Preparation of a low polydisperse water-soluble polymeric composition
US6143820A · kind A · utility
14Cited by
4References
7Claims
0Family size
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Key dates
| Filing date | Dec 18, 1998 |
| Grant date | Nov 7, 2000 |
| Priority date | — |
| Expiry date | Dec 18, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A water-soluble polymer having a low polydispersity index and controlled molecular weight can be prepared by oxidative degradation and shearing of a water-swellable crosslinked polymer or by hydrolysis of the crosslinked polymer to a high molecular weight soluble polymer, followed by oxidative degradation of the high molecular weight polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.