Preparation method of energy-saving and environment-friendly furan resin casting alcohol-based curing agent

A furan resin, energy-saving and environment-friendly technology, applied in casting and molding equipment, molds, cores, etc., can solve the problems of residual benzene, large amount of waste water, and long preparation time.

Pending Publication Date: 2021-09-14
江苏华岗材料科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing sulfonic acid curing agent takes a long time to prepare, produces a large amount of waste water, benzene residues, production efficiency and environmental protection requirements are not ideal
Therefore, in order to solve this series of problems, scientific research units and enterprise scientific and technological personnel are constantly exploring, researching, and using modern science and technology. Although some progress has been made in technology, there are still technical problems that have not been overcome in practical application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Table 1 Weighing of Curing Agent Type A

[0023] raw material name weight sulfuric acid 651kg Methanol 337kg Propylene carbonate 6kg Glyceryl acetate 6kg

[0024] The preparation method is as follows:

[0025] 1. Put sulfuric acid into the reaction kettle, pass cooling water, and start the mixer to stir;

[0026] 2. Throw methanol into the reaction kettle, add slowly, and keep the temperature not exceeding 50°C;

[0027] 3. Add propylene carbonate and glyceryl acetate to the reaction kettle, and stir for 40-50 minutes;

[0028] 4. After standing for 10-15 minutes, filter to obtain the A-type curing agent.

[0029] Table 2 Type A Curing Agent Indicators

[0030] Indicator name Indicator data value Density (20℃) g / m³ 1.3 Total acidity % 38 Viscosity (20℃)mpa.s 0.05 Free acid% 14

[0031] Table 3 Weighing of Curing Agent Type B

[0032] raw material name weight Class A ...

Embodiment 2

[0040] Table 5 Curing Agent Class A Weighing

[0041] raw material name weight sulfuric acid 500kg Methanol 488kg Propylene carbonate 6kg Glyceryl acetate 6kg

[0042] The preparation method is as follows:

[0043] 1. Put sulfuric acid into the reaction kettle, pass cooling water, and start the mixer to stir;

[0044] 2. Throw methanol into the reaction kettle, add slowly, and keep the temperature not exceeding 50°C;

[0045] 3. Add propylene carbonate and glyceryl acetate to the reaction kettle, and stir for 40-50 minutes;

[0046] 4. After standing for 10-15 minutes, filter to obtain the A-type curing agent.

[0047] Table 6 Type A Curing Agent Indicators

[0048] Indicator name Indicator data value Density (20℃) g / m³ 1.12 Total acidity % 27 Viscosity (20℃)mpa.s 0.07 Free acid% 16

[0049] Table 7 Weighing of Curing Agent Type B

[0050] raw material name weight Class A c...

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PUM

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Abstract

The invention discloses an energy-saving and environment-friendly furan resin casting alcohol-based curing agent which is different from a sulfonic acid curing agent, and methanol, sulfuric acid, propylene carbonate and glycerol acetate are adopted in the preparation process. Higher environmental protection standards can be reached in actual production and application, the curing effect of the furan resin casting adhesive is better, the amount of waste water is reduced, and the body health of workers is effectively protected. The curing agent well solves the problems that an existing sulfonic acid curing agent is long in preparation time, a large amount of waste water is generated, benzene substance residues exist, and the production efficiency and the environment-friendly requirement are not ideal.

Description

technical field [0001] The invention relates to a preparation method of an alcohol-based curing agent, in particular to a preparation method of an energy-saving and environment-friendly furan resin casting alcohol-based curing agent. Background technique [0002] Curing agent, also known as hardening agent, curing agent or stabilizer, is a kind of substance or mixture that promotes or controls the curing reaction. Resin curing is through chemical reactions such as condensation, ring closure, addition or catalysis, so that the thermosetting resin undergoes an irreversible change process, and curing is completed by adding a curing agent. Curing agent is an essential additive, whether it is used as casting adhesives, coatings, or castables, it is necessary to add a curing agent. Furan resins cannot be cured without a curing agent. The variety of curing agent has a great influence on the mechanical properties, heat resistance, water resistance and corrosion resistance of the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/22
CPCB22C1/224
Inventor 蒋存霞蒋龙根蒋凤霞
Owner 江苏华岗材料科技发展有限公司
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