FR2721824A1 - Use of fluorinated resins in cosmetic compsns. - Google Patents

Abstract

Fluorinated resins are used in cosmetic compsns. to protect the skin, the mucous membranes and/or the hair from external attack, by forming a protective barrier. Also claimed is a cosmetic or dermatological compsn..

Description

Application of fluorinated resins in cosmetology, as well as composition

  cosmetic or dermatological containing a fluorinated resin "The subject of the present invention is the application of fluorinated resins in cosmetology as well

  that cosmetic or dermatological compositions contain

mant such resins.

  Specialists know that to be appreciated

  cited by consumers, cosmetic or dermatological compositions for topical use intended for treatment

  of the skin of the mucous membranes or the integuments must be faci-

  and pleasant to apply and, at the same time, allow

  to guarantee that the treated areas are soft and pleasant

hurt to the touch.

  To meet these requirements, it has already been proposed to incorporate silicones in compositions

  intended for the cosmetic or dermatolo-

  gie, either as a main active constituent, or as an additive cooperating with one or more principles

other assets.

  Such compositions have effectively improved the qualities of softness and flexibility of the

  skin after application, and give it a pleasant feel

  ble or to improve the qualities of softness and

  hair flexibility thanks to a sheathing effect.

  However, such compositions have not been found to be consistently satisfactory in use, given the risks of intolerance (contact dermatitis irritation) to silicones which have been observed in the case of skin application.

  To avoid these risks of intolerance, the specialists

  scientists are currently trying to develop new substances that may present an alternative to

  silicones in the field of cosmetology or the last

matology.

  However, we realized, in accordance with

  the invention, that it was possible to prepare compounds

  tions for topical use intended for the treatment of the skin,

  mucous membranes or skin appendages with advantages

  substantially similar to those obtained through the implementation

  silicone work by replacing the latter with

  fluorine sines in the form of spherical particles

  risk of very small particle size.

  It is, in fact, well known that, unlike silicones, such resins are perfectly inert

  both chemically and biologically

  that and cannot create intolerance problems when in contact with fluids and

  tissues of the human body. As an example, polyté-

  trafluorethylene is registered with the French Pharmacopoeia

  (10th edition) as a product that can be used

  used for the manufacture of catheters for infusion and has already been the subject of numerous biomedical applications (bone prostheses, cardiovascular field, etc.), while having always made it possible to meet the requirements specific to this particular field. In addition, it has already been

  proposed to inject polytetrafluoroethylene by sub-route

to fill in wrinkles.

  The present invention therefore has for

  subject application of fluorinated resins in cosmetology.

  This application is essentially character-

  laughed at in that fluorinated resins are introduced into cosmetic compositions for the skin and / or for

  mucous membranes and / or integuments (nails, hair, teeth).

  In accordance with this application, we use

  fluorinated resins to maintain or improve the qualities

  softness and suppleness of the skin and give it a pleasant touch, or to maintain or improve the softness and suppleness qualities of the hair thanks to a

gaining effect.

  According to the invention, the fluo resins

  can also be used to protect the skin

  mucous membranes and integuments vis-à-vis aggressions ex-

  by creating a protective barrier.

  In fact, this is a film-forming effect which makes it possible to isolate the skin from the ambient environment which can be

  assimilated to that obtained with ó liquid gloves ".

  Among the fluorinated resins that can be used

  used in accordance with the invention, mention may be made, at ti-

  non-limiting example, homopolymers of tetra-

  fluorethylene, chlorotrifluoroethylene and vinylidene fluoride and by binary copolymers, on the one hand, tetrafluoroethylene with hexafluoropropene, with perfluorovinyl ether and perfluoropropyl ether and with ethylene and, on the other hand, chlorotrifluorethylene with ethylene.

  The invention also relates to a compound

  cosmetic or dermatological sition for the skin and / or for the mucous membranes and / or for the integuments characterized in that it contains at least one fluorinated resin in the form of spherical particles of small particle size preferably between 3 y and 300 y incorporated into

a suitable excipient.

  Such compositions, which stand out

  by their lubricating properties susceptible

  to give the skin a pleasant touch and to have a

  sheathing effect on the hair, can of course be pre-

  smell in any dosage form without departing from the scope of the invention, such as for example: cream, milk, emulsion, gel, shampoo, powder

or mixture of powders, stick, ...

  Of course, the excipient should be chosen by-

  mi the excipients commonly used for each ga- form

  lenic. It should be noted that the fluorinated resins which

  can advantageously be chosen from the above list

  corresponding to relatively heavy products which it is essential to disperse homogeneously in

  the excipient, so as to guarantee that a

  mule having the stability essential to a cosmetic product

  or dermatological for topical use.

  According to another characteristic of the invention, the composition contains up to about 50% by weight of at least

minus a fluorinated resin.

  The proportion of fluorinated resin used

  depends, in fact, largely on the dosage form of the

  position, and can, for example, only with difficulty

  be greater than 15% in the case of a cream.

  As already indicated, in accordance with the invention, the fluorinated resins can be used as the main active ingredient, or can

  cooperate with at least one active ingredient other than that at ti-

  be an anti-inflammatory antiseptic or agent example

  catalyzing so as to improve its bioavailability (or substantivity) and consequently make it possible to reduce its concentration or the number of applications of the composition

needed in a day.

  This possibility is linked to the aforementioned film-forming effect of fluorinated resins which, by isolating the skin from the external environment, allow the active ingredient contained

  in the composition to act for longer.

  The invention also relates to a method

  cosmetological treatment characterized in that one learns

  plique, on the skin, mucous membranes or on the integuments,

  effective amount of at least one fluorinated resin.

