Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1998-01-23
1999-07-27
Fries, Kery
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510283, 510284, 510292, 510309, 499502, 499533, 499506, 499352, 8137, C11D 3395, C11D 7122, C11D 129, C11D 324
Patent
active
059290129
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to the pretreatment of soiled fabrics, to compositions suitable to be used as pretreater, and to a pretreatment process.
BACKGROUND
Peroxygen bleach-containing compositions have been extensively described in laundry applications as laundry detergents, laundry additives or even laundry pretreaters.
Indeed, it is known to use such peroxygen bleach-containing compositions in laundry pretreatment applications to boost the removal of encrusted stains/soils which are otherwise particularly difficult to remove such as grease, coffee, tea, grass, mud/clay-containing soils and the like. However, we have found that a drawback associated with such peroxygen bleach-containing compositions is that said compositions may damage fabrics when used in pretreatment application, i.e. when applied directly onto the fabrics, and left to act onto said fabrics for prolonged periods of time before washing said fabrics.
It is thus an object of the present invention to provide improved fabrics safety when pretreating fabrics with peroxygen bleach-containing compositions, especially in those applications where said compositions are left into contact with said fabrics during prolonged periods of time, before washing said fabrics.
When pretreating fabrics with compositions comprising a peroxygen bleach like hydrogen peroxide, it has been found that the presence of metal ions such as copper and/or iron and/or manganese on the surface of fabrics produces fabric damage resulting in loss of tensile strength of the fabric fibres. It is speculated that the presence of metal ions such as copper and/or iron and/or manganese on the surface of the fabrics, especially on cellulosic fibres, catalyses the radical decomposition of peroxygen bleaches like hydrogen peroxide. Thus, a radical reaction occurs on the surface of the fabric with generation of free radicals, which results in tensile strength loss.
Therefore we have found that it is essential that this surface radical reaction be controlled in the pretreatment environment, thereby providing improved safety to fabrics.
It has now been found that this can be achieved by formulating a peroxygen bleach-containing composition which comprises a compound for chelating copper and/or iron and/or manganese. More particularly, it has been found that the use of a compound for chelating copper and/or iron and/or manganese, and preferably diethylene triamine penta methylene phosphonic acid (DTPMP), hydroxy-ethane diphosphonic acid (HEDP), ethylenediamine N,N'-disuccinic acid (EDDS), methyl glycine di-acetic acid (MGDA), diethylene triamine penta acetic acid (DTPA), propylene diamine tetracetic acid (PDTA), 2-hydroxypyridine-N-oxide (HPNO), or ethylenedinitrilotertrakis (methylenephosphonic acid) N,N,-dioxide, in a peroxygen bleach-containitng composition, considerably reduces the damage on a fabric pretreated with such a composition.
An advantage associated to the use of a peroxygen bleach-containing composition comprising such a compound for chelating copper and/or iron and/or manganese, in laundry pretreatment application, is that color damage is also reduced.
A further advantage of the present invention is that excellent laundry performance on bleachable stains is provided as well as on removing greasy stains.
Another advantage of the present invention is that the compositions suitable to be used according to the present invention also provide excellent performance when used in other applications, apart from laundry pretreater application, such as in other laundry applications, as a laundry detergent or laundry additive, or even in hard surface cleaning applications.
In one embodiment of the present invention it has also been found that the use of a chelating agent like ethylenedinitrilotertrakis (methylenephosphonic acid) N,N,-dioxide, hydroxy-ethane diphosphonic acid (HEDP) and/or a chelating agent having two electron-donor groups able to occupy adjacent co-ordination sites in the metal ions sphere of co-ordination so as to form complexes with metal io
REFERENCES:
patent: 3655569 (1972-04-01), Hellsten et al.
patent: 3676338 (1972-07-01), Fries et al.
patent: 3686126 (1972-08-01), Smeets
patent: 3844951 (1974-10-01), Fries et al.
patent: 4595527 (1986-06-01), Gipp
patent: 4690771 (1987-09-01), Ouhadi et al.
patent: 4704233 (1987-11-01), Hartman et al.
patent: 4749516 (1988-06-01), Brusky
patent: 4753750 (1988-06-01), Ouhadi et al.
patent: 4756849 (1988-07-01), Weber et al.
patent: 4889652 (1989-12-01), Sullivan et al.
patent: 4900468 (1990-02-01), Mitchell et al.
patent: 5118436 (1992-06-01), Aoyagi et al.
patent: 5186856 (1993-02-01), Holland
patent: 5221496 (1993-06-01), Holland
patent: 5523013 (1996-06-01), Durbut et al.
patent: 5648326 (1997-07-01), Sramek
patent: 5652208 (1997-07-01), Sramek
Del Duca Valerio
Park John Scott
Rapisarda Dario
Stoddart Barry
Trani Marina
Cook C. Brant
Fries Kery
Procter & Gamble Company
Rasser Jacobus C.
Zerby Kim W.
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