Ester perhydrolysis by preconcentration of ingredients
US5143641A · kind A · utility
75Cited by
8References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 14, 1990 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Sep 14, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D17/042
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A bleaching composition in concentrated form is provided that includes a peroxygen compound and an organic bleach precursor. The precursor is selected from esters and carbonates having a leaving group whose conjugate acid has a pKa of greater than 13. Particularly preferred are quaternary ammonium functionalized compounds. Absent preconcentration of the components, poor bleaching would result. Concentrated compositions may be achieved through use of encapsulation or by way of a sachet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.