Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
1999-02-04
2002-08-13
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S078080, C514S785000, C514S786000, C252S175000, C252S391000, C252S391000
Reexamination Certificate
active
06432419
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to the use of selected fatty compounds as a substitute for silicones in the production of cosmetic and/or pharmaceutical preparations.
2. Discussion of Related Art
Silicones are used in skin and hair cosmetics as additives for influencing feel and luster. Unfortunately, the so-called build-up effect of silicones is a disadvantage. By this is meant that, when silicone-containing products are repeatedly applied to the skin or to the hair, a layer of polymers builds up and is difficult to remove simply by washing. In the case of hair in particular, this layer of polymers is undesirable and can interfere with other treatments, for example waving or dyeing. An overview of the use of silicones in cosmetics was published, for example, by K. Schnurrbusch in
Seifen
-
Fette
-
Öle
-
Wachse
100, 173, (1974).
Accordingly, the problem addressed by the present invention was to provide silicone substitutes which would not build up in use, but which would still show at least comparable performance properties in regard to feel and luster.
2. Description of the Invention
The present invention relates to the use of fatty compounds as a silicone substitute in the production of cosmetic and/or pharmaceutical preparations which is distinguished by the fact that oils selected from the group consisting of
(a) dialkyl ethers,
(b) dialkyl cyclohexanes,
(c) Guerbet alcohols,
(d) Guerbet carbonates,
(e) ester oils,
(f) polyol polyhydroxystearates and/or
(g) hydroxycarboxylic acid esters
are used.
It has surprisingly been found that the sensorial evaluation of the selected oils in regard to feel and luster is at least as good as that of silicones without any unwanted build-up effect on skin and hair.
Dialkyl ethers
Dialkyl ethers which form component (a) correspond to formula (I):
R
1
—O—R
2
(I)
in which R
1
and R
2
independently of one another represent a linear or branched alkyl and/or alkenyl radical containing 6 to 22, preferably 8 to 18 and more preferably 12 to 18 carbon atoms. The ethers may have an asymmetrical structure, although they preferably have a symmetrical structure. Typical examples are di-n-octyl ether, di-i-octyl ether and di-n-stearyl ether.
Dialkyl cyclohexanes
Dialkyl cyclohexanes which form component (b) correspond to formula (II):
R
3
—[C]—R
4
(II)
in which R
3
and R
4
independently of one another represent a linear or branched alkyl and/or alkenyl group containing 6 to 22, preferably 8 to 18 and more preferably 12 to 18 carbon atoms and C is a cyclohexyl group. Typical examples are di-n-octyl cyclohexane, di-i-octyl cyclohexane and di-n-stearyl cyclohexane.
Guerbet alcohols
Guerbet alcohols which form component (c) are preferably obtained by base-catalyzed self-condensation of linear and/or branched alcohols containing 6 to 22 and preferably 8 to 18 carbon atoms. An overview of Guerbet alcohols was published by A. J. O'Lennick in
Soap Cosm. Chem. Spec. (April)
52 (1987). Typical examples are condensation products of technical fatty alcohol cuts containing 8 to 10 or 16 to 18 carbon atoms.
Guerbet carbonates
Guerbet carbonates which form component (d) are normally obtained by complete or partial transesterification of dialkyl carbonates with linear and/or branched alcohols containing 6 to 22, preferably 8 to 18 and more preferably 12 to 18 carbon atoms [cf. U.S. 5,387,374 (Henkel)]. Typical examples are carbonates which are obtained by transesterification of dimethyl carbonate or diethyl carbonate with fatty alcohols containing 8 to 10 or 12 to 18 carbon atoms, preferably octanol or cetearyl alcohol.
