Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1997-04-28
2000-07-18
Ogden, Necholus
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510237, 510426, 510428, 510470, 510492, 134 251, 134 252, C11D 1700
Patent
active
060907649
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to the use of glycerol sulfates in water-based manual dishwashing detergents which combine intensive foaming with high cleaning power.
2. Discussion of Related Art
Liquid cleaning formulations generally consist of aqueous solutions of synthetic anionic and/or nonionic surfactants and typical additives. They are used in particular for cleaning hard surfaces, for example glass, ceramic materials, plastics, painted and polished surfaces. An important application for liquid cleaning formulations is manual dishwashing. Dishwashing is normally carried out in highly dilute liquors at slightly elevated temperatures of around 35 to 45.degree. C. Consumers generally consider the cleaning performance of a dishwashing detergent to be better, the more intensively and the longer the cleaning liquor foams. Because the hands come into contact with the cleaning liquor over a prolonged period, the skin compatibility of the detergent is another factor of considerable significance in manual dishwashing. For these reasons, the choice of the components for and composition of a manual dishwashing detergent involve other factors than the same choice for liquid cleaners for other hard surfaces.
In the recent past, increasing efforts have been made to increase the surfactant content of manual dishwashing detergents in order to obtain so-called concentrates. The development of concentrates generally involves the problem that the high surfactant content required cannot be achieved on account of solubility limits.
The problem addressed by the present invention was to provide detergent formulations, more particularly water-based manual dishwashing detergents, having a high overall surfactant content.
DESCRIPTION OF THE INVENTION
According to the invention, this problem has been solved by the use of glycerol sulfates as solubilizers. Glycerol sulfates are suitable solubilizers in particular for total surfactant contents of more than 25% by weight and preferably more than 33% by weight, based on the manual dishwashing detergent as a whole.
Trisulfated glycerol is particularly suitable for the purposes of the invention, although monosulfated or disulfated glycerol and mixtures thereof are also suitable solubilizers. The glycerol sulfate may be prepared, for example, by reaction of glycerol with gaseous SO.sub.3. A synthesis procedure is disclosed in the Examples.
Particularly suitable surfactants are Cr.sub.6-22 alkyl sulfates and/or Cr.sub.6-22 alkyl ether sulfates and/or C.sub.9-13 alkyl benzene sulfonates.
Accordingly, the present invention also relates to the use of glycerol sulfates in water-based manual dishwashing detergents containing C.sub.6-22 alkyl sulfates and/or C.sub.6-22 alkyl ether sulfates and/or C.sub.9-13 alkyl benzene sulfonates.
Fatty alkyl sulfates (FAS) which may be used for the purposes of the invention correspond to formula II: is an alkali metal or alkaline earth metal.
These substances are known chemical compounds which may be obtained by sulfation of fatty alcohols. Typical examples are the sulfates of caproic alcohol, caprylic alcohol, capric alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, palmitoleyl alcohol, stearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, arachyl alcohol, gadoleyl alcohol, behenyl alcohol and erucyl alcohol and technical mixtures thereof. Sulfates of technical C.sub.12/14 or C.sub.12/18 coconut fatty alcohol cuts in the form of their sodium or magnesium salts are preferably used.
Fatty alkyl ether sulfates (FAES) which may be used for the purposes of the invention correspond to formula III: a number of 1 to 10 and X is an alkali metal or alkaline earth metal.
These substances are also known chemical compounds which may be obtained by sulfation of fatty alcohol polyglycol ethers. Narrow-range FAES (NRE=narrow range ethoxylates) which are described, for example, in International patent application WO 91/05764 and in the article by D. L. Smith in J. Am. Oil Chem. Soc. 68, 629 (1991)
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Behler Ansgar
Hees Udo
Grandmaison Real J.
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
Murphy Glenn E.J.
Ogden Necholus
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