Bleach catalyst granules, use thereof and washing cleaning agents containing the same
AssigneeWeylchem Wiesbaden GmbH
InventorsGerd Reinhardt, Michael Best, Miriam Ladwig, Andreas Schottstedt, Mathias Groeschen, Sven Gebhard
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Abstract
The invention relates to a bleach catalyst granules containing a metal-containing bleach catalyst, which comprises at least one ligand selected from the group comprising di- or trimethyltriazcyclononanes or derivatives therefrom, and a homo- or copolymer polycarboxylate, salts thereof or partially neutralized having a pH-value of between 3 and 9. Said granules are produced in an anhydrous granulation process, in particular by compacting, the treatment temperature being maintained at below 100° C.
Claims20
A bleach catalyst granule containing 0.01 to 50 wt %, relative to the overall weight of the granule, of a metal-containing bleach catalyst comprising at least one ligand from the group consisting of di- or trimethyltriazacyclononanes or derivatives thereof, and 50 to 99.9 wt %, relative to the overall weight of the granule, of a homo- or copolymer of (meth)acrylic acid or its salts or partial neutralizates having a pH between 3 and 9, as measured on a 1 wt % solution in water, characterized in that the granule is obtained in an anhydrous granulating process, wherein the processing temperature is maintained below 100° C.
The bleach catalyst granule as claimed in 1, characterized in that it has a protective or coating layer, wherein the proportion of the overall granule which is accounted for by the protective or coating layer is not less than 7 wt %, but not more than 30 wt %.
The bleach catalyst granule as claimed in 1, characterized in that it has a protective or coating layer, wherein the proportion of the overall granule which is accounted for by the protective or coating layer is not less than 15 wt %, but not more than 30 wt %.
Dependencies are inferred from the claim text.