Abstract:
A curable composition contains (A) a perfluoro(poly)ether group-containing silane compound having two or more Si atoms bonded to at least one group selected from the group consisting of a hydroxyl group and a hydrolyzable group, (B) a compound (other than (A)) having at least two OR2 groups bonded to an Si atom (in the formula, R2 each independently are a hydrogen atom or a monovalent organic group at each occurrence) or a partial hydrolysis condensate thereof, (C) a condensation catalyst, and (D) an inorganic filler with a primary particle size from 0.01 to 0.1 μm.
Abstract:
A thermally conductive polysiloxane composition includes (A) a thermally conductive filler, and (B) at least one member selected from the group consisting of an alkoxysilyl group-containing compound and a dimethylpolysiloxane. The component (A) includes at least two thermally conductive fillers having different average particle diameters, and (A-1) indefinite-shaped aluminum nitride particles having an average particle diameter of 30 μm to 150 μm in an amount of at least 20% by mass, based on the mass of a total of the component (A).
Abstract:
A method for producing a polyorganosiloxane resin composition including: (a) mixing a thermally-conductive filler having a particle size distribution having a single peak, with a surface treatment agent containing a siloxane to form a mixture, and (b) mixing the mixture from step (a) with a polysiloxane resin.
Abstract:
A curable polyorganosiloxane composition includes (a) a polyorganosiloxane having two or more curable functional groups per molecule; (b) a crosslinking agent having per molecule two or more crosslinkable groups having reactivity with the curable functional groups of the component (a); (c) a curing catalyst capable of catalyzing a crosslinking reaction of the component (a) and the component (b); (d) a pigment which itself does not emit a fluorescent light; and (e) a UV tracer. The composition can be used as an adhesive.
Abstract:
A thermally conductive polysiloxane composition includes (A) a thermally conductive filler, (B) a polyorganosiloxane resin including at least one polysiloxane having one curable functional group in the molecule thereof, and (C) a siloxane compound having an alkoxysilyl group and a linear siloxane structure
Abstract:
This room-temperature-curable polyorganosiloxane composition contains: (A) 100 parts by mass of polyorganosiloxane consisting of: (A1) 10 to 80 parts by mass of a both ends alkoxysilyl group-terminated polyorganosiloxane and (A2) 90 to 20 parts by mass of a partial hydrolysis condensate (the number of Si atoms is 10 to 200) of a silane compound expressed by a general formula: R4bSi(OR)4-b; (B) 0.1 to 15 parts by mass of a silane compound or a partial hydrolysis condensate thereof (the number of Si atoms is 1 or more and less than 10) as a cross-linking agent; and (C) 0.1 to 15 parts by mass of an organic titanium compound as a curing catalyst. It has low viscosity and good coatability without a solvent, and forms a cured coating film excellent in scratch resistance.
Abstract:
A siloxane compound represented by the general formula (1): where R1 is a group having an alkoxysilyl group having 1 to 4 carbon atoms, R2 is a linear organosiloxy group represented by the general formula (2): where each R4 is independently a monovalent hydrocarbon group having 1 to 12 carbon atoms, Y is a monovalent hydrocarbon group having 1 to 6 carbon atoms, and d is an integer of 10 to 50, each X is independently a divalent hydrocarbon group having 2 to 10 carbon atoms, each of a and b is independently an integer of 1 or more, c is an integer of 0 or more, a+b+c is an integer of 4 or more, and each R3 is independently a monovalent hydrocarbon group having 1 to 6 carbon atoms.
Abstract:
There is provided a room-temperature-curable polyorganosiloxane composition having low viscosity and good coatability without any solvent and forming a cured coating film excellent in scratch resistance. The room-temperature-curable polyorganosiloxane composition contains: (A) 100 parts by mass of a mixture of (A1) 10 to 80 parts by mass of a polyorganosiloxane having two or more alkoxy groups bonded to silicon atoms and a prescribed viscosity, and (A2) 90 to 20 parts by mass of a polyorganosiloxane represented by an average composition formula: R1aSi(OR2)bO{4−(a+b)}/2 (R1 and R2 represent prescribed group respectively, and a and b are prescribed positive numbers), having an Mw of 2,000 to 100,000 and a three-dimensional network structure, and being in a solid state or in a semisolid state at normal temperature; and (B) 0.1 to 15 parts by mass of an organic titanium compound.
Abstract:
There is provided a room-temperature-curable polyorganosiloxane composition that provides a cured product having little decrease in hardness at high temperature and high humidity, and is excellent in adhesiveness to various base materials. The composition is a two-part room-temperature-curable polyorganosiloxane composition including a main agent composition (A) and a curing agent composition (B). The main agent composition (A) contains, at a predetermined ratio, (c) polyorganosiloxane having a resin structure represented by an average unit formula: (R13SiO1/2)p[Si(OH)xO(4−x)/2]q. The curing agent composition (B) contains (e) a trifunctional or tetrafunctional silane compound or a partial hydrolysis condensate thereof and (f) an amino group-containing silicon compound.
Abstract:
A thermally-conductive polysiloxane composition contains (A) a silver powder, (B) a polyorganosiloxane containing one or more aliphatic unsaturated groups in a molecule, (C) a polyorganohydrogensiloxane having two or more hydrogen atoms bonded to a silicon atom in a molecule, and (D) a platinum-based catalyst, wherein the component (A) includes (A-1) a flaky silver powder having a tapped density of 3.0 to 10.0 g/cm3 and an average particle size of 1 to 20 μm, and (A-2) an agglomerated silver powder having a tapped density of 1.0 to 5.0 g/cm3 and an average particle size of 1 to 10 μm, and the content ratio of component (A-1) and component (A-2) in 100 mass % of the thermally-conductive polysiloxane composition is 70 to 98 mass %. A heat-dissipating material uses the thermally-conductive polysiloxane composition.