Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1999-05-20
2000-12-26
Hardee, John R.
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510443, 510498, C11D 137
Patent
active
061659614
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to water-free surfactant mixtures with a reduced potential for irritation containing selected fatty alcohol sulfates and alkyl benzenesulfonates in selected mixing ratios and to their use for the production of surface-active compositions.
2. Discussion of Related Art
By virtue of their favorable applicational properties and their excellent ecological compatibility, fatty alcohol sulfates represent anionic surfactants which are acquiring increasing significance for the production of laundry detergents, dishwashing detergents and cleaning compositions.
Highly concentrated, aqueous or water-free solid formulations of anionic surfactants are of course desirable for storage and transportation purposes. Unfortunately, such formulations are attended by the disadvantage that, in contrast to the products diluted to the in-use concentration, they have a highly irritating effect on the skin and mucous membrane which means that more stringent safety-in-use requirements have to be satisfied for marketing. Another disadvantage is that known compositions do not possess sufficient flowability or solubility, especially in cold water.
DE-C2 2857292 describes detergent compositions containing alkyl sulfates and alkyl benzenesulfonates in which selected polymers are present as soil repellents. According to International patent application WO 95/02036 (Unilever), free-flowing surfactant granules are obtained by mixing 33 to 55% by weight of a liquid acidic anionic surfactant mixture (for example alkyl benzenesulfonic acid or alkyl sulfuric acid semiester) with 20 to 50% by weight of zeolite and 2 to 25% by weight of alkali metal carbonate.
Accordingly, the complex problem addressed by the present invention was to provide new water-free surfactant mixtures which would be distinguished by a significantly reduced potential for irritation, improved flow behavior and improved solubility.
DESCRIPTION OF THE INVENTION
The present invention relates to water-free surfactant mixtures containing atoms and X is an alkali metal and/or alkaline earth metal, ammonium, alkyl ammonium, alkanolammonium or glucammonium, and a phenyl group and X is again an alkali metal and/or alkaline earth metal, ammonium, alkyl ammonium, alkanolammonium or glucammonium, preferably, 75:25 to 80:20.
It has surprisingly been found that the compositions according to the invention combine a synergistic reduction in their irritation potential with very favorable applicational properties, more especially improved flow behavior and solubility in cold water.
Fatty alcohol sulfates which form component (a) are known anionic surfactants and are normally obtained by reacting fatty alcohols with sulfating agents, such as sulfuric acid, oleum, chlorosulfonic acid and, in particular, gaseous sulfur trioxide. The resulting sulfuric acid semiesters are then neutralized with suitable bases. In the context of the invention, fatty alcohol sulfates corresponding to formula (I) are sulfation products of fatty alcohols containing 16 to 18 carbon atoms. Typical examples are the sulfates of cetyl alcohol and stearyl alcohol. Technical fatty alcohol cuts, for example tallow alcohol, which may contain small amounts of even shorter or longer chain homologs are preferably used. Technical fatty alcohol cuts may also be mixed in such a way that an alcohol mixture in which the C chain distribution is mainly between 16 and 18 carbon atoms is obtained. This is of advantage, for example, when the percentage content of vegetable alcohols in the mixture is intended to be as high as possible.
Alkyl benzenesulfonates which form component (b) are also known anionic surfactants which are normally prepared by nuclear sulfonation of linear alkyl benzenes and suitable neutralization of the resulting products. Typical examples are sulfonation products of decyl benzene, dodecyl benzene and tetradecyl benzene and technical mixtures thereof which are used in the form of their sodium or potassium salts.
The mixing of the compone
REFERENCES:
patent: 3703772 (1972-11-01), McHugh et al.
patent: 3870649 (1975-03-01), Langstroth
patent: 4715979 (1987-12-01), Moore et al.
patent: 5066425 (1991-11-01), Ofosu-Asante et al.
Kischkel Ditmar
Krohnen Thomas
Schmid Karl-Heinz
Syldath Andreas
Drach John E.
Hardee John R.
Henkel Kommanditgesellschaft auf Aktien
Millson Jr. Henry E.
Roland Thomas F.
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