Furan resin for casting and production method thereof

A technology of furan resin and reaction device, which is applied in the field of sand casting, can solve problems such as low strength, affecting use, and poor adhesion, and achieve the effects of reducing damage, improving safety, and good strength

Inactive Publication Date: 2019-02-05
保定永强合成材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country has extremely rich resources of agricultural and sideline products, but when furan resin is used in the casting process, due to its shortcomings such as low strength and poor adhesion, it g

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Add 30 parts of furfuryl alcohol, 200 parts of water, and 18 parts of formaldehyde into the reaction device, and mix them evenly. After preliminary mixing, control the temperature of the reaction device to raise the temperature of the reaction device to 100°C, and then add 10 parts of Urea, 6 parts of copper-zinc catalyst with a copper-zinc ratio of 1:1.5 and 2 parts of magnesium promoter, after stirring evenly, adjust the pH of the mixture to 10 with alkaline solution such as sodium hydroxide or potassium hydroxide, and perform addition reaction at 100°C After 1.5 hours, then add 30 parts of furfuryl alcohol to the reaction device, and adjust the pH of the mixture to 6 with an acid solution such as hydrochloric acid solution or nitric acid solution, and carry out polycondensation reaction at 100°C for 1 hour;

[0045] After the polycondensation reaction is completed, add the remaining 15 parts of urea, 8 parts of formaldehyde reducing agent and 4 parts of oxidized starc...

Embodiment 2

[0058] Add 25 parts of furfuryl alcohol, 150 parts of water, and 20 parts of formaldehyde into the reaction device, and mix them evenly. After preliminary mixing, control the temperature of the reaction device to raise the temperature of the reaction device to 100°C, and then add 12 parts of Urea, 10 parts of copper-zinc catalyst with a copper-zinc ratio of 1:1.5 and 2 parts of magnesium promoter, after stirring evenly, adjust the pH of the mixture to 10 with alkaline solution such as sodium hydroxide or potassium hydroxide, and perform addition reaction at 100°C After 1.5 hours, add 25 parts of furfuryl alcohol to the reaction device, adjust the pH of the mixture to 6 with an acid solution such as hydrochloric acid solution or nitric acid solution, and carry out polycondensation reaction at 100°C for 1 hour;

[0059] After the polycondensation reaction is completed, add the remaining 18 parts of urea, 10 parts of formaldehyde reducing agent and 5 parts of oxidized starch into ...

Embodiment 3

[0072] Add 15 parts of furfuryl alcohol, 100 parts of water, and 10 parts of formaldehyde into the reaction device, and mix them evenly. After preliminary mixing, control the temperature of the reaction device to raise the temperature of the reaction device to 100°C, and then add 8 parts of Urea, 5 parts of copper-zinc catalyst with a copper-zinc ratio of 1:1.5 and 1 part of magnesium promoter, after stirring evenly, adjust the pH of the mixture to 10 with alkaline solution such as sodium hydroxide or potassium hydroxide, and perform addition reaction at 100°C After 1.5 hours, then add 20 parts of furfuryl alcohol to the reaction device, and adjust the pH of the mixture to 6 with an acid solution such as hydrochloric acid solution or nitric acid solution, and carry out polycondensation reaction at 100°C for 1 hour;

[0073] After the polycondensation reaction is completed, add the remaining 12 parts of urea, 5 parts of formaldehyde reducing agent and 2 parts of oxidized starch ...

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PUM

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Abstract

The invention relates to the technical field of sand casting, in particular to furan resin for casting and a production method thereof, which can improve the strength, can improve the adhesion property, and can reduce the influence on the sand casting. The furan resin for casting is prepared by performing addition reaction, condensation reaction and aldehyde reduction reaction on the following rawmaterials in parts by weight: 100 to 200 parts of water, 50 to 80 parts of furfuryl alcohol, 10 to 20 parts of formaldehyde, 5 to 10 parts of a catalyst, 1 to 2 parts of an aid, 20 to 30 parts of urea, 5 to 10 parts of an aldehyde reduction agent, and 2 to 5 parts of oxidized starch.

Description

technical field [0001] The invention relates to the technical field of sand casting, in particular to a furan resin for casting and a manufacturing method thereof. Background technique [0002] After my country's accession to the WTO, the export volume of iron castings has grown rapidly. At the same time, the international market has higher and higher requirements for castings. Furan resin is used as a binder in sand casting, which significantly improves the overall quality of castings. Furan The addition of resin has the advantages of improving the dimensional accuracy of the casting, making the surface of the casting smooth and clear, and the external contour is clear. [0003] Furan resin has good industrial value. It is widely used in metallurgical casting industry and can be used for molding. For example, in the production of many auto parts, plumbing and sanitary ware, and tire molds, good economic results can be obtained after using furan resin sand technology for mold...

Claims

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Application Information

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IPC IPC(8): C08G16/02
CPCC08G16/0262
Inventor 赵海涛
Owner 保定永强合成材料有限公司
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