Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of cross-linked polypropylene resin that can be used for 3D printing and its preparation method and application

A cross-linked polypropylene and 3D printing technology, applied in the field of cross-linked polypropylene resin and its preparation, can solve the problems of unfavorable molecular chain composition and structure, inability to 3D printing, regulation, etc. The effect of extending the scope of application

Active Publication Date: 2015-12-09
INST OF CHEM CHINESE ACAD OF SCI
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of blending modification is not conducive to the regulation and control of the molecular chain composition and structure of the cross-linked polymer, especially the screw extrusion process determines that the final polymer resin needs to be cooled and pelletized, so the final product In fact, it is a pellet with a diameter of millimeters, which cannot be directly used for 3D printing. It needs to be crushed, sieved and other steps before it can be used as a raw material for 3D printing.
In addition, for polymers with a high degree of cross-linking, it is impossible to melt process them through the screw, which also greatly limits the molding and application of cross-linked polymers.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of cross-linked polypropylene resin that can be used for 3D printing and its preparation method and application
  • A kind of cross-linked polypropylene resin that can be used for 3D printing and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0080] 1. Preparation of supported catalyst

[0081] The preparation steps of carrier type Ziegler-Natta catalyst:

[0082] The carrier type Ziegler-Natta catalyst used in the present invention is MgCl 2 / TiCl 4 / The internal electron donor type catalyst is characterized in that the diether or diester compound is used as the internal electron donor, and the particle size of the catalyst particles is 0.1-30 μm. Prepare as follows:

[0083] Weigh 5.0g anhydrous MgCl 2 Put it into a two-necked flask filled with argon gas and stir it with a magnet, then add 23.8mL of isooctyl alcohol and 30mL of decane, heat slowly to 130°C while stirring, react at 130°C for 1h until the solution is clear, then cool to 60-80°C ℃, add 1.0 g of phthalic anhydride, and stir overnight until the solution is clear. Under an argon atmosphere, the TiCl 4 Add 250 mL into a well-dried Schlenk reactor, cool down to -20°C, slowly add the above clear solution with stirring, and react at constant tempera...

Embodiment 1

[0098] Under normal temperature and pressure, 0.05MPa of H was introduced into the 2L polymerization reactor filled with propylene gas. 2 , add 300g of liquid propylene, 4ml of triethylaluminum solution (heptane solution with a concentration of 1.8mol / L), 10mL of 1,9-decadiene, and 12mg of the catalyst A-1 prepared above, and put the reactor into Raise it to 70°C for polymerization. After 80 minutes of reaction, lower the temperature of the polymerization reactor to room temperature, vent the residual gas in the polymerization reactor, take out the polymer obtained by the polymerization reaction, and dry it in vacuum for 6 hours to obtain 150 g of white cross-linked polypropylene. resin powder.

[0099] In the obtained cross-linked polypropylene resin, the weight content of 1,9-decadiene is 5.1%, the gel content in the resin is 6.4%, and the particle size of the polymer particles is 500-800 μm.

Embodiment 2

[0101] Under normal temperature and pressure, 0.01MPa of H was introduced into the 2L polymerization reactor filled with propylene gas. 2 , add 300g of liquid propylene, 4ml of triethylaluminum solution (heptane solution with a concentration of 1.8mol / L), 30mL of divinylbenzene, and 12mg of the catalyst A-1 prepared above, and raise the reactor to 70 After 30 minutes of reaction, the temperature of the polymerization reactor was lowered to room temperature, the residual gas in the polymerization reactor was vented, the polymer obtained by the polymerization reaction was taken out, and vacuum-dried for 6 hours to obtain 80 g of white cross-linked polypropylene resin powder.

[0102] In the obtained cross-linked polypropylene resin, the weight content of divinylbenzene is 20.8%, the gel content in the resin is 39.8%, and the particle size of the polymer particles is 200-400 μm.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses crosslinked polypropylene resin for 3D printing and a preparation method and an application thereof. According to the invention, a supported catalyst is utilized to catalyze copolymerization of propylene and diolefin so as to obtain the crosslinked polypropylene. The polymer is granular, and particle diameter is 50-1000 microns. As the resin has a small and uniform granular state and through addition of a heat stabilizer, the resin can be directly used as a 3D printing raw material, and is especially suitable for forming a high-strength high-impact product by 3D printing.

Description

technical field [0001] The invention relates to a cross-linked polypropylene resin which can be used for 3D printing and its preparation method and application, in particular to a cross-linked polypropylene resin which can be used for 3D printing directly prepared in a polymerization kettle and its preparation method and application. Background technique [0002] Due to the advantages of low density, easy processing, good mechanical properties, non-toxicity and good chemical stability, polypropylene is widely used in construction, packaging, automobile, home appliance manufacturing and other fields. However, since most of the polypropylene obtained by propylene polymerization is a linear structure polypropylene, the entanglement between polypropylene molecular chains is weak in the molten state, resulting in low melt strength and poor sag resistance, which all affect polypropylene. The application of acrylic resin in thermoforming, especially in foam molding and other proces...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08F210/06C08F4/646
Inventor 董金勇牛慧秦亚伟王宁李春成符文鑫林学春马永梅孙文华徐坚
Owner INST OF CHEM CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com