摘要:
The photocurable silicone composition of the present invention comprises: (A) an organopolysiloxane represented by the average composition formula: R 1 a R 2 b SiO (4-a-b) /2 , wherein, R 1 is an alkenyl group having from 2 to 12 carbons, R 2 is an alkyl group having from 1 to 12 carbons, an aryl group having from 6 to 12 carbons, or an aralkyl group having from 7 to 12 carbons; provided that, at least 30 mol% of R 2 are the aryl groups or the aralkyl groups; and "a" and "b" are positive numbers satisfying: 1 ≤ a + b ≤ 2.5 and 0.001 ≤ a/(a + b) ≤ 0.2; (B) an organic compound having at least two ether bonds and at least one aliphatic carbon-carbon double bond in a molecule; (C) a compound having at least two thiol groups in a molecule; (D) a photoradical initiator having a phosphorus atom; and (E) a hindered phenol compound. The present composition solves a problem in that the part where the light is shielded stays uncured, suppresses reduction in transmittance due to coloring or haze at high temperatures or in high temperature/high humidity conditions, and achieves excellent coatability.
摘要:
This invention relates to a novel curable organopolysiloxane composition comprising: (A) an organopolysiloxane having at least two alkenyl groups in each molecule; (B) an organohydrogenpolysiloxane in an amount sufficient to provide a value of 1.1 : 1 to 10 : 1 (SiH: alkenyl group) for the molar ratio of silicon-bonded hydrogen atoms in the organohydrogenpolysiloxane to the alkenyl groups in the component (A), wherein the component (B) consists of the following components (B1) and (B2) at a mass ratio of (B1) / (B2) in the range from 100/0 to 15/85: (B1) an organohydrogenpolysiloxane having at least three silicon-bonded hydrogen atoms in each molecule and a silicon-bonded hydrogen content [Si-H] mass % satisfying the following equation: 0 0.5 wherein DP designates the average number of siloxane units in each molecule calculated by the number average molecular weight of component (B1), and said DP is in the range from 5 to 1000; (B2) an organohydrogenpolysiloxane having at least one silicon-bonded hydrogen atom in each molecule, which is different from the component (B1); and (C) a hydrosilation reaction catalyst in a catalytic amount.
摘要:
The present invention provides an optical member comprising a silicone material having excellent antifouling property while having good light transmittance, heat resistance, and strength, and an optical semiconductor device and illumination apparatus having excellent antifouling property. The present invention is an optical member comprising a silicone material containing a fluorinated surface, the proportion of F atoms being from 0.1 to 45 at% and/or the ratio of F atoms relative to C atoms being from 0.01 to 1.00 in the atomic composition percentage according to X-ray photoelectron spectroscopy (XPS) of the fluorinated surface.
摘要:
The present disclosure relates to a method of making an optical assembly. An optical device is secured in a fixture, the optical device having an optical surface, wherein a silicone film is positioned with respect to the optical surface, the silicone film having a distal surface relative to the optical surface. The method includes, among other features, imprinting the distal surface of the silicone film to create a surface imprint in the distal surface of the silicone film.
摘要:
This invention relates to a novel silicone emulsion, a water-based anchorage additive thereof and a silicone release coating composition. This invention provides a novel silicone emulsion comprising: (A) silicone compound comprising an anchorage additive for enhancing the adhesion to a polymer film substrate, wherein the anchorage additive is the reaction product of a fluid polyorganosiloxane (A1) containing at least one alkenyl group and at least one silanol group with a hydrolysable silane (A2) containing at least one epoxide group; (B) at least one surfactant; and (C) water. This invention also provides a water-based anchorage additive thereof, and a silicone release coating composition comprising (X1) said novel silicone emulsion and (X2) at least one curable silicone composition, preferably a water-based silicone release coating composition. The curable silicone release coating composition may be applied to a sheet-form substrate and cured to form a release-coated layer having good release property and improved rub- off resistance on the substrate.
摘要:
This invention relates to solventless release coating organopolysiloxane composition and sheet-form substrate having cured release coating, providing a solventless release coating organopolysiloxane composition having a viscosity of 50 to 3,000 mPa s, comprising (A) 100 parts of an organopolysiloxane fluid having a viscosity at 25°C of 10 to 1,000 mPa s and alkenyl content of 0.10 to 3.0 wt%; (B) 0.5 to 15 parts of a diorganopolysiloxane having a viscosity at 25°C of 10,000 to 150,000 mPa s, and 0.05 to 0.30% of alkenyl groups at the pendant position of its siloxane-chain and trialkylsiloxy-terminals; (C) a prescribed quantity of an organohydrogenpolysiloxane; and (D) a hydrosilylation reaction catalyst. Also, a cured release coating-bearing sheet-form substrate that has a cured coating from this solventless release coating organopolysiloxane composition is provided.
摘要:
A solid silicone-containing hot melt composition in powder form is disclosed. In some embodiments, the silicone containing hot melt composition is a reactive or unreactive silicone-containing hot melt. In some embodiments, the composition is a resin-linear silicone-containing hot melt composition and the composition comprises a phase separated resin-rich phase and a phase separated linear-rich phase. Methods of making optical assemblies and electronic devices comprising such solid silicone-containing hot melt compositions are also disclosed.
摘要:
Power devices comprising partitions are provided wherein the partitions create enclosed spaces to allow sectioned potting of the components of such devices.
摘要:
A composition for surface treatment comprises a siloxane polymer and a vehicle. The composition forms layers that are easy to clean and which have excellent physical properties, including smudge and stain resistance. In addition, durability and coefficient of friction of the layers may be selectively controlled based on the composition. A surface-treated article and methods of preparing the surface-treated article with the composition are also disclosed.
摘要:
The present invention provides a curable organopolysiloxane composition capable of producing a cured article that can be used as a transducer and provided with excellent mechanical characteristics and/or electrical characteristics. The present invention also relates to a novel curable organopolysiloxane composition for transducer use comprising a curable organopolysiloxane composition, dielectric inorganic fine particles having a specific dielectric constant of greater than or equal to 10, and fine particles having a specific dielectric constant of less than 10.