A photocurable silicone composition is disclosed. A cured product of the composition is also disclosed. The photocurable silicone composition comprises: (A) an organopolysiloxane having at least one aryl group with 6 to 12 carbons and at least one alkenyl group with 2 to 12 carbons in a molecule; (B) an organic compound having at least two ether bonds and at least one aliphatic carbon-carbon double bond in a molecule; (C) a thiol group-containing organic compound comprising; (C.sub.1) an organic compound having two thiol groups in a molecule, and (C.sub.2) an organic compound having at least three thiol groups in a molecule; and (D) a photoradical initiator. The composition generally suppresses crack and delamination of a cured product laminated between two substrates after thermal aging.

A thermally-conductive silicone gel composition of the present invention contains A to D components below. A: a linear organopolysiloxane having one vinyl group at each terminal end of a molecular chain and a kinematic viscosity of 1 to 600 mm.sup.2/s, B: a linear organopolysiloxane having three or more Si—H groups in one molecule and an Si—H group content of 0.05 to 6 mol/kg, in an amount such that a ratio of the number of Si—H groups in B component to the number of vinyl groups in A component is 0.2 to 0.5, C: a platinum catalyst in a catalytic amount, and D: a thermally-conductive filler in an amount of 300 to 1000 parts by mass when a total amount of A and B is taken as 100 parts by mass.

A silicone particle containing: a dialkylsiloxane unit represented by the following general formula (1), R.sup.4.sub.2SiO.sub.2/2 (1), where, in the formula (1), R.sup.4s each independently represent a monovalent hydrocarbon group having 1 to 6 carbon atoms; and a poly(alkyleneoxyalkyl)methylsiloxane unit represented by the following general formula (2), where, in the formula (2), R.sup.1s each independently represent a hydrogen atom or a monovalent hydrocarbon group having 1 to 6 carbon atoms, R.sup.2s each independently represent a divalent aliphatic group having 1 to 6 carbon atoms, and “n” is a number that satisfies 1≤n≤20, where the silicone particle has an oxyalkylene group in a surface thereof. A silicone particle may be readily dispersed in an aqueous material without the use of a dispersant or a surfactant, the silicone particle having a hydrophilic group.

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The present invention provides a crosslinked molded article having a lower compression set; and a method for producing a crosslinked molded article by injection molding, the method enabling shortening of one cycle in injection molding, the method being suitable for obtaining a crosslinked molded article having a lower compression set. The present invention relates to a method for producing a crosslinked molded article, comprising melt-kneading a polymer composition containing a polymer having a terminal double bond, a hydrosilyl group-containing compound (Y) having at least two hydrosilyl groups per molecule, a platinum-based catalyst (Z) for hydrosilicon crosslinking, and a reaction inhibitor (D), subjecting the polymer composition to injection molding in a mold, performing primary crosslinking in the mold, removing the primary-crosslinked molded article from the mold, and then performing secondary crosslinking in a heat medium.

The present application disclose a method for preparing an oriented heat conducting sheet, which includes the following steps: Step S1, preparing a fluid composition for the heat conducting sheet; Step S2, placing the fluid composition obtained in the step S1 in an orientation molding device, applying a circumferential high-speed shear force to the fluid composition layer by layer to enable thermal conducting fillers in the fluid composition to be oriented along a shear direction to form an oriented thin-layer composition, and collecting the thin-layer composition layer by layer in a die to form a continuous multi-layer aggregate; Step S3, heat curing the multi-layer aggregate to obtain an oriented composition block; and S4, slicing the oriented composition block along the direction perpendicular to an orienting direction of the oriented composition block to obtain an oriented heat conducting sheet.

An aqueous, particle-stabilized Pickering emulsion along with methods or processes for producing the same and particles produced therefrom.

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 cPs≤5 min. post-preparation, at ambient temperature.

The present disclosure relates to a silicone rubber foam layer obtainable by a process that includes providing a substrate; providing a first solid film and applying it onto the substrate; providing a coating tool provided with an upstream side and a downstream side, wherein the coating tool is offset from the substrate to form a gap normal to the surface of the substrate; moving the first solid film relative to the coating tool in a downstream direction; providing a curable and foamable precursor of the silicone rubber foam to the upstream side of the coating tool thereby coating the precursor of the silicone rubber foam through the gap as a layer onto the substrate provided with the first solid film; providing a second solid film and applying it along the upstream side of the coating tool, such that the first solid film and the second solid film are applied simultaneously with the formation of the adjacent layer of the precursor of the silicone rubber foam; foaming or allowing the precursor of the silicone rubber foam to foam; curing or allowing the layer of the precursor of the silicone rubber foam to cure thereby forming the silicone rubber foam layer; optionally, exposing the layer of the precursor of the silicone rubber foam to a thermal treatment; and optionally, removing the first solid film and/or the second solid film from the silicone rubber foam layer.

This disclosure relates to continuous methods of making foamed silicone elastomers. This disclosure also relates to compositions used for forming foamed silicone elastomers. The compositions comprise: (i) an organopolysiloxane having at least two silicon-bonded unsaturated groups per molecule; (ii) an organohydrogensiloxane having at least two silicon-bonded hydrogen atoms per molecule; (iii) a hydrosilylation catalyst; and (iv) a physical blowing agent. Foamed silicone elastomers can be prepared from such compositions, using, for example, the methods disclosed herein.

A curable silicone elastomer composition is disclosed. The composition comprises one or more non-fluorinated polydiorganosiloxane polymers and silica filler. The silica filler is at least partially treated with a fluorinated hydrophobing treating agent. Also provided is a method of making the composition and its use in the manufacture of insulators for high voltage applications, especially high voltage direct current (HVDC) applications and accessories such as cable joints, cable terminal applications, and connectors. The fluorinated hydrophobing treating agents are selected from one or more silanol terminated fluorinated siloxane oligomer(s) having from 2 to 20 siloxane units, and/or one or more fluorinated silane diol(s), and/or one or more fluorinated trialkoxy silane(s), and/or one or more fluorinated silazane(s), or a mixture thereof.