Claims
- 1. A liquid laundry starch concentrate comprising starch or starch derivatives suspended in an aqueous xanthan solution wherein said concentrate contains ethanol and a quaternary ammonium compound corresponding to general formula (1):R1R2(CH3)2N+A− (1) in which R1 and R2 represent n-decyl groups, and A− is charge-equalizing anion.
- 2. A concentrate as in claim 1 wherein said starch is selected from the group consisting of corn starch, rice starch, potato starch and tapioca starch and is present in native form or in thermally, hydrolytically or oxidatively degraded form.
- 3. A concentrate as in claim 1 wherein said starch or starch derivatives are present in a quantity of 10% by weight to 50% by weight, based on the weight of said concentrate.
- 4. A concentrate as in claim 1 wherein said xanthan is present a quantity of 0.1% by weight to 2% by weight, based on the weight of said concentrate.
- 5. A concentrate as in claim 1 wherein said ethanol is present in a quantity of 1% by weight to 10% by weight and, said quaternary ammonium compound is present in a quantity of 0.002% by weight to 0.5% by weight, based on the weight of said concentrate.
- 6. A concentrate as in claim 1 containing 40% by weight to 90% by weight of water, based on the weight of said concentrate.
- 7. A concentrate as in claim 1 having a viscosity at room temperature of 500 mPa·s to 10,000 mPa·s.
- 8. A concentrate as in claim 1 wherein A− is a charge-equalizing anion selected from the group consisting of a halide, methosulfate and ethosulfate.
- 9. A concentrate as in claim 1 wherein said ethanol and said quaternary ammonium compound are present in a weight ratio of 5,000:1 to 1:1.
- 10. A concentrate as in claim 1, wherein the quaternary ammonium compound comprises didecyl dimethyl ammonium halide.
- 11. A concentrate as in claim 10, wherein the didecyl dimethyl ammonium halide comprises didecyl dimethyl ammonium chloride.
- 12. The process of preserving a liquid laundry starch concentrate containing starch or starch derivatives suspended in a aqueous xanthan solution, comprising adding to said concentrate ethanol and quaternary ammonium compound corresponding to general formula (1):R1R2(CH3)2N+A− (1) in which R1 and R2 represent n-decyl groups, and A− is a charge-equalizing anion.
- 13. A process as in claim 12 wherein said starch is selected from the group consisting of corn starch, rice starch, potato starch and tapioca starch and is present in native form or in thermally, hydrolytically or oxidatively degraded form.
- 14. A process as in claim 12 wherein said starch or starch derivatives are present in a quantity of 10% by weight to 50% by weight, based on the weight of said concentrate.
- 15. A process as in claim 12 wherein said xanthan is present in a quantity of 0.1% by weight to 2% by weight based on the weight of said concentrate.
- 16. A process as in claim 12 wherein said ethanol is present in quantity of 1% by weight to 10% by weight and said quaternary ammonium compound is present in a quantity of 0.002% by weight to 0.5% by weight, based on the weight of said concentrate.
- 17. A process as in claim 12 wherein said concentrate contains 40% by weight to 90% by weight of water, based on the weight of said concentrate.
- 18. A process as in claim 12 wherein said concentrate has a viscosity at room temperature of 500 mPa·s to 10,000 mPa·s.
- 19. A process as in claim 12 wherein A− is a charge-equalizing anion selected from the group consisting of a halide, methosulfate and ethosulfate.
- 20. A process as in claim 12 wherein said ethanol and said quaternary ammonium compound are present in a weight ratio of 5,000:1 to 1:1.
- 21. A process as in claim 12, wherein quaternary ammonium compound comprises didecyl dimethyl ammonium halide.
- 22. A process as in claim 21, wherein the didecyl dimethyl ammonium halide comprises didecyl dimethyl ammonium chloride.
Priority Claims (1)
Number |
Date |
Country |
Kind |
196 25 828 |
Jun 1996 |
DE |
|
Parent Case Info
This application is a 371 of PCT/EP97/03221 filed Jun. 20, 1997.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/EP97/03221 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO98/00599 |
1/8/1998 |
WO |
A |
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3692552 |
Rueggeberg |
Sep 1972 |
A |
Foreign Referenced Citations (2)
Number |
Date |
Country |
19 40 655 |
Sep 1986 |
DE |
WO8605509 |
Sep 1986 |
WO |
Non-Patent Literature Citations (2)
Entry |
Dr. Otto-Albrecht Neumueller, “Roempps Chemie-Lexikon, Achte, neubearbeitete und erweiterte Auflage”,Stuttgart, (1987) no month provided pp. 3438-3439. |
J. Biochemical and Microbiological Technology & Engineering vol. III (1961) no month provided pp. 51-63 “Production of Polysaccharide with Xanthomonas Campestris”. |