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Preparation method of organic silicon resin with core-shell structure

A core-shell structure and silicone technology, applied in the field of silicone resin, can solve problems such as poor product performance, difficult structure control, uneven dispersion of siloxane, etc.

Active Publication Date: 2021-06-08
CHENGDU SILIKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current coatings are mostly prepared by extrusion and granulation of siloxane and silicon dioxide. This processing method has the problems of uneven dispersion of siloxane and difficult control of the structure, resulting in poor product performance.

Method used

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Examples

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preparation example Construction

[0021] The invention provides a method for preparing a core-shell organosilicon resin, comprising the following steps:

[0022] S1, the surface of the silica is treated with a vinyl-containing silane coupling agent and polymethyl methacrylate to obtain modified silica;

[0023] S2 Add the modified silica and anhydrous solvent in S1 to the reactor, and then add polysiloxane prepolymer, platinum catalyst and hydrogen-containing polysiloxane to react. After the reaction, a core-shell structure organic compound is obtained. Silicone.

[0024] In the present invention, the raw materials of silicone resin include 30-80 parts of silicon dioxide, 0.1-2 parts of silane coupling agent containing vinyl, 5-20 parts of polymethyl methacrylate, poly 150-200 parts of siloxane prepolymer, 5-30 parts of hydrogen-containing polysiloxane, and 0.05-15 ppm (calculated as metal platinum) of the total weight of the raw material of silicone resin as platinum catalyst.

[0025] In the present invent...

Embodiment 1

[0037] Core-shell silicone resins include raw materials of the following components:

[0038] 65 parts of nano-silica, 1.2 parts of KH570, 15 parts of polymethyl methacrylate with a molecular weight of 8000, 180 parts of octamethylcyclotetrasiloxane, 0.8 parts of silanol sodium salt, 3 parts of N-methylpyrrolidone, 3 parts of divinyltetramethyldisiloxane, 10 ppm of platinum catalyst, and 15 parts of hydrogen-containing polysiloxane with a molecular weight of 1000.

[0039] The preparation method of core-shell structure organosilicon resin comprises the steps:

[0040] S1 Blend KH570 with water and ethanol, add silica and sonicate for 10 minutes, centrifuge at 8000r / min for 10 minutes, dry after centrifugation, then add polymethyl methacrylate and ethanol for reaction, and the reflux temperature of ethanol is 78 °C, reflux for 8 hours to obtain modified silica;

[0041] S2 Add octamethylcyclotetrasiloxane to the reactor, heat to remove water, then add silanol sodium salt, N-m...

Embodiment 2

[0043] Core-shell silicone resins include raw materials of the following components:

[0044] 45 parts of nano-silica, 0.5 part of KH570, 8 parts of polymethyl methacrylate with a molecular weight of 8000, 160 parts of octamethylcyclotetrasiloxane, 0.5 part of silanol sodium salt, 1 part of N-methylpyrrolidone, 0.5 part of divinyltetramethyldisiloxane, 2 ppm of platinum catalyst, and 6 parts of hydrogen-containing polysiloxane with a molecular weight of 1000.

[0045] The preparation method of core-shell structure organosilicon resin comprises the steps:

[0046] S1 Blend KH570 with water and ethanol, add silica and sonicate for 10 minutes, centrifuge at 8000r / min for 10 minutes, dry after centrifugation, then add polymethyl methacrylate and ethanol for reaction, and the reflux temperature of ethanol is 78 °C, reflux for 8 hours to obtain modified silica;

[0047] S2 Add octamethylcyclotetrasiloxane to the reactor, heat to remove water, then add silanol sodium salt, N-methyl...

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PUM

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Abstract

The invention relates to the technical field of organic silicon resin, and discloses a core-shell structure organic silicon resin preparation method, and the method comprises: S1, sequentially treating the surface of silicon dioxide through a vinyl-containing silane coupling agent and polymethyl methacrylate to obtain modified silicon dioxide; S2, adding the modified silicon dioxide in the S1 and an anhydrous solvent into a reactor, then adding a polysiloxane prepolymer, a platinum catalyst and hydrogen-containing polysiloxane for reaction, and after the reaction is finished, obtaining the organic silicon resin with the core-shell structure. By adopting the preparation method disclosed by the invention, polycondensation in subsequent use procedures can be effectively avoided, and meanwhile, the organic silicon resin prepared by adopting a segmented polymerization method has good compatibility with a resin matrix and is convenient to disperse.

Description

technical field [0001] The invention belongs to the technical field of silicone resins, and in particular relates to a preparation method of a core-shell structure silicone resin. Background technique [0002] Organosilicon, that is, organosilicon compound, refers to a compound that contains Si-C bonds and at least one organic group is directly connected to a silicon atom. Linked compounds are also known as organosilicon compounds. Among them, the polysiloxane composed of silicon-oxygen bond (-Si-O-Si-) as the skeleton is the most numerous, the deepest researched and the most widely used class of organosilicon compounds, accounting for more than 90% of the total amount. . [0003] Due to the unique structure of silicone, it combines the properties of inorganic materials and organic materials. It has basic properties such as low surface tension, small viscosity-temperature coefficient, high compressibility, and high gas permeability. It also has high and low temperature res...

Claims

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Application Information

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IPC IPC(8): C08G83/00
CPCC08G83/001
Inventor 赵天宝袁诗琳陈宝书徐龙平雷霆
Owner CHENGDU SILIKE TECH
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