Compositions – Water-softening or purifying or scale-inhibiting agents
Patent
1993-11-29
1996-06-04
Rollins-Cross, E.
Compositions
Water-softening or purifying or scale-inhibiting agents
25217418, 252173, 252549, 252550, 252554, 252558, 252DIG14, C11D 112, C11D 1755
Patent
active
055230164
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to concentrated surfactant preparations of alkyl glycosides and alkyl sulfates in the form of stable, flowable and pumpable liquids and to their use as compounds for the production of liquid detergents.
2. Statement of Related Art
It has long been known that alkyl glycosides containing long-chain alkyl groups belong to the non-ionic surfactants. The expert also knows, as described for example in A. M. Schwartz, J. W. Perry, Surface Active Agents, Vol. I, Interscience Publishers, 1949, page 372, that surfactant mixtures generally have synergistic effects and often show better cleaning properties than would be obtained from the sum of the values of the individual components.
Detergents containing alkyl glycosides in combination with at least one typical anionic surfactant in a ratio of 1:10 to 10:1 are described in European patent application EP 070 074. Detergents containing alkyl glycosides and anionic surfactants are also known from European patent application EP 092 877. In addition, liquid detergents containing alkyl glycosides, certain other nonionic surfactants and anionic surfactants are known from European patent application EP 105 556. Liquid detergents containing alkyl glycosides and typical anionic surfactants are known from International patent application WO 86/02943. European patent application EP 132 043 describes a process for the production of alkyl glycosides using catalytic quantities of anionic surfactant in its acid form. According to European patent application EP 132 046, a production process such as this is modified by addition of certain bases after the actual reaction to neutralize the catalyst.
It is not apparent from any of the documents cited above that the properties of water-containing alkyl glycoside preparations, more particularly their flowability and also their cleaning performance, can be drastically improved by the addition of very small quantities of certain anionic surfactants.
In the production of liquid detergents, the individual components are generally used in the form of free-flowing solutions. The components intended for mixing to form the final detergent should have a high active substance content and, at the same time, should be easy to handle, in other words they should be free-flowing and easy to pump and should show high stability in storage. Alkyl glycosides normally accumulate in the form of highly viscous pastes.
DESCRIPTION OF THE INVENTION
Accordingly, the problem addressed by the present invention was to provide a storable, liquid, flowable and pumpable alkyl glycoside preparation which, by virtue of its favorable handling properties, could be used in the production of detergents and which would contain small quantities of non-alkyl-glycosidic active substance.
This problem has been solved by a water-containing mixture of certain quantities of alkyl glycoside and a certain anionic surfactant.
The alkyl glycoside preparations according to the invention are water-containing mixtures consisting essentially of 20% by weight to 60% by weight of an alkyl glycoside corresponding to formula I: is a number of 1 to 10, 0.1% by weight to 3% by weight of an anionic surfactant of the sulfate or sulfonate type selected from the group consisting of alkyl sulfates, ether sulfates, alkane sulfonates, .alpha.-sulfofatty acids, carboxylic acid esters thereof, sulfonation products of alkyl benzenes, alkenes or unsaturated fatty acids and mixtures thereof, the ratio by weight of alkyl glycoside (I) to sulfate and/or sulfonate being 200:1 to 20:1, and 37% by weight to 79.9% by weight water.
The alkyl glycoside preparations according to the invention preferably contain 40% by weight to 70% by weight water and, more preferably, 45 to 65% by weight water, 30% by weight to 60% by weight alkyl glycoside (I) and, more preferably, 35% by weight to 55% by weight alkyl glycoside (I); and 0.2% by weight to 2% by weight and, more preferably, 0.5% by weight to 1% by weight sulfate and/or sulfonate. The rat
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A. M. Schwartz, J. W. Perry, Surface Active Agents, vol. 1 Interscience Publishers 1949, p. 372 (month not available).
Fette, Seifen, Anstrichmittel, 74 (1972), 163 (Jan?).
Giesen Brigitte
Schmid Karl-Heinz
Syldath Andreas
Drach John E.
Hailey Patricia L.
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
Millson Jr. Henry E.
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