Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1996-02-22
1998-02-10
Einsmann, Margaret
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510372, 510424, 510426, 510383, C11D 339, C11D 183
Patent
active
057169241
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to aqueous bleaching formulations containing peroxide compounds, fatty alcohol ether sulfates, narrow-range fatty alcohol polyglycol ethers and electrolytes.
2. Discussion of Related Art
In the past, bleaching formulations based on hydrogen peroxide which show remarkable viscosity and, accordingly, are suitable both for treating horizontal surfaces and for treating sloping and, above all, vertical surfaces have been successfully used in the fields of hygiene and disinfection. The effect of the viscosity of these bleaching formulations is that the contact time between the bleaching formulation and the surface to be treated is considerably longer than in the case of commercial liquid products which quickly flow off from the surface.
Accordingly, there has been no shortage of attempts to provide viscous bleaching formulations of the type in question. Spanish patent application ES 88/1389 (Henkel Iberica), for example, proposes aqueous bleaching and disinfecting formulations based on alkali metal hypochlorites which are thickened by addition of fatty alcohol ether sulfates. However, ether sulfates are unsuitable on their own for adjusting the viscosity of bleaching formulations containing hydrogen peroxide. They give products of very low viscosity which turn cloudy at low temperatures and are not sufficiently stable in storage.
Accordingly, the problem addressed by the present invention was to provide new bleaching formulations containing peroxide compounds which would have an advantageous viscosity of at least 100 mPa.s, a cloud point of at least 20.degree. C. and high stability in storage.
DESCRIPTION OF THE INVENTION
The present invention relates to aqueous bleaching formulations containing
It has surprisingly been found that the addition of fatty alcohol ether sulfates, fatty alcohol polyglycol ethers and electrolyte salts in selected quantity ratios leads to excellent thickening of aqueous hydrogen peroxide solutions. The products obtained are extremely stable in storage both in regard to their viscosity and in regard to their peroxide content and have a cloud point of at least 20.degree. C.
Peroxide compounds in the context of the present invention are understood to be substances containing an O--O group. Typical examples are perborates, percarbonates, percarboxylic acids and, in particular, hydrogen peroxide. In a preferred embodiment, the aqueous bleaching formulations according to the invention contain hydrogen peroxide in quantities of 1 to 10% by weight, preferably 5 to 8% by weight and more preferably 6 to 7% by weight, based on 100% of active substance. The peroxide compounds are used, for example, in the form of a 35% by weight aqueous solution.
Fatty alcohol ether sulfates ("ether sulfates") are known anionic surfactants which are industrially produced by the sulfation of fatty alcohol polyglycol ethers with SO.sub.3 or CSA and subsequent neutralization.
According to the invention, suitable ether sulfates correspond to formula (I): containing 6 to 22 carbon atoms, m is a number of 1 to 10 and X is an alkali metal and/or alkaline earth metal, ammonium, alkylammonium, alkanolammonium or glucammonium.
Typical examples are the sulfates of adducts of on average 1 to 10 and, more particularly, 2 to 5 moles of ethylene oxide with caproic alcohol, caprylic alcohol, 2-ethylhexyl alcohol, capric alcohol, lauryl alcohol, isotridecyl alcohol, myristyl alcohol, cetyl alcohol, palmitoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, arachyl alcohol, gadoleyl alcohol, behenyl alcohol and erucyl alcohol and technical mixtures thereof in the form of their sodium and/or magnesium salts. The ether sulfates may have both a conventional homolog distribution and a narrow homolog distribution.
It is particularly preferred to use ether sulfates based on adducts of, on average, 2 to 3 moles of ethylene oxide with technical C.sub.12/14 or C.sub.12/18 cocofatty alcohol fractions in the fo
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J.Am.Oil.Chem.Soc. 67, pp. 599-604 (1990) (Sep.).
Seifen-Oele-Fette-Wachse, 117, 592 (1991) Sep.
Balaguer Angeles
Josa Jaume
Mendoza Mercedes
Osset Miguel
Einsmann Margaret
Grandmaison Real J.
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
Szoke Ernest G.
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