Method for preparing a polymer
US11203652B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2017 |
| Grant date | Dec 21, 2021 |
| Priority date | — |
| Expiry date | Apr 5, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to the preparation of a water-soluble anionic polymer, the weight-average molecular mass MW of which ranges from 1,000 to 10,000 g/mol and the polydispersity index Ip of which is less than 3.5. The polymer according to the invention is obtained by a polymerization reaction in water of an unsaturated anionic monomer, in the presence of CuI or of CuII and of an aromatic compound comprising a functional group chosen from hydroxyl, primary amine, secondary amine and tertiary amine directly bonded to the aromatic ring. The invention also relates to an aqueous composition comprising the polymer according to the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.