3D sand mold printing furan resin curing agent and preparing method thereof

A technology of furan resin and curing agent, which is applied in the fields of foundry adhesives and organic chemistry. It can solve the problems of high particle size and uniformity of raw sand, complex processing technology, and impact on equipment life. Effect of uneven atomization and reduction of free sulfuric acid content

Active Publication Date: 2018-09-18
SUZHOU XINGYE MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw sand used in 3D printing has high requirements in terms of particle size and uniformity, and the processing technology is complicated
[0004] At present, a small number of domestic enterprises and universities have published patents on binders for 3D sand printing, and they are at the forefront of the country, but there are few reports specifically on curing agents for 3D sand printing. The index level requirements are not high, so when it is applied to the field of 3D sand printing, its high viscosity and slow curing speed cannot meet the requirements of inkjet printers
In addition, the impact of the curing agent on the life of the equipment is also a major issue that cannot be ignored

Method used

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  • 3D sand mold printing furan resin curing agent and preparing method thereof
  • 3D sand mold printing furan resin curing agent and preparing method thereof
  • 3D sand mold printing furan resin curing agent and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Throw 100g of toluene and 50g of ethylbenzene in the reactor;

[0028] (2) Add 350g of concentrated sulfuric acid dropwise, control the reaction temperature not to exceed 60°C, and add about 2 hours for about 2 hours;

[0029] (3) Heating up to 110°C and keeping warm for 3 hours under reflux;

[0030] (4) Cool to below 50°C, add dropwise 400g of ethanol, and control the reaction temperature not to exceed 50°C;

[0031] (5) After dropping, add 50g tannic acid, 20g oxalic acid and 30g epoxy emulsion, stir and discharge.

Embodiment 2

[0033] (1) Throw 75g of xylene and 75g of ethylbenzene in the reactor;

[0034] (2) Add 300g of concentrated sulfuric acid dropwise, control the reaction temperature not to exceed 60°C, and add dropwise for about 2 hours;

[0035] (3) Heating up to 115°C and keeping warm for 2 hours under reflux;

[0036] (4) Cool to below 50°C, add dropwise 380g of ethanol, and control the reaction temperature not to exceed 50°C;

[0037] (5) After the dropwise addition, add 40g of tannic acid, 80g of salicylic acid, 30g of hydroxyethyl methacrylate and 20g of aliphatic polyoxyethyl ether, and stir to discharge.

Embodiment 3

[0039] (1) Throw 100g of toluene and 40g of xylene in the reactor;

[0040] (2) 450g of concentrated sulfuric acid was added dropwise, the reaction temperature was controlled not to exceed 60°C, and the dropwise addition time was about 2.5h;

[0041] (3) Heating up to 110°C and keeping warm for 4 hours under reflux;

[0042] (4) Cool to below 50°C, add 300g of ethanol dropwise, and control the reaction temperature not to exceed 50°C;

[0043] (5) After the dropwise addition, add 60g of formic acid, 30g of stearic acid and 20g of vinyl acetate, and stir to discharge.

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Abstract

The invention relates to a 3D sand mold printing furan resin curing agent and a preparing method thereof. The curing agent is prepared through concentrated sulfuric acid, benzene series, organic acid,ethanol and a wetting agent, and has excellent properties that viscosity and the water content are low, free acid is low, and rapid curing can be achieved, wherein at the temperature of 25 DEG C, theviscosity is smaller than or equal to 10 mPa.s, the water content is smaller than or equal to 15%, and the free acid is smaller than or equal to 10%. Rapid hardening can be achieved, and the sand mold ink jetting printing usage requirement is met.

Description

technical field [0001] The invention belongs to the technical field of organic chemistry, in particular to the technical field of casting binders, in particular to an alkali phenolic resin for 3D sand printing and a preparation method thereof, especially a fast-curing, low-viscosity, high-strength, high-temperature-resistant phenolic resin Resins and methods for their preparation. Background technique [0002] With the integration of "Internet +" and the upgrading of traditional manufacturing, digital green casting is the trend of future development. 3D sand mold printing technology can quickly realize the printing of precision casting sand molds of various sizes, complex structures, high precision and performance requirements, speed up the development of new casting products, reduce the cost and risk of process research, and at the same time Satisfy the single-piece and small-batch market. [0003] The raw and auxiliary materials of sand casting are mainly composed of raw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/22B33Y70/00
CPCB22C1/224B33Y70/00
Inventor 戴旭朱文英王文浩王锦程
Owner SUZHOU XINGYE MATERIALS TECH
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