Ultra-high molecular weight, ultra-fine particle size polyethylene, preparation method therefor and use thereof
US11530281B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2019 |
| Grant date | Dec 20, 2022 |
| Priority date | — |
| Expiry date | Aug 11, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L9/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An ultra-high molecular weight, ultra-fine particle size polyethylene has a viscosity average molecular weight (Mv) greater than 1×106. The polyethylene is spherical or are sphere-like particles having a mean particle size of 10-100 μm, having a standard deviation of 2-15 μm and a bulk density of 0.1-0.3 g/mL. Using the polyethylene as a basic polyethylene, a grafted polyethylene can be obtained by means of a solid-phase grafting method; and a glass fiber-reinforced polyethylene composition comprising the polyethylene and glass fibers, and a sheet or pipe prepared therefrom; a solubilized ultra-high molecular weight, ultra-fine particle size polyethylene; and a fiber and a film prepared from the solubilized ultra-high molecular weight, ultra-fine particle size polyethylene may also be obtained. The method has simple steps, is easy to control, has a relatively low cost and a high repeatability, and can realize industrialisation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.