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Epoxy function group-containing silicone resin preparation method

A technology of epoxy functional groups and silicone resin, which is applied in the field of silicone resin preparation, can solve the problems of low epoxy value, easy color or opacity of the product, and achieve low epoxy value, high controllability of epoxy value, side effects less responsive effect

Inactive Publication Date: 2014-08-06
CHANGZHOU INST OF CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The preparation method of the above-mentioned epoxy functional group-containing silicone resin has the problems that the obtained product is easy to be colored or opaque, and the epoxy value is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A. Synthetic silicone resin: In a 500ml reaction flask equipped with a constant pressure burette, stirring, refluxing and heating devices, sequentially add 124.8 grams of ethyl orthosilicate, 89.4 grams of hexamethyldisiloxane, and 8.9 grams of vinyl. Double seal head and 28.9 grams of ethanol, stir well. When the system was heated to 25°C, 4.3 g of hydrochloric acid and 32.4 g of deionized water were added dropwise as catalysts, and the dropping was completed in one hour. After dripping, the temperature was raised to 40°C to 45°C for half an hour. The temperature is raised and refluxed for 2-4 hours, and the temperature is lowered. Use toluene as the extractant to separate the acid water layer and wash with water until it is neutral.

[0033] B. Polycondensation reaction: In a 500ml reaction flask equipped with nitrogen inlet and outlet, stirring, water separation and heating devices, take 140 grams of the product of step A adjusted to 50% with toluene, and add 30 grams...

Embodiment 2

[0036] A. Synthetic silicone resin: In a 500ml reaction flask equipped with a constant pressure burette, stirring, reflux and heating devices, add 250 grams of ethyl orthosilicate, 110 grams of hexamethyldisiloxane, and 6.7 grams of vinyl. Double-head and 42g ethanol, stir well. When the system was heated to 25°C, 4.1 g of hydrochloric acid and 62.8 g of deionized water were added dropwise as catalysts, and the dropping was completed in one hour. After dripping, the temperature was raised to 40°C to 45°C for half an hour. The temperature is raised and refluxed for 2-4 hours, and the temperature is lowered. Use toluene as the extractant to separate the acid water layer and wash with water until it is neutral.

[0037] B. Polycondensation reaction: In a 500ml reaction flask equipped with nitrogen inlet and outlet, stirring, water separation and heating devices, take 200 grams of the product of step A adjusted to 50% with toluene, and add 150 grams of silane coupling agent γ-glyci...

Embodiment 3

[0040] A. Synthetic silicone resin: In a 500ml reaction flask equipped with a constant pressure burette, stirring, refluxing and heating devices, add 198 grams of phenyltrimethoxysilane, 81 grams of hexamethyldisiloxane and 36.2 grams of ethanol. , Stir well. When the system was heated to 25°C, 3.6 grams of hydrochloric acid and 43.2 grams of deionized water were added dropwise as catalysts, and the dripping was completed in one hour. After dripping, the temperature was raised to 40°C to 45°C for half an hour. The temperature is raised and refluxed for 2-4 hours, and the temperature is lowered. Use toluene as the extractant to separate the acid water layer and wash with water until it is neutral.

[0041] B. Polycondensation reaction: In a 500ml reaction flask equipped with nitrogen inlet and outlet, stirring, water separation and heating devices, take 200 grams of the product of step A adjusted to 50% with toluene, and add 245 grams of silane coupling agent γ-glycidyl ether O...

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PUM

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Abstract

The invention discloses a colorless and transparent epoxy function group-containing silicone resin preparation method. The method comprises the following steps: adding a catalyst solution into a reaction bottle provided with alkoxy silane, an end capping reagent and a solvent in a dropwise manner, polycondensing, extracting to obtain a silicone resin solution, reacting the silicone resin solution with epoxy alkyl siloxane under the action of a catalyst at 80-150DEG C for 2-6h, neutralizing, filtering, washing with water, and distilling to prepare an epoxy function group-containing silicone resin. The silicone resin prepared through the method is colorless and transparent, has an epoxy value of 0.1-0.5, and has an excellent caking property with a PPA base material.

Description

Technical field [0001] The invention relates to a method for preparing a silicone resin, in particular to a method for preparing a silicone resin containing epoxy functional groups. Background technique [0002] Silicone resin is a polyorganosiloxane with a highly cross-linked network structure. It has the dual characteristics of organic resin and inorganic material, and has unique physical and chemical properties. The non-polarity of organosilicon molecular chains leads to smaller molecular interactions and lower adhesion to the substrate. Epoxy resin, known as "universal glue", is widely used because of its strong bonding force with most substrates. If a small amount of epoxy groups are introduced into the silicone resin, the silicone resin will make up for it. At the same time, it can also improve the bonding force between the reinforced material and the substrate. [0003] US5516858 discloses a method for preparing silicone resin containing epoxy functional groups. The toluen...

Claims

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Application Information

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IPC IPC(8): C08G77/38
Inventor 单中亚刘勇陆居山王红丹王公应
Owner CHANGZHOU INST OF CHEM
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