Process for preparing vinylpyrrolidone polymer
US6465592B1 · kind B1 · utility
2Cited by
8References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2001 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Aug 3, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F226/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A vinylpyrrolidone polymer which is little colored, gives off a bad smell little, and contains extremely little impurities is provided. The polymerization is performed by adding a water-soluble organic peroxide and a sulfite to a vinylpyrrolidone aqueous solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.