Procedure for producing soluble cellulose derivatives
US4486585A · kind A · utility
52Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1983 |
| Grant date | Dec 4, 1984 |
| Priority date | — |
| Expiry date | Aug 30, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23G2201/303
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention concerns a procedure for producing cellulose carbamate from cellulose and urea. To avoid alkali treatment of the cellulose used as starting material with a view to decreasing the degree of polymerization of the cellulose, the cellulose in web form is exposed to a radiation dose of preferably 0.5 to 10 Mrad from a radiation source, whereafter the cellulose is reacted with urea at elevated temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.