Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1996-12-04
1998-06-02
Lieberman, Paul
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510309, 510311, 510351, 510357, 510371, 510372, 510504, C11D 165
Patent
active
057599815
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a process for treating textiles and liquid detergent compositions for use in said process. The compositions of the present invention comprise a bleaching system.
BACKGROUND OF THE INVENTION
The object of the present invention is to provide a process for the treatment of textiles, whereby the textiles are contacted in an aqueous medium with a bleaching system and optionally a metallo catalyst. The bleach and metallo catalyst in combination serve as a bleaching system or as a dye transfer inhibition system. It is a further object of the present invention to provide a composition suitable for use in the above process.
It is highly desirable that the textiles are contacted with an aqueous medium that comprises certain anionic species such as anionic surfactants, builders and the like, as this results in improved cleaning. Anionic species present in the medium need to be neutralized, by a neutralizing system. Often, the anionic species, especially anionic surfactants are incorporated into detergent compositions already neutralized. Other anionic species such as builders may be neutralized in the composition or more rarely in the aqueous medium itself which is contacted with the textiles. If, for example the anionic surfactant is not neutralized during the wash and is allowed to remain acidic, the cleaning performance of the composition will be impaired and the whiteness performance of the composition will be detrimentally affected. Thus, the neutralizing system is a vital constituent in the medium. Commonly described neutralizing system used for anionic species in the art, include sodium hydroxide and alkanolamines in general particularly monoethanolamine. However when considering the choice of neutralizing systems the other ingredients' compatibility in the wash liquor must be considered.
One such ingredient is a bleach, which is required for improving the cleaning and whiteness performance of the wash process. In addition the bleaching system is required for the bleaching of fabrics and as well as stains on fabrics. In particular the presence of a bleach maybe used in combination with a metallo catalyst to provide the bleaching system.
Unfortunately, we have now found that the bleach can oxidize alkanolamines such as monoethanolamine and is therefore incompatible with the organic neutralizing agents. This problem occurs whenever the bleach and the monoethanolamine come in contact with one another. Thus, this problem may occur in the composition formulation and in the aqueous medium of the wash liquor, if for example the bleach and the monoethanolamine are kept separate until the wash process begins. Therefore, monoethanolamine was not found to be a suitable neutralizing system.
In addition to providing whiteness bleaching benefits, bleach in combination with a metallo catalyst provide the benefit of preventing the transfer of dyes from one textile to another during the wash and thereby improving whiteness maintenance. Therefore it is highly desirable that these ingredients are incorporated in the aqueous medium. Such DTI systems have been disclosed in for example the copending European Patent Application Nos.: 92870181, 92870184.6 and 92870183.8. However there are a number of problems associated with the presence of DTI systems. In the aqueous medium the metallo catalyst is activated by the bleach and it is this activated species which inhibits dye transfer. We have now found that this species is very sensitive to the other components in the aqueous medium, particularly the neutralizing system for the anionic species. For example monoethanolamine and all other alkanolamines immediately deactivate the activated metallo catalyst and thus are not suitable for the present invention.
In response to these objectives it has now been found that neutralizing systems for the neutralization of anionic species comprising quaternary ammonium cations according to the formula: ##STR1## wherein R.sub.1 -R.sub.4 are independently C.sub.1 -C.sub.6 alkyl, phe
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patent: H1468 (1995-08-01), Costa et al.
patent: 5174927 (1992-12-01), Honsa
patent: 5223179 (1993-06-01), Connor et al.
patent: 5445651 (1995-08-01), Thoen et al.
patent: 5560748 (1996-10-01), Surutzidis et al.
Boutique Jean-Pol
Glogowski Mark William
Hardy Frederick Edward
Johnston James Pyott
Labeque Regine
Hardee John R.
Lieberman Paul
Patel Ken K.
Rasser Jacobus C.
The Procter & Gamble & Company
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