Abstract: A silicone rubber sponge composition, including: (A) 100 parts by mass of an addition-crosslinkable silicone rubber composition containing a reinforcing silica and being liquid at 25° C.; (B) 1.0 to 20 parts by mass of expanded resin fine particles having a specific gravity of 0.01 to 0.3, having an average particle diameter of 10 to 200 ?m, and having an organic resin shell; and (C) 0.1 to 10 parts by mass of spherical particles having average particle diameter being 0.001 to 0.5 times larger than average particle diameter of the component (B) expanded resin fine particles, and having an average circularity of 0.8 to 1. This improves flowability of silicone rubber sponge composition containing the expanded resin fine particles, reduces contractive deformation due to pressure of the expanded resin fine particles during casting or injection-molding. Thus, provided are a silicone rubber sponge composition that can reduce density of a sponge rubber.

Abstract: An addition-curable liquid silicone rubber composition for LED headlamps, which contains: (A) (A-1) an alkenyl group-containing liquid organopolysiloxane, and (A-2) an alkenyl group-containing raw rubber-state organopolysiloxane; (B) a silicone resin which contains an alkenyl group, while being composed of a unit that is selected from among an R23SiO1/2 unit (M unit), an SiO4/2 unit (Q unit), an R22SiO2/2 unit (D unit) and R2SiO3/2 unit (T unit); (C) an organohydrogen polysiloxane; (D) a platinum group metal catalyst; and (E) triallyl isocyanurate.

Abstract: A heat fixing roll or belt having a silicone rubber layer which is formed by curing a silicone rubber composition comprising (A) 100 pbw of an organopolysiloxane having at least two silicon-bonded alkenyl radicals in a molecule, (B) 20-500 pbw of a metallic silicon powder having an average particle size of up to 100 ?m, and (C) an effective amount of a curing agent. The silicone rubber layer has a high heat conductivity and long-term temperature durability.

Abstract: A heat fixing roll or belt having a silicone rubber layer which is formed by curing a silicone rubber composition comprising (A) 100 pbw of an organopolysiloxane having at least two silicon-bonded alkenyl radicals in a molecule, (B) 20-500 pbw of a metallic silicon powder having an average particle size of up to 100 ?m, and (C) an effective amount of a curing agent. The silicone rubber layer has a high heat conductivity and long-term temperature durability.

Abstract: In a silicone rubber composition comprising an organopolysiloxane having at least two aliphatic unsaturated groups and a curing agent, metallized particles of inorganic material or organic resin are effectively dispersed to give a conductive composition which cures into a conductive silicone rubber part having a low and stable volume resistivity.

Abstract: A conductive silicone rubber composition comprising (A) an organopolysiloxane having at least two aliphatic unsaturated groups, (B) a conductive powder comprising a silver powder premixed with 0.2-5% by weight of fine powder selected from the group consisting of inorganic fillers and spherical organic resins, and (C) a curing agent has a stable volume resistivity.

Abstract: Proposed is a polyol-crosslinkable fluorocarbon rubber-based composition which exhibits excellent workability in milling and molding as well as excellent storage stability and is capable of giving a molded and vulcanized rubber article at a high vulcanization velocity with good mold-releasability of the molded and vulcanized rubber article from the metal mold. The rubber composition comprises, as the essential ingredients: (a) a polyol-crosslinkable fluorocarbon rubber and (b) a crosslinking agent which is, in place of a conventional polyol compound such as bisphenol A, a silylated polyol compound such as 1,1,1,3,3,3-hexafluoro-2,2-bis(4-trimethylsiloxy phenyl) propane, i.e. a silylation product of bisphenol AF.

Abstract: The electroconductive silicone rubber composition of the invention is prepared by compounding a diorganopolysiloxane with each a specified amount of spherical particles of a cured silicone elastomer, metallic electroconductivity-imparting agent, e.g., metal powder, and a curing agent, e.g., organic peroxide. The composition has good molding workability and is capable of giving a cured electroconductive silicone rubber body having good mechanical properties along with high electroconductivity despite the formulation including the metal powder. Improvements can be obtained in the elastic resilience and permanent compression set of the cured silicone rubber body by the admixture of the composition with a specific liquid organosilicon compound having a phenyl group or an alkyl group of 3 to 10 carbon atoms bonded to the silicon atoms.