摘要:
A heat-conductive silicone rubber composition is provided. This composition comprises (A) an organopolysiloxane with an average of at least 0.1 alkenyl groups bonded to silicon atoms within each molecule, (B) an organopolysiloxane with an average of at least 2 hydrogen atoms bonded to silicon atoms within each molecule, (C) a heat-conductive filler, (D) a platinum catalyst, and (E) a methylpolysiloxane with a hydrolyzable group and a vinyl group, as represented by a general formula shown below. This composition displays superior molding workability and adhesion, even if a large quantity of a heat-conductive filler is added to the composition
摘要:
A method of reducing a surface glossiness of an organopolysiloxane-cured article is provided. The method comprises preparing the liquid organopolysiloxane composition for matting comprising: (A) 100 parts by weight of a thermosetting liquid organopolysiloxane composition having a specific gravity larger than the component (B), and (B) 0.1 to 100 parts by weight of a hollow filler having a melting point of at least 150° C., and a particle size of up to 200 μm, casting the liquid organopolysiloxane composition as a potting material or coating material; and curing the liquid organopolysiloxane composition at a temperature of 10 to 160 C for 30 to 180 minutes, whereby the hollow filler floats to the surface of the organopolysiloxane and forms surface irregularities on the surface of the cured article during curing to provide a surface glossiness of up to 40 in a cured article having a matted surface.
摘要:
A method of reducing a surface glossiness of an organopolysiloxane-cured article is provided. The method comprises preparing the liquid organopolysiloxane composition for matting comprising: (A) 100 parts by weight of a thermosetting liquid organopolysiloxane composition having a specific gravity larger than the component (B), and (B) 0.1 to 100 parts by weight of a hollow filler having a melting point of at least 150° C., and a particle size of up to 200 μm, casting the liquid organopolysiloxane composition as a potting material or coating material; and curing the liquid organopolysiloxane composition at a temperature of 10 to 160 C for 30 to 180 minutes, whereby the hollow filler floats to the surface of the organopolysiloxane and forms surface irregularities on the surface of the cured article during curing to provide a surface glossiness of up to 40 in a cured article having a matted surface.
摘要:
A liquid organopolysiloxane composition is provided. This composition can readily form a cured article having a matted surface without requiring separate step such as mechanical surface roughening, and this composition is well adapted for use as a potting material or a coating material in electric and electronic components such as LED. An article having a matted surface produced by curing such composition is also provided. The liquid organopolysiloxane composition for matting comprises (A) 100 parts by weight of a thermosetting liquid organopolysiloxane composition, and (B) 0.1 to 100 parts by weight of a hollow filler having a melting point of at least 150° C., a specific weight of 0.01 to 0.8, and a particle size of up to 200 μm. The composition has a viscosity at room temperature of 100 to 100,000 mPa·s. The resulting cured article has a surface glossiness of up to 40.
摘要:
An intraoral camera including a main body case, an intraoral insertion component mounted on the front side of the main body case, an imaging window provided to the intraoral insertion component, and an imaging device that is optically linked to the imaging window and is disposed inside the main body case or inside the intraoral insertion component. Illumination elements are disposed at portions of an outer peripheral wall face that are substantially opposite each other in the horizontal direction. These illumination elements are inclined toward the outside of the imaging window in the center of the imaging window, and the outer peripheral wall face that is substantially opposite these illumination elements in the vertical direction is constituted as a light collecting face that is inclined toward the outside of the imaging window in the center of the imaging window.
摘要:
Provided is an epoxy resin composition for fiber-reinforced composite materials, which serves as a matrix resin composition for use in a self-adhesive prepreg for a face sheet of a honeycomb panel. The epoxy resin composition enables to increase self-adhesiveness of the prepreg, while improving workability and appearance quality of the prepreg. The epoxy resin composition is characterized by containing: an epoxy resin (A) which is in a liquid state at room temperature; a thermoplastic resin (B) which dissolves in the epoxy resin (A) at a temperature not less than 90° C.; thermosetting resin particles (C) which do not completely dissolve in the epoxy resin (A) at a temperature less than 90° C. and has a softening point of not less than 120° C.; and a curing agent (D).
摘要:
The present invention provides an epoxy resin composition for a fiber reinforced composite material comprising an epoxy resin (A) comprising an epoxy resin (a1) having a weight average molecular weight of up to 1,000 and an epoxy resin (a2) having a weight average molecular weight of 10,000 to 100,000 which contains at least 20% by weight of the basic skeleton of the epoxy resin (a1), a thermoplastic resin (B), and a curing agent (C). The cured composition has a co-continuous phase of the epoxy resin (A) and the thermoplastic resin (B) and/or a continuous phase of the thermoplastic resin (B). A cured product having a high toughness can be obtained from this epoxy resin composition.
摘要:
Provided is an epoxy resin composition for fiber-reinforced composite materials, which is improved in toughness necessary for improving the strength of self-adhesion of a matrix resin for use in a prepreg for a face sheet of a honeycomb panel. The epoxy resin composition, which comprises: an epoxy resin (A); a thermoplastic resin (B); fine solid resin particles (C); and a curing agent (D), is characterized in that the epoxy resin composition after being cured has a morphology in which the epoxy resin (A) and the thermoplastic resin (B) form co-continuous phases, and the fine solid resin particles (C) are dispersed in at least the continuous phase of the epoxy resin (A) in the co-continuous phases.
摘要:
A liquid silicone rubber coating composition comprising (A) an organopolysiloxane containing at least two silicon-bonded alkenyl radicals, (B) an organohydrogenpolysiloxane containing at least two SiH radicals, (C) an addition reaction catalyst, optionally (D) finely divided silica, (E) triallyl isocyanurate, (F) an organosilicon compound containing an epoxy radical and a silicon-bonded alkoxy radical, and (G) a titanium or zirconium compound is coated on a surface of an airbag base fabric and cured to form a rubber coating layer thereon. The composition is suited for curtain airbags.
摘要:
An organopolysiloxane composition comprising (A) an organopolysiloxane, (B) a silane compound having at least two hydrolyzable groups or a partial hydrolyzate thereof, and (C) the addition reaction product between a vinyl group-bearing bisphenol A skeleton compound and an organoxy group-bearing silicon compound is curable at room temperature to a variety of resins including PBT, HIPS and acrylic resins.