Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – With oxygen or halogen containing chemical bleach or oxidant...
Patent
1996-03-19
1998-04-07
Einsmann, Margaret
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
With oxygen or halogen containing chemical bleach or oxidant...
510375, 510421, 510422, 510424, 510426, 510427, 510476, 510477, 510533, 510318, 510238, 25218643, C11D 339, C11D 337, C11D 183
Patent
active
057364982
DESCRIPTION:
BRIEF SUMMARY
This invention concerns thickened peroxygen compositions, and more specifically, thickened aqueous alkaline hydrogen peroxide compositions, and processes for the production thereof.
During recent years, there has been considerable interest in the use of peroxygen compositions, particularly hydrogen peroxide compositions, as replacements for or alternatives to halogen-containing disinfectants and/or bleaches. Much interest has been focused on the use of alkaline hydrogen peroxide compositions, because of the known superior bleaching performance of such compositions compared with acidic hydrogen peroxide compositions.
Disinfectant and bleaching compositions, particularly, though not exclusively intended for domestic use are often employed to disinfect non-horizontal surfaces. It is therefore often desirable that such compositions are thickened, for example, in order to reduce the rate at which the compositions flow off the surfaces, thereby increasing the contact time with the composition.
Many common thickening agents for alkaline systems, for example xanthan gums and cellulose-based thickeners are not suitable for use with hydrogen peroxide on account of their being oxidatively degraded, and hence rapidly losing their thickening ability. One alternative thickening system that has been proposed by Akzo in European patent application no 0 265 979 is a combination of a quaternary ammonium compound plus a short chain alkylaryl sulphonate, such as sodium xylenesulphonate. Unfortunately, the use of quaternary ammonium compounds has come under pressure on environmental grounds because they commonly exhibit relatively poor biodegradability. Additionally, quaternary ammonium compound plus short chain alkylaryl sulphonate thickened systems commonly exhibit a high degree of viscoelasticity, thus possessing undesirable flow characteristics. To some extent, this problem can be avoided or ameliorated by the addition of a perfume, but in certain applications, it is undesirable to add a perfume.
It is an object of certain aspects of the present invention to provide thickened aqueous neutral or alkaline hydrogen peroxide compositions avoiding the problems of quaternary ammonium-based systems.
It is a second object of further aspects of the present invention to provide a process for the production of thickened aqueous neutral or alkaline hydrogen peroxide compositions which avoid the problems of quaternary ammonium-based systems.
According to one aspect of the present invention, there is provided neutral or alkaline thickened aqueous hydrogen peroxide compositions, characterised in that the compositions comprise an effective thickening amount of:
i. a polymer comprising a polyethylene backbone with pendant carboxylate groups and pendant groups having the general chemical formula: integer, n is zero or a positive integer, X and Y are independently selected from hydrogen atoms, methyl and ethyl groups and R is a hydrophobic group comprising 8 or more carbon atoms; and
ii. one or more surfactants selected from the group consisting of alcohol ethoxylates, alkylbenzenesulphonates comprising 10 or more carbon atoms, alkylsulphates comprising 6 or more carbon atoms, alcohol ether sulphates, alpha-sulphoesters and alkylglucosides.
According to a second aspect of the present invention, there is provided a process for the production of neutral or alkaline thickened aqueous hydrogen peroxide compositions, characterised in that to an aqueous hydrogen peroxide solution is added an effective thickening amount of:
i. a polymer comprising a polyethylene backbone with pendant carboxylate groups and pendant groups having the general chemical formula: integer, n is zero or a positive integer, X and Y are independently selected from hydrogen atoms, methyl and ethyl groups and R is a hydrophobic group comprising 8 or more carbon atoms; and
ii. one or more surfactants selected from the group consisting of alcohol ethoxylates, alkylbenzenesulphonates comprising 10 or more carbon atoms, alkylsulphates comprising 6 or more carbon atoms and alkylglu
REFERENCES:
patent: 4130501 (1978-12-01), Lutz et al.
Einsmann Margaret
Solvay Interox Limited
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