Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1996-03-15
1998-01-27
Lieberman, Paul
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510152, 510155, 510156, C11D 168, C11D 174, C11D 322
Patent
active
057122350
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to bar soaps containing alkyl and/or alkenyl oligoglycosides and/or fatty acid N-alkyl polyhydroxyalkylamides, soaps and optionally selected anionic surfactants.
2. Statement of Related Art
Modern bar soaps, more particularly toilet soaps, are normally based on mixtures of beef tallow and coconut oil in a ratio of approximately 9:1. This fatty mixture is hydrolyzed by addition of sodium hydroxide to the base soap to which other additives, including for example humectants, fillers and binders, superfatting agents, dyes and perfumes, etc., are added. Toilet soaps normally contain approximately 80% of fatty acid salts, 10% of water and ad 100% auxiliaries and additives. The large number of products offered to the consumer reflect the vigorous market interest and, at the same time, make it clear that there is a constant demand among consumers for further improved products distinguished in particular by improved dermatological compatibility, greater foaming power, greater creaminess, refatting, removability by rinsing, feeling on the skin and the like. By contrast, soap manufacturers are looking for soap formulations which, for example, lead to bars of greater breaking strength or which enable certain surfactants, for example alkyl sulfates, to be readily incorporated. An overview on this subject can be found, for example, in J. Am. Oil. Chem. Soc. 59, 442 (1982).
So far as the production of bar soaps is concerned, it is readily possible to look back over a very large number of known processes. A clear distinction has to be made in this regard between synthetic "soap-free" soaps, so-called syndets, and in particular combinations of fatty acid salts and synthetic surfactants ("combination bars"). According to EP-A-0 176 330 (Unilever), for example, combination bars are produced by combining fatty acid soaps with salts of isethionic acid. The use of fatty acid isethionates as a synthetic ingredient of combination bars is known from EP-A 0 189 332, EP-A 0 472 320 and EP-A 0 508 006 (Unilever).
Recently, increasing interest has also been shown in alkyl glucosides as a class of nonionic mild surfactants for the production of toilet soaps. For example, it is proposed in a technical bulletin published by Rohm & Haas on "Triton CG-110" to add this C.sub.8-10 alkyl oligoglucoside to a base soap in quantities of 2% by weight. It is known from DE-AS 593 422 (Th. Boehme) that the addition of 10 to 15% by weight of acetyl maltoside to a base soap mixture produces an improvement in washing power.
U.S. Pat. Nos. 4,536,318 and 4,599,188 (Procter & Gamble) describe foaming mixtures of alkyl glucosides and soaps which are described as being basically suitable for the production of bar soaps. In addition, toilet soaps containing cationic polymers in addition to soaps and alkyl glucosides are known from European patent applications EP-A 0 227 321, EP-A 0 308 189 and EP-A 308 190 (Procter & Gamble).
According to the teaching of U.S. Pat. No. 5,043,091 (Colgate), the addition of alkyl glucosides to soaps containing alkyl benzenesulfonates and alkyl sulfates can improve their mechanical properties at the production stage. Finally, European patent application EP-A 0 463 912 (Colgate) describes toilet soaps containing 45 to 95% by weight of C.sub.8-24 fatty acid soaps, 1 to 20% by weight of alkyl glucosides, humectants and optionally anionic surfactants and/or fatty acids.
Despite the extensive prior art, the known solutions are still not entirely satisfactory. For example, it is not possible in most cases to dispense with the use of fatty alcohols as plasticizers because otherwise moldability would be unsatisfactory. Some fatty alcohol sulfates and other anionic surfactants are difficult to incorporate in some formulations while formulations containing alkyl glucosides are not sufficiently solid and show a tendency to deliquesce. Several of the products on the market are also not entirely satisfactory in regard to their compatibility, particularly with sensi
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Fabry Bernd
Nieendick Claus
Richter Bernd
Schmid Karl-Heinz
Syldath Andreas
Drach John E.
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
Lieberman Paul
Millson Jr. Henry E.
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