# US 11,433,009 B2 · Surface-reacted calcium carbonate for the use as skin appearance modifier

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- Number: US 11,433,009 B2
- Document ID: US11433009B2
- Status: Granted
- Kind: B2
- Application number: 16/961,312
- Filed: 2019-01-23
- Published: 2021-03-18
- Granted: 2022-09-06
- Earliest claimed: 2018-01-26
- Assignees: Omya International AG
- Applicants: Omya International AG
- Inventors: Tanja Budde; Anaïs Hecker
- Web page: https://patentgrep.com/patent/US11433009B2

## CPC

- A61K 8/19: containing inorganic ingredients
- A61Q 1/02: Preparations containing skin colorants, e.g. pigments (preparations in powder form A61Q1/12)
- A61K 8/0229: {Sticks}
- A61K 8/0241: {Containing particulates characterized by their shape and/or structure (see also A61K8/04, A61K8/11, and A61K8/14, further aspects are classified in A61K2800/40 and subcodes)}
- A61Q 1/06: Lipsticks
- A61Q 1/10: for eyes, e.g. eyeliner, mascara
- A61Q 1/12: Face or body powders for grooming, adorning or absorbing
- A61Q 19/00: Preparations for care of the skin
- C01F 11/181: {Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by control of the carbonation conditions}
- A61K 2800/412: Microsized, i.e. having sizes between 0.1 and 100 microns
- A61K 2800/61: Surface treated
- A61K 2800/621: by inorganic compounds
- A61K 2800/651: The particulate/core comprising inorganic material
- C01P 2004/51: Particles with a specific particle size distribution
- C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer
- C01P 2004/62: Submicrometer sized, i.e. from 0.1-1 micrometer
- C01P 2004/64: Nanometer sized, i.e. from 1-100 nanometer
- C01P 2006/12: Surface area
- C01P 2006/14: Pore volume
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- C01F: COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts of peroxyacids C01B15/00; sulfides or polysulfides of magnesium, calcium, strontium, or barium C01B17/42; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds other than ammonia or cyanogen containing nitrogen and non-metals and optionally metals C01B21/082; amides or imides of silicon C01B21/087}; metal {imides or} amides C01B21/092, {C01B21/0923}; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanic acid C01C3/14; salts of cyanamide C01C3/16; thiocyanates C01C3/20; {double sulfates of magnesium with sodium or potassium C01D5/12; with other alkali metals C01D15/00, C01D17/00})
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

## Abstract

The present invention refers to the use of a surface-reacted calcium carbonate having a volume median particle size d50 from 0.1 to 90 μm as skin appearance modifier in a cosmetic and/or skin care composition.

## Claims

### Claim 1

A method for modifying skin appearance of a person and/or in modifying the skin feel as perceived by the person comprising applying to the skin of the person a cosmetic and/or skin care composition comprising a surface-reacted calcium carbonate having a volume median particle size d50 from 0.1 to 90 μm,
wherein the surface-reacted calcium carbonate is a reaction product of natural ground calcium carbonate or precipitated calcium carbonate with carbon dioxide and one or more H3O+ ion donors, wherein the carbon dioxide is formed in situ by the H3O+ ion donors treatment and/or is supplied from an external source,
the amount of the surface-reacted calcium carbonate in the cosmetic and/or skin care composition is from 0.1 to 5 wt-% based on the total weight of the cosmetic and/or skin care composition, and
the method results in the appearance of the skin being modified and/or in modifying the skin feel as perceived by the person.

### Claim 2 (depends on 1)

The method of claim 1, wherein the surface-reacted calcium carbonate has a volume median particle size d50 from 0.5 to 50 μm.

### Claim 3 (depends on 1)

The method of claim 1, wherein the surface-reacted calcium carbonate has a specific surface area of from 15 m2/g to 200 m2/g, measured using nitrogen and the BET method.

### Claim 4 (depends on 1)

The method according to claim 1, wherein
the natural ground calcium carbonate is selected from the group consisting of marble, chalk, limestone, and mixtures thereof, or
the precipitated calcium carbonate is selected from the group consisting of precipitated calcium carbonates having an aragonitic, vateritic or calcitic crystal form, and mixtures thereof.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the at least one H3O+ ion donor is selected from the group consisting of hydrochloric acid, sulphuric acid, sulphurous acid, phosphoric acid, citric acid, oxalic acid, an acidic salt, acetic acid, formic acid, and mixtures thereof.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the appearance of the skin being modified is by (a) covering and/or opacifying the skin surface, (b) decreasing the gloss and/or shininess of the skin surface, and/or (c) modifying the skin colour.

### Claim 7 (depends on 1)

The method according to claim 1, wherein the cosmetic and/or skin care composition has a pH value of ≤8.5.

### Claim 8 (depends on 1)

The method according to claim 1, wherein the surface-reacted calcium carbonate is present in the cosmetic and/or skin care composition in an amount from 0.1 to 50 wt.-%, based on the total weight of the composition.

### Claim 9 (depends on 1)

The method according to claim 1, wherein the cosmetic and/or skin care composition further comprises water and/or at least one oil.

### Claim 10 (depends on 1)

The method according to claim 1, wherein the cosmetic and/or skin care composition comprises at least one active agent being adsorbed onto and/or absorbed into the surface of the surface-reacted calcium carbonate.

### Claim 11 (depends on 10)

The method according to claim 10, wherein the at least one active agent is selected from pharmaceutically active agents, biologically active agents, vitamins, disinfecting agents, preservatives, flavouring agents, surfactants, oils, fragrances, essential oils, and mixtures thereof.

### Claim 12 (depends on 1)

The method according to claim 1, wherein the composition further comprises at least one additive selected from the group consisting of bleaching agents, thickeners, stabilizers, chelating agents, preserving agents, wetting agents, emulsifiers, emollients, fragrances, colorants, skin tanning compounds, antioxidants