Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/0241—Containing particulates characterized by their shape and/or structure
  • A61K8/025—Explicitly spheroidal or spherical shape
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/0216—Solid or semisolid forms
  • A61K8/022—Powders; Compacted Powders
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/0241—Containing particulates characterized by their shape and/or structure
  • A61K8/0254—Platelets; Flakes
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/04—Dispersions; Emulsions
  • A61K8/06—Emulsions
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/73—Polysaccharides
  • A61K8/732—Starch; Amylose; Amylopectin; Derivatives thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
  • A61Q1/02—Preparations containing skin colorants, e.g. pigments
  • A61Q1/04—Preparations containing skin colorants, e.g. pigments for lips
  • A61Q1/06—Lipsticks
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
  • A61Q1/02—Preparations containing skin colorants, e.g. pigments
  • A61Q1/10—Preparations containing skin colorants, e.g. pigments for eyes, e.g. eyeliner, mascara
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
  • A61Q1/12—Face or body powders for grooming, adorning or absorbing
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
  • A61K2800/41—Particular ingredients further characterized by their size
  • A61K2800/412—Microsized, i.e. having sizes between 0.1 and 100 microns

Definitions

• the present invention relates to a cosmetic composition with optimized starch, and to cosmetic products obtained with said cosmetic composition.
• a cosmetic raw material especially if in powder form, to be acceptable from the point of view of sensory aesthetics, it is required to engineer or select the shape and size of the particles so as to have sufficiently small particles of spherical/spheroidal or lamellar shape, preferably having a smooth surface free of roughness.
• the particles used in cosmetics are preferably of spherical/spheroidal or lamellar/lenticular morphology.
• the lamellar particles are characterized by a smooth touch and are marked by a strong adhesion to the epidermis, thanks to the interaction between the skin surface and the face of each lamella.
• Raw materials for this purpose in the art are for example phyllosilicates (talc, natural mica, synthetic mica), graphite, hexagonal boron nitride and lauroyl lysine. Such ingredients are mainly used as solid excipients and lubricants. In the aforementioned raw materials, the lamellar morphology is largely determined by the anisotropic nature of the material.
• talc and mica are phyllosilicates and are marked by a crystalline structure which favors the production of lamellar powders, as the grinding fractures the material along a preferential direction.
• Graphite, boron nitride and lauroyl lysine also owe the lamellar structure to a crystalline organization in which there is a preferential direction of flaking or growth during crystallization.
• the particle size depends on the degree of grinding (silicates, graphite) or on the preparation conditions of the material, by direct synthesis or precipitation (lauroyl lysine, boron nitride, synthetic mica).
• the spherical ones enjoy a lower adhesion but a unique touch, thanks to the “ball-bearing” effect which allows to obtain a sophisticated sensoriality. Furthermore, such particles have optical properties adapted to achieve the soft-focus effect.
• Spherical particles are commonly obtainable from synthesis and the spherical silicas obtained, for example, by so-called Stober synthesis are known in the art.
• Polymers such as for example polymethyl methacrylate or nylon- 12, are obtained in spherical form, among other methods, by synthesis in emulsion/dispersion.
• the monodispersity of the particle size distribution is highly desirable for this kind of powder; homogeneous spherical particles in terms of size emphasize the so-called “ball-bearing” effect.
• Spherical raw materials owe the isotropy thereof to the synthesis process in which a spherical symmetry is maintained by growth from a core (silica) or by solidification of drops of liquid monomer during synthesis (in the case of polymers), which is transferred to the final powdery material.
• the synthesis process also determines the size of the particle, which would not be possible to obtain in a spherical shape by simply grinding a coarser material.
