Drug – bio-affecting and body treating compositions – Face or body powders for grooming – adorning – or absorbing
Reexamination Certificate
1999-11-10
2002-10-08
Dees, Jose′ G. (Department: 1616)
Drug, bio-affecting and body treating compositions
Face or body powders for grooming, adorning, or absorbing
C424S401000, C424S489000
Reexamination Certificate
active
06461595
ABSTRACT:
FIELD OF THE INVENTION
This invention refers to a cosmetic composition in the powder form for various applications, particularly those known as eye shadow, blush, face powder and compact makeup.
BACKGROUND OF THE INVENTION
Cosmetic compositions in the form of powder are well known and they are applicable as eye shadow, blush, face powder and compact makeup.
Most of said compositions present several disadvantages, such as being a complex composition and therefore expensive, demanding the use of manufacturing processes equally costly, they have a “sensorial” far from the desired one, and they prosent certain deficiencies after some time of use, such as cracking or general discontinuities.
Patent Application EP 310472 discloses a process for compacting such a cosmetic composition as well as an equipment for the execution of said process addressed to the manufacturing of compact powders, the major disadvantage of which is the need of specialized equipment, other than the usual commercially available standards, which increases the cost of the manufacturing process.
Patent Application EP 624361 discloses the manufacturing of cosmetic products in the form of powder which must include the addition of silica, silicon, or the spheres commercially known by the name of Expancel in order to be free from cracks, resulting in an expensive product and a complicated manufacturing process.
Patent Application EP 467743 discloses the manufacturing process of compact powders containing from 5 to 80% of thermoplastic products and which employs ultrasound for mixing its several components, also resulting in an expensive product and a complicated manufacturing process.
Patent Application EP 692242 describes the use of particles with a large granulometric specter, ranging from 1 to 250 microns, which are subject to deformation and as such, may present an undesirable sensorial variation depending on the different levels of pressure applied by the users at the time of using the product. To overcome this variable deformation disadvantage resulting from the differences of pressure applied by the users, the above mentioned application recommends that said particles be coated with lysine, which again raises the cost of the finished product, in addition of providing a sensorial effect which is not pleasant to all users.
Document EP 652209 describes the coating of various particles of cosmetic powders with a view of improving their compressibility.
Document EP 605284 describes a cosmetic composition which consists of a powder with a maximum density of 0.07 present in a range of 5 to 30% by weight. Such density of the powder substantially increases the difficulty of handling the product.
Another prior art document, namely EP 502769, discloses a cosmetic composition as a dispersion of solid particles which represent at least 50% by weight, or at least 75% by volume, in relation to the total load of particles, which present a spherical or spheroid shape with dimensions ranging from 0.5 to 50 microns. Said composition makes use of spherical or spheroid particles, a low content of lamellar particles, organic mineral material, or synthetic polymers, and pigments of smaller dimensions. Being a dispersion, the process for manufacturing same is costly and complicated, and by making use of small dimension pigments, it impairs their capacity of reflecting light, which would more satisfactorily correct small skin imperfections.
Document EP 651991 discloses a compound in the form of oil/water or water/oil emulsion for makeup containing mica, mica-titanium, white clay, zinc oxide and titanium, plane and expandable microspheres. As an emulsion, special equipment is required for its production which again increase the final costs.
Document EP 511092 describes the coating of microspheres in general, without any specific appeal.
Document EP 486394, on the other hand, describes the manufacturing of compact powders with the inclusion of hollow silica microspheres and solvents, resulting in a powder of difficult transportation which stains its own packaging and looks brittle.
Document GB 2 191 945 describes the use of microspheres in a noncompacted powder of synthetic material with an specific gravity of less than 0.1 g/cm
3
, such as that which is commercialized under the name of Expancel, and which is disadvantageously limited for use in compositions of compacted form.
Document EP 717 979 discloses a compact powder composition that comprises an oily phase and a powdered phase, resulting in a product of the “powder-cream” type, the sensorial of which raises objections from many users, and which requires a step of freeze-drying, thus raising its final product cost.
Document EP 447 287 describes a cosmetic composition limited to compositions of the compact type, comprising porous microspheres of thermoplastic material. This application describes as being advantageous the association of such microspheres, known as Expancel, to micronized talcum powder and hexagonal boron nitride. The use of said porous microspheres necessarily associated with the hexagonal boron nitride does not warrant a sensorial accepted by most of the users, in addition to raising the cost of the product.
Document EP 462 709 describes a cosmetic composition comprising, among several ingredients, particulated nylon smaller than 20 microns. Said composition is not satisfactory concerning sensorial, and also presents a non competitive cost.
Document EP 530 085 discloses a cosmetic composition in the form of a stable dispersion in an aqueous phase, containing two types of hydrosoluble acrylic polymers. As previously discussed, being a dispersion, its final cost is elevated.
Likewise, document EP 545786 discloses a composition in the form of a dispersion in an adequate ligand, in the presence of perfluoralkyl, which is formulated in the form of a water/oil or oil/water emulsion with the oil phase representing up to 50% of the total weight of the composition.
It should be noted that a great portion of the already known solutions make use of hollow expansible microspheres with a view to obtaining cosmetic powders, which is a product of extremely high cost and of difficult availability in the market.
The obtaining of these and other similar microspheres, and the application thereof into cosmetic compositions which generically are either too expensive or fail to provide the desired sensorial effect, is described in several other patent documents, which are hereby incorporated by reference, such as U.S. Pat. No. 3,615,972, EP 056 219, U.S. Pat. No. 3,611,583, EP 112 807, EP 320 472, EP 379 409, EP 486 080, WO 93/04660, EP 566 442, FR 9 300 990 and EP 704 205.
OBJECTIVES OF THE INVENTION
It is, therefore, an objective of the present invention to provide a cosmetic composition in the form of a powder that overcomes all the disadvantages of the prior art, by presenting an ultrafine texture without having the consistence of a cream, since it does not contain a high concentration of oily ingredients.
It is further desired that the adherence of said composition to the skin be not provided solely by the characteristics of the oily phase, but also by the lamellar shape of some of the components of its formulation.
It is also an objective of the invention to provide a cosmetic powder composition which allows its easy manipulation without making use of expensive processes and materials, and which is capable of minimizing small skin defects without resulting in the aspect of an artificial skin. Further to that, its texture must facilitate the application of the product without interfering in the grinding and compacting process, particularly due to the presence of microspheres derived from organic material.
Additionally, it is also required that an adequate selection of the nature of the ingredients as well as the percentage thereof is effected so that the composition may result in an improved synergy, integrating the ingredients in such way as to advantageously include cosmetic materials such as the microspheres of marine collagen that maintain the natural moisturizing of the skin
Barros Cristiane Rita
Leo Claudia
Rodrigues Adriana Amaral
Dees Jose′ G.
George Konata M.
Industria e Comercio de Cosmeticos Natura Ltda.
Smith , Gambrell & Russell, LLP
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