Bleach activators
US5985815A · kind A · utility
1Cited by
13References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1997 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Apr 3, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/3945
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
New compounds useful as bleach activators as well as new percarboxylic acids, which may be formed as intermediates upon reaction of such activators with peroxygen bleach source in aqueous solution, include nitrogen-containing heterocyclic groups. Preferred activators are symmetrical derivatives of dibasic carboxylic acids, having N,N'diacyl N-heterocyclic groups usually lactams. They are produced by reaction of 2 moles of the lactam with one mole of dibasic acid chloride or anhydride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.