone rubber composition and a self-welding high dielectric tape. The self-welding high dielectric silicone rubber composition comprises: (A) 100 parts by mass of an organopolysiloxane represented by an average composition formula (1) and having, in a molecule, at least two alkenyl groups bonded to silicon atoms, R.sup.1.sub.nSiO.sub.(4-n)/2 (1), (in the formula, R.sup.1 represents the same or different, unsubstituted or substituted monovalent hydrocarbon group and n is a positive number of 1.95 to 2.04); (B) 10 to 100 parts by mass of hydrophobic fumed silica having a specific surface area obtained by the BET adsorption method of 50 m.sup.2/g or larger; (C) 100 to 300 parts by mass of a conductive complex oxide; (D) 0.1 to 50 parts by mass of a boric acid or a boric acid compound; (E) 1 to 10 parts by mass of a diorganopolysiloxane capped at both molecular terminals with alkoxy groups; and (F) 0.01 to 10 parts by mass of a curing agent comprising an acyl organic peroxide. The self-welding high dielectric silicone rubber composition can be hot-air vulcanized under normal pressure by extrusion molding or roll forming with calender rolls.

Provided are a self-welding high dielectric silicone rubber composition and a self-welding high dielectric tape. The self-welding high dielectric silicone rubber composition comprises: (A) 100 parts by mass of an organopolysiloxane represented by an average composition formula (1) and having, in a molecule, at least two alkenyl groups bonded to silicon atoms, R.sup.1.sub.nSiO.sub.(4-n)/2 (1), (in the formula, R.sup.1 represents the same or different, unsubstituted or substituted monovalent hydrocarbon group and n is a positive number of 1.95 to 2.04); (B) 10 to 100 parts by mass of hydrophobic fumed silica having a specific surface area obtained by the BET adsorption method of 50 m.sup.2/g or larger; (C) 100 to 300 parts by mass of a conductive complex oxide; (D) 0.1 to 50 parts by mass of a boric acid or a boric acid compound; (E) 1 to 10 parts by mass of a diorganopolysiloxane capped at both molecular terminals with alkoxy groups; and (F) 0.01 to 10 parts by mass of a curing agent comprising an acyl organic peroxide. The self-welding high dielectric silicone rubber composition can be hot-air vulcanized under normal pressure by extrusion molding or roll forming with calender rolls.

The present invention provides a bio-electrode composition including a silicone bonded to a sulfonamide salt, wherein the sulfonamide salt is shown by the following general formula (1):

##STR00001##

wherein R.sup.1 represents a linear, branched, or cyclic alkylene group having 1 to 20 carbon atoms optionally having an aromatic group, an ether group, or an ester group, or an arylene group having 6 to 10 carbon atoms; Rf represents a linear, branched, or cyclic alkyl group having 1 to 4 carbon atoms and containing at least one fluorine atom; M.sup.+ is an ion selected from a lithium ion, a sodium ion, a potassium ion, and a silver ion. This can form a living body contact layer for a bio-electrode that is excellent in electric conductivity and biocompatibility, light-weight, manufacturable at low cost, and free from large lowering of the electric conductivity even though it is wetted with water or dried.

The present invention provides a bio-electrode composition including a silicone bonded to a sulfonimide salt, wherein the sulfonimide salt is shown by the following general formula (1):

##STR00001##

wherein R.sup.1 represents a linear, branched, or cyclic alkylene group having 1 to 20 carbon atoms optionally having an aromatic group, an ether group, or an ester group, or an arylene group having 6 to 10 carbon atoms; Rf represents a linear, branched, or cyclic alkyl group having 1 to 4 carbon atoms and containing at least one fluorine atom; M.sup.+ is an ion selected from a lithium ion, a sodium ion, a potassium ion, and a silver ion. This can form a living body contact layer for a bio-electrode that is excellent in electric conductivity and biocompatibility, light-weight, manufacturable at low cost, and free from large lowering of the electric conductivity even though it is wetted with water or dried.

Compositions containing -ketocarbonyl-functional organopolysiloxanes, aminoalkyl-functional organopolysiloxanes, and optionally an organometallic compound provide textiles with high and lasting water repellency.