Ester oils
Ester oils which form component (e) are long-chain esters liquid at room temperature which correspond to formula (III):
R
5
CO—OR
6
(III)
where R
5
CO is an aliphatic acyl group containing 6 to 22 carbon atoms and R
6
is an alkyl and/or alkenyl group containing 12 to 22 carbon atoms. Typical examples are esters of caproic acid, caprylic acid, 2-ethylhexanoic acid, capric acid, lauric acid, isotridecanoic acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, isostearic acid, oleic acid, elaidic acid, petroselic acid, linoleic acid, linolenic acid, elaeostearic acid, arachic acid, gadoleic acid, behenic acid and erucic acid and technical mixtures thereof with lauryl alcohol, isotridecyl alcohol, myristyl alcohol, cetyl alcohol, palmitoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, linolyl alcohol, linolenyl alcohol, eleaostearyl alcohol, arachyl alcohol, gadoleyl alcohol, behenyl alcohol, erucyl alcohol and brassidyl alcohol and technical mixtures thereof. Ester oils which contain at least 24 and preferably at least 30 carbon atoms and one double bond in the fatty acid and fatty alcohol component together are preferred. Typical examples are oleyl erucate, erucyl oleate, behenyl oleate and cetearyl oleate.
Polyol polyhydroxystearates
The polyol component of the polyol polyhydroxystearates which form component (f) may be derived from substances which contain at least 2, preferably 3 to 12 and more preferably 3 to 8 hydroxyl groups and 2 to 12 carbon atoms. Typical examples are
glycerol and polyglycerol;
alkylene glycols, such as for example ethylene glycol, diethylene glycol, propylene glycol;
methylol compounds, such as in particular trimethylol ethane, trimethylol propane, trimethylol butane, pentaerythritol and dipentaerythritol;
alkyl oligoglucosides containing 1 to 22, preferably 1 to 8 and more preferably 1 to 4 carbon atoms in the alkyl group, such as for example methyl and butyl glucoside;
sugar alcohols containing 5 to 12 carbon atoms, such as for example sorbitol or mannitol,
sugars containing 5 to 12 carbon atoms, such as for example glucose or sucrose;
amino sugars, such as for example glucamine.
Among the substances which form component (f), reaction products based on polyglycerol are particularly important by virtue of their excellent performance properties. It has proved to be of particular advantage to use selected polyglycerols with the following homolog distribution (the preferred ranges are shown in brackets):
glycerol: 5 to 35 (15 to 30)% by weight
diglycerols: 15 to 40 (20 to 32)% by weight
triglycerols: 10 to 35 (15 to 25)% by weight
tetraglycerols: 5 to 20 (8 to 15)% by weight
pentaglycerols: 2 to 10 (3 to 8)% by weight
oligoglycerols: to 100% by weight
Hydrocarboxylic acid esters
The last component (g) is selected from esters of hydroxycarboxylic acids containing 3 to 18 and preferably 3 to 12 carbon atoms with aliphatic alcohols containing 1 to 22, preferably 6 to 18 and more preferably 12 to 18 carbon atoms. Typical examples are esters of lactic acid, malic acid, tartaric acid, citric acid, ricinoleic acid and/or 12-hydroxystearic acid with methanol, ethanol, caproic alcohol, caprylic alcohol, 2-ethylhexyl alcohol, capric alcohol, lauryl alcohol, isotridecyl alcohol, myristyl alcohol, cetyl alcohol, palmitoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, linolyl alcohol, linolenyl alcohol, elaeostearyl alcohol, arachyl alcohol, gadoleyl alcohol, behenyl alcohol, erucyl alcohol and brassidyl alcohol and technical mixtures thereof. It is preferred to use long-chain hydroxycarboxylic acids, such as ricinoleic acid and hydroxystearic acid, with short-chain alcohols, for example methanol or ethanol, or short-chain hydroxycarboxylic acids, such as lactic acid or citric acid, with long-chain fatty alcohols, such as for example cocofatty alcohol or cetearyl alcohol.
Surfactants
In one preferred embodiment of the invention, the sensorial properties of the fatty compounds can be further improved by mixing with nonionic surfactants, preferably of the alkyl and/or alkenyl oligoglycoside and/or fatty acid-N-alkyl glucamide type. In this embodiment, the fatty compounds and the nonionic surfactants may be used in a ratio by weight of 10:90 to 90:10, preferably in a ratio by weight of 25:75 to 7
Ansmann Achim
Fabry Bernd
Kahre Joerg
Kawa Rolf
Seipel Werner
Channevajjala Lakshmi
Cognis Deutschland GmbH
Drach John E.
Millson, Jr. Henry E.
Page Thurman K.
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