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Synthesis method of phenoxy resin

A technology of phenolic resin and synthesis method, applied in the field of phenolic resin synthesis, can solve the problems of inability to mass production, high viscosity of phenolic resin, and high equipment requirements, and achieves improved flexibility, low equipment requirements, and high viscosity. low effect

Active Publication Date: 2016-10-05
NINGBO ZHETIE JIANGNING CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two-step method can obtain higher molecular weight and better quality phenolic resins, but the phenolic resins produced by the existing two-step process have high viscosity and poor fluidity, and are generally synthesized in an extruder; due to its It is difficult to discharge the material, so it cannot be synthesized in a commonly used tank reactor, and the equipment requirements are very high, resulting in the inability to mass produce on a large scale

Method used

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  • Synthesis method of phenoxy resin
  • Synthesis method of phenoxy resin
  • Synthesis method of phenoxy resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A kind of synthetic method of phenolic resin, comprises the steps:

[0046] 1), add bisphenol A type epoxy resin, BPA to the tank reactor that is provided with thermometer, agitator, condensation tube under nitrogen condition and mix evenly, add bisphenol A in the tank reactor Type epoxy resin and the anisole of BPA gross mass 15%, be warming up to material dissolution.

[0047] The ratio of the bisphenol A epoxy resin to BPA is: the molar ratio of the epoxy group in the bisphenol A epoxy resin to the phenolic hydroxyl group in the BPA is 1.065:1. Among them, the bisphenol A epoxy resin adopts YN1828 / YN1826 of Yangnong, and the BPA adopts the product produced in Changchun, Taiwan.

[0048] 2) Add a bisphenol A type epoxy resin and a catalyst with a total mass of 0.25% of BPA to the tank reactor, and conduct a polymerization reaction at 145° C. for 5 hours.

[0049] The preparation method of the catalyst is as follows: mixing 5.5wt% of 2-methylimidazole and 94.5wt% but...

Embodiment 2

[0054]A kind of synthetic method of phenolic resin, comprises the steps:

[0055] 1), add bisphenol A type epoxy resin, BPA to the tank reactor that is provided with thermometer, agitator, condensation tube under nitrogen condition and mix evenly, add bisphenol A in the tank reactor Type epoxy resin and the anisole of BPA gross mass 10%, be warming up to material dissolution.

[0056] The ratio of the bisphenol A epoxy resin to BPA is: the molar ratio of the epoxy group in the bisphenol A epoxy resin to the phenolic hydroxyl group in the BPA is 1.01:1.

[0057] 2) Add a bisphenol A type epoxy resin and a catalyst with a total mass of 0.1% of BPA to the tank reactor, and conduct a polymerization reaction at 120° C. for 8 hours.

[0058] The preparation method of the catalyst is as follows: mixing 2-methyl-4-ethylimidazole accounting for 1wt% of the total amount with butanone accounting for 99wt% of the total amount, stirring and dissolving at normal temperature.

[0059] 3), ...

Embodiment 3

[0063] A kind of synthetic method of phenolic resin, comprises the steps:

[0064] 1), add bisphenol A type epoxy resin, BPA to the tank reactor that is provided with thermometer, agitator, condensation tube under nitrogen condition and mix evenly, add bisphenol A in the tank reactor Type epoxy resin and the anisole of BPA gross mass 20%, be warming up to material dissolution.

[0065] The ratio of the bisphenol A epoxy resin to BPA is: the molar ratio of the epoxy group in the bisphenol A epoxy resin to the phenolic hydroxyl group in the BPA is 1.12:1.

[0066] 2), add bisphenol A type epoxy resin and the catalyst of 0.4% of total mass of BPA in the tank reactor, heat up to 170 ℃, polymerization reaction 2h; During the reaction, add bisphenol A type epoxy resin and A mixed solvent of propylene glycol methyl ether and butanone with a total mass of BPA of 28%.

[0067] The preparation method of the catalyst is as follows: 10 wt% of the total amount of 2-methylimidazole is mix...

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Abstract

The invention discloses a synthesis method of a phenoxy resin. The method comprises the following steps: 1) uniformly mixing a bisphenol A epoxy resin and BPA (bisphenol A) in a tank reactor, adding an ether solvent or ketone solvent, and heating until the materials are dissolved; 2) adding a catalyst, and heating to react; 3) when the molecular weight of the reaction product reaches 28000-32000, adding a mixed solvent into the tank reactor at uniform speed within 2-5 hours; and 4) filtering and discharging to obtain the phenoxy resin. The phenoxy resin prepared by the method has the advantages of favorable flowability, low viscosity and low facility requests, can perform reaction in the tank reactor, and is suitable for large-scale production. The phenoxy resin has moderate molecular weight, is suitable for participating in blending, and is used as a modifier for plastics, adhesives, paints and other resins. The added phenoxy resin can improve the flexibility of the curing system, lower the stretch modulus of the curing system and enhance the elongation percentage.

Description

technical field [0001] The invention relates to the field of synthesizing phenoxy resins, in particular to a method for synthesizing phenoxy resins. Background technique [0002] Phenoxy resin is a thermoplastic resin that can be used alone without a curing agent. Its epoxy group content is very small and its hydroxyl value is large, mainly relying on the polarity of the hydroxyl group to produce strong adhesion to substrates such as metals. Because of the bulky benzene ring around the hydroxyl group, it still has good water resistance. High-molecular-weight phenolic resin has excellent physical properties such as high mechanical strength, good toughness, wear resistance, and small shrinkage, so it is widely used in coatings, injection molding materials, adhesives, and copper-clad laminates. [0003] In recent years, the field of use of phenolic resin has been continuously expanded, the amount of use has increased, and the market price has continued to rise. However, ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28
CPCC08G65/2612C08G65/2672C08G65/2675
Inventor 侯新宇刘凤菊毛明强管素萍黄军
Owner NINGBO ZHETIE JIANGNING CHEM
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