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Method for producing phenol resin

A technology for a phenolic resin and a production method, applied in the field of high molecular organic compounds, can solve the problems of difficult application and reprocessing of phenolic resin, unstable storage of phenolic resin, long curing time of phenolic resin, etc., and achieves enhanced ortho-position reaction and can be stored. Extended time, high solids effect

Inactive Publication Date: 2008-05-14
湖南中野高科技特种材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional synthetic production method of phenolic resin uses phenol, industrial formaldehyde, acidic catalyst or basic catalyst, etc., and puts it into the reaction equipment at a certain ratio, and then synthesizes it according to a certain process. The phenolic resin produced by the reaction has a long curing time. The activity is low, and the storage of finished phenolic resin is unstable, which causes certain difficulties in the application and reprocessing of phenolic resin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1), backup raw materials according to the following weight ratio: 360 grams of phenol, 500 grams of formaldehyde, 1.8 grams of zinc acetate, 1.8 grams of barium hydroxide, 40 grams of xylene, 20 grams of urea;

[0013] (2), the prepared phenol, zinc acetate and dimethylbenzene of step (1) are all dropped in the reactor. Then 60% of the prepared formaldehyde portion of step (1) is dropped into the reactor. Heat up to 80°C. When the temperature reaches 80°C, the heating rate is controlled at 1°C per minute, and the temperature is raised to 105°C and kept for 90 minutes;

[0014] (3) Monitor the refractive index of the materials in the reactor. When the refractive index reaches 1.45-1.50, all the barium hydroxide and the remaining formaldehyde prepared in step (1) are put into the reaction kettle, and the temperature is controlled above 85°C. Raise the temperature at a rate of 1°C per minute, raise the temperature to 100°C, and keep it for 50 minutes;

[0015] (4) Con...

Embodiment 2

[0018] (1), backup raw materials according to the following weight ratio: 370 kg of phenol, 520 kg of formaldehyde, 2.0 kg of zinc acetate, 2.0 kg of barium hydroxide, 42 kg of xylene, 24 kg of urea;

[0019] Steps (2)~(3) are the same as in Example 1;

[0020] (4) Conventional resinization degree detection method detects the obtained substances in the reaction kettle. When the milk cloud point was measured at 52°C, the material was subjected to conventional dehydration treatment. After the dehydration treatment, cool down to 70°C, add the urea prepared in step (1) into the reaction kettle, stir evenly, and naturally cool down to 50°C to obtain the finished phenolic resin.

[0021] The test results of the finished resin product obtained in this example show that: the solid content of the finished product is 82.5%; the dropping point is 72°C; the gel time is 59s; the initial viscosity is 3200cps, the viscosity after 48 hours is 3400cps, and the viscosity after 96 hours is 3500...

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Abstract

The invention discloses a production method of phenolic resin, which is characterized in that the materials and the step comprise: (1) backup phenol, formaldehyde, zinc acetate, barium hydroxide, xylene, and urea, (2) 60 percent of the quantity of phenol, zinc acetate, xylene, and formaldehyde are put into the reaction kettle and warmed up to 105 DEG C for 90 minutes, (3) monitoring of index of refraction, the barium hydroxide and the residual formaldehyde are put into the reaction kettle as index of refraction up to 1.45 to 1.50, warmed up to 100 to 102DEG C for 50 to 60 minutes, (4) resinification degree detection, dewater treatment is performed at opaque point of 50 to 52 DEG C, the urea is put into the reaction kettle as the temperature is decreased to 70 DEG C, and the finished product is generated as the temperature is generated to 50 DEG C. The invention has the advantages of reinforced ortho position reaction of the phenolic resin, strengthened activity of the phenolic resin, high solid content, low viscosity, long storage time, and elimination of low activity in process of the phenolic resin production.

Description

technical field [0001] The invention relates to a production process of phenolic resin, which belongs to the technical field of high molecular organic compounds. Background technique [0002] Existing phenolic resins have good acid resistance, alkali resistance and thermal insulation properties, and are widely used in the fields of chemical industry, military affairs and building materials. The traditional synthetic production method of phenolic resin uses phenol, industrial formaldehyde, acidic catalyst or basic catalyst, etc., and puts it into the reaction equipment at a certain ratio, and then synthesizes it according to a certain process. The phenolic resin produced by the reaction has a long curing time. The activity is low, and the storage of the finished phenolic resin is unstable, which causes certain difficulties in the application and reprocessing of the phenolic resin. Contents of the invention [0003] The technical problem to be solved in the present inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/10
Inventor 杨建中
Owner 湖南中野高科技特种材料有限公司
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