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A kind of preparation method of modified phenolic resin

A phenolic resin and modification technology, which is applied in the chemical field, can solve the problems of complex process and easy pollution of the modified phenolic resin, and achieve the effects of cost reduction and technological progress.

Inactive Publication Date: 2019-12-13
ANHUI MEIDONG BIOLOGICAL MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of preparation method of modified phenolic resin, the preparation method of described this modified phenolic resin will solve the technical problem of preparing modified phenolic resin in the prior art that the technology is complicated, easy to pollute the environment

Method used

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  • A kind of preparation method of modified phenolic resin
  • A kind of preparation method of modified phenolic resin
  • A kind of preparation method of modified phenolic resin

Examples

Experimental program
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Effect test

Embodiment 1

[0028] 300 grams of heavy phase, 1 gram of urotropine, 21 grams of polyoxymethylene, 4 grams of ethylenediamine, and 30 grams of xylene, add the heavy phase, urotropine, ethylenediamine, and xylene to the reaction bottle, and heat to 50-60°C, add polyoxymethylene in batches, after adding, raise the temperature to 85-95°C, keep it warm for 1 hour, raise the temperature and dehydrate to about 105°C, then vacuum dehydrate, gradually increase the vacuum degree to 0.095MPa, and dehydrate to 120-130°C Keep it for about 30 minutes, add 50 grams of xylene so that the solid content of the resin is between 80% and 90%, stir evenly, and filter out the material. The viscosity is 1972mPa·s, the solid content is 82%, and the yield is 94.18%.

Embodiment 2

[0030] 300 grams of heavy phase, 4 grams of urotropine, 30 grams of polyoxymethylene, 2 grams of ethylenediamine, 50 grams of xylene, add heavy phase, urotropine, ethylenediamine, and xylene in the reaction bottle, and heat to 50-60°C, add polyoxymethylene in batches, after adding, raise the temperature to 85-95°C, keep it warm for 1 hour, raise the temperature and dehydrate to about 105°C, then vacuum dehydrate, gradually increase the vacuum degree to 0.095MPa, and dehydrate to 120-130°C Keep it for about 30 minutes, add 50 grams of xylene so that the solid content of the resin is between 80% and 90%, stir evenly, and filter out the material. The viscosity is 3350mPa·s, the solid content is 89.77%, and the yield is 93.58%.

Embodiment 3

[0032] 300 grams of heavy phase, 4 grams of urotropine, 45 grams of polyoxymethylene, 4 grams of ethylenediamine, and 80 grams of xylene, add heavy phase, urotropine, ethylenediamine, and xylene to the reaction bottle, and heat to 50-60°C, add polyoxymethylene in batches, after adding, raise the temperature to 85-95°C, keep it warm for 1 hour, raise the temperature and dehydrate to about 105°C, then vacuum dehydrate, gradually increase the vacuum degree to 0.095MPa, and dehydrate to 120-130°C Keep it for about 30 minutes, add 50 grams of xylene so that the solid content of the resin is between 80% and 90%, stir evenly, and filter out the material. The viscosity is 3050mPa·s, the solid content is 89.567%, and the yield is 95.58%.

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Abstract

The invention discloses a preparation method of modified phenolic resin. The method comprises the steps of weighing a heavy phase, polyformaldehyde, urotropine, ethidene diamine and dimethylbenzene according to the material ratio, adding the heavy phase to a reaction container and heating urotropine, ethidene diamine and 30-70% dimethylbenzene to 50-60 DEG C; adding polyformaldehyde in 2-5 batches, heating the raw materials to 85-95 DEG C, carrying out heat preservation for 0.5-2 hours, carrying out heating and dewatering until the temperature is 100-110 DEG C; carrying out dewatering under the condition that the vacuum degree is 0.05-0.1MPa and keeping under the condition of 120-130 DEG C for 20-40 minutes; and adding the balance of dimethylbenzene, stirring evenly, filtering and discharging the materials to obtain the modified phenolic resin. The preparation method is renewable pure plant extraction, and environmentally friendly, and can be applied to the phenolic resin instead of a petroleum extract phenol.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to a phenolic resin, in particular to a preparation method of a modified phenolic resin. Background technique [0002] Modified phenolic resin is a phenolic resin modified by chemical or physical methods (such as copolymerization or mechanical mixing) with different compounds or polymers, including polyamide modified phenolic resin, dicyandiamide modified phenolic resin, epoxy Modified phenolic resin, polyvinyl acetal modified phenolic resin, etc. After modification, the impact toughness, adhesiveness, mechanical strength, heat resistance, flame retardancy, dimensional stability, curing speed and molding process of phenolic resin are improved respectively. Therefore, different modified phenolic resins can be selected according to the actual application. A phenolic resin whose properties are changed by the action of rosin, drying oil and fatty acid. It can change from insoluble or insolub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/28C08G8/08
CPCC08G8/08C08G8/28
Inventor 毕丽杰宋学良
Owner ANHUI MEIDONG BIOLOGICAL MATERIAL
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