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Dishwashing liquid having bleaching catalyst and protease

a technology of bleaching catalyst and dishwashing liquid, which is applied in the direction of detergent compounding agent, enzymology, viruses/bacteriophages, etc., can solve the problems of inability to satisfactorily remove, intractable stains, and the inability of modern dishwashing agents, especially automatic dishwashing agents, to meet the set requirements for the elimination of such stains

Inactive Publication Date: 2014-04-17
HENKEL KGAA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a dishwashing agent that contains a hydrogen peroxide source, a bleach catalyst, and a protease. The protease in this agent has a migration distance that is longer than a specific protease in a polyacrylamide gel. The patent also describes a method for using this dishwashing agent to remove stains, such as tea stains, from hard surfaces like dishes. The results were improved stain removal compared to using a different dishwashing agent without the protease.

Problems solved by technology

Bleachable stains, especially tea stains, represent intractable stains, however, which are often not satisfactorily removed.
Modern dishwashing agents, especially automatic dishwashing agents, often do not satisfy the set requirements in regard to the elimination of such stains.

Method used

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  • Dishwashing liquid having bleaching catalyst and protease
  • Dishwashing liquid having bleaching catalyst and protease
  • Dishwashing liquid having bleaching catalyst and protease

Examples

Experimental program
Comparison scheme
Effect test

example 1

Determination of the Migration Distance of Proteases

[0176]The migration distance of four proteases was determined against the protease according to SEQ ID NO: 1 in a native polyacrylamide electrophoresis. The PHASTSystem from GE Healthcare was used for this. Polyacrylamide native “PhastGel Gradient 8-25” gels with a size of 43×50×0.45 mm were used as the separation gel, combined with a 0.112M Tris, 0.112M acetate (pH 6.4) buffer, whose native buffer strips of 3% agarose were upstream as the stacking gel with a size of 41×10×6 mm, combined with a 0.25M Tris, 0.88M L-alanine (pH 8.8) buffer. The separation was carried out following the instructions of the manufacturer as described in “PhastSystem Separation Technique File No. 120” (Amersham Biosciences 1998), but in the “reversed polarity electrode mode” for the separation of basic proteins. The electrophoresis was carried out until the protease bands had covered at least half of the available path length in the separation gel.

[0177]T...

example 2

Determination of the Cleaning Power of the Dishwashing Agents According to the Invention

[0178]The cleaning power of a commercially available automatic dishwashing agent in the form of a dishwashing agent tablet was tested on tea stains; the tablet contained 15 wt sodium percarbonate as the hydrogen peroxide source (bleaching agent), 0.03 wt % Mn-Me-TACN (Mn-TACN) as the bleach catalyst and 2.2 wt % TAED as the bleach activator, to which were added protease granulates with different proteases according to Example 1. The proteases were employed in amounts of equal total protein (0.056 g protease per wash cycle). The dishwashing process was carried out in the Miele G698SC dishwasher (program: 50° C., program duration 57 min, water hardness 21 (German hardness). The dishwashing agent tablet was placed in the dispensing device prior to the beginning of the cleaning program.

[0179]Triple determinations were carried out. Each experiment was counted and used to form the average value. The cl...

example 3

Determination of the Cleaning Power of the Dishwashing Agents According to the Invention

[0181]The cleaning power of a commercially available automatic dishwashing agent in the form of a dishwashing agent tablet was tested on tea stains; the tablet contained 15 wt % sodium percarbonate as the hydrogen peroxide source (bleaching agent), 2.2 wt % TAED as the bleach activator and 0.03 wt % Mn-Me-TACN (Mn-TACN) as the bleach catalyst, to which were added protease granulates with different proteases according to Example 1. The proteases were again employed in amounts of equal total protein (0.056 g protease per wash cycle). The additional composition of the dishwashing agent tablets corresponded to those of Example 2. The procedure and evaluation were carried out as described in Example 2. The results are presented below in Table 3.

TABLE 3Dishwashing agent tablet thatcontains sodium percarbonateTeaWith protease 1 without Mn-TACN4.8With protease 1 with Mn-TACN5.7With protease 4 without Mn-...

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Abstract

In a dishwashing liquid, the cleaning performance, in particular on bleachable stains such as, for example, tea stains, is to be improved. This succeeds using a dishwashing liquid which comprises a hydrogen peroxide source, a bleaching catalyst and a protease that, in native electrophoresis on a polyacrylamide gel, has a migration distance that is longer than the migration distance of the protease as per SEQ ID NO. 1.

Description

FIELD OF THE INVENTION[0001]The present invention generally relates to dishwashing agents, and more particularly relates to bleach-containing dishwashing agents that comprise proteases, as well as to methods, in which such agents are used. The invention further relates to uses of such agents.BACKGROUND OF THE INVENTION[0002]Dishwashing agents are available to the consumer in numerous presentation forms. Besides the traditional liquid hand dishwashing agents, the automatic dishwashing agents in particular have become highly important as a result of the growing use of automatic dishwashers. These automatic dishwashing agents are typically offered to the consumer in solid form, for example as a powder or as tablets.[0003]One of the main aims of the manufacturer of automatic cleaning agents is to improve the cleaning performance of these agents, wherein recently greater emphasis has been focused on the cleaning performance in low temperature cleaning cycles or in cleaning cycles with a ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C11D3/386
CPCC11D3/38609C11D3/38618C11D3/386C11D3/3932C12N9/50C12Y304/00C12N15/86C11D2111/14C11D3/3942C11D17/0047
Inventor MUSSMANN, NINAEITING, THOMASBASTIGKEIT, THORSTENBENDA, KONSTANTINHELLMUTH, HENDRIKWEBER, THOMAS
Owner HENKEL KGAA
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