Method for synthesizing high-molecular-weight thermoplastic phenol resin

A technology of phenolic resin and high molecular weight, which is applied in the field of synthesis of phenolic resin by suspension method, to achieve the effects of improved heat resistance and durability, good process performance and various shapes

Inactive Publication Date: 2010-11-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to statistics, the average production of 1 ton of phenolic resin produces about 650-900 kilograms of wastewater, causing serious environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of synthetic method of high molecular weight thermoplastic phenolic resin, it comprises the steps:

[0028] 1), selection of raw materials: 200 grams of water, 25 grams of hexamethylenetetramine, 5.5 grams of gum arabic powder, 5 grams of aluminum hydroxide powder, 135 grams of phenol, 80 grams of 37wt% formaldehyde solution.

[0029] 2) Take 135 grams of phenol, 100 grams of water, and 80 grams of 37wt% formaldehyde solution, adjust the pH value to 4.5 with acetic acid with a mass concentration of 36%, add them to a stirring three-necked flask, heat in a water bath at 95°C, and react for 3.5 hours ;

[0030] 3) Then 5 gram of hexamethylenetetramine and 0.5 gram of gum arabic powder are added in the there-necked flask, after reacting for 1 hour, 5 gram of gum arabic powder and 5 gram of aluminum hydroxide powder are dissolved in 50 grams of water and join in Stir evenly in the there-necked flask, then after 5 minutes, 20 gram of hexamethylenetetramine is dissolv...

Embodiment 2

[0032] A kind of synthetic method of high molecular weight thermoplastic phenolic resin, it comprises the steps:

[0033] 1), selection of raw materials: 190 grams of water, 25 grams of hexamethylenetetramine, 5.63 grams of gum arabic powder, 5 grams of aluminum hydroxide powder, 125 grams of phenol, 100 grams of 37wt% formaldehyde solution.

[0034] 2) Take 125 grams of phenol, 110 grams of water, and 100 grams of 37wt% formaldehyde solution, adjust the pH value to 2.5 with 10% hydrochloric acid in mass concentration, add them to a stirring three-necked flask, heat in a water bath at 93°C, and react for 4 hours;

[0035] 3) Then 5 gram of hexamethylenetetramine and 0.63 gram of gum arabic powder are added in the there-necked flask, after reacting for 1 hour, 5 gram of gum arabic powder and 5 gram of aluminum hydroxide powder are dissolved in 40 grams of water and join in Stir evenly in the three-necked flask, then after 5 minutes, 20 gram of hexamethylenetetramine is dissolve...

Embodiment 3

[0037] A kind of synthetic method of high molecular weight thermoplastic phenolic resin, it comprises the steps:

[0038] 1), selection of raw materials: 180 grams of water, 25 grams of hexamethylenetetramine, 6.1 grams of gum arabic powder, 4 grams of aluminum hydroxide powder, 105 grams of phenol, 110 grams of 37wt% formaldehyde solution.

[0039] Take 105 grams of phenol, 80 grams of water, and 110 grams of 37wt% formaldehyde solution, adjust the pH value to 4 with oxalic acid, add them to a stirring three-necked flask, heat in a water bath at 90°C, and react for 5 hours;

[0040] 3) Then 5 gram of hexamethylenetetramine and 0.65 gram of gum arabic powder are added in the there-necked flask, after reacting for 1 hour, 5.45 gram of gum arabic powder and 4 gram of aluminum hydroxide powder are dissolved in 50 grams of water and join in Stir evenly in the there-necked flask, then after 5 minutes, 20 gram of hexamethylenetetramine is dissolved in 50 gram of water and it is adde...

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PUM

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Abstract

The invention relates to a method used for sp synthesis of phenolic resin. A synthesis method for thermoplastic phenolic resin of high molecular weight is characterized in that the invention comprises four following steps: 1) the selection of raw materials: the weight portion of each raw materials: water: 50 to 250, phenol: 90 to 160, formaldehyde liquid: 60 to 120, hexamethylene tetramine:15 to 35, gum Arabic powder: 3 to 10, aluminum oxide powder:2 to 8, the mass concentration of the formaldehyde liquid is 37 percents. 2) some water, the phenol and the formaldehyde liquid are taken and added to a stirring reaction vessel, and the reaction time is ranging from three hours to five hours after adjusting pH value to 2 to 5 and increasing the temperature to 85 DEG C to 95 DEG C. 3) some gum Arabic powder and some hexamethylene tetramine are uniformly mixed, the remained gum Arabic powder and the aluminum oxide powder are added after the reaction time ranging from a half hour to one and ahalf hours and uniformly mixed with the water, and the remained hexamethylene tetramine is dissolved in the some water and is added into the reaction vessel after five minutes to 30 minutes, the heating is stopped after the reaction time ranging from 25 minutes to 40 minutes, and the temperature of a reactor is decreased to the room temperature. 4) the product is obtained after water washing, filtering and drying. The product obtained by the synthesis method has the advantages of high molecular weight, high heat-resistance, high toughness; the technique is simple and the cost is low.

Description

technical field [0001] The invention relates to a method for synthesizing phenolic resin by a suspension method. Background technique [0002] Phenolic resin is the first synthetic resin to be industrialized in the world, and it has a history of nearly a hundred years so far. The raw material is easy to obtain, the cost is low, and the cured product has good heat resistance and mechanical properties, and the performance is stable. Therefore, phenolic resin has gradually replaced engineering plastics and some metal and alloy materials in many fields such as automobiles, electronics, electricity, transportation, and military affairs, and has been widely used. The solid content of phenolic resin synthesized by the traditional formaldehyde solution method is generally 50% to 55%. The dehydration or drying process not only produces a large amount of wastewater containing phenol, aldehyde, and alcohol, but also increases production energy consumption and reduces labor efficiency...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/10
Inventor 王勇邓雷邢凯华陈斌张联盟
Owner WUHAN UNIV OF TECH
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