A sponge-forming silicone rubber composition is disclosed. The sponge-forming silicone rubber composition comprises: (A) an organopolysiloxane having at least two alkenyl groups per molecule; (B) an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms per molecule; (C) water; (D) a thickener; (E) a surfactant; (F) a silane compound having silicon atom-bonded alkoxy groups, or a partially hydrolyzed condensate thereof; and (G) a hydrosilylation reaction catalyst. The sponge-forming silicone rubber composition forms a silicone rubber sponge. In general, the silicone rubber sponge has excellent water absorption and water retentivity.

An adsorption temporary fixing material comprises an adsorption temporary fixing sheet including a foam layer having an open-cell structure, wherein the adsorption temporary fixing material includes the foam layer in the entirety of the sheet or on at least one surface thereof, wherein a shear adhesive strength of a surface of the foam layer with a SUS304BA plate at 23 C. is 1 N/100 mm.sup.2 or more at a tensile rate of 50 mm/min, wherein a peel strength of the surface of the foam layer from the SUS304BA plate at 23 C. is 1 N/20 mm or less at a peel angle of 180 and a tensile rate of 300 mm/min, and wherein a weight change ratio after the adsorption temporary fixing sheet has been immersed in distilled water for 1 minute and then water droplets have been wiped off the surface thereof is 50% or less.

Pressure sensing layers, devices comprising same, pressure sensing monitors and composite materials comprising a) a porous matrix material comprising a siloxane polymer, comprising a closed porosity volume fraction, and, optionally, an open porosity volume fraction, and b) a conductive or semiconductive filler substantially present in said closed porosity volume fraction of said porous matrix material a), and films, coated substrates and multilayer structures comprising the composite material and the use thereof in pressure sensing devices.

A silicone foam is described that is produced in-situ at a wound site, e.g. in a wound cavity, through a multi-component system, based on a physical foaming process, wherein the gas required to form the foam structure is provided through a blowing agent independently of the curing reaction of polyorganosiloxane components of the multi-component system. Therefore, the blowing agent is provided as a distinct entity of the multi-component system that is, in particular, not the result of any chemical reaction taking place in the multi-component system. A device for producing the foam and the corresponding negative pressure wound therapy kit are also described.

This invention relates to an aqueous coating composition, a greaseproof article and a process of forming a coating on a substrate. The aqueous coating composition comprises at least the following components: an organopolysiloxane (A) which is a polysiloxane compound having at least two alkenyl groups per molecule, an organohydrogenpolysiloxane (B) which is a polysiloxane compound comprising at least two Si H groups per molecule, an hydrosilylation catalyst (C) able to catalyse an hydrosilylation reaction between the organopolysiloxane compound (A) and the organohydrogenpolysiloxane compound (B), an organic copolymer (D) comprising at least two types of repeating units (i) and (ii): unit (i) which is an alkyl group comprising from 2 to 2 carbon atoms, unit (ii) which is an alkyl group comprising from 2 to 12 carbon atoms and having at least one pendant alcohol substituent, water, and the composition is able to form upon curing by hydrosilylation a coating on a substrate.

Provided are rapidly cross-linkable silicone foam compositions, kits, and methods for filling implanted medical devices in situ or in vivo, the implanted medical devices, including for example, body implants and tissue expanders, the compositions including a platinum divinyl disiloxane complex; a low viscosity vinyl terminated polydimethylsiloxane; a low viscosity hydride terminated polydimethylsiloxane; a silicone cross-linker; and a gas and/or gas-filled microcapsules, where the rapidly cross-linkable silicone foam composition has a viscosity of 150 cPs for 1 min. post-preparation and 300 cPs5 min. post-preparation, at ambient temperature.

Provided is a temporary fixing sheet including a silicone foam layer and having excellent antistatic performance and a satisfactory appearance. A temporary fixing sheet includes a silicone foam layer, wherein the silicone foam layer is formed of a silicone resin composition including: an organopolysiloxane having at least two alkenyl groups in a molecule thereof; an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms in a molecule thereof; a mixture including water and an inorganic thickener; 0.2 part by weight to 1.2 parts by weight of a nonionic surfactant having an HLB value of 3 or more with respect to 1 part by weight of a component; 0.01 part by weight to 0.14 part by weight of a nonionic surfactant having an HLB value of less than 3 with respect to 1 part by weight of the component; a hydrosilylation reaction catalyst; a curing retarder; and a conductive substance.

Provided are rapidly cross-linkable silicone foam compositions, kits, and methods for filling implanted medical devices in situ or in vivo, the implanted medical devices, including for example, body implants and tissue expanders, the compositions including a platinum divinyl disiloxane complex; a low viscosity vinyl terminated polydimethylsiloxane; a low viscosity hydride terminated polydimethylsiloxane; a silicone cross-linker; and a gas and/or gas-filled microcapsules, where the rapidly cross-linkable silicone foam composition has a viscosity of 150 cPs for 1 min. post-preparation and 300 cPs5 min. post-preparation, at ambient temperature.

A silicone release coating composition is disclosed. The silicone release coating composition comprises: (A) an organopolysiloxane having at least two alkenyl groups in a molecule; (B) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule; (C) organic modified functional silica particles having an average particle size of 5 m to 15 m and a BET specific surface area of 600 m.sup.2/g to 800 m.sup.2/g; and (D) a hydrosilylation reaction catalyst. The silicone release coating composition can form a coating with a lower release force to sticky adhesive.

A sponge-forming liquid silicone rubber composition is provided. The composition generally maintains a stable emulsified state, can form a low-density silicone rubber sponge having a uniform and fine open-cell foam structure even when a coating or molding method involving shearing force and thin layer formation is used, is less likely to contract during curing, and that forms a silicone rubber sponge having a density close to the density designed on the basis of water content. A low-density silicone rubber sponge material using the sponge-forming liquid silicone rubber composition is also provided. The sponge-forming liquid silicone rubber composition comprises (A) an alkenyl group-containing organopolysiloxane, (B) an organopolysiloxane having a silicon atom-bonded hydrogen atom, (C) a mixture of water and an inorganic thickener, (D) an emulsifier, and (E) a hydrosilylation reaction catalyst. The contained amount of the component (C) in the entire composition is 70 mass % or more.