Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions
Reexamination Certificate
2001-01-29
2002-12-10
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
C424S070110, C424S070120, C424S401000, C424S489000, C424S070270
Reexamination Certificate
active
06491902
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a controlled delivery system that can be incorporated into hair care products such as shampoos, conditioners, hair styling products, and other hair care products and that effectively delivers a broad range of active ingredients and sensory markers onto hair, prolongs their release rate over an extended period of time, or provides heat triggered release and high impact fragrance “burst” upon blow drying the hair. The present invention also introduces a novel concept of synchronizing the release of the active ingredients with that of a sensory marker to convey to the consumer the product performance.
2. Description of the Related Art
Consumers are becoming increasingly educated and expect a high level of sophistication and multi functionality in their hair care products. They expect the product not only to clean, but also condition, nourish, and provide a lasting impression of clean hair and freshness. Consumer acceptance of hair care products is determined not only by the performance achieved with these products but the perception and aesthetics associated therewith. There is also a need to convey to the consumer the product performance and effectiveness (i.e., the hair is clean, the hair is being conditioned and nourished, etc.). Fragrance is an important aspect of the successful hair care products and they can also be utilized, in addition to imparting an aesthetically pleasing odor, to convey the consumer the product performance.
Fragrance creation for hair care products is restricted not only by considerations such as availability and cost, but also by compatibility of the fragrance ingredients with other components in the product composition and the ability of the fragrance ingredients to deposit onto the hair and survive the wash and rinse process. Furthermore, a large amount of fragrance is often lost during the rinse and drying processes, even when the hair is air-dried. Practice has shown that when current commercial hair care products are used, very little of the fragrance is actually substantive onto the hair.
Publications in the prior art indicate attempts to fulfill the foregoing needs to increase the deposition of active ingredients and fragrances onto hair and to hinder or delay their release rate so that the hair is healthier and remains aesthetically pleasing for a prolonged length of time.
A conventional approach that has been described employs emulsions, liposomes, and other lipid vesicles to deposit the active ingredients onto the hair. See U.S. Pat. Nos. 4,942,038; 5,124,081; 5,198,470; 5,330,758; 5,510,120; 5,518,736; 5,591,449; 5,658,575; 5,660,853; 5,741,518; 5,753,241; 5,759,526; 5,773,611; 5,814,343; 5,874,105; 5,885,564; 5,925,364; 6,010,707; 6,015,574; 6,039,936; 6,066,328; 6,071,535; and 6,126,948. These types of systems have the limitation of being unstable, and can only be used for encapsulation of certain types of materials. Stability has limited the use of liposomes for controlled delivery, both in terms of shelf life and after administration.
U.S. Pat. No. 5,354,564 discloses personal care products comprising an aqueous dispersion of particles of silicone wherein said particles have a surface modifier adsorbed on the surface thereof in an amount sufficient to achieve a particle size of less than about 400 nanometers (nm). The particles of this invention contain a discrete phase of silicone having a surface modifier adsorbed on the surface thereof. Suitable surface modifiers can preferably be selected from known organic and inorganic excipients. Such excipients include various polymers, low molecular weight oligomers, natural products and surfactants. Preferred surface modifiers include nonionic and anionic surfactants.
U.S. Pat. No. 5,599,531 discloses the uses of inorganic charged colloidal silica as a carrier system for hair care products. The penetration or absorption of water, oils, collagen, and other materials into the hair is greatly increased by adding a small quantity of inorganic charged colloidal silica to provide an aqueous suspension of the charged colloidal silica particles along with the material to be absorbed into the hair. In coloring hair, dye components can be absorbed into the hair without the use of alkaline solutions which damage the hair, and in perming hair, the disulfide bonds in the hair can be broken by tension caused by swelling due to water absorption in the hair, again without the use of damaging alkaline solutions. It is believed that the porosity and stable hydration of the hair can be varied through altering the electrostatic charge on the hair. The aqueous suspension of charged silica particles applied to the hair appears to alter this charge.
U.S. Pat. No. 5,660,839 discloses incorporating deformable hollow particles into cosmetic and/or dermatological compositions containing fatty substances, for markedly reduce or eliminate the sticky and/or greasy feel attributed to these fatty substances. Preferably, the particles are in the form of hollow microspheres or microbeads, having a particle size ranging from 1 micron to 250 microns, and comprising a copolymer of vinylidene chloride, acrylonitrile and a (meth)acrylate co monomer.
U.S. Pat. No. 5,667,800 discloses an aqueous suspension of solid lipoid nanoparticles, comprising at least one lipid and preferably also at least one emulsifier, for topical application to the body. The nano-particles disclosed are preferably non-ionic and the emulsifiers used in the processing of these particles are preferably chosen from the groups of polyoxyethylene alkyl ethers and sorbitan esters. The particles have a mean particle size of between 50-1000 nm and their concentration is between 0.01-60 wt %, by weight of the suspension. A medicament can be incorporated into the continuous phase of the suspension or in a vehicle, which is added to the suspension. The invention further provides manufacturing methods for the aqueous suspension.
U.S. Pat. No. 5,780,060 discloses microcapsules with a wall of crosslinked plant polyphenols and compositions containing them. The microcapsules are obtained by the interfacial crosslinking of plant polyphenols, particularly flavonoids. When incorporated in a composition such as a cosmetic, pharmaceutical, dietetic or food composition, these microcapsules make it possible to prevent any impairment of this composition, in particular any color modification, while at the same time preserving the activity, especially the anti-free radical and/or antioxidizing activity, of the plant polyphenols, particularly the flavonoids.
U.S. Pat. Nos. 5,851,517 and 5,945,095 disclose compositions including a dispersion of polymer particles in a non-aqueous medium. A dispersion of surface-stabilized polymer particles can be used in a non-aqueous medium, in a cosmetic, hygiene or pharmaceutical composition. The dispersions may, in particular, be in the form of nano-particles of polymers in stable dispersion in a non-aqueous medium. The nano-particles are preferably between 5 and 600 nm in size, given that beyond about 600 nm, the particle dispersions become much less stable. The polymers used can be of any nature, such as radical polymers, polycondensates or polymers of natural origin. These polymers may, in particular, be crosslinked. Among the non-film-forming polymers described are vinyl or acrylic radical copolymers or homopolymers, which are optionally crosslinked, preferably having a Tg of greater than or equal to 40 degree C, such as polymethyl methacrylate, polystyrene, or poly-tert-butyl acrylate.
U.S. Pat. Nos. 5,759,526 and 5,919,487 disclose nanoparticles coated with a lamellar phase based on silicone surfactant and compositions containing them. The nanoparticles, and in particular nanocapsules, provided with a lamellar coating obtained from a silicone surfactant, can be used in a composition, in particular a topical composition, for treatment of the skin, mucosae, nails, scalp and/or hair. Nanoparticles ranging in size from 10 to 1000 nm are composed of a polymer enc
Shefer Adi
Shefer Shmuel David
Howard S.
Mathews, Collins Shepherd & McKay, P.A.
Page Thurman K.
Salvona LLC
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