Method for preparing polyamide by anion ring-opening polymerization and polyamide prepared thereby
US12338323B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Nov 5, 2018 |
| Grant date | Jun 24, 2025 |
| Priority date | — |
| Expiry date | Feb 15, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided is a method for preparing a polyamide by an anionic polymerization reaction, wherein lactam, and based on 100 parts by weight of the entire lactam, 0.01 parts by weight to 20 parts by weight of an alkali metal as an initiator, 0.3 parts by weight to 10 parts by weight of a molecular weight controller, and 0.002 parts by weight to 1.0 part by weight of carbon dioxide as an activator may be included.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.