Abstract: Provided is a release control agent containing a silicone resin having a weight average molecular weight based on standard polystyrene by gel permeation chromatography of 3,000 to 6,000 and expressed by the average unit formula: (R13SiO1/2)a(SiO4/2)1.0, wherein each R1 independently represents an alkyl group with 1 to 6 carbon atoms, and “a” represents a number from 0.5 to 1.5, and (B) a diorganopolysiloxane having at least two silicon-bonded alkenyl groups in a molecule and/or (C) an ?-olefin with 12 to 24 carbon atoms. Also provided is a releasable film-forming silicone composition containing the release control agent. The releasable film-forming silicone composition forms a releasable film with little change in release force and that does not reduce the residual adhesive strength of a pressure sensitive adhesive (PSA) after long-term aging in a state adhered to the PSA despite exhibiting a relatively large release force with respect to the PSA.

Abstract: Provided is a silicone foam sheet that expresses excellent bubble removability, that has satisfactory adhesiveness with an adherend and satisfactory sealability, that maintains the expression of these effects even when its thickness is reduced, that preferably expresses a stable modulus of elasticity over a region from a low-temperature region to a high-temperature region, and that suppresses both of its compression set in the low-temperature region and its compression set in the high-temperature region to low levels. Also provided is a method of producing such silicone foam sheet. The silicone foam sheet comprises an open-cell structure having a thickness of from 10 ?m to 3,000 ?m, wherein an open-cell ratio is 90% or more, an average cell diameter of the silicone foam sheet is from 1 ?m to 50 ?m, and 90% or more of all cells therein each has a cell diameter of 80 ?m or less.

Abstract: Provided is a silicone foam sheet that expresses excellent bubble removability, that has satisfactory adhesiveness with an adherend and satisfactory sealability, that maintains the expression of these effects even when its thickness is reduced, that preferably expresses a stable modulus of elasticity over a region from a low-temperature region to a high-temperature region, and that suppresses both of its compression set in the low-temperature region and its compression set in the high-temperature region to low levels. Also provided is a method of producing such silicone foam sheet. The silicone foam sheet comprises an open-cell structure having a thickness of from 10 ?m to 3,000 ?m, wherein wherein an open-cell ratio is 90% or more, an average cell diameter of the silicone foam sheet is from 1 ?m to 50 ?m, and 90% or more of all cells therein has a cell diameter of 80 ?m or less.

Abstract: A curable organopolysiloxane composition comprising: (A) at least one type of gum-like or liquid organopolysiloxane having a viscosity of not less than 20 mPa·s, a content of the vinyl(CH2?CH—) part of higher alkenyl groups being in a range of 2.0 to 5.0% by mass; (B) an organopolysiloxane resin formed essentially from R13SiO1/2 units and SiO4/2 units, a molar ratio of the R13SiO1/2 units to the SiO4/2 units being from 0.5 to 2.0 and a content of the vinyl(CH2?CH—) part of alkenyl groups being less than 1.0% by mass; (C) an organohydrogenpolysiloxane; (D) a hydrosilylation reaction catalyst; and, optionally, (E) an organic solvent. In such a composition, a mass ratio of the component (A) to the component (B) is in a range of 2/8 to 8/2.

Abstract: A solvent-type curable organopolysiloxane composition comprising (A) at least one type of gum-like or liquid organopolysiloxane having a viscosity of not less than 20 mPA·s, a content of the vinyl(CH2?CH—) part of higher alkenyl groups being in a range of 2.0 to 5.0% by mass; (B) an organopolysiloxane having a viscosity of not less than 1,000,000 mPa·s, a content of the vinyl(CH2?CH—) part of alkenyl groups being less than 0.1% by mass; (C) an organohydrogenpolysiloxane; (D) a hydrosilylation reaction catalyst; and (E) an organic solvent. In such a composition, a mass ratio of the component (A) to the component (B) is in a range of 2/8 to 8/2.

Abstract: A releasing laminate comprises a substrate; (A) a silicone release layer on the substrate; and (B) an adhesive layer on (A) the silicone release layer. (A) The silicone release layer is formed by curing a releasing cured film-forming organopolysiloxane composition. The releasing cured film-forming organopolysiloxane composition comprises: (a) an organopolysiloxane having at least two silicon-bonded alkenyl groups in the molecule; (b) an organohydrogenpolysiloxane; and (c) a hydrosilylation reaction catalyst. Component (a) has a tetra(4)mer to eicosa(20)mer cyclic siloxane content less than or equal to 1,000 ppm in terms of mass units. (B) The adhesive layer comprises an aqueous adhesive composition. A method for producing the releasing laminate is also disclosed.

Abstract: The present invention relates to a release film used by being interposed between a molding material and a mold when the molding material is compression molded using the mold in order to form a sealing material or reflective frame material for an optical semiconductor element, or a lens, wherein the release film comprises a silicone-based cured product layer (2) on at least a surface in contact with the molding material; as well as a compression molding method that uses the film; and a compression molding apparatus that uses the film. The release film for the compression molding of molding materials has good workability and has good releasability, and thereby, a compression molding method with which compression molding with good efficiency is possible and a compression molding apparatus with which molding with good efficiency is possible.

Abstract: A control apparatus of an electric power steering apparatus capable of firmly detecting an abnormality of a torque detection value, caused by a drift occurred in a torque sensor and by a connector contact resistor, with a simple arrangement. A current supplied from a power supply flows through a potentiometer (3A) of a torque sensor (3), this current is supplied to a current detecting resistor (13g), a drift occurred in the torque sensor (3) is detected by a voltage across terminals of this resistor, the detected drift detection voltage V.sub.is is read in a microcomputer (21), and the drift detection voltage V.sub.is is compared with a set value to judge as to whether or not the drift is present within a normal range. The torque sensor is constructed of a main potentiometer (3.sub.M) and a sub-potentiometer (3.sub.S). A change amount .DELTA.V.sub.M is calculated from a difference between a presently detected value and a previously detected value of the torque detection voltage V.sub.