Method of producing cellulose carbamate fibers or films
US4530999A · kind A · utility
15Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1984 |
| Grant date | Jul 23, 1985 |
| Priority date | — |
| Expiry date | Nov 1, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B15/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The production of cellulose carbamate fibers or films by reacting cellulose with urea to form cellulose carbamate which is dissolved in alkaline solution to form a spinning solution which is spun through an acid precipitation bath is improved by subjecting the cellulose carbamate prior to dissolution in alkaline solution to irradiation of about 0.05-10 Mrad. After dissolution in alkaline solution the same may be subjected to further mild irradiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.