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Antibacterial polypropylene resin powder used for selective laser sintering and preparation thereof

The technology of polypropylene resin and antibacterial polypropylene is applied in the field of antibacterial polypropylene resin powder and its preparation, which can solve the problems of breeding, spreading and restriction, and achieve the effects of suitable bulk density, small size error and good performance.

Inactive Publication Date: 2017-04-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the objective conditions such as temperature and humidity are suitable, harmful microorganisms such as bacteria and molds will breed and spread on plastic products, which seriously affects people's daily life and health, thus restricting their application.

Method used

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  • Antibacterial polypropylene resin powder used for selective laser sintering and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 100 parts by weight of a polypropylene resin (melt index (210° C., 2.16 kg) of 35 g / 10 min) and 1000 parts by weight of n-hexane were placed in an autoclave. Introduce high-purity nitrogen to 0.2MPa; then raise the temperature to 120°C, and keep the temperature at this temperature for 60 minutes; after the end of the constant temperature, cool down to 80°C with cooling water at a rate of 1.0°C / min, and keep the temperature at this temperature for 60 minutes; continue Decrease to 25°C at a rate of 1.0°C / min, and keep at this temperature for 60 minutes. After adding the zirconium phosphate silver-loaded antimicrobial agent of 0.5 weight fraction in the obtained solid-liquid mixture, the antioxidant 1010 of 0.25 weight fraction and the antioxidant 168 of 0.25 weight fraction, and after the calcium stearate of 0.5 weight fraction, through centrifugation And vacuum drying to obtain antibacterial polypropylene resin powder suitable for selective laser sintering. The particle...

Embodiment 2

[0042] 100 parts by weight of a polypropylene resin (melt index (210° C., 2.16 kg) of 55 g / 10 min) and 800 parts by weight of n-hexane were placed in an autoclave. Introduce high-purity nitrogen to 0.3MPa; then raise the temperature to 130°C, and keep the temperature at this temperature for 60 minutes; after the constant temperature is over, the cooling water will drop to 75°C at a rate of 1.0°C / min, and keep the temperature at this temperature for 60 minutes; Decrease to 20°C at a rate of 1.0°C / min and hold at 20°C for 60 minutes. After adding 0.05 weight fraction of zinc pyrithione, 0.25 weight fraction of antioxidant 1010 and 0.25 weight fraction of antioxidant 168, and 1 weight fraction of zinc stearate in the obtained solid-liquid mixture, centrifugation and vacuum After drying, an antibacterial polypropylene resin powder suitable for selective laser sintering is obtained. As measured by a laser particle size analyzer, the particle size of the antibacterial polypropylene...

Embodiment 3

[0044] 100 parts by weight of a polypropylene resin (melt index (210° C., 2.16 kg) of 70 g / 10 min) and 1200 parts by weight of n-hexane were placed in an autoclave. Introduce high-purity nitrogen to 0.1MPa; then raise the temperature to 110°C, and keep the temperature at this temperature for 90 minutes; after the constant temperature is completed, cool it down to 25°C with cooling water at a rate of 0.1°C / min, and keep the temperature at this temperature for 90 minutes. After adding 1.5 weight fraction of nano-zinc oxide, 0.1 weight fraction of antioxidant 1010 and 0.1 weight fraction of antioxidant 168, and 0.75 weight fraction of nano-silica in the obtained solid-liquid mixture, centrifugal separation and vacuum drying Finally, the antibacterial polypropylene resin powder suitable for selective laser sintering is obtained. As measured by a laser particle size analyzer, the particle size of the antibacterial polypropylene resin powder obtained in this embodiment is 30-147 μm,...

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Abstract

A preparing method of antibacterial polypropylene resin powder used for selective laser sintering is provided. The method includes a) dissolving polypropylene resin to an alkane organic solvent at a heating temperature to obtain a polypropylene resin solution, b) cooling the polypropylene resin solution prepared in the step a) to allow a solid precipitate to precipitate out, and c) adding auxiliary agents into a solid liquid mixture obtained in the step b), then fully mixing the mixture, and drying the mixture to obtain the power, wherein the auxiliary agents comprise an antibacterial agent, an antioxidant and a powder separating agent. The method is simple and easy to operate. A sintering raw material having excellent processing performance is provided for selective laser sintering, and a novel direction is provided for processing and application of functional polypropylene resin. The invention further provides the antibacterial polypropylene resin powder prepared by the method and a selective laser sintering method adopting the antibacterial polypropylene resin powder as a sintering powder raw material.

Description

technical field [0001] The invention relates to the technical field of polymer processing, in particular to an antibacterial polypropylene resin powder for selective laser sintering, a preparation method thereof and an application in selective laser sintering. Background technique [0002] Selective Laser Sintering (SLS) technology is a rapid prototyping technology, which is currently the most widely used and most promising technology in additive manufacturing technology, showing a rapid development trend in recent years. SLS technology is a technology in which the computer first scans the three-dimensional entity, and then selectively melts and sinters the material powder pre-laid on the workbench or parts through high-intensity laser irradiation, and then realizes layer-by-layer molding. . SLS technology has a high degree of design flexibility, can manufacture accurate models and prototypes, can form parts with reliable structures that can be used directly, and has a shor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/14C08L23/12C08K13/06C08K9/12C08K5/134C08K5/526C08K5/098C08K3/22C08K3/26
Inventor 初立秋刘建叶李杰张师军张丽英杨庆泉高达利尹华白弈青张琦
Owner CHINA PETROLEUM & CHEM CORP
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