Wash cycle unit dose softener
US6291421A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2000 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Oct 9, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D17/044
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A unit dose wash cycle fabric softening composition for softening or conditioning fabrics in the wash cycle of an automatic washing machine, said unit dose comprising (a) a compacted granular fabric softener composition, the amount of (a) being sufficient to form a unit dose capable of providing effective softening or conditioning of fabrics in the wash cycle of said washing machine, and wherein said fabric softener composition comprises a treated montmorillonite-containing clay selected to have initial properties as follows: PA1 (i) a montmorillonite content of at least 85%; and PA1 (ii) when said clay is activated with sodium ions, dried and ground to particles, said ground particles do not swell more than about 2.5 fold over a period of 24 hours when added to deionized water at room temperature; and wherein said montmorillonite-containing clay is treated by the process comprising the following sequential steps: PA2 (a) drying said clay to a moisture content of from about 25 to about 35%, by weight; PA2 (b) extruding the dried material through a die to form a paste; PA2 (c) drying said paste to a moisture content of from about 10% to about 14% by weight; and PA2 (d) calcining at …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.