Patent application number | Description | Published |
20080249244 | ADDITION CURING SILICONE RUBBER COMPOSITION AND ITS CURED PRODUCT - An addition curing silicone rubber composition and a cured product thereof are provided. In this composition, amount of the low molecular weight siloxane component volatilizing from the cured product has been reduced, and as a consequence, this composition is free from the problems such as clouding or haze, contact fault, adhesion failure, and hydrophobicization of the surface caused by the deposition of the volatilized low-molecular weight siloxane component on the surrounding surfaces. More specifically, the addition curing silicone rubber composition comprises; (A) 100 parts by weight of a polyorganosiloxane containing, on average, at least two alkenyl groups which are bonded to silicon atom; (B) 0.3 to 20 parts by weight of an organohydrogenpolysiloxane containing at least two hydrogen atoms which are bonded to silicon atom (SiH functional groups) per molecule; and (C) a catalytic amount of a addition reaction catalyst, and content of the polyorganosiloxane having a degree of polymerization of up to 10 and containing at least one SiH functional group per molecule is up to 0.5% by weight in relation to the entire composition. | 10-09-2008 |
20090082527 | ADDITION CURABLE SILICONE RUBBER COMPOSITION AND CURED PRODUCT THEREOF - In an addition curable silicone rubber composition, an organohydrogenpolysiloxane containing at least two SiH groups in a molecule, synthesized through cohydrolytic condensation reaction of an SiH-containing organoalkoxysilane and an SiH-free organoalkoxysilane, is included as a crosslinker. An SiH-functional low-molecular-weight siloxane fraction is substantially absent in the cured composition. | 03-26-2009 |
20090148748 | SEPARATOR AND SEPARATOR SEAL FOR POLYMER ELECTROLYTE FUEL CELLS - A rubber composition comprising (A) a mixture of two or more alkenyl-containing liquid organopolysiloxanes having different weight average molecular weights, (B) an organohydrogenpolysiloxane, (C) fumed silica having a BET specific surface area of 50-400 m | 06-11-2009 |
20090148749 | SEPARATOR AND SEPARATOR SEAL FOR POLYMER ELECTROLYTE FUEL CELLS - A rubber composition comprising (A) a liquid alkenyl-containing organopolysiloxane with Mw<100,000, (B) a gum-like organopolysiloxane with Mw≧150,000, (C) an organohydrogenpolysiloxane, (D) fumed silica, and (E) an addition reaction catalyst and having a viscosity of 20-200 Pa-s at a shear rate of 10 s | 06-11-2009 |
20090148750 | SEPARATOR AND SEPARATOR SEAL FOR POLYMER ELECTROLYTE FUEL CELLS - A rubber composition comprising (A) an alkenyl-containing organopolysiloxane, (B) a silicone resinous copolymer, (C) an organohydrogenpolysiloxane, (D) fumed silica having a BET specific surface area of 50-400 m | 06-11-2009 |
20090220849 | FUEL CELL SEPARATOR SEALING MATERIAL AND FUEL CELL SEPARATOR - For use in a fuel cell separator comprising a separator substrate, a primer layer, and an elastomeric seal, a sealing material comprises a primer composition containing Si—H groups of which the primer layer is formed, and a liquid addition-curable silicone rubber composition containing alkenyl groups and Si—H groups of which the elastomeric seal is formed. A molar ratio of the total amount of Si—H groups to the total amount of alkenyl groups per unit weight of the primer composition and the silicone rubber composition is in the range: 5.009-03-2009 | |
20110003089 | SILICONE RUBBER COMPOSITION FOR HIGHLY HEAT CONDUCTIVE THERMAL FIXING ROLL OR THERMAL FIXING BELT, FIXING ROLL, AND FIXING BELT - A thermal fixing roll or belt-forming silicone rubber composition having a high thermal conductivity, a low compression set, and an improved heat resistance which is well adapted for use as a coating material in a fixing roll or fixing belt is provided. Also provided are a fixing roll and a fixing belt formed by using such composition. The thermal fixing roll or belt-forming silicone rubber composition comprises 100 parts by weight of a heat-curable silicone rubber composition and 50 to 800 parts by weight of silicon carbide having an iron content of up to 0.2% by weight at the surface and an average particle size of 1 to 50 μm. | 01-06-2011 |
20110251311 | ADDITION CURABLE SELF-ADHESIVE SILICONE RUBBER COMPOSITION - An addition curable self-adhesive silicone rubber composition comprising (A) an organopolysiloxane containing at least two alkenyl groups, (B) an organohydrogenpolysiloxane containing at least three SiH groups, (C) an aromatic ring-free organohydrogenpolysiloxane containing at least two SiH groups, and (F) an addition reaction catalyst, with a SiH/alkenyl molar ratio ranging from 0.8 to 5.0, is briefly moldable and cures to various metals and organic resins. | 10-13-2011 |
20110301278 | CROSSLINKABLE RUBBER COMPOSITION - A crosslinkable rubber composition includes, as essential components:
| 12-08-2011 |
20120161066 | THERMALLY CONDUCTIVE SILICONE RUBBER SPONGE COMPOSITION AND FIXING ROLL - A thermally conductive silicone rubber sponge composition which is composed of 100 parts by weight of heat-curable organopolysiloxane composition, 0.1 to 50 parts by weight of organic resin hollow filler having an average particle diameter of up to 200 μm and a true specific gravity of up to 0.3, and 20 to 300 parts by weight of thermally conductive filler having an average particle diameter of 1 to 30 μm and a thermal conductivity of at least 15 W/m·K, with the highly thermally conductive silicone rubber sponge having voids accounting for 10 to 70% of the entire volume thereof. The silicone rubber sponge composition of the present invention gives a silicone rubber sponge having high thermal conductivity, small heat capacity, low hardness, light weight, and low permanent compression set. | 06-28-2012 |
20120232219 | ADDITION CURABLE SELF-ADHESIVE SILICONE RUBBER COMPOSITION - An addition curable self-adhesive silicone rubber composition comprising (A) an organopolysiloxane containing at least two alkenyl groups, (B) an organohydrogenpolysiloxane containing at least three SiH groups, (C) another organohydrogenpolysiloxane containing no other reactive groups than SiH groups, and (F) an addition reaction catalyst, with a SiH/alkenyl molar ratio ranging from 0.8 to 5.0, is briefly moldable and cures to various metals and organic resins. | 09-13-2012 |