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Polyoxamide powder and preparation method thereof

A technology of polyoxamide and powder, which is applied in the field of polyoxamide powder and its preparation, can solve problems affecting popularization and application, consume large solvent, and high cost, and achieve good application prospects, uniform particle size distribution, and regular shape effects

Inactive Publication Date: 2016-10-12
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The nylon powder for 3D printing disclosed in the above-mentioned patent and its preparation method have the following common deficiencies, which affect its promotion and application
[0005] (1) A large amount of solvent is consumed during the preparation process, slow cooling is required during the powder precipitation process, the production cycle is long, the post-processing process is complicated, and the cost is too high
[0006] (2) The powder shape is irregular and the particle size distribution is uneven, which cannot meet the requirements of industrial applications for product precision and strength

Method used

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  • Polyoxamide powder and preparation method thereof
  • Polyoxamide powder and preparation method thereof
  • Polyoxamide powder and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Dibutyl oxalate monomer (202.25g) and decane diamine monomer (177.49g) were pumped into the nozzle through the dosing pump at 3m. 3 Atomization polymerization is carried out in a nitrogen gas stream at a temperature of 22.15 min. The N102 prepolymer is obtained by vacuum drying. The N102 prepolymer is pulverized by a pulverizer to obtain prepolymer powder. The aforementioned prepolymer powder At 3m 3 The solid-phase polymerization is carried out in a nitrogen gas stream at a temperature of 150℃, the solid-phase polymerization time is 3h, and the vacuum degree of the solid-phase polymerization is 200Mpa to obtain N102 polymer powder. Use a pulverizer to remove N102 polymer powder. It was further pulverized to obtain N102 powder with an average particle size of 180.5 μm and a melting point of 250°C measured by DSC.

Embodiment 2

[0037] Dibutyl oxalate monomer (202.25g) and decane diamine monomer (177.49g) were pumped into the nozzle through the dosing pump at 4m 3 Atomization polymerization is carried out in a nitrogen gas stream at a temperature of 22.15 min. The N102 prepolymer is obtained by vacuum drying. The N102 prepolymer is pulverized by a pulverizer to obtain prepolymer powder. The aforementioned prepolymer powder At 4m 3 / h for solid-phase polymerization in a nitrogen gas stream. The solid-phase polymerization temperature is 170℃, the solid-phase polymerization time is 5h, and the solid-phase polymerization vacuum is 220Mpa to obtain N102 polymer powder. Further pulverize to obtain N102 powder. Put 100g of the aforementioned N102 powder and 0.5g of white carbon black into a high-speed mixer and mix until the mixture is evenly mixed to obtain N102 / silica mixture powder. The average particle size is 140.2μm. The melting point measured by DSC is 250.1°C.

Embodiment 3

[0039] Dibutyl oxalate monomer (202.25g) and decane diamine monomer (177.49g) were pumped into the nozzle through the dosing pump at 5m 3 Atomization polymerization is carried out in a nitrogen gas stream at a temperature of 22.15 min. The N102 prepolymer is obtained by vacuum drying. The N102 prepolymer is pulverized by a pulverizer to obtain prepolymer powder. The aforementioned prepolymer powder At 5m 3 / h for solid-phase polymerization in a nitrogen gas stream. The solid-phase polymerization temperature is 180℃, the solid-phase polymerization time is 8h, and the solid-phase polymerization vacuum is 250Mpa to obtain N102 polymer powder. Further pulverize to obtain N102 powder. Put 100g of the aforementioned N102 powder and 1g of white carbon black into a high-speed mixer and mix until they are evenly mixed to obtain N102 / silica mixture powder. The average particle size is 100.1μm, and the melting point measured by DSC is 250.4. ℃.

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Abstract

The invention relates to a polyoxamide powder and a preparation method thereof. The polyoxamide powder is obtained through atomization polymerization of diamine and oxalic acid diester, crushing, solid phase polymerization, and crushing again. The preparation method includes: (1) preparing the polyoxamide prepolymer; (2) crushing the prepolymer; (3) solid phase polymerization; (4) crushing the polyoxamide. The polyoxamide powder of the present invention has regular shape and uniform particle size distribution, and can be used in the fields of 3D printing, coatings, cosmetic packaging materials and the like; no solvent is consumed during the preparation process, the cost is low, and it has good application prospects.

Description

Technical field [0001] The invention belongs to the field of polymer materials, and particularly relates to a polyoxamide powder and a preparation method thereof. Background technique [0002] Nylon powder is polyamide powder, and there are many types, such as nylon 6, nylon 66, nylon 1010, nylon 11, nylon 12 and modified nylon powder. They all maintain the excellent properties of the original nylon, have good mechanical properties and wear resistance, high softening point, self-lubricating, oil and general chemicals, non-toxic, good electrical insulation, easy to process, so they are widely used in powder Coatings, fillers, adhesives, medicine, cosmetics, 3D printing and other fields have become a promising polymer material. [0003] In recent years, with the development of 3D printing technology, nylon powder has been increasingly used in 3D printing technology. 201410399560.9 discloses a method of adding surfactants, light absorbers, compatibilizers, viscosity reducers, antiox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/44
CPCC08G69/44
Inventor 吴中玲何勇赵国欣
Owner DONGHUA UNIV
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