Cleaning and liquid contact with solids – Processes – For metallic – siliceous – or calcareous basework – including...
Patent
1993-06-09
1995-07-04
Simmons, David A.
Cleaning and liquid contact with solids
Processes
For metallic, siliceous, or calcareous basework, including...
134 21, 134 41, 252162, 252171, 25217423, 25217424, B08B 308, B08B 504, C09D 904, C11D 750
Patent
active
054296846
DESCRIPTION:
BRIEF SUMMARY
BARCKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a low-foaming carpet cleaning composition and to a process for cleaning large-area textile surfaces using this composition.
2. Discussion of the Related Art
Loose and fitted carpets are often cleaned in place using powder-form products which are scattered onto the carpets and removed again under suction after a mechanical treatment. More intensive cleaning is carried out with water-based cleaning solutions which are applied to the carpets and subsequently removed together with the soil after a certain contact time, optionally accompanied by a mechanical treatment. In this case, a distinction is drawn between so-called shampooing, in which a cleaning solution is first sprayed onto the carpets and worked into the carpets using brushes or similar mechanical aids before the carpets are subsequently freed by suction from the cleaning solution or rather the foam formed by the mechanical treatment, and the liquid extraction process in which the cleaning solution is sprayed onto the carpet through a pressure nozzle and, immediately afterwards, is removed from the carpet by a suction nozzle a few centimeters behind the lip of the pressure nozzle. In the institutional sector, large-area textile surfaces, particularly floor coverings or upholstery materials, are cleaned by this process using spray extraction cleaners of the type described, for example, in Swiss patent CH 646 044. Cleaners of the type in question, which have also recently been marketed for carpet cleaning in the home, consist essentially of a storage container holding a generally aqueous surfactant solution which is sprayed onto the textile surface to be cleaned through a nozzle via a hose and which penetrates more or less deeply into the material to be cleaned. The cleaning effect can be enhanced by a brush arranged at the end of the hose near the nozzle. In the working direction, the nozzle is followed by a suction unit which transports the used cleaning solution into a dirty water container. To ensure that the dirty water taken in does not overflow, the dirty water container is provided with a float contact which, when the container is full, switches off the pumps used to spray the cleaning solution and to take in the dirty water so that the dirty water container can be emptied. In any cleaning process of this type, the freedom from foam of the surfactants present in the cleaning compositions to be used has to meet stringent requirements because the cleaning solutions are sprayed onto the surfaces to be cleaned through relatively narrow nozzles and are removed by suction almost immediately afterwards. Any foam formed also enters the dirty water container and, through its volume, prevents the holding capacity of the dirty water container from being optimally utilized.
To avoid this problem, the automatic measured addition of defoamers to the used cleaning solution before it enters the dirty water container was proposed, for example, in W. Lutz, Lexikon fur Reinigungs- und Hygienetechnik, 3rd Edition, 1985, page 471. This necessitates on the one hand modification of the standard spray extraction cleaner through the incorporation of a defoamer injector and, on the other hand, the use of an additional preparation which makes no contribution to the actual cleaning step.
Accordingly, the problem addressed by the present invention was to provide a low-foaming cleaning composition for carpets which would be particularly suitable for use in spray extraction cleaners.
DESCRIPTION OF THE INVENTION
This problem has been solved by the use of sulfonated oleic acid in the form of an alkali metal or ammonium salt, more particularly in the form of the disodium salt, as surfactant component in carpet cleaning compositions. Accordingly, the invention also relates to carpet cleaning compositions which contain the salts mentioned in conjunction with other cleaning-active substances.
The carpet cleaning compositions according to the invention are essentially water-based concentrates whi
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Behler Ansgar
Osberghaus Rainer
Rogmann Karl-Heinz
Tuchermann Herta
Chaudhry Saeed
Grandmaison Real J.
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
Simmons David A.
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