A curable composition includes: 100 parts by mass of a silicon-containing polymer having a Mw of 3,000 to 100,000 obtainable by hydrolysis-condensation of an organosilane mixture including R 1 SiX 3 , R 2 SiX 3 , R 3 R 4 SiX 2 and R 5 SiX 3 , the total of R 2 SiX 3 and R 3 R 4 SiX2 being 5 to 60 mol %, optionally a prepolymer, optionally a cyclic siloxane compound, 0.0001 to 10 parts by mass of an organic peroxide and optionally a metal catalyst, and 10 to 1,500 parts by mass of a filler, wherein R 1 is a C2-6 alkenyl group, R 2 is a C1-6 alkyl group, R 3 and R 4 are each a C1-6 alkyl group, R 5 is a phenyl group optionally substituted with a C1-6 alkyl group, and X is a C1-6 alkoxy group, one or more of R 2 to R 4 is a methyl group, f represents a number of 2 to 10, g represents a number of 0 to 8, and n represents 1 or 2.

Silicon-containing curable composition, cured product of the silicon-containing curable composition and lead frame substrate formed of the silicon-containing curable composition

The invention discloses a preparation method of methyl phenyl vinyl silicone resin The preparation method comprises the following steps: firstly mixing and agitating organic solvent, deionized water and strong acid, then dropwise adding a mixture for hydrolysis reaction, and increasing temperature and reflowing to obtain mixed solution, wherein the mixture consists of difunctional alkoxy silane, trifunctional alkoxy silane, monofunctional alkoxy silane and tetraethoxysilane; standing the mixed solution, cooling to room temperature, separating out an organic layer, washing the organic layer with deionized water till the organic layer becomes neutral, then adding an alkaline catalyst into the organic layer, increasing the temperature for azeotropic reflowing for a certain time to obtain azeotropic reflowing solution; cooling the azeotropic reflowing solution to 50 DEG C below, then adding solid acidic neutralizer, stirring for neutralizing, filtering, and conducting vacuum purification to obtain the methyl phenyl vinyl silicone resin According to the preparation method, the process is easy to control, the labor intensity is low, the whole process has small toxicity, and the preparation method has the advantages that monomer sources are wide, cost is low, and the prepared methyl phenyl vinyl silicone resin has stable storage performance

Preparation method of methyl phenyl vinyl silicone resin

Preparation method for phenyl vinyl MQ silicone resin

The invention discloses phenyl MDT silicon resin and a preparation method thereof. The phenyl MDT silicon resin adopts single-group organic silane as a M link, adopts two-group organic silane as a D link and adopts three-group organic silane as a T link, wherein at least one of the D link or the T link is the phenyl silane, and the phenyl silane is collectively hydrolyzed under an acidic catalyst and concentrated under an alkaline catalyst. Raw materials for the phenyl MDT silicon resin are available, no strong corrosive substance is generated in the reaction process, and the requirement on equipment and operation is low. The preparation method comprises the following steps of adding the acidic catalyst in the mixed liquor of the M-link silane, the D-link silane and the T-link silane. The M link, the D link and the T link are unnecessary to drop into a reactor respectively, so that the operation step is simple, the procedure is saved, the production efficiency can be improved, and the industrialized mass production can be realized. The refractive index nD of the prepared phenyl MDT silicon resin is more than 1.53.

Phenyl MDT silicon resin and preparation method thereof

The invention relates to the field of organic polymer chemistry and discloses a T-chain unit phenyl-containing MTQ silicon resin and a preparation method thereof. The T-chain unit phenyl-containing MTQ silicon resin solves the problem that a MTQ silicon resin as a silicon rubber reinforcement filler leads to a large difference between refractive indexes of a packaging material and a LED chip because of a small refractive index of the MTQ silicon resin and thus optical efficiency of a semiconductor lighting device is reduced. The preparation method comprises that tetraethoxysilane as a Q chain unit source, phenyltrimethoxysilane as a T chain unit source, hexamethyldisiloxane as an M chain unit source and 1,3-divinyltetramethyldisiloxane as an M chain unit source undergo a co-hydrolytic condensation reaction in the presence of hydrochloric acid as a catalyst to produce the T-chain unit phenyl-containing MTQ silicon resin. The T-chain unit phenyl-containing MTQ silicon resin can improve luminous efficacy of a semiconductor lighting device and improve mechanical properties of a packaging material. The preparation method allows mild reaction conditions, has simple processes and is suitable for large-scale industrial production.

T-chain unit phenyl-containing MTQ silicon resin and preparation method thereof

The invention relates to a preparation method for methyl phenyl vinyl silicone resin, and aims to solve the technical problem of providing the preparation method for transparent methyl phenyl vinyl silicone resin which has high refractive index and contains methyl phenyl silica chain link. Moreover, the preparation method has ideal reaction repeatability and controllability, no waste water generation, no bath neutralization and low labor intensity, and is characterized by comprising the following steps: mixing difunctional alkoxy silane monomer, trifunctional alkoxy silane monomer and monofunctional alkoxy silane monomer; adding water for stirring, under the action of acidic cation resin; carrying out cohydrolysis condensation reaction at a temperature of between 0 and 78 DEG C; filteringout cation resin when the reaction is finished; removing low-boiling-point substances at reduced pressure; performing aging reaction; and obtaining the methyl phenyl vinyl silicone resin.

Preparation of methyl phenyl vinyl silicon resin

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Preparation of methyl phenyl vinyl silicon resin