  The aforementioned nonlimiting examples allow

  put to illustrate more precisely the characteristics

of the invention.

  Example 1: Composition in the Form of Stick% by Weight Zinc Stearate 2.84 Cetyl Alcohol 0.56 Magnesium Aluminosilicate 66.40 Polytetrafluoroethylene 30.00 Ferric Oxides 0.20 Example 2: Composition in the Form of Cream% by Weight Purified water 74.18 Glycerin 5.00 Polytetrafluoroethylene 5.00 Wheat germ oil 4.30 Polyoxyethylenated 2-mole stearyl alcohol 3.00 Polyoxyethylenated 21 mole stearyl alcohol 2.50 Caprylic & capric acid triglyceride 2.00 Acid salicylic 2.00 Mixed aluminum and sodium silicate 1.00 Cetyl alcohol 0.50 Imidazolidinylurea 0.20 Methyl parahydroxybenzoate 0.15 Propyl parahydroxybenzoate 0.10 Perfume composition 0.07 Such a cream can be obtained after Implementation of the following process: The triglyceride of caprylic and capric acids and wheat germ oil are mixed in a melter heated to 65 ° C. and the rest of the gr phase is incorporated therein. enough

by continuing the agitation.

  At the same time, 90% of the purified water and the glycerin are introduced into a tank; the temperature is brought to 65 ° C. and a mixture of these two constituents is carried out for 10 minutes by using stirring at

1000 rpm.

  The melter is then connected to the tank and an emulsion is prepared by suction of the fatty phase at 65 ° C. for 10 min before cooling it with stirring.

  until reaching a temperature of 45 C.

  When this temperature is reached, one in-

  produced in the emulsion salicylic acid, mixed aluminum and sodium silicate and the remaining 10% of water,

  with stirring, while continuing the descent in time

  temperature; when it has reached 40 C, we introduce the

  polytetrafluoroethylene and the mixture obtained is stirred during

  for 10 min. The parahydroxybenzoates and the imidazolidinylurea are then introduced while always maintaining the temperature

  at 40 C; this mixture is stirred for 10 min. We lower in-

  then the temperature at 35 C before incorporating the compound

perfuming tion.

  EXAMPLE 3 Composition in the Form of a Fluid Emulsion% by Weight Fluid Vaseline Oil 15.00 Coconut Oil 5.00 Polytetrafluoroethylene 10.00 Cetyl Alcohol 2.00 Sorbitan Monostearate 1.80 Polyoxyethylene Sorbitan Monostearate Moles 4, 20 Carbomer 0.12 Glycerin 3.00 Triethanolamine 0.12 Methyldibromoglutaronitrile and phenoxyethanol 0.10 Perfume composition 0.20 Demineralized water 58.46 Such an emulsion can be obtained following the implementation of the following process: The oil is mixed of fluid petroleum jelly and

  coconut oil in a melter heated to 65 C and we in-

  corpore with stirring the rest of the fatty phase at the

diaper thus obtained.

  At the same time, the water and the glycerin are mixed in a tank; we bring the temperature to 65 C and we

  stir this mixture for 10 min with stirring at 1000 rpm.

  The melter is then connected to the tank and an emulsion is prepared by suction of the fatty phase to

 C for 10 min.

  This emulsion is then cooled by continuing

  before stirring until the temperature has reached C. The temperature is then lowered further

  and when this has reached 40 C, the polyty-

  trafluorethylene and the mixture thus obtained is stirred for

for 10 min.

  We then introduce the methyldibromoglutaroni-

  trile, phenoxyethanol and triethanolamine still at 400C and stirred for 10 min. We finally lower the temperature to 35 C before

  to incorporate the perfume composition.

Claims (7)

R E V E N D I C A T I O N S   1) Application of fluorinated resins in cosmetics   tology characterized in that fluorinated resins are introduced into cosmetic compositions for the skin and / or for the mucous membranes and / or for the integuments.   2) Application according to claim 1, ca-   characterized in that fluorinated resins are used for   maintain or improve the qualities of softness and   pleases the skin and gives it a pleasant feel.   3) Application according to claim 1, ca-   characterized in that fluorinated resins are used to protect the skin, mucous membranes and appendages from   external aggressions by creating a barrier guardian.   4) Application according to claim 1, ca-   characterized in that fluorinated resins are used for   maintain or improve the qualities of softness and   hair pleases thanks to a sheathing effect.    ) Application according to any one of claims 1 to 4, characterized in that the fluorinated resins are chosen from the group formed by homopolymers of tetrafluoroethylene, chlorotrifluoroethylene and vinylidene fluoride and by binary copolymers, d on the one hand, tetrafluoroethylene with hexafluoropropene, with perfluorovinyl ether and perfluoropropyl ether and with ethylene and, on the other hand, chlorotrifluoroethylene with ethylene.   6) Cosmetic or dermatological composition   for the skin and / or for the mucous membranes and / or for the appendages   res characterized in that it contains at least one fluorinated resin in the form of spherical particles   of small particle size incorporated in a suitable excipient   you. 7) Cosmetic or dermatological composition   according to claim 6, characterized in that it   closes at least one fluorinated resin chosen from the group defined in claim 5.   8) Cosmetic or dermatological composition   according to any one of claims 6 and 7, character-   laughed at in that it contains up to about 50% by weight at least one fluorinated resin.   9) Cosmetic or dermatological composition   according to any one of claims 6 to 8, character-   sée in that it contains at least one active ingredient with   which the fluorinated resin (s) cooperate so as to improve improve its bioavailability.   ) Cosmetic treatment process   characterized in that the mucous membranes are applied to the skin   his or her integuments, an effective amount of at least a fluorinated resin.