Cellulose carbamate solutions
US4526620A · kind A · utility
16Cited by
4References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1983 |
| Grant date | Jul 2, 1985 |
| Priority date | — |
| Expiry date | Nov 30, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/21
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to cellulose carbamate solutions having improved capacity for fiber spinning or film formation therefrom. The addition of urea to the aqueous alkali in which the cellulose carbamate is dissolved results in an increase in the amount of cellulose carbamate that can be dissolved and a decrease in the viscosity and clogging number of the solution as compared to such solutions without urea.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.