• Starch is a polymer material consisting of two polysaccharides (amylose and amylopectin) through which some plants store energy. Starch is ubiquitous in nature, and mainly potato, corn, rice, and wheat starches find technological application (paper mills, textiles, cosmetics, and food).
• the starches are obtained through low-temperature aqueous extraction processes, in which the pulp of the starchy plant is ground in order to break the cell walls and release the starch particles, which are then isolated by filtration, centrifugation, washing and drying. Such processes retain the native morphology of the particles if the process temperature does not exceed the starch solubilization temperature (generally >80°C).
• starches are reported in the cosmetic field, having an irregular globular shape, surfaces characterized by surface roughness, or poly- dispersed in terms of particle size distribution.
• corn, rice starch, oat starch, tapioca starch, and wheat starch is known.
• the commonly used starches are characterized by surfaces provided with edges (as in the case of corn, oats, rice, and tapioca) and, where the surface appears smooth, by a non- spherical shape (potato) and/or by bimodal particle size distribution (wheat).
• the aforesaid object is achieved by the cosmetic composition defined in claim 1, in particular using starches formed by native particles with selected morphology (spheroidal or lenticular/lamellar) and dimensions, having a smooth surface free of edges, harshness and roughness of any kind.
• selected morphology spheroidal or lenticular/lamellar
• the present invention has identified a series of starches with a spherical monodisperse morphology or lenticular/lamellar morphology which allow overcoming the problems normally posed by the use of irregularly shaped starches, generating cosmetic products with superior aesthetic features.
• Such starches can be further improved by a surface treatment (of a chemical and/or physical type) which modifies parameters thereof such as hydrophobicity and the ability to absorb oils.
• Surface treatment examples are coatings with silicones, oils, waxes, silica (physical) or reactive silanes (chemical).
• the isolation of a noble fraction for example, but not limited to, by air classification, sieving, decanting
• a noble fraction for example, but not limited to, by air classification, sieving, decanting
• grains often show a bimodal starch distribution, with so-called type A starch and so-called type B starch, each with specific features, as seen in figure 6.
• type A starch has a lenticular shape
• type B starch has an irregular shape.
• starches described above and depicted in figures 2-5 do not represent an exhaustive list of the possibilities offered by nature. However, as found in laboratory experiments, surprisingly some starches exceed, in terms of cosmetic properties, the currently used starches which do not have an optimized morphology as according to the present invention.
• the present invention solves various formulation problems of cosmetic compositions:
• Example 1 Compact powder (eyeshadow) - Ginger starch
• Example 2 Compact powder (eyeshadow) - Mung Bean Starch
• Example 3 Compact powder (eyeshadow) - Physically-modified Mung Bean Starch
• Example 4 Compact powder (eyeshadow) - Amaranth Starch
• Example 5 Compact powder (face powder) - White Turmeric Starch
• Example 6 Compact powder (face powder) - White Turmeric Starch and Chinese Taro Starch
• Example 7 Compact powder (face powder) - Wheat Starch (Type A) and Mung Bean Starch
• Example 8 Water ink - Vaccaria Starch
• Example 9 Lipstick - Mung Bean Starch (physically treated)

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Health & Medical Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Birds (AREA)
• Epidemiology (AREA)
• Chemical & Material Sciences (AREA)
• Dispersion Chemistry (AREA)
• Cosmetics (AREA)
• Polysaccharides And Polysaccharide Derivatives (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (7)

Cited By (1)

Citations (11)

Family Cites Families (13)

• 2020
  • 2020-03-05 IT IT102020000004687A patent/IT202000004687A1/it unknown
• 2021
  • 2021-03-01 US US17/908,132 patent/US12514809B2/en active Active
  • 2021-03-01 JP JP2022552579A patent/JP2023525435A/ja active Pending
  • 2021-03-01 KR KR1020227034742A patent/KR102949182B1/ko active Active
  • 2021-03-01 CN CN202180017444.4A patent/CN115175653B/zh active Active
  • 2021-03-01 WO PCT/EP2021/055030 patent/WO2021175775A1/en not_active Ceased
  • 2021-03-01 EP EP21708648.7A patent/EP4114340A1/en active Pending

Patent Citations (11)

Non-Patent Citations (2)

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