Alkali-resistant boron-modified phenolic resin and preparation method thereof

A phenolic resin, boron modification technology, applied in the field of resin products, can solve problems such as poor alkali resistance, and achieve the effect of improving alkali resistance and expanding applications

Active Publication Date: 2019-03-22
SHANGHAI INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The reason why ordinary phenolic resin has poor alkali resistance is that the hydroxyl group in the structure is directly connected to the benzene ring. Due to the conjugation effect, the unshared electron pair on the oxygen atom moves to the benzene ring, making the hydrogen atom easy to form H + , it reacts with OH in alkaline solution - Therefore, how to improve the alkali resistance of phenolic resin has become a hot field and has high research value.

Method used

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  • Alkali-resistant boron-modified phenolic resin and preparation method thereof
  • Alkali-resistant boron-modified phenolic resin and preparation method thereof
  • Alkali-resistant boron-modified phenolic resin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] In the embodiment of the present invention, a control CO 2 The time of feeding is obtained boron modified phenolic resin, and its raw material comprises phenol, formaldehyde and borax, wherein adds phenol 0.1mol, formaldehyde 0.16mol and borax 0.75g.

[0021] A CO based control 2 The time of feeding obtains the preparation method of boron modified phenolic resin, and concrete steps are as follows:

[0022] (1) Add phenol and formaldehyde in a three-necked flask equipped with an electric stirrer, a reflux condenser, and a thermometer, and turn on the electric stirrer to stir evenly;

[0023] (2) When the water bath of the reaction device is heated to 90°C, ammonia water is added to adjust the pH to 8.0, and the solution is kept at a temperature of 90-100°C for 2 hours;

[0024] (3) Reflux and condense the insulated three-neck flask with cold water to 50°C, then add a certain amount of borax, and at the same time, feed CO at 50ml / min for 6min. 2 Dehydration under reduc...

Embodiment 2

[0027] In the embodiment of the present invention, a control CO 2 The time of feeding is obtained boron modified phenolic resin, and its raw material comprises phenol, formaldehyde and borax, wherein adds phenol 0.1mol, formaldehyde 0.16mol and borax 0.75g.

[0028] A CO based control 2 The time of feeding obtains the preparation method of boron modified phenolic resin, and concrete steps are as follows:

[0029] (1) Add phenol and formaldehyde in a three-necked flask equipped with an electric stirrer, a reflux condenser, and a thermometer, and turn on the electric stirrer to stir evenly;

[0030] (2) When the water bath of the reaction device is heated to 90°C, ammonia water is added to adjust the pH to 8.0, and the solution is kept at a temperature of 90-100°C for 2 hours;

[0031] (3) Reflux and condense the insulated three-neck flask with cold water to 50°C, then add a certain amount of borax, and at the same time, feed CO at 50ml / min for 7min. 2 Dehydration under reduc...

Embodiment 3

[0034] In the embodiment of the present invention, a control CO 2 The time of feeding is obtained boron modified phenolic resin, and its raw material comprises phenol, formaldehyde and borax, wherein adds phenol 0.1mol, formaldehyde 0.16mol and borax 0.75g.

[0035] A CO based control 2 The time of feeding obtains the preparation method of boron modified phenolic resin, and concrete steps are as follows:

[0036] (1) Add phenol and formaldehyde in a three-necked flask equipped with an electric stirrer, a reflux condenser, and a thermometer, and turn on the electric stirrer to stir evenly;

[0037] (2) When the water bath of the reaction device is heated to 90°C, ammonia water is added to adjust the pH to 8.0, and the solution is kept at a temperature of 90-100°C for 2 hours;

[0038] (3) Reflux and condense the insulated three-neck flask with cold water to 50°C, then add a certain amount of borax, and at the same time, feed CO at a rate of 50ml / min for 8min. 2 Dehydration u...

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Abstract

The invention discloses alkali-resistant boron-modified phenolic resin and a preparation method thereof. The preparation method of the alkali-resistant boron-modified phenolic resin comprises the following steps of: firstly reacting phenol with formaldehyde and a catalyst in a three-necked flask, heating and uniformly stirring, then adding cold water and condensing, and finally adding borax and introducing CO2 gas to obtain alkali-resistant boron-modified phenolic resin. According to the alkali-resistant boron-modified phenolic resin and the preparation method thereof, CO2 is introduced into alkali-resistant boron-modified phenolic resin, the alkalinity of an alkaline phenolic resin system is reduced, so that the resin system is changed from alkalinity to weak acidity; borax is changed into boric acid and can be further reacted with resin, so that the contents of phenolic hydroxyl and hydroxymethyl in the phenolic resin can be greatly reduced; the prepared boron-modified phenolic resinis soaked in an alkaline solution; compared with the conventional resin, the measured alkali resistance of the phenolic resin is obviously improved; the disadvantage that the common modified phenolicresin is not easily controlled is also overcome; the application of the phenolic resin is expanded.

Description

technical field [0001] The invention relates to the technical field of resin products, in particular to an alkali-resistant boron-modified phenolic resin and a preparation method thereof. Background technique [0002] Phenolic resin is the earliest resin synthesized by humans and used in industrial production. It has a history of more than 100 years. It is a type of thermally reactive oligomer formed through polycondensation reaction with aldehydes and phenolic compounds as the main raw materials. This type of polymer first obtains a liquid resin with a relatively low viscosity under certain reaction conditions, and then continues to react under certain conditions to obtain a cured product. Phenolic resin is cheap because of its synthetic raw materials, simple production process, less investment in manufacturing and processing equipment, and its products are easy to process and shape, with excellent heat resistance, flame retardancy, friction resistance, corrosion resistance...

Claims

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Application Information

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IPC IPC(8): C08G8/28
CPCC08G8/28
Inventor 孟凡帅刘倩周迪王磊李书珍
Owner SHANGHAI INSTITUTE OF TECHNOLOGY
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