Method for decreasing the concentration of a metal in a monomer composition comprising bis(benzoyl)benzene
US11420920B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Dec 19, 2017 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | Apr 27, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed are methods of decreasing the concentration of a metal in a monomer composition including a bis(benzoyl)benzene, bis(benzoyl)benzene monomer compositions having a low total metal concentration, di-ketone polymers made from low metal bis(benzoyl)benzene monomers, and polymer compositions and shaped articles including the di-ketone polymers. It was surprisingly found that di-ketone polymers made by nucleophilic substitution of low metal bis(benzoyl)benzene monomers exhibit greater crystallinity, as compared with di-ketone polymers made with conventional monomers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.