Method for producing aromatic polyether, and potassium carbonate used in same
US12319785B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Sep 2, 2021 |
| Grant date | Jun 3, 2025 |
| Priority date | — |
| Expiry date | Sep 2, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/4087
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided is a method for producing an aromatic polyether, comprising reacting 4,4′-dichlorobenzophenone and hydroquinone in the presence of a potassium carbonate satisfying at least one of the following conditions (A) and (B): (A) the potassium carbonate has a bulk density of 1.2 g/ml or less; and (B) an average particle diameter D (μm) and a specific surface area S (m2/g) of the potassium carbonate satisfy D/S≤600.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.