Bleach activators
US5840667A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1997 |
| Grant date | Nov 24, 1998 |
| Priority date | — |
| Expiry date | Feb 5, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/3945
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A bleach composition comprises a peroxygen bleach source (for instance hydrogen peroxide, a perborate or a percarbonate salt) and an activator of the formula I: ##STR1## in which X is O or S; one of E and G is --A-- and the other is --N(R.sup.2)--; PA1 A is --O-- or --S--; PA1 R.sup.1 is a C.sub.1-50 alkylene group (including cyclo alkylene), optionally interrupted by an arylene group and/or by one or more ether, ester, anhydride, thioether, secondary or tertiary amine, amide or imide linkage, an arylene group or an alkarylene group; PA1 R.sup.2, is selected from H, alkyl, aralkyl, alkaryl and aryl; PA1 R.sup.3 is alkyl, aralkyl, alkaryl or aryl, or, when E is --N(R.sup.2)--, H; PA1 in which R.sup.2 and R.sup.3 can be joined so as to form a heterocyclic ring with the atoms to which they are attached, and/or in which R.sup.1 can be joined with R.sup.2 or R.sup.3 ; and PA1 L is a leaving group which may optionally be joined to any of R.sup.1, R.sup.2 and R.sup.3. The activator gives the composition good bleaching at low temperatures, minimal dye and fabric damage and which bleach a wide range of oxidisable stains.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.