Enzyme preparation containing a silver corrosion inhibitor
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsKathleen Paatz, Wilfried Raehse, Juergen Haerer, Werner Pichler, Birgit Burg
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Abstract
The invention provides an enzyme containing granule with a coating containing a silver corrosion inhibitor. The particle is formed from a core containing a first enzyme and an organic or inorganic carrier which can be coated with a second particulate enzyme. The core is coated with a coating containing at least one salt of manganese, titanium, zirconium, hafnium, vanadium, cobalt and cerium. A method for preparing the granule is also disclosed.
Claims20
An enzyme containing granule, suitable for incorporation in particulate detergents, which comprises:
- (1) a core which comprises the enzyme, at least one carrier material selected from the group consisting of inorganic carrier material and organic carrier material and optionally granulation auxiliaries;
- and
- (2) a coating layer which comprises a silver corrosion inhibitor which is not CoSO.sub.4.
A process for the production of enzyme containing granules with an average particle size of 0.8 mm to 1.2 mm suitable for incorporation in particulate detergents which comprises:
- (1) extruding an enzyme containing composition prepared by mixing a concentrated fermentation broth containing the enzyme, optionally freed from insoluble constituents by microfiltration, with at least one carrier material selected from the group consisting of inorganic and organic carrier material to form an extrudate comprising an enzyme containing core;
- (2) optionally spheronizing the extrudate in a spheronizer;
- (3) drying the extrudate;
- and
- (4) applying an outer coating layer, comprising a coating system containing at least 50% by weight of silver corrosion inhibitor, up to 25% by weight of fine-particle inorganic pigment, 5% by weight to 20% by weight of alcohol, solid at room temperature, with a melting point of 45.degree. C. to 65.degree. C., up to 5% by weight of emulsifier for the alcohol, up to 5% by weight of dispersant for the silver corrosion inhibitor or the inorganic pigment and up to 7% by weight of water in a fluidized bed of extrudate.
A low-alkali machine dishwashing detergent containing:
- (1) from 15% by weight to 60% by weight of water-soluble builder component, from 5% by weight to 25% by weight of oxygen-based bleaching agent, from 1 % by weight to 10% by weight of bleach activator, from 0.1% by weight to 10% by weight of the enzyme containing granules comprising a core, comprising at least one enzyme and at least one carrier selected from the group consisting of inorganic and organic carrier material and optionally granulation auxiliaries and a coating layer containing a silver corrosion inhibitor.
Dependencies are inferred from the claim text.