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Method for producing modified phenolic resin

A technology of phenolic resin and production method, which is applied in the field of chemical resin, can solve problems such as poor strength of phenolic resin, and achieve the effect of excellent strength and high use demand

Inactive Publication Date: 2015-09-02
GUANGXI ZHONGCHANG RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to provide a kind of production method of modified phenolic resin, the production method of this modified phenolic resin can solve the problem of poor strength of phenolic resin

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0016] The production method of the modified phenolic resin of this embodiment is characterized in that it includes the following steps: adding phenol and formaldehyde to the reaction kettle, mixing uniformly, and keeping warm; adding ethylene propylene rubber and zinc acetate in sequence, keeping the temperature and standing, and finally adding the magnesium oxide catalyst , Gradually increase the temperature to 70°C, and when the viscosity of the reaction product is 2 Pascals, stop the reaction, filter, and remove the catalyst; among them, the mass ratio of phenol, formaldehyde, ethylene-propylene rubber, crosslinking agent and catalyst is 1:1.5: 0.5:0.05:0.05.

Embodiment 2

[0018] The production method of the modified phenolic resin of this embodiment is characterized by including the following steps: adding cresol and formaldehyde into the reaction kettle, mixing uniformly, and keeping warm; adding ethylene-propylene rubber and zinc acetate in sequence, keeping the temperature and standing still, and finally adding magnesium oxide The catalyst is gradually heated to 75°C. When the viscosity of the reaction product reaches 3 Pascals, stop the reaction, filter, and remove the catalyst; the mass ratio of cresol, formaldehyde, ethylene-propylene rubber, crosslinking agent and catalyst is 1: 2: 0.2: 0.1: 0.08.

Embodiment 3

[0020] The production method of the modified phenolic resin of this embodiment is characterized in that it includes the following steps: adding phenol and formaldehyde to the reaction kettle, mixing uniformly, and keeping warm; adding ethylene propylene rubber and zinc acetate in sequence, keeping the temperature and standing, and finally adding the magnesium oxide catalyst , Gradually increase the temperature to 80°C, and when the viscosity of the reaction product is 2.5 Pascals, stop the reaction, filter, and remove the catalyst; among them, the mass ratio of phenol, formaldehyde, ethylene-propylene rubber, crosslinking agent and catalyst is 1:2.5: 0.8: 0.2: 0.1.

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Abstract

The invention discloses a method for producing modified phenolic resin. The method comprises the following steps: adding phenol and formaldehyde into a reaction kettle, uniformly mixing, and keeping the temperature; sequentially adding ethylene propylene rubber and a cross-linking agent, keeping the temperature, standing still, finally adding a catalyst, heating step by step, stopping the reaction when the viscosity of the reaction product is 2-3 Pascal.second, and filtering so as to remove the catalyst, wherein the mass ratio of phenol to formaldehyde to ethylene propylene rubber to the cross-linking agent to the catalyst is 1:(1.5-2.5):(0.2-0.8):(0.05-0.2):(0.05-0.1). According to the method for producing modified phenolic resin, as ethylene propylene rubber and the cross-linking agent are added into a mixed solution of phenol and formaldehyde, and magnesium oxide is taken as the catalyst, the modified phenolic resin is excellent in strength, toughness and flame retardancy, and relatively high use requirements can be met.

Description

Technical field [0001] The invention relates to the technical field of chemical resins, in particular to a production method of modified phenolic resin. Background technique [0002] Phenolic resin is the first synthetic resin to be industrialized. Because of its good mechanical properties, cold resistance, electrical insulation, and molding processability, it has become an indispensable material in various industrial sectors and has a very wide range of uses. However, the weakness of phenolic resin is its poor strength and toughness, and it is difficult to use large-scale continuous production to meet the needs of the broad market. Therefore, people have been committed to its modification research, hoping to produce a modified phenolic resin with ideal strength. Summary of the invention [0003] The purpose of the present invention is to provide a production method of modified phenolic resin, which can solve the problem of poor strength of phenolic resin. [0004] In order to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/28
Inventor 林琳
Owner GUANGXI ZHONGCHANG RESIN
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