Cellulose solution with low viscosity and process of preparing the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 27, 1999
Grant Date -
N/A
app pub date -
Feb 9, 1998
filing date -
Feb 9, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process for producing cellulose solution with low viscosity of 6,000-12,000 poises is disclosed. The process comprises the steps of kneading and dissolving raw cellulose material into a solvent mixture and an anti-polymerization degrading agent to form a cellulose solution which is spun to a fiber or a film of regenerated cellulose. The characteristics of the present process are that: a. the solvent mixture consists of 40-70 wt % of N-methyl morpholine oxide (NMMO), 20-50 wt % of N-methylol caprolactam (NMC) and 5-35 wt % of tetra methyl ammonium chloride (TMAC); b. the raw cellulose material is dissolved in the solvent mixture by assistance of a thin film evaporator at 80.degree. C. and 50-150 torr; and c. the anti-polymerization degrading agent is 1000 ppm to 1% of stearyl-3(3',5'-di-ter-4-hydroxyphenyl)propionate.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully