Bleaching detergent composition containing acylated sugar bleach activators
AssigneeNovo Nordisk A/S
InventorsTure Damhus, Ole Kirk, Frederick E. Hardy
Life of this patent
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Abstract
Esters of monosaccharides and their lower alkyl glycosides are effective both as suffactants and as bleach activators (peracid precursors). The compounds are non-toxic and biodegradable. They act as nonionic suffactants and are effective in soil removal from textiles, e.g. of fatty soiling. In the presence of a hydrogen peroxide source, the sugar derivatives are perhydrolyzed during the washing process to form long-chain peracid. This enhances the bleaching effect, especially on hydrophobic stains.
Claims23
A bleaching detergent composition comprising:
- (a) 1-90% by weight, calculated as % sodium perborate monohydrate, of a source of hydrogen peroxide and
- (b) 5-90% by weight of a compound of formula (R--CO).sub.n XR'.sub.y, wherein
- X is a penlose or hexose,
- R--CO is an unsubstituted C.sub.6 -C.sub.20 fatty acyl group attached through an ester bond to X,
- n is 1 or 2,
- R' is a C.sub.1 -C.sub.4 alkyl group, attached through a glycosidic bond to the anomeric carbon of X, and
- y is 0 or 1.
A process for washing and bleaching a stained textile, comprising treating the textile in the presence of effective washing and bleaching amounts of a source of hydrogen peroxide and of a compound of formula (R--CO).sub.n XR'.sub.y, wherein
- X is a pentose or hexose,
- R--CO is an unsubstituted C.sub.6 -C.sub.20 fatty acyl group attached through an ester bond to X,
- n is 1 or 2,
- R' is a C.sub.1 -C.sub.4 alkyl group, attached through a glycosidic bond to X, and
- y is 0 or 1.
Dependencies are inferred from the claim text.