Method of preparing acrylonitrile-based polymer for producing carbon fiber
US11427659B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Sep 18, 2018 |
| Grant date | Aug 30, 2022 |
| Priority date | — |
| Expiry date | Jun 10, 2039 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/225
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of preparing an acrylonitrile-based copolymer for a carbon fiber. The method includes: preparing a reaction solution including a (meth)acrylonitrile-based monomer and a first reaction solvent; adding a first portion of a radical polymerization initiator to the reaction solution to initiate polymerization; and adding a second portion of the radical polymerization initiator to the reaction solution when a polymerization conversion ratio is between 70 to 80%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.