Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1996-06-05
1998-05-12
McGinty, Douglas J.
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510360, 510504, 510506, 510423, C11D 1835
Patent
active
057504865
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to low-foaming cleaning formulations based on cationic surfactants which contain mixtures of linear and branched alcohol ethoxylates as self-thickening nonionic surfactant components.
2. Discussion of Related Art
Formulations for cleaning hard non-textile surfaces occurring in the home and in the institutional sector, except for crockery, are generally known as multipurpose cleaners (MPC's). Low-foaming MPC's are those which, when manually applied, generate a minimal volume of foam which undergoes a significant further reduction within a few minutes.
Formulations of the type in question have long been known and are established on the market. They are essentially aqueous surfactant solutions of various kinds with or without additions of builders, hydrotropes or solvents. Besides the required cleaning effect, a disinfecting effect is often required so that formulations of the type in question normally contain cationic surfactants, especially those containing two long and two short alkyl chains, as active substances.
Although some foaming of the in-use solution is required by the user at the beginning of cleaning as a sign of effectiveness, the foam should soon collapse so that surfaces once cleaned do not have to be rewiped. To this end, formulations of the type mentioned normally contain low-foaming nonionic surfactants, for example mixed ethers or alcohol alkoxylates, more particularly oxoalcohol ethoxylates.
Unfortunately, multipurpose cleaners based on cationic surfactants and alcohol ethoxylates are difficult to thicken. Considerable quantities of carboxymethyl cellulose, fatty acid alkanolamides and/or electrolyte salts normally have to be added to control viscosity although viscosity regulators such as these can adversely affect the property profile of the formulation. In addition, stability in storage is not always satisfactory, especially in the event of variations in temperature.
Accordingly, the problem addressed by the present invention was to provide low-foaming cleaning formulations based on cationic surfactants which would be free from the disadvantages mentioned above.
DESCRIPTION OF THE INVENTION
The present invention relates to low-foaming cleaning formulations based on cationic surfactants which are characterized in that they contain mixtures of 18 carbon atoms and m is a number of 1 to 10 and to 15 carbon atoms and n is a number of 1 to 10,
It has surprisingly been found that the formulations according to the invention are not only low-foaming and have an excellent cleaning and disinfecting effect, they also show sufficiently high viscosity, even in the absence of typical thickeners, through the addition of the selected nonionic surfactant mixture and retain this viscosity, even in the event of prolonged storage.
The cationic compounds typically used are so-called quaternary ammonium compounds, i.e. derivatives of the ammonium ion preferably containing two long and two short alkyl chains, such as dimethyl distearylammonium chloride for example. Quaternary benzylammonium compounds corresponding to formula (III): ##STR1## in which R.sup.3 and R.sup.4 independently of one another represent an optionally hydroxy-substituted alkyl radical containing 1 to 4 carbon atoms, R.sup.5 is an alkyl and/or alkenyl radical containing 12 to 22 carbon atoms, Ph is a phenyl radical and X is halide, are preferably used. Typical examples of such compounds are dimethyl dodecyl benzylammonium chloride and bromide. The multipurpose cleaners according to the invention may contain the cationic surfactants in quantities of 1 to 5% by weight and preferably 2 to 3% by weight, based on the formulation.
According to the invention, the nonionic surfactants are used as a self-thickening mixture of strictly linear fatty alcohol EO adducts and more or less highly branched oxoalcohol EO adducts. Both types of ethoxylate are known substances which are industrially produced by the base-catalyzed ethoxylation of primary alcohols. The ethoxylates m
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Ibanez Pilar
Josa Jaume
Osset Miguel
Grandmaison Real J.
Hardee John R.
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
McGinty Douglas J.
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