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Thermosetting environment-friendly phenolic resin and manufacturing method thereof

An environmentally friendly phenolic resin, thermosetting technology, used in manufacturing tools, casting molding equipment, metal processing equipment, etc., can solve the problems of low casting quality, large natural resources, consumption, etc., to reduce waste sand discharge, high molding sand strength, reduce cost effect

Active Publication Date: 2012-08-15
NINGBO JINHUI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These resins release harmful components formaldehyde and phenol during the heating process of casting, so the pollution is serious during pouring, and the working environment threatens the health of workers
At the same time, a large amount of waste sand is produced during production, which consumes a large amount of natural resources and causes environmental pollution. The quality of castings is lower than international standards.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Firstly, the raw materials are weighed according to the composition (by weight percentage), which contains 70% of cardanol, 10% of potassium hydroxide, and 20% of ethanol.

[0018] After the cardanol is tested to pass the moisture and ash content, put it into the reaction kettle, heat it up to 40°C--60°C, add potassium hydroxide, heat it up to 100°C--120°C, and keep it warm for 0.5-1.5 hours , continue to heat up to 280 ℃ ~ 350 ℃, keep warm for 1.5-3.5 hours, cardanol self-polymerizes to 8-100,000 MPa·s at high temperature under alkaline conditions. Then the temperature is lowered to 40°C-60°C, add ethanol to adjust the pH value to 6--8, and then adjust the viscosity. Various characterization tests were carried out on the product, and the results showed that it was the expected product.

[0019] Through production verification, the sand prepared by the adhesive of the present invention is used to produce large-scale castings. During the production process, the box will...

Embodiment 2

[0021] Firstly, the raw materials are weighed according to the components (percentage by weight), which contain 65% eugenol, 10% barium hydroxide, and 25% water.

[0022] After the eugenol passes the test of moisture and ash, put it into the reaction kettle, heat it up to 45°C--55°C, add barium hydroxide, heat it up to 100°C--110°C, keep it warm for 0.5-1 hour, continue Raise the temperature to 280°C-300°C and keep it warm for 1.5-3 hours. Eugenol self-polymerizes to 9--100,000 MPa·s at high temperature under alkaline conditions. Then the temperature is lowered to 45°C-50°C, water is added to adjust the pH value to 6--7, and then the viscosity is adjusted to obtain the product. Various characterization tests were carried out on the product, and the results showed that it was the desired product.

Embodiment 3

[0024] Firstly, the raw materials are weighed according to the composition (percentage by weight), which contains 60% guaiacol, 8% barium hydroxide, and 32% ethanol.

[0025] After the guaiacol is tested to pass the water and ash content, put it into the reaction kettle, heat it up to 50°C--55°C, add barium hydroxide, heat it up to 110°C--115°C, and keep it warm for 0.5-1 hour , continue to heat up to 290°C-300°C, and keep warm for 2.5-3 hours. Guaiacol self-polymerizes to 90,000-95,000 MPa·s at high temperature under alkaline conditions. Then the temperature is lowered to 50°C-55°C, ethanol is added to adjust the pH value to 6.5-7.5, and then the viscosity is adjusted to obtain the product. Various characterization tests were carried out on the product, and the results showed that it was the desired product.

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PUM

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Abstract

The invention discloses a thermosetting environment-friendly phenolic resin, which comprises a the following ingredients (by weight percentage): 50-75% of plant phenol from natural resources, 5-15% of potassium hydroxide and / or barium hydroxide and 20-40% of latent solvent. The plant phenol is anacardol, eugenol or guaiacol; the latent solvent is composition of one or more of diol, diol derivative, ester, water and ethanol. The manufacturing method of the thermosetting environment-friendly comprises the following steps: weighing materials in proportion, adding the plant phenol in a reaction kettle, heating to 40-60 DEG C and then adding potassium hydroxide and / or barium hydroxide, after that heating to 100-120 DEG C to stay for 0.5-1.5h, and continuing to heat to 280-350 DEG C to stay for 1.5-3.5h; allowing the viscosity to reach 80,000-100,000MPa, then decreasing the temperature to 40-60 DEG C, and adding the latent solvent to adjust pH value to 6-8; and then regulating the viscosity.

Description

technical field [0001] The invention discloses a thermosetting environment-friendly phenolic resin that does not pollute the environment, and in particular relates to a thermosetting environment-friendly phenolic resin that can be used in the production of cast steel, cast iron and nonferrous metals and a preparation method thereof. Background technique [0002] Molding sand used in the foundry industry consists of sand etc. mixed with suitable binders. The binder creates a strong bond between the grains of the sand, giving the molding sand the necessary mechanical stability. Since the beginning of this century, the foundry industry around the world is facing two challenges: one is the continuous improvement of casting quality requirements; the other is the increasingly stringent requirements for environmental protection and clean production. At present, the main casting adhesive used in the industry is phenolic resin, such as furan resin, alkali phenolic resin, resole phen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/28C09J161/14B22C1/22
Inventor 王海江
Owner NINGBO JINHUI PRECISION CASTING
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