Process for producing ultrahigh molecular weight polymer in powder form
US11920007B2 · kind B2 · utility
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9References
4Claims
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Key dates
| Filing date | Jun 23, 2021 |
| Grant date | Mar 5, 2024 |
| Priority date | — |
| Expiry date | Feb 10, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/068
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process for producing ultrahigh molecular weight polymer in powder form which is highly efficient drag reducing polymer. The process consists of polymerizing using titanium halide-based catalyst, co-catalyst, optionally a solvent, and monomer to a polymerization reactor, having stirring device and inlet charging and discharge outlet. The resulting ultrahigh molecular weight drag reducing polymers is free flowing, having intrinsic viscosity >10 dL/g. The process reduces polymerization time, temperature, and achieves high conversion, i.e., >90%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.