Copolyamide binder for metal powder injection molding and preparation method thereof

A copolyamide and metal powder technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of high feeding viscosity, environmental pollution, high cost, etc., and achieve high powder loading capacity, low melt viscosity, and easy injection molding processing Effect

Active Publication Date: 2019-11-12
安徽泰合新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 2. Polyaldehyde-based binder, mainly using polyoxymethylene, polyvinyl butyral, etc. as raw materials, has the advantages of high compaction strength, good shape retention, and no two-phase separation, but the feeding viscosity is high, requiring special Degreasing equipment, large investment, high cost, pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 225.97g of C18 dimerized linoleic acid, 20.22g of sebacic acid, and 100ml of constant pressure dropper into a 500ml reaction flask equipped with a thermometer, a mechanical stirrer, a condenser tube and a nitrogen inlet tube. 50.57, g, pass nitrogen to prevent oxidation, stir and heat up at the same time, when the temperature in the reaction bottle reaches 130°C, start to add diethylenetriamine dropwise, the temperature is controlled at 130°C, after the dropwise addition, keep warm for 1 hour. Then add 1.48g of 2,2-dimethylolbutyric acid, and start to slowly heat up to about 240°C. During the heating process, water will distill out. When the reaction temperature reaches 240°C, use a vacuum pump to vacuumize and reduce the pressure. 100 Pa, keep the stirring rate at a certain value, and release the vacuum after 3 hours to complete the reaction.

Embodiment 2

[0035] Add 225.97g of C18 dimerized linoleic acid, 20.22g of sebacic acid, and 100ml of constant pressure dropper into a 500ml reaction flask equipped with a thermometer, a mechanical stirrer, a condenser tube and a nitrogen inlet tube. 49.54g, pass nitrogen gas to prevent oxidation, stir and heat up at the same time, when the temperature in the reaction bottle reaches 130°C, start to add diethylenetriamine dropwise, control the temperature at 130°C, and keep warm for 1 hour after the dropwise addition. Then add 2.96g of 2,2-dimethylolbutyric acid, and start to slowly raise the temperature to about 240°C. During the heating process, water will distill out. When the reaction temperature reaches 240°C, use a vacuum pump to vacuumize and reduce the pressure. 100 Pa, keep the stirring rate at a certain value, and release the vacuum after 3 hours to complete the reaction.

Embodiment 3

[0037] Add 225.97g of C18 dimerized linoleic acid, 20.22g of sebacic acid, and 100ml of constant pressure dropper into a 500ml reaction bottle equipped with a thermometer, a mechanical stirrer, a condenser tube and a nitrogen inlet tube. 48.50g, pass nitrogen gas to prevent oxidation, stir and heat up at the same time, when the temperature in the reaction bottle reaches 130°C, start to add diethylenetriamine dropwise, the temperature is controlled at 130°C, after the dropwise addition, keep warm for 1 hour. Then add 4.44g of 2,2-dimethylolbutyric acid, and start to raise the temperature slowly to about 240°C. During the heating process, water will distill out. When the reaction temperature reaches 240°C, use a vacuum pump to vacuumize and reduce the pressure. 100 Pa, keep the stirring rate at a certain value, and release the vacuum after 3 hours to complete the reaction.

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PUM

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Abstract

The invention discloses a copolyamide binder for metal powder injection molding and a preparation method, and relates to the technical field of copolyamide binders. The adhesive comprises the following components in percentage by mole: 30%-45% of aliphatic dimer acid, 6%-20% of aliphatic dicarboxylic acid, 45%-49% of aliphatic diamine and 1%-5% of aliphatic diol with carboxyl polar groups on sidechains. The copolyamide binder is easy to dissolve, especially easy to dissolve in an alcohol solvent, has good compatibility with metal powder, and is high in powder bearing capacity, small in volumeshrinkage, low in melt viscosity and easy to carry out injection molding processing.

Description

technical field [0001] The invention relates to the technical field of copolyamide binders, in particular to a copolyamide binder which can be used for metal powder injection molding and a preparation method. Background technique [0002] Metal powder injection molding technology combines the advantages of powder metallurgy and injection molding technology. It is a near-net processing technology with the characteristics of high precision, uniform structure, low production cost and high product quality. It is suitable for a variety of metal materials and can be Forming parts with complex structures has high production efficiency. It has obvious advantages in the processing of small or micro complex structure metal parts. Metal powder injection molding technology is widely used in the manufacturing of consumer electronics, medical equipment, industrial tools, aerospace, automobiles, ships and military products. [0003] In metal powder injection molding, the binder plays a ke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/34B22F1/00B22F3/22
CPCC08G69/34B22F3/225B22F1/103B22F1/10
Inventor 康海杨刘鸿杨
Owner 安徽泰合新材料科技有限公司
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