Bisphenol A epoxy resin preparation method and product prepared therethrough

An epoxy resin and bisphenol technology, which is applied in the field of preparation of bisphenol A epoxy resin, can solve the problems of low softening point, high organic chlorine content, unclear process parameters, etc., and achieves high softening point and epoxy value. High and good process stability

Active Publication Date: 2014-11-05
建滔(广州)电子材料制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the bisphenol A type liquid epoxy resin prepared by this method has high purity, its orga

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Example 1. The preparation method of bisphenol A epoxy resin is as follows:

[0022] Add 10mol of bisphenol A and 50mol of epichlorohydrin to the reactor, and stir to completely dissolve it under the protection of nitrogen; then add 53g of 45wt% sodium hydroxide solution to the reactor, and react at a temperature of 58°C for 2h. After the pre-reaction, vacuum degree to 20kPa, 1324g of 45wt% sodium hydroxide solution was added dropwise at a temperature of 60°C to control the dropping acceleration rate of the sodium hydroxide solution to 0.4mL / min and the alkali dropping time to 2.6h. The ring-closing reaction is over, and crude bisphenol A epoxy resin is prepared. After the closed loop reaction, keep the vacuum degree of the reactor at 20kPa, increase the temperature to 80℃, and stir for 35min; after the dehydration, in the first stage, keep the vacuum degree of the reactor at 20kPa, increase the temperature to 105℃, and stir Reaction for 35min; In the second stage, the va...

Example Embodiment

[0023] Example 2. The preparation method of bisphenol A epoxy resin is as follows:

[0024] Add 10mol of bisphenol A and 60mol of epichlorohydrin to the reactor, and stir to completely dissolve it under the protection of nitrogen; then add 80g of 50wt% sodium hydroxide solution to the reactor, and react at 62°C for 3h. After the pre-reaction is over, the vacuum is drawn to 25kPa, 1512g of 50wt% sodium hydroxide solution is added dropwise at a temperature of 65°C, the dropping rate of the sodium hydroxide solution is controlled to be 0.8mL / min, and the alkali dropping time is 2.2h. The ring-closing reaction is over, and crude bisphenol A epoxy resin is prepared. After the closed loop reaction, keep the vacuum of the reactor at 25kPa, increase the temperature to 75℃, and stir for 45min; after the dehydration, in the first stage, keep the vacuum of the reactor at 25kPa, raise the temperature to 100℃, and stir. React for 45 minutes; in the second stage, reduce the vacuum of the rea...

Example Embodiment

[0025] Example 3. The preparation method of bisphenol A epoxy resin is as follows:

[0026] Add 10 mol bisphenol A and 55 mol epichlorohydrin to the reaction kettle, stir to completely dissolve under the protection of nitrogen; then add 65 g of 49wt% sodium hydroxide solution to the reaction kettle, and react at 60°C for 2.5 hours. After the pre-reaction, the degree of vacuum is drawn to 23kPa, and 1371g of 49wt% sodium hydroxide solution is added dropwise at a temperature of 64°C to control the dropping acceleration rate of the sodium hydroxide solution to 0.6mL / min and the alkali dropping time to 2.4h. The ring-closing reaction is over, and crude bisphenol A epoxy resin is prepared. After the closed loop reaction, keep the vacuum of the reactor at 23kPa, increase the temperature to 78°C, and stir for 40min; after the dehydration, in the first stage, keep the vacuum of the reactor at 23kPa, increase the temperature to 102°C, and stir. Reaction for 40 minutes; In the second sta...

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PUM

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Abstract

The invention discloses a bisphenol A epoxy resin preparation method and a product prepared therethrough. The method comprises the following steps: carrying out a pre-reaction and a ring closing reaction on raw materials comprising bisphenol A and chloropropylene oxide to prepare a crude bisphenol A epoxy resin, removing water and excess chloropropylene oxide, refining, desalinating, neutralizing through water washing, removing a solvent, and concentrating to obtain a bisphenol A epoxy resin. The preparation method has the advantages of stable process, clear parameters, detailed steps and strong feasibility; and the bisphenol A epoxy resin prepared through the preparation method has high purity, has an organic chloride content of below 0.02wt%, and has high epoxy value, high softening point and extremely good quality, so the performances of the bisphenol A epoxy resin are improved.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a bisphenol A epoxy resin and a prepared product thereof. Background technique [0002] Bisphenol A epoxy resin is also known as bisphenol A glycidyl ether epoxy resin, because of its good thermal stability, insulation, adhesion, corrosion resistance and other performance advantages, it is widely used in Coatings, adhesives, FRP, laminates, electronic casting, potting, encapsulation and other fields have become one of the most important electronic chemical materials. Bisphenol A epoxy resin is also the most widely used and the largest output in epoxy resin because of its convenient source of raw materials and low cost, accounting for more than 85% of the total output of epoxy resin. With the gradual expansion of the application of epoxy resin in high-tech fields, more stringent requirements are put forward for the heat resistance, mo...

Claims

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Application Information

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IPC IPC(8): C08G59/06
Inventor 张广军
Owner 建滔(广州)电子材料制造有限公司
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