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Environmentally friendly rosin modified phenolic resin and preparation method thereof

A technology for modifying phenolic resin and rosin, which is applied in the field of environmentally friendly rosin modified phenolic resin and its preparation, to avoid formaldehyde pollution and to achieve excellent use effects

Inactive Publication Date: 2019-11-12
刘伟俊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcoming of prior art, provide a kind of production formaldehyde-free rosin modified phenolic resin and preparation method thereof, reduce the pollution problem of formaldehyde in the application process of phenolic resin product, improve the environmental protection of rosin modified phenolic resin characteristic

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] An environmentally friendly rosin modified phenolic resin, which is oxidized by 15%-25% starch in 0.2%-2% acidic oxidant, so that the starch is fully oxidized and all molecules contain aldehyde groups, and then mixed with 15%-30% Alkylphenol is reacted at a temperature of 50°C-100°C to obtain an alkylphenol-formaldehyde resin condensate, and then 3-8% of rosin epoxy compound and alkylphenol-formaldehyde resin condensate are subjected to carboxylic acid reaction to obtain a modified formaldehyde-free novolac The resin mixture is finally prepared by esterifying 2%-10% of pentaerythritol.

Embodiment 2

[0019] A kind of preparation method of environmental protection rosin modified phenolic resin, comprises the following steps:

[0020] S1. Add water with a mass ratio of 40% and starch with a mass ratio of 15% to a water bath heating pot equipped with a mixer and a thermometer, heat and stir for about 2 hours, control the temperature at 60°C-75°C, and add 2% of 30% super Oxidation of hydrogen, oxidation reaction for half an hour, to obtain compounds containing aldehyde groups;

[0021] S2, then control the temperature at 65°C-100°C, slowly add 15% of alkylphenol, 2% of accelerator M, keep warm and stir for 1-2 hours, terminate the reaction, and then the alkylphenol-formaldehyde resin compound can be prepared;

[0022] S3. Put the rosin epoxy compound of 3 into the reaction kettle, heat up to 180°C, continue to heat up to 210-265°C and keep warm for 1.5-2h to carry out the addition reaction, add 0.5% catalyst ZnO, the addition reaction is at 170-220°C ℃, the reaction time is 2...

Embodiment 3

[0026] A kind of preparation method of environmental protection rosin modified phenolic resin, comprises the following steps:

[0027] S1. Add water with a mass ratio of 60% and starch with a mass ratio of 25% to a water bath heating pot equipped with a mixer and a thermometer, and heat and stir for about 2 hours. Oxidation of hydrogen, oxidation reaction for half an hour, to obtain compounds containing aldehyde groups;

[0028] S2, then control the temperature at 65°C-100°C, slowly add 30% alkylphenol, 5% accelerator M, heat and stir for 1-2 hours, terminate the reaction, and then the alkylphenol-formaldehyde resin compound can be prepared;

[0029] S3. Put 8% rosin epoxy compound into the reaction kettle, heat up to 180°C, continue to heat up to 210-265°C and keep warm for 1.5-2h for addition reaction, 5% catalyst ZnO, addition reaction at 170-220 ℃, the reaction time is 2 to 3 hours, and a modified formaldehyde-free phenolic resin mixture is obtained;

[0030] S3. Put 10%...

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Abstract

The invention discloses environmentally friendly rosin modified phenolic resin, which is prepared by oxidizing starch with an acidic oxidant so that the starch is fully oxidized and contains an aldehyde group in molecules; then reacting the starch with alkylphenol at 50-100 DEG C to obtain an alkylphenol-formaldehyde resin condensation compound; then subjecting a rosin epoxy compound and the condensation compound to a carboxylic acid reaction to obtain a modified formaldehyde-free phenolic resin mixture; and performing esterification with pentaerythritol. Through oxidation of the starch in theacidic oxidant, the starch is fully oxidized and contains an aldehyde group in molecules, and then the starch reacts with the alkylphenol at 50-100 DEG C to obtain the alkylphenol-formaldehyde resincondensation compound. With respect to a preparation method, formaldehyde is removed from the source of phenolic resin preparation, thus avoiding formaldehyde pollution and meeting environment protection requirements.

Description

technical field [0001] The invention relates to the field of environment-friendly materials, in particular to an environment-friendly rosin-modified phenolic resin and a preparation method thereof. Background technique [0002] Phenolic resin is a general term for resins formed by phenols and aldehydes under the action of catalysts. In the field of wood processing, phenolic resin is one of the main types of glue widely used, its consumption is second only to urea-formaldehyde resin, especially in the production of water-resistant and weather-resistant wood products, phenolic resin has special significance, phenolic resin adhesive has heat resistance Good, high bonding strength, good aging resistance, excellent electrical insulation, and cheap and easy to use, so it has been widely used; advantages: large polarity, strong adhesion; high rigidity, heat resistance High; good aging resistance; water resistance, oil resistance, chemical medium resistance, mold resistance; easy t...

Claims

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Application Information

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IPC IPC(8): C08G8/34C08G8/28C08B31/18
CPCC08B31/18C08G8/28C08G8/34
Inventor 林文丹刘伟俊李刚黄明辉张占中林文滨
Owner 刘伟俊
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