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Anhydrous phenol formaldehyde resin and production method thereof

A technology of phenolic resin and production method, applied in the field of phenolic resin, can solve the problems of waste water polluting the environment, low water content, no solution to waste water pollution, etc., and achieves the effects of protecting the environment, reducing the cost of three-waste treatment, and avoiding the discharge of phenol-containing waste water.

Inactive Publication Date: 2009-05-06
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they all use the introduction of hydrophobic groups into the phenolic resin, and the condensation of the phenolic resin and the hydrophobic resin is used to prepare anhydrous resins with low water content. Although the water content of the resin is reduced, the problem of wastewater pollution in the production process is not solved. , did not fundamentally eliminate the problem of wastewater polluting the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] An anhydrous phenolic resin and its production method: add phenol, hexamethylenetetramine and sodium hydroxide into a reaction kettle at a molar ratio of 1 / 0.10-0.15 / 0.01-0.02, and stir at 95-100°C 2-3 hours; then add ethanol with 5-10% phenol molarity to adjust the resin viscosity, stir evenly and cool naturally.

[0011] The anhydrous phenolic resin produced in this embodiment: the solid content is 93.5-94.2%, the residual carbon is 49.9-50.3%, the moisture is less than 1%, the free phenol is less than 10.0%, the thermal decomposition temperature is as high as 503-507°C, and the resin carbon is oxidized The peak temperature is 526-537°C.

Embodiment 2

[0013] An anhydrous phenolic resin and its production method: add phenol, hexamethylenetetramine and zinc oxide into a reaction kettle at a molar ratio of 1 / 0.15-0.20 / 0.01-0.02, and stir at 75-80°C for 3 ~ 4 hours, natural cooling.

[0014] The anhydrous phenolic resin produced in this embodiment: the solid content is 95.8-96.4%, the residual carbon is 51.2-51.5%, the moisture is less than 0.8%, the free phenol is less than 8.9%, the thermal decomposition temperature is as high as 517-522°C, and the resin carbon is oxidized The peak temperature is 549-553°C.

Embodiment 3

[0016] A kind of anhydrous phenolic resin and its production method: add phenol, ethylenediaminetetraacetic acid and potassium hydroxide into the reaction kettle according to the molar ratio of 1 / 0.20~0.25 / 0.02~0.03, and stir at 70~95°C for 1 ~1.5 hours, natural cooling.

[0017] The anhydrous phenolic resin produced in this embodiment: the solid content is 98.2-98.6%, the residual carbon is 52.8-53.2%, the moisture is less than 0.7%, the free phenol is less than 8.5%, and the thermal decomposition temperature is as high as 520-524°C, and the resin carbon is oxidized The peak temperature is 555-560°C.

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PUM

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Abstract

The invention relates to an anhydrous phenolic resin and a method for producing the same. The technical proposal comprises the steps of putting phenol, nitrogen-containing compounds and basic catalysts according to the molar ratio of 1 / 0.1-0.4 / 0.01-0.05; stirring the mixture at a temperature of between 70 and 140 DEG C for 1 to 5 hours; and then adding an solvent with 5 to 25 percent of mole number of phenol to adjust the resin viscosity or adding no phenol as required, or cooling the mixture after stirring. The anhydrous phenolic resin has lower water content so as to enlarge the cross linking degree and improve the heat-resistant property of the resin, all the properties can reach the requirements for the refractory material application; the invention avoids the introduction of water due to not using formaldehyde solution as a raw material directly, so that dehydration is not needed in the production processing and the discharging of phenol-contained wastewater is avoided; at the same time that 'three wastes' treatment cost is reduced, environmental pollution is reduced and the environment is protected.

Description

technical field [0001] The invention belongs to the technical field of phenolic resins. In particular, it relates to an anhydrous phenolic resin containing nitrogen compound components and a production method thereof. Background technique [0002] Due to the easy availability of raw materials and good heat resistance, phenolic resin is widely used in carbon-containing refractory products, such as magnesium carbon, aluminum magnesium carbon, aluminum carbon, magnesium calcium carbon and other products. However, the phenolic hydroxyl group and methylene group in the ordinary phenolic resin molecule are easily oxidized, which affects its heat resistance. On the other hand, it is difficult for the resin-bonded material to form bonded carbon during actual use, so the resin-bonded material is easier to oxidize than the carbon-bonded material. For the carbonization product of phenolic resin, because phenolic resin is a typical thermosetting resin, it is carbonized in the solid ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/10
Inventor 伍林陶新易德莲冯勇
Owner WUHAN UNIV OF SCI & TECH