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US 5,858,949 AGranted
N-acylimines as bleach catalysts
AssigneeLever Brothers Company, Division of Conopco, Inc.
InventorKarl Friedrich Moschner
Life of this patent
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Abstract
Novel bleaches, a method for bleaching substrates using these materials and bleaching compositions containing same are reported. The bleaches are N-acylimines. Substrates such as fabrics may be bleached in an aqueous solution containing the N-acylimines and a peroxygen compound.
Claims11
A bleaching composition comprising:
- (i) from 1 to 60% by weight of a peroxygen compound;
- (ii) from 0.01 to 10% by weight of an oxygen transfer agent whose structure is:
- R.sup.1 R.sup.2 C.dbd.NCOR.sup.3
- wherein:
- R.sup.1 may be hydrogen or a C.sub.1 -C.sub.40 substituted or unsubstituted radical selected from the group consisting of phenyl, aryl, acyl, heterocyclic ring, alkyl and cycloalkyl radicals;
- R.sup.2 may be hydrogen or a C.sub.1 -C.sub.40 substituted or unsubstituted radical selected from the group consisting of phenyl, aryl, heterocyclic ring, alkyl, cycloalkyl, R.sup.1 C.dbd.NCOR.sup.3, nitro, halo, cyano, alkoxy, keto, carboxylic and carboalkoxy radicals;
- R.sup.3 may be a C.sub.1 -C.sub.40 substituted or unsubstituted radical selected from the group consisting of phenyl, aryl, heterocyclic ring, alkyl, cycloalkyl, nitro, halo and cyano radicals,
- R.sup.1 with R.sup.2 and R.sup.2 with R.sub.3 may respectively together independently form a cycloalkyl, heterocyclic, and aromatic ring system, and
- (iii) from 0.5 to 50% by weight of a surfactant.
6 more elements
Dependencies are inferred from the claim text.