Compositions – Water-softening or purifying or scale-inhibiting agents – Water-insoluble base-exchange agent containing
Patent
1993-07-29
1996-01-16
Shaver, Paul F.
Compositions
Water-softening or purifying or scale-inhibiting agents
Water-insoluble base-exchange agent containing
C11D 322
Patent
active
054845483
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to scouring powders which, at the same time, have a good cleaning effect with respect in particular to greasy soil and generate very little foam in use.
2. Statement of Related Art
Scouring powders are among the oldest and, even today, still indispensable cleaning materials which are used both in the home and institutionally for removing obstinate soils. The basic constituents of scouring powders are, on the one hand, the abrasive particles required for mechanically loosening obstinate soil and, on the other hand, surfactants as surface-active agents which are essential for the removal of greasy or fat-containing dirt. The scouring powders currently available on the market almost exclusively contain alkylbenzene sulfonates as surfactants and, from case to case, other active substances and auxiliaries such as, for example, bleaches and disinfectants, zeolites and alkaline salts. German patent applications DE 25 39 733 A1 and DE 27 39 776 A1 (Procter & Gamble) describe scouring liquids and powders in which the abrasive consists of perlite in a quantity of up to 65%. These documents refer mainly to this special abrasive and mention alkyl sulfates and alkylbenzene sulfonates as surfactants for the powders.
Canadian patent 1,048,365 (Procter & Gamble) describes abrasive powders having a high surfactant content of 20 to 35% and an abrasive content of 5 to 20% which are recommended both as scouring powders and as dishwashing detergents. Alkyl sulfates, alkylbenzene sulfonates and fatty alcohol ethoxylates are mentioned as surfactants. A common feature of the scouring powders known from the literature and available on the market is that they have a good cleaning effect with respect to greasy and fat-containing soil, but foam to an undesirably high degree in use. To avoid foaming, attempts have even been made to market pure abrasives without any addition whatever of surfactants. However, scouring powders such as these do not remove grease and, in addition, behave totally unsatisfactorily in use because they cannot be dispersed. Hitherto, it has not been possible to satisfy consumer demand for low-foaming scouring powders with a good cleaning effect.
DESCRIPTION OF THE INVENTION
Accordingly, the problem addressed by the present invention was to provide scouring powders of the desired type which would combine both product effects, namely good soil removal and low foaming.
Surprisingly, this problem has been solved by addition to the scouring powders of alkyl glycosides having a degree of oligomerization of 1.2 to 1.4 or surfactant combinations containing these alkyl glycosides. The scouring powders may additionally contain typical ingredients.
Accordingly, the present invention relates to low-foam scouring powders containing abrasives, other typical ingredients and, optionally, other surfactants, characterized in that they contain an addition of alkyl glycosides having a degree of oligomerization of 1.2 to 1.4.
Alkyl glycosides are known as degradable surfactants of native origin. In general, the alkyl glycosides used as surfactants in accordance with the present invention may be represented by the structural formula RO(G).sub.x, where R is an aliphatic radical containing at least 4 carbon atoms, preferably the residue of a primary alcohol and, more preferably, a fatty alkyl or fatty alkenyl radical containing 8 to 22 and preferably 12 to 18 carbon atoms. The symbol (G) in the formula stands for a glycose unit, glucose being preferred by virtue of its ready availability on the one hand and its high reactivity on the other hand. Finally, the index x is a number of 1.2 to 1.4 which indicates the so-called degree of oligomerization, i.e. the distribution of monoglycosides and oligoglycosides. In the representation of the alkyl glycosides by the formula RO(G).sub.x, the fatty alcohol component is disregarded. In principle, this fatty alcohol component may largely be controlled by careful distillation of the alkyl glycoside, i.e. the fatty al
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Kiewert Eva
Pioch Lothar
Seiter Wolfgang
Wichelhaus Winfried
Henkel Kommanditgesellschft auf Aktien
Jaeschke Wayne C.
Millson Jr. Henry E.
Shaver Paul F.
Szoke Ernest G.
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