Polysaccharide aldehydes prepared by oxidation method and used as strength additives in papermaking
US6586588B1 · kind B1 · utility
46Cited by
13References
18Claims
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Key dates
| Filing date | Aug 10, 2000 |
| Grant date | Jul 1, 2003 |
| Priority date | — |
| Expiry date | Aug 10, 2020 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polysaccharide aldehydes are prepared using selective oxidation involving the use of nitroxyl radical mediated aqueous oxidation with a limited amount of oxidant and defined reaction conditions. These polysaccharide aldehyde derivatives having maximum effective aldehyde and minimal carboxylic acid levels making them especially useful as wet, temporary wet and dry strength additives for paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.