Thixotropic aqueous compositions containing long chain saturated fatty acid stabilizers
US5413727A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1991 |
| Grant date | May 9, 1995 |
| Priority date | — |
| Expiry date | Nov 8, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D17/003
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The physical stability of liquid gel-like compositions based on thixotropic thickener is greatly improved by incorporating in the composition small amounts of long chain fatty acids and salts thereof. The aqueous compositions containing inorganic builder salts and other functional inorganic salts, chlorine bleach, bleach stable detergent, at least one thixotropic thickener and a fatty acid or a metal salt of the fatty acid as a physical stabilizer exhibit a significant increase in apparent viscosity and remain stable against phase separation for an extended period of time. The thixotropic properties can be retained or improved using smaller levels of the thixotropic thickener than in the absence of the physical stabilizer. The stability, chlorine-bleach loss and cleaning ability of the compositions is further improved, when the composition pH is at least 11.2, when added to an aqueous wash both at a concentration of about 10 grams per liter. Use as liquid gel-like automatic dishwasher compositions are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.