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Preparation method of electronic silicon resin with high purity and controllable viscosity

A silicone resin, high-purity technology, applied in the field of silicone resin preparation, can solve the problems of silicone resin molecular weight growth, silicone resin molecular weight is difficult to control, etc., to achieve the effect of good compatibility, excellent stability and electrical properties

Active Publication Date: 2021-11-16
SHANDONG DONGYUE ORGANIC SILICON MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition to the above-mentioned problems, since the prepolymer of silicone resin contains acid and alkaline substances, in the process of removing volatile components such as solvents and alcohols, it is generally necessary to remove the volatile substances relatively cleanly. Therefore, the acid or alkaline substances contained in the silicone resin prepolymer start to play a role, making the silicone resin further react and condense, and the molecular weight of the silicone resin further increases, making it difficult to control the molecular weight of the silicone resin

Method used

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  • Preparation method of electronic silicon resin with high purity and controllable viscosity
  • Preparation method of electronic silicon resin with high purity and controllable viscosity
  • Preparation method of electronic silicon resin with high purity and controllable viscosity

Examples

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preparation example Construction

[0023] Preparation of silicone resin prepolymer A (preparation method of alkoxysilane): use tetraethyl orthosilicate and place it in a high position tank, add dilute hydrochloric acid (deionized water and concentrated hydrochloric acid configuration, concentration 1%) and hexamethasone base disiloxane, slowly add tetraethyl orthosilicate in the head tank under stirring, control the temperature of the reaction system below 65°C, continue to stir for 4 hours after the addition is complete, let stand to separate layers, and separate the silicone resin pre- Polymer, and then add 20% toluene of prepolymer quality, further stand still, remove water layer to obtain silicone resin prepolymer A.

[0024] Preparation of silicone resin prepolymer B (chlorosilane method): firstly, phenyltrichlorosilane and hexamethyldisiloxane are used in a molar ratio of 1:3, placed in a high-level tank, and deionized water is added to the reaction kettle and toluene, slowly add the mixture of phenyltric...

Embodiment 1

[0026] Take 500g of silicone resin prepolymer A, add 300g of ethanol, bubble nitrogen, heat to reflux state, reflux for 2h, and remove toluene and ethanol by vacuum distillation to obtain the product. Repeat three times to obtain products 1-1, 1 respectively. -2 and 1-3.

Embodiment 2

[0028] Take 500 g of silicone resin prepolymer B, add 300 g of isopropanol, bubble nitrogen, heat to reflux state, reflux for 2 hours, remove toluene and isopropanol by distillation under reduced pressure to obtain the product, repeat three times, and obtain product 2 respectively -1, 2-2 and 2-3.

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Abstract

The invention relates to a preparation method of silicon resin, in particular to a preparation method of electronic silicon resin with high purity and stable and controllable viscosity. The preparation method comprises the following steps: a, hydrolyzing chlorosilane to prepare silicon resin or standing alkoxy silicon resin hydrolysate, and carrying out oil-water separation to obtain a silicon resin prepolymer A; b, dissolving the silicon resin prepolymer A with a solvent, carrying out oil-water separation, and separating a water layer to obtain a silicon resin prepolymer B; c, adding alcohol, uniformly stirring, heating and refluxing; and d, distilling to remove the solvent and the alcohol to obtain a silicon resin product. The silicon resin product prepared by the method is controllable in viscosity and high in purity, does not contain metal ions and chloride ions, can be applied to the field of electronics, and has very excellent stability and electrical performance.

Description

technical field [0001] The invention relates to a preparation method of a silicone resin, in particular to a preparation method of a high-purity, viscosity-controllable silicone resin for electronics. Background technique [0002] As one of the most important products of electronic materials, silicone resin has a variety of forms and structures, especially because of its good weather resistance and electrical properties, it is widely used in the electronic field. Commonly used are solvent-based, solvent-free, emulsion and other forms. Generally, it is used as an adhesive or protective coating to protect electronic components and play the role of fixed bonding, moisture-proof, dust-proof, salt spray resistance, etc. Since the resin material is in contact with electrical components for a long time, its purity requirements are relatively high to meet its electrical requirements. performance. [0003] Many silicone resins for electronics have very high requirements on the ion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/06C08G77/34
CPCC08G77/06C08G77/34
Inventor 伊港刘海龙高梓寒张明石科飞孙晓雷张帅张海雷邢松松周磊周玲
Owner SHANDONG DONGYUE ORGANIC SILICON MATERIAL