Micro-sized spherical polypropylene particles and methods of preparation; 3D printing raw materials and applications.
Patent Information
- Application Number
- TH2401002717
- Authority / Receiving Office
- TH · TH
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2022-10-27
- Publication Date
- 2026-08-17
AI Technical Summary
The crystallization sequence distribution of polypropylene microspheres in the prior art has poor uniformity, resulting in poor melting uniformity when used for 3D printing, affecting the structural strength and surface properties of the product, and high-cost liquid nitrogen cryogenic treatment is required during the polymer crushing process. , resulting in irregular powder shape and poor fluidity.
By copolymerizing propylene in an olefin polymerization catalyst system, polypropylene microspheres are prepared, and the half-peak width of the melting endothermic curve is controlled to be between 4 and 10°C, the molecular weight distribution is between 4 and 9, and the average particle size is between 50 μm and 200 μm. , the aspect ratio is between 0.9 and 1.1, and the morphology replication characteristics of the catalyst are used to directly polymerize to obtain spherical polymers, reducing the use of alkyl aluminum and improving the fluidity and morphology regularity of the polymer.
Significantly improves the foaming rate and uniformity of EPP beads, reduces molding temperature and energy consumption, shortens the production cycle, improves the structural strength and surface properties of 3D printed products, reduces production costs, and achieves better Industrial application prospects.