摘要:
A curable silicone composition which comprises: (A) an organopolysiloxane represented by an average unit formula; (B) an organopolysiloxane that has not more than 10 silicon atoms wherein from 30 to 60 mole % of all silicon-bonded organic groups therein are C2-6191 alkenyl groups; (C) an organopolysiloxane represented by a general formula; (D) an organopolysiloxane that has at least two silicon-bonded hydrogen atoms in one molecule wherein from 20 to 70 mole % of all silicon-bonded organic groups therein are phenyl groups; (E) a hydrosilylation reaction catalyst; (F) a white pigment; (G) a nonspherical silica or a glass fiber; and (H) a spherical silica, exhibits an excellent moldability and forms a cured product that exhibits little heat- and/or light-induced discoloration, little heat- and/or light-induced decline in mechanical strength, a high light reflectance, and an excellent dimensional stability.
摘要:
A curable organopolysiloxane composition that can be used as a sealant or a bonding agent for optical semiconductor elements and comprises at least the following components: (A) an alkenyl-containing organopolysiloxane that comprises constituent (A-1) of an average compositional formula and constituent (A-2) of an average compositional formula; (B) an organopolysiloxane that contains silicon-bonded hydrogen atoms and comprises constituent (B-1) containing at least 0.5 wt. % of silicon-bonded hydrogen atoms and represented by an average molecular formula, constituent (B-2) containing at least 0.5 wt. % of silicon-bonded hydrogen atoms and represented by an average compositional formula, and, if necessary, constituent (B-3) of an average molecular formula; and (C) a hydrosilylation-reaction catalyst. The composition can form a cured body that possesses long-lasting properties of light transmittance and bondability, and relatively low hardness.
摘要:
A composition includes: (I) an alkenyl functional, phenyl-containing polyorganosiloxane, an Si—H functional phenyl-containing polyorganosiloxane, or a combination thereof; (II) a hydrogendiorganosiloxy terminated oligodiphenylsiloxane having specific molecular weight, an alkenyl-functional, diorganosiloxy-terminated oligodiphenylsiloxane having specific molecular weight, or a combination thereof; and (III) a hydrosilylation catalyst. A light emitting device is made by applying the composition onto a light source followed by curing. The composition provides a cured material with mechanical properties suited for use as an encapsulant for a light emitting device.
摘要:
A curable silicone rubber composition comprises (A) an alkenyl-containing organopolysiloxane comprising (A-1) a dialkylpolysiloxane that has an average of at least two alkenyl groups in each molecule and (A-2) an alkenyl-containing, resin-form organopolysiloxane that comprises the SiO4/2 unit, R12R2SiO1/2 unit, and R13SiO1/2 unit wherein R1 is C1-10 alkyl and R2 is alkenyl and that contains the alkenyl group in the range from more than 2.5 mass % to not more than 5.0 mass %; (B) an organopolysiloxane that contains the silicon-bonded hydrogen atom; and (C) a hydrosilylation reaction catalyst in a catalytic quantity. The curable composition provides a cured silicone material that has a hardness of not more than 75 and an elongation of at least 35%. Also, a composite in which the cured silicone material provided by the thermosetting of the curable composition is integrated into a single article with a substrate.
摘要:
A process for preparing a silicone compound, the process comprising reacting (A) a silicon compound having silicon-bonded alkoxy groups or silicon-bonded aryloxy groups and (B) a disiloxane in the presence of (C) a carboxylic acid, (D) an acid catalyst, and (E) a carboxylic anhydride, and a process for preparing a silicone compound, the process comprising reacting (F) a silicon compound having silicon-bonded acyloxy groups and (B) a disiloxane compound in the presence of (D) an acid catalyst, (E) a carboxylic anhydride, and (G) an alcohol.
摘要:
A saccharide residue-functional organopolycarbosiloxane containing at least two monosaccharide or polysaccharide groups per molecule in which a specific site on the monosaccharide or polysaccharide is bonded to silicon through a thioether bond. Also, a method of preparing the saccharide residue-functional organopolycarbosiloxane, comprising condensing a saccharide residue-functional metal thiolate compound wherein the metal is an alkali metal atom or alkaline-earth metal atom, and an organopolycarbosiloxane containing groups having the formula —R2Q wherein R2 is C2 to C10 alkylene, and Q is a group selected from halogen atoms, C1 to C10 alkylsulfonate groups, and C6 to C20 arylsulfonate groups.
摘要:
A novel branched siloxane-silalkylene copolymer containing a plurality of silicon-bonded hydrogen atoms or silicon-bonded alkoxy groups in the molecule. The copolymers are used to improve properties, such as, mechanical strength, adhesiveness, and durability of the an product.
摘要:
The present invention relates to novel organosilicon compounds and a method for their preparation. More particularly, the present invention relates to novel organosilicon compounds which are synthesized from triorganosilylmethylamine (or derivatives thereof) and a nitro group-substituted aromatic halide, as well as a method for the preparation of these novel organosilicon compounds.
摘要:
An organopolysiloxane graft-type polyester is prepared by reacting, in the presence of an effective amount of a hydrosilylation catalyst, a polyester containing at least one alkenyl group and having no unsaturated terminal groups, said polyester having a number average molecular weight of about 500 to about 5,000, and an organopolysiloxane containing one hydrosilyl group. The organopolysiloxane graft-type polyester has excellent compatibility with polyesters and can improve the surface smoothness and hydrophobic property of the polyester when modified therewith.
摘要:
The present invention relates to novel organosilicon compounds and a method for their preparation. More particularly, the present invention relates to novel organosilicon compounds which are synthesized from triorganosilylmethylamine (or derivatives thereof) and a nitro group-substituted aromatic halide, as well as a method for the preparation of these novel organosilicon compounds.