Colloid systems and wetting agents; subcombinations thereof; pro – Continuous liquid or supercritical phase: colloid systems;... – Aqueous continuous liquid phase and discontinuous phase...
Patent
1998-04-16
2000-11-14
Lovering, Richard D.
Colloid systems and wetting agents; subcombinations thereof; pro
Continuous liquid or supercritical phase: colloid systems;...
Aqueous continuous liquid phase and discontinuous phase...
516 77, 516900, 510416, 510126, 510159, 510502, 424 7019, 424 7031, B01F 308, B01F 312, B01F 1700, C11D 1825
Patent
active
061471240
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a pearlescer concentrate in the form of a free-flowing or pumpable aqueous dispersion containing 5 to 50% by weight of pearlescing components.
2. Discussion of the Related Art
Aqueous formulations of surfactants and cosmetic preparations can be given an aesthetically attractive pearlescent appearance by incorporation of substances which, after cooling, precipitate in the form of fine pearlescent crystals and remain dispersed in the formulations. Suitable pearlescers are, for example, the monoesters, diesters and optionally triesters of ethylene glycol, propylene glycol and oligomeric alkylene glycols of this type or glycerol with C.sub.14-22 fatty acids, fatty acids and monoalkanolamides of fatty acids.
It is also known that the pearlescers mentioned above can be stably dispersed in water or in aqueous surfactant solutions and that the concentrated pearlescer dispersions obtained in this way can be added without heating to the formulations to be given a pearlescent appearance so that there is no need for the heating and cooling otherwise necessary for incorporation to form the pearlescent crystals.
Although a relatively wide range of largely satisfactory pearlescer concentrates is available today, attempts are still being made to develop concentrates which are distinguished by particularly brilliant pearlescence.
Attempts are also being made to develop pearlescer concentrates with excellent properties where the emulsifier base is made up completely or predominantly of nonionic surfactants. Pearlescer concentrates such as these may generally be used without any regard for the types of emulsifier in the end product. Efforts are also being made to formulate pearlescer concentrates with a surfactant base which is distinguished by ready biodegradability.
It has now been found that pearlescer concentrates based on fatty acid-N-alkyl polyhydroxyalkylamide emulsifiers satisfy these requirements particularly well.
SUMMARY OF THE INVENTION
Accordingly, the present invention relates to pearlescer concentrates in the form of a free-flowing aqueous dispersion containing 5 to 50% by weight of pearlescing components and 5 to 55% by weight of emulsifiers, characterized in that they contain fatty acid-N-alkyl polyhydroxyalkylamides corresponding to general formula (I): ##STR2## in which R.sup.1 --CO is an aliphatic acyl group containing 6 to 22 carbon atoms, R.sup.2 is hydrogen, an alkyl or hydroxyalkyl group containing 1 to 4 carbon atoms and R.sup.z is a linear or branched polyhydroxyalkyl radical containing 3 to 12 carbon atoms and 3 to 10 hydroxyl groups, as emulsifiers.
DESCRIPTION OF THE INVENTION
In the context of the invention, pearlescing components are understood to be meltable fats or waxes which, on cooling of aqueous solutions or emulsions thereof, crystallize out at temperatures of about 30 to 90.degree. C. in the form of fine pearlescent crystals.
These meltable fats or waxes include atoms, R.sup.4 is hydrogen or has the same meaning as R.sup.3, n is the number 2 or 3 and x is a number of 1 to 4, more particularly, 8 to 18 carbon atoms and X is a --CH.sub.2 --CH.sub.2 --OH group, a --CH.sub.2 --CH.sub.2 --CH.sub.2 --OH group or a --C(CH.sub.3).sub.2 --OH group, acids containing 14 to 22 carbon atoms.
Examples of esters corresponding to the general formula R.sup.3 (OC.sub.n H.sub.2n).sub.x OR.sup.4 are the monoesters and diesters of ethylene glycol and propylene glycol with higher fatty acids, for example with palmitic acid, stearic acid or behenic acid, or the diesters of diethylene glycol or triethylene glycol with such fatty acids. Also suitable are mixtures of monoesters and diesters of the glycols mentioned with fatty acid mixtures, for example with hydrogenated tallow fatty acid, palm oil fatty acid or with the saturated C.sub.14-18 fatty acid fraction of tallow fatty acid. The ethylene glycol monoesters and/or diesters of palmitic and/or stearic acid are particularly suitable.
Preferred monoalkanolamides are the mono
REFERENCES:
patent: 5500155 (1996-03-01), Weuthen et al.
patent: 5545354 (1996-08-01), Ofosu-Asante
patent: 5711899 (1998-01-01), Kawa et al.
patent: 5789372 (1998-08-01), Fabry
Bailey's Industrial Oil and Fat Products 1:646-49 (4th ed. 1979) month unavilable.
Ansmann Achim
Gondek Helga
Kawa Rolf
Drach John E.
Henkel Kommanditgesellschaft auf Aktien
J. Murphy Glenn E.
Lovering Richard D.
Metzmaier Daniel S.
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