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Cleaning effects with salicylidene acylhydrazones in peroxide free detergent formulations

IP.com Disclosure Number: IPCOM000246852D
Publication Date: 2016-Jul-07

Publishing Venue

The IP.com Prior Art Database

Abstract

Salicylidene acylhydrazones are well-known bleach catalysts for low temperature detergent applications. The present publication relates to their use as oxidation catalysts and to a process for removing stains and soil on textiles and hard surfaces in both home care and industrial / institutional cleaning. Further aspects of the publication are compositions or formulations comprising such compounds. Surprisingly, it has now been found, that certain salicylidene acylhydrazones show significant cleaning effects in peroxide-free, alkaline formulations at low temperature (30°C and below) leading to considerable cleaning benefits over a multitude of stains. This effect is most prominent for aqueous liquid detergent formulations. Furthermore, cleaning benefits can also be found for powder detergents systems.

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Cleaning effects with salicylidene acylhydrazones in peroxide free detergent formulations

Description

Salicylidene acylhydrazones are well-known bleach catalysts for low temperature detergent applications. The present publication relates to their use as oxidation catalysts and to a process for removing stains and soil on textiles and hard surfaces in both home care and industrial / institutional cleaning. Further aspects of the publication are compositions or formulations comprising such compounds.

In WO09124855 and WO12080088 salicylidene acylhydrazones are described as bleach catalysts in home care applications. Typically, additional species of peroxidic nature (e.g. peroxide compounds and/or peroxide-forming substances) need to be present in the formulation to ensure sufficient bleach performance, as salicylidene acylhydrazones are primarily considered to enhance the action of H2O2 and/or peroxides.

To date, the formulation of peroxidic compounds and/or peroxide-forming substances remains challenging as the components rapidly decompose in alkaline aqueous media. Therefore, the shelf life of peroxidic components in liquid detergent formulations with alkaline pH is very limited. Today's commercial liquid detergents are formulated without hydrogen peroxide or a precursor of hydrogen peroxide because these would be rapidly destroyed in the aqueous medium, and, additionally, other ingredients, such as fragrants or enzymes would be oxidized under these conditions. So far, the only commercially marketed formulations containing peroxide are those for liquid bleach booster systems, typically employing an acidic pH range, which is known to slow down peroxide decomposition. This pH range, however, limits the utility of these formulations for main wash products because a large part of the cleaning action in laundry is derived from the alkalinity in the wash bath.1 Therefore, the removal of bleachable stains remains a challenge for liquid detergent formulations.

Surprisingly, it has now been found, that certain salicylidene acylhydrazones show significant cleaning effects in peroxide-free, alkaline formulations at temperatures of 30°C and below leading to considerable cleaning benefits over a multitude of stains. This effect is most prominent for aqueous liquid detergent formulations. Furthermore, cleaning benefits can also be found for powder detergents systems.

These compounds can be used in the treatment of textile materials, without at the same time causing any appreciable damage to fibers, dyeings and textiles. There is also no appreciable damage to fibers, dyeings and textilesif these compounds are used in combination with an enzyme or a mixture of enzymes.

The bleaching of the fabric can happen during and/or after the treatment of the fibre with the formulation, which comprises the compounds.

Metal ions, such as aluminium, zink, manganese, titanium, iron, cobalt, nickel or cop-per, for example Al(III), Zn(II), Mn(II)-(III)-(IV)-(V...