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A kind of preparation method of furan resin for 3D printing

A furan resin, 3D printing technology, applied in the field of organic chemistry, can solve the problem of few binders in 3D sand printing, and achieve the effect of environmental friendly strength, obvious secondary hardening characteristics, and easy reuse.

Active Publication Date: 2020-12-11
SUZHOU XINGYE MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the development of domestic 3D testing machines and the technical limitations of foreign commercial equipment for material research, domestic research on 3D materials is still at the primary level, and there are very few binders that can be used for 3D sand printing.

Method used

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  • A kind of preparation method of furan resin for 3D printing
  • A kind of preparation method of furan resin for 3D printing
  • A kind of preparation method of furan resin for 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Tannic acid furfuryl alcohol prepolymer treatment: Add 200g furfuryl alcohol and 30g tannic acid into the reaction kettle, adjust the pH to 4.1 with 0.28g hydrochloric acid, heat up to 100-105°C, keep stirring for 3 hours; cool down to Dehydration under reduced pressure at 60°C and a vacuum of -0.09MPa until the water content is below 0.5%, to obtain a tannic acid furfuryl alcohol prepolymer, a mixture of furfuryl alcohol and tannic acid.

[0038] (2) Epoxy vegetable oil modified tannic acid furfuryl alcohol prepolymer treatment: 200 g of tannic acid furfuryl alcohol prepolymerization solution obtained in step (1) and 3 g of ammonia water are added to the reaction kettle, and the temperature is raised to 120 ° C, and the epoxy large Divide 100g of soybean oil into three equal parts and add it every half an hour. After the addition is complete, continue to keep warm in the range of 120-125°C until the viscosity measured at 20°C reaches 40Pa.s to stop the reaction.

...

Embodiment 2

[0041](1) Tannic acid furfuryl alcohol prepolymer treatment: Add 250g furfuryl alcohol and 40g tannic acid into the reaction kettle, adjust the pH to 3.6 with 0.4g formic acid, heat up to 110-115°C, keep stirring for 3 hours; cool down to Dehydration under reduced pressure at 60°C and a vacuum of -0.09MPa until the water content is below 0.5%, to obtain a tannic acid furfuryl alcohol prepolymer, a mixture of furfuryl alcohol and tannic acid.

[0042] (2) Epoxy vegetable oil modified tannic acid furfuryl alcohol prepolymer treatment: 150 g of tannic acid furfuryl alcohol prepolymerization liquid obtained in step (1), and 8 g of divinylamine are added in the reactor, and the temperature is raised to 130° C. Divide 200g of oxygenated peanut oil into three equal parts and add it every half an hour. After the addition is complete, continue to keep warm in the range of 130-135°C until the viscosity measured at 20°C reaches 40Pa.s to stop the reaction.

[0043] (3) Mixing treatment: ...

Embodiment 3

[0045] (1) Tannic acid furfuryl alcohol prepolymer treatment: Add 200 g of furfuryl alcohol and 40 g of tannic acid into the reaction kettle, adjust the pH to 3.8 with 0.68 g of benzenesulfonic acid, raise the temperature to 140-145°C, and keep stirring for 2 hours; The temperature is lowered to 60° C., and the vacuum degree is -0.09 MPa, and the dehydration is reduced under reduced pressure until the water content is below 0.5%, so as to obtain a mixture of tannic acid furfuryl alcohol prepolymer, furfuryl alcohol and tannic acid.

[0046] (2) Epoxy vegetable oil modified tannic acid furfuryl alcohol prepolymer treatment: 200 g of the tannic acid furfuryl alcohol prepolymerization liquid obtained in step (1), and 6 g of triethylamine are added in the reactor, and the temperature is raised to 140° C. Divide 300g of oxy castor oil into three equal parts and add it every half an hour. After the addition is complete, continue to keep warm in the range of 140-145°C until the viscos...

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Abstract

The invention discloses a preparation method of furan resin used for 3D printing. The method comprises the following steps: furfuryl alcohol, tannic acid and an acid catalyst are subjected to condensation polymerization and dehydration under certain conditions, then epoxidized vegetable oil is used to modify the condensation polymer under weak alkaline conditions, and finally a solvent furfuryl alcohol and other additives are added. The resin provided by the invention has a wide application range, and the characteristics of low viscosity, a fast curing speed, high strength, environmental friendliness and the like.

Description

technical field [0001] The invention belongs to the technical field of organic chemistry, and in particular relates to a preparation method of furan resin for 3D printing rings. Background technique [0002] 3D printing technology, also known as rapid prototyping manufacturing (RPM), is the core of moldless casting technology. It was born in the late 1980s and is a rapid prototyping technology based on material accumulation method, also known as additive manufacturing. There have been some applications in casting, mainly in the rapid manufacture of sand molds and direct printing of metal products, and there are also certain applications in defect repair (rescue). [0003] In the traditional casting process, the design and manufacturing of patterns, core boxes and other molds is a multi-link complex process. The processing method is limited by the complexity of the mold, which makes the product development and finalization cycle longer and the cost higher. At present, the bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C08G16/02
CPCC08G16/02C08G83/00
Inventor 戴旭朱文英王进兴王文浩
Owner SUZHOU XINGYE MATERIALS TECH
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