High-temperature curing agent for phenolic resin in fields of casting and 3D (Three Dimensional) ink-jet printing

A technology of high-temperature curing agent and phenolic resin, which is applied in the direction of casting molding equipment, casting molds, manufacturing tools, etc., can solve the problems that cannot meet the specific requirements of resin viscosity, cannot achieve strength, cannot match, etc., to achieve convenient storage and transportation, Excellent collapsibility and system stability

Active Publication Date: 2018-11-30
NINGXIA KOCEL MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkaline phenolic resin and cold box resin can achieve rapid curing and molding at room temperature, but both have high viscosity (generally between 100-300mpa.s), which cannot meet the specific requirements of casting 3D inkjet printing technology for resin viscosity
Alkaline phenolic resin is a water-soluble resin. Although the viscosity can be reduced by adding solvent water to achieve the resin viscosity required by casting 3D inkjet printing technology, but in this way, the resin will not reach the usable strength
The cold box resin is an alcohol-soluble resin, and it is not feasible to reduce the viscosity by adding solvent alone.
On the other hand, cold box resin is a three-component system, while the liquid material system supported by 3D inkjet printers is a two-component or one-component system, which cannot match the liquid material system of 3D inkjet printers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] ① The urea of ​​4% mass fraction, the water of 25% mass fraction and the described inorganic acid salt of 8% mass fraction are pumped into the enamel reaction kettle with a vacuum pump, start stirring and start to heat up, and the temperature rises to 60- 70°C, timed stirring for 30-40min.

[0036] ② Use a vacuum pump to pump 7% of the above-mentioned phenylethanolamine and 10% of the acid anhydride into the enamel reaction kettle, raise the temperature to 80-85°C, and stir for 10-15 minutes.

[0037] ③ Cool down to 50-60°C, add 30% by mass of the above-mentioned inorganic acid, and stir for 60-90min.

[0038] ④ Cool down to 25-30°C, add 16% by mass of the organic solvent, and stir for 30-40 minutes.

[0039] ⑤ Testing and packaging to obtain a new type of high temperature curing agent for phenolic resin.

[0040] The total acidity of the new high-temperature curing agent for phenolic resin is 36%, the free acid is 21%, and the pH value is less than 2; the normal temp...

Embodiment 2

[0042] ① The urea of ​​5% mass fraction, the water of 20% mass fraction and the described inorganic acid salt of 10% mass fraction are pumped into the enamel reaction kettle with a vacuum pump, the stirring is started and the temperature is raised, and the temperature rises to 60- 70°C, timed stirring for 30-40min.

[0043] ② Use a vacuum pump to pump 10% of the above-mentioned phenylethanolamine and 10% of the acid anhydride into the enamel reaction kettle, raise the temperature to 80-85°C, and stir for 10-15 minutes.

[0044] ③ Cool down to 50-60°C, add 25% by mass of the above-mentioned inorganic acid, and stir for 60-90 minutes.

[0045] ④ Cool down to 25-30°C, add 20% by mass of the above-mentioned organic solvent, and stir for 30-40min.

[0046] ⑤ Testing and packaging to obtain a new type of high temperature curing agent for phenolic resin.

[0047] The total acidity of the new high-temperature curing agent for phenolic resin is 30%, the free acid is 19%, and the pH v...

Embodiment 3

[0049] ① The urea of ​​5% mass fraction, the water of 22% mass fraction and the described inorganic acid salt of 9% mass fraction are pumped into the enamel reaction kettle with a vacuum pump, start stirring and start to heat up, and the temperature rises to 60- 70°C, timed stirring for 30-40min.

[0050] ② Pump 8% mass fraction of the phenylethanolamine and 7% mass fraction of the acid anhydride into the enamel reaction kettle, raise the temperature to 80-85°C, and stir for 10-15 minutes.

[0051] ③ Cool down to 50-60°C, add 35% by mass of the above-mentioned inorganic acid, and stir for 60-90 minutes.

[0052] ④ Cool down to 25-30°C, add 14% mass fraction of the above-mentioned organic solvent, and stir for 30-40min.

[0053] ⑤ Testing and packaging to obtain a new type of high temperature curing agent for phenolic resin.

[0054] The total acidity of the new high-temperature curing agent for phenolic resin is 39%, the free acid is 24%, and the pH value is less than 2; the n...

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Abstract

The invention discloses a high-temperature curing agent for phenolic resin in the fields of casting and 3D (Three Dimensional) ink-jet printing. The high-temperature curing agent for the phenolic resin is a strong-acid liquid material, the pH (Potential of Hydrogen) value of the high-temperature curing agent is smaller than 2, the content of free acid is 15 to 30 percent, and the total acidity is20 to 45 percent; the high-temperature curing agent for the phenolic resin is prepared from the following components: inorganic acid, inorganic acid salt, anhydride, urea, phenylethanolamine and othercompounds. Although common phenolic resin for casting is capable of realizing normal-temperature rapid curing and forming, both the common phenolic resin and the phenolic resin are in larger viscosity, and the specific requirements of casting and 3D ink-jet printing technologies on resin viscosity cannot be met. In order to overcome the defects of the prior art, the high-temperature curing agentfor the phenolic resin in the fields of casting and 3D ink-jet printing is successfully invented through technical innovation; casting sand formed through cross-linking and curing of the high-temperature curing agent and thermoset A-stage phenolic resin under a high-temperature condition has the advantages of high normal-temperature strength, excellent high temperature resistance, good scatteringperformance and the like.

Description

technical field [0001] The invention relates to the field of casting auxiliary materials, in particular to a high-temperature curing agent for phenolic resin used in the field of casting 3D inkjet printing and a preparation method thereof. Background technique [0002] At present, the binders used in the field of foundry 3D inkjet printing at home and abroad are furan resin binders and inorganic salt binders. Although the furan resin binder can achieve rapid curing at room temperature, it meets the basic requirements of casting 3D inkjet printing technology. However, due to its poor high temperature resistance, when it is used in the production of steel castings, the castings have sand sticking and veining defects, which are especially obvious when pouring thin-walled steel castings, which limits the bonding of furan resin The further development of the agent in the field of cast steel. [0003] Inorganic salt binders have unique advantages in the field of non-ferrous allo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/16B22C1/10
CPCB22C1/10B22C1/167
Inventor 邢金龙韩文张茜
Owner NINGXIA KOCEL MOLD
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