Use of an organofluorine hydrocarbon compound as a binder for co

Details Use of an organofluorine hydrocarbon compound as a binder for co Use of an organofluorine hydrocarbon compound as a binder for co

1995-01-26

1997-12-30

Gardner-Lane, Sally

Drug, bio-affecting and body treating compositions

Live skin colorant containing

424 64, 424 69, 514937, A61K 7021, A61K 7031

Patent

active

057026890

DESCRIPTION:

BRIEF SUMMARY
This application is a 371 of PCT/FR94/00616 filed May 25, 1994.
The present invention concerns the use of organofluorine hydrocarbon compounds as a binder in the preparation of cosmetic powder compositions, also a cosmetic composition in the form of an anhydrous powder comprising such compounds.
In the field of cosmetic powder compositions in the form of compressed or loose powders for face make-up or dusting powder, it is known to use a particulate phase comprising mainly pigments and fillers and a greasy phase comprising binders such as fatty substances to provide the finished product with a particular density, to bind the mineral and/or organic filler particles, to provide the make-up with smoothness and softness and to encourage adherence to the skin.
In order to provide suitable binding properties, a mixture of mineral and plant oils combined with fatty esters and/or fatty alcohols can be used. These mineral and plant oils can, however, produce cosmetic products which are not sufficiently smooth.
To overcome the problem of lack of smoothness, silicone oils or mixtures of silicone resins, waxes, oils or gums can be used. The use of silicone based products is, however, limited because of their incompatibility with some other oils and in particular, their insolubility in certain other oils.
Finally, certain perfluorinated oils, in particular perfluoropolyethers, are well known for providing smoothness to cosmetic compositions, but their use is limited due to their insolubility in the usual hydrocarbon oils (animal, vegetable or mineral) or in silicone oils. This insolubility results in instability in the cosmetic composition.
Of the known perfluoropolyethers, compounds of the type "FOMBLIN", in particular "FOMBLIN HC25", sold by MONTEDISON have the additional problem of poor pigment development: the shade produced by the pigment is relatively less intense, since FOMBLIN produces a white effect.
Thus, to obtain the desired shade with respect to a reference using a FOMBLIN compound, the pigment concentration must be increased by 25% or even 60%; apart from the additional costs involved, this reduces the concentration of mineral and/or organic fillers in the particulate phase, and the cosmetic formulation is more difficult to use; further, the color range is limited.
We have now developed cosmetic powder compositions in which the binder comprises an organofluorine hydrocarbon compound.
These cosmetic powder compositions both bind well and have excellent cosmetic properties: organofluorine hydrocarbon oils are good lubricants, are very smooth, spread well, provide the surface of compressed powders with a smooth and homogeneous appearance, and are adequately, even completely compatible with hydrocarbon oils or silicone oils. They also provide good pigment development.
For organofluorine hydrocarbon compounds, the substitution ratio for substitution of hydrogen atoms by fluorine atoms is defined by the ratio: number of fluorine atoms/(number of fluorine atoms+number of hydrogen atoms), where only the hydrogen atoms which are bonded to carbon atoms of the backbone are taken into account.
The present invention thus concerns the use of organofluorine hydrocarbon compounds as a binder for cosmetic powder compositions; the organofluorine hydrocarbon compounds have a substitution ratio for hydrogen atoms bonded to carbon atoms by fluorine atoms of between 0.5% and 95%, preferably 10% to 80%.
In accordance with the invention, the compounds can be used in proportions of between 0.1% and 35% by weight with respect to the weight of the cosmetic powder composition.
Organofluorine hydrocarbon compounds of the invention have formula (I): is 2 or 3,
R.sub.F represents an aliphatic or aromatic, saturated or unsaturated, linear, branched or cyclic fluorinated radical, in which the chain may be functionalized and/or interrupted by a divalent atom such as oxygen or sulfur, or a trivalent atom such as nitrogen and/or substituted by hydrogen atoms or other halogen atoms, provided that, for any two carbon atoms of the backbone, no

REFERENCES:
patent: 3632744 (1972-01-01), Paulsen

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