Claims
- 1. A nonionic associative cellulose ether comprising a modifying hydrophobic group of the formula wherein R is an aliphatic group of 12-22 carbon atoms and n is a number from 3 to 7, with a degree of substitution of 0.003 to 0.012.
- 2. The cellulose ether of claim 1 wherein having a viscosity of 20-15000 mPa.s in a 1% water solution at 20° C.
- 3. The cellulose ether of claim 1 having a DP viscosity of 15-200 mPa.s.
- 4. The cellulose ether of claim 3 having a degree of substitution of from 0.003 to 0.012.
- 5. The cellulose ether of claim 1 wherein the cellulose ether is a modified water-soluble alkyl cellulose, hydroxyalkyl cellulose or alkyl hydroxyalkyl cellulose.
- 6. The cellulose ether of claim 5 wherein the cellulose ether is a modified methyl hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, methyl ethyl hydroxyethyl cellulose, or hydroxyethyl cellulose.
- 7. The cellulose ether of claim 1 having a DP viscosity of 20-100 mPa.s.
- 8. The cellulose ether of claim 1 having a viscosity of 100-12000 mpa.s measured in 1% water solution at 20° C.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9802676 |
Aug 1998 |
SE |
|
Parent Case Info
The present case claims priority of Swedish application No. 9802676-8 filed on Aug. 6, 1998 and of U.S. provisional application serial No. 60/097,597 filed Aug. 24, 1998.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4228277 |
Landoll |
Oct 1980 |
|
5140099 |
Bostrom et al. |
Aug 1992 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
0 390 240 A1 |
Oct 1990 |
EP |
0 390 240 B1 |
Oct 1990 |
EP |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/097597 |
Aug 1998 |
US |