Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Patent
1998-08-20
2000-04-04
Dodson, Shelley A.
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
424 59, 424 64, 424 65, 424 701, 424400, 424484, 514944, A61K 700, A61K 742, A61K 7025, A61K 732, A61K 900
Patent
active
060458143
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to the use, as cosmetic products, of rigid gels which may be obtained by extrusion, as well as to the cosmetic and dermatological compositions used.
Various forms of products in solid form are known in the cosmetics industry, in particular in the field of make-up, for instance lipsticks, foundation sticks or eyeshadow sticks; in the field of skincare or lipcare, such as lip-repairing pencils and depigmenting, make-up-removing or moisturizing sticks; in the field of hygiene, for instance deodorant sticks and foaming cakes or sticks for shaving or for washing the skin.
The Applicant has discovered, surprisingly, novel compositions for cosmetic or dermatological use in the form of a rigid gel which may be obtained by an extrusion process.
Throughout the description, the expression rigid gel will be understood to refer to any gel having a compression strength of greater than or equal to 50 grams, at room temperature, after penetration by a cylindrical probe having a diameter of 0.8 cm into the gel matrix in a thickness of 5 mm, at a speed of 1 mm/s, maintenance of the said probe in the gel matrix for 15 seconds and removal of the said probe from the gel matrix at a speed of 1 mm/s, the compression strength being measured with a texture analyser of the type TAXT2 marketed by the company Rheo.
The compositions according to the invention may be in the form of a stick, a pencil or a cake and may in themselves constitute novel types of make-up products such as lipsticks, foundations, eyeshadows; novel types of care and/or conditioning products for the hair such as hard styling gels; novel types of products in stick form for facial or body care or hygiene.
The compositions according to the invention may be aqueous and have a matrix consisting of an aqueous gelled network. They may also be in anhydrous form with a matrix consisting of a dehydrated gelled network.
The aqueous compositions according to the invention may be partially rehydratable at the surface in contact with water at the time of use, thereby allowing good release of the cosmetically active products onto the keratin substance to be treated, and, after drying, rapidly resuming their initial solid form without any adverse change occurring. They may thus be reused subsequently by simple partial hydration at the surface. In the resting state, they are stable on storage and do not feel sticky.
The aqueous compositions of the invention may in particular constitute compositions in the form of make-up sticks which, unexpectedly, impart the colour effect, the sensation of freshness and the slippery feel directly to the skin without it being necessary to incorporate large amounts of fatty substances. In addition, they produce no greasy effect or sticky feel when they are applied, or any phenomenon of migration into the wrinkles on the face or at the edge of the eyelids, in contrast with conventional make-up sticks containing large concentrations of fatty substances (oils or waxes) for the purpose of obtaining the colour effect and the slippery feel. They may, moreover, contain water-soluble cosmetic or dermatological active agents which cannot be incorporated into common, generally anhydrous make-up sticks.
The compositions according to the invention may contain enough inorganic fillers and/or organic fillers to give satisfactory breakdown and qualities of softness.
The production of sticks whose matrix consists of an aqueous gelled network, of sufficiently high rigidity, requires the presence of at least one water-soluble gelling agent in high concentrations, generally greater than 20% by weight. Hitherto, it was not possible to manufacture such solid aqueous gels by the conventional techniques such as manufacture by casting.
The Applicant has discovered, unexpectedly, that homogeneous, stable, rigid sticks, whose gelled matrix may contain more than 20% by weight of water-soluble gelling agent and large amounts of fillers, can be produced according to an extrusion process which will be defined later.
The compositions according to t
REFERENCES:
patent: 3615972 (1971-10-01), Morehouse, Jr. et al.
patent: 5034216 (1991-07-01), Barone et al.
patent: 5612043 (1997-03-01), Deprez et al.
patent: 5635171 (1997-06-01), Nadaud
Derwent Abstract of JP 60 081 120, "Cosmetic Preparation--Self Crosslinked Sodium Polyacrylate", Derwent Publications, (1985).
Daubige Therese
Holz Katrin
Mellul Myriam
Roulier Veronique
"L'Oreal"
Dodson Shelley A.
Lamm Marina
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