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Method for synthesizing epoxy-modified silicone resin

A technology of epoxy modification and synthesis method, applied in the field of organosilicon modification, can solve the problems of waste acid water, waste alkali water and waste salt pollution, difficult to obtain expected structural products, etc. Environmentally friendly effect

Inactive Publication Date: 2018-12-07
RUNHE ORGANICSILICONE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used method of chemical modification is to use trifunctional organosilicon monomers containing epoxy hydrocarbon groups to copolymerize under acid (base) catalysts to form epoxy-modified silicone resins, but epoxy groups are easily Open to participate in the reaction, it is difficult to obtain the product of the expected structure, and the waste acid water, waste alkali water and waste salt produced by washing or neutralization may cause pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take by weighing 272g of methyltrimethoxysilane, 118g of (3-glycidylpropyl)trimethoxysilane, and 200g of methanol, and add them into a 1000ml four-necked flask with cooling, stirring and heating devices and stir evenly; then weigh fluorine Dissolve 0.5 g of sodium fluoride in 45 g of water, slowly add sodium fluoride aqueous solution to a four-neck flask at 10°C, and continue to react for 1 hour after the addition; then raise the temperature to 40°C for 1 hour, distill under reduced pressure, and filter out fluoride Sodium obtained 250.25 g of colorless transparent epoxy-modified silicone resin.

Embodiment 2

[0017] Weigh in turn 396g of phenyltrimethoxysilane, 47.2g of (3-glycidylpropyl)trimethoxysilane, and 200g of toluene, and add them to a 1000ml four-necked flask with cooling, stirring and heating devices and stir evenly; then weigh Dissolve 0.4g of sodium fluoride in 39.6g of water, slowly add sodium fluoride aqueous solution dropwise to a four-necked flask at 10°C, and continue to react for 1 hour after the dropwise addition; then raise the temperature to 60°C for 2 hours, distill under reduced pressure, and filter out Sodium fluoride was used to obtain 308.48 g of a colorless and transparent epoxy-modified silicone resin.

Embodiment 3

[0019] Sequentially weigh 396g of phenyltrimethoxysilane, 49.2g of 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and 200g of toluene into a 1000ml four-necked flask equipped with cooling, stirring and heating devices Stir evenly; then weigh 0.4g of sodium fluoride and dissolve it in 39.6g of water, slowly add sodium fluoride aqueous solution dropwise to the four-necked flask at 10°C, and continue the reaction for 1h after the addition; then raise the temperature to 60°C and keep it for 2h , distilled under reduced pressure, and filtered off sodium fluoride to obtain 316.82 g of a colorless and transparent epoxy-modified silicone resin.

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PUM

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Abstract

The invention provides a method for synthesizing an epoxy-modified silicone resin. With the adoption of the technical scheme, the method for synthesizing the epoxy-modified silicone resin comprises the following steps: dissolving one or several of trifunctional silicone monomers containing epoxy alkyl and trifunctional silicone monomers into an organic solvent, dropwise adding an aqueous solutionof sodium fluoride into the solution for carrying out a hydrolytic polycondensation reaction, heating and condensing to remove the lower composition, and filtering the sodium fluoride to obtain the epoxy-modified silicone resin. The filtered sodium fluoride is cleaned with a solvent and can be reutilized after drying.

Description

technical field [0001] The invention relates to a method for synthesizing epoxy-modified silicone resin, which belongs to the field of silicone modification. technical background [0002] Silicone resin has excellent thermo-oxidative stability, excellent electrical insulation properties, and excellent moisture resistance, water resistance, rust resistance, cold resistance, ozone resistance and weather resistance are widely used in electronics, electrical, construction engineering, aerospace, national defense industry and other fields. However, pure silicone resin is not resistant to solvents and does not contain active surface groups, so its adhesion is also poor. Epoxy resin has excellent bonding strength to the surface of metal and non-metal materials, and is stable to alkali and most organic solvents. Therefore, the introduction of epoxy can make the silicone resin have better bonding performance and solvent resistance. [0003] At present, there are two methods of res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/14
CPCC08G77/14
Inventor 房小平易有彬吴彦岚李童成严明亮
Owner RUNHE ORGANICSILICONE NEW MATERIAL
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