Method of preparing (meth)acrylonitrile-based polymer for preparing carbon fiber
US11046792B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2018 |
| Grant date | Jun 29, 2021 |
| Priority date | — |
| Expiry date | May 24, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2400/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a method of preparing a (meth)acrylonitrile-based polymer for preparing a carbon fiber, which comprises adding a reaction solution comprising a (meth)acrylonitrile-based monomer and a reaction solvent to a reactor to perform solution polymerization, performing solution polymerization under a condition in which a power consumption of the reactor is 1 to 5 kW/m3 when the reaction solution in the reactor has a viscosity of 0.1 poise or more and 250 poise or less, and performing solution polymerization under a condition in which a power consumption of the reactor is 8 to 13 kW/m3 when the reaction solution in the reactor has a viscosity of more than 250 poise and 450 poise or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.