Boron modified phenolic resin and preparation method thereof

A phenolic resin and boron modification technology, applied in the field of boron modified phenolic resin and its preparation, can solve the problem that boron element affects heat resistance, ablation resistance and mechanical properties, etc., and achieves significant economic and social benefits, good Heat resistance, wide application effect

Active Publication Date: 2012-07-25
沙县宏盛塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current research mainly focuses on the special properties and synthesis of boron-modified phenolic resins. How to prepare modified phenolic resins with different boron content according to the performance requirements, and how the specific influence of boron content on modified phenolic resins is. However, the content of boron in the boron modified phenolic resin structure directly affects its heat resistance, ablation resistance and mechanical properties.

Method used

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  • Boron modified phenolic resin and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Feed according to the molar ratio of phenol and formaldehyde as 1:0.79, and weigh oxalic acid with a phenol mass of 7‰ as a catalyst, heat up to 95°C while stirring, and react for 3 hours;

[0016] 2) Adjust the vacuum degree of the reactor to 0.06MPa, and carry out dehydration under reduced pressure;

[0017] 3) Continue to heat up. When the temperature of the reaction solution rises to 120°C, add boric acid with 2% phenol mass, continue the reaction and raise the temperature to 140°C, and keep it warm for 1h;

[0018] 4) Adjust the vacuum degree of the reactor to 0.04MPa, and perform the second dehydration under reduced pressure;

[0019] 5) Continue to heat up, and discharge when the reaction temperature reaches 180°C.

Embodiment 2

[0021] 1) Feed according to the molar ratio of phenol and formaldehyde as 1:0.79, and weigh oxalic acid with a phenol mass of 7‰ as a catalyst, heat up to 100°C while stirring, and react for 5 hours;

[0022] 2) Adjust the vacuum degree of the reactor to 0.07MPa, and carry out dehydration under reduced pressure;

[0023] 3) Continue to heat up. When the temperature of the reaction solution rises to 130°C, add boric acid with 5% phenol mass, continue the reaction and raise the temperature to 140°C, and keep it warm for 1h;

[0024] 4) Adjust the vacuum degree of the reactor to 0.04MPa, and perform the second dehydration under reduced pressure;

[0025] 5) Continue to heat up, and discharge when the reaction temperature reaches 180°C.

Embodiment 3

[0027] 1) Feed according to the molar ratio of phenol and formaldehyde as 1:0.79, and weigh oxalic acid with a phenol mass of 7‰ as a catalyst, heat up to 98°C while stirring, and react for 4 hours;

[0028] 2) Adjust the vacuum degree of the reactor to 0.065MPa, and carry out dehydration under reduced pressure;

[0029] 3) Continue to heat up. When the temperature of the reaction solution rises to 125°C, add boric acid with 4% phenol mass, continue the reaction and raise the temperature to 140°C, and keep it warm for 1h;

[0030] 4) Adjust the vacuum degree of the reactor to 0.04MPa, and perform the second dehydration under reduced pressure;

[0031] 5) Continue to heat up, and discharge when the reaction temperature reaches 180°C.

[0032] The high temperature resistance of the boron modified phenolic resin prepared by the invention is better than that of common phenolic resin. Comparison of thermal weight loss between boron modified phenolic resin and common phenolic resi...

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Abstract

The invention discloses boron modified phenolic resin and a preparation method thereof. The boron modified phenolic resin is made of, by weight, 80-90 parts of phenol, 55-65 parts of formaldehyde, 0.5-0.6 part of oxalic acid and 3-5 parts of boric acid by means of feeding, refluxing, emulsifying, primary dewatering, adding oxalic acid, secondary dewatering and discharging. The preparation method is simple, and the boron modified phenolic resin made by the method has high heat resistance, ablation resistance and mechanical performance, is wide in application range and has remarkable economic and social benefits.

Description

technical field [0001] The invention belongs to the field of modified polymers, and in particular relates to a boron-modified phenolic resin and a preparation method thereof. Background technique [0002] Phenolic resin has excellent mechanical properties, heat resistance, ablation resistance, electrical insulation, dimensional stability, molding processability and flame retardancy. Phenolic resin has become an indispensable material in the industrial sector, in the fields of aircraft and aviation, It has been widely used in military equipment field, automobile and transportation industry, construction industry and so on. However, with the development of industry, especially the development of aerospace and other cutting-edge defense technologies, the shortcomings of traditional unmodified phenolic resins such as high brittleness, poor toughness and poor heat resistance limit the development of high-performance materials. Therefore, modifying the phenolic resin to improve i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/28
Inventor 罗建峰陈银桂朱光明卢俊琳曾丽丽
Owner 沙县宏盛塑料有限公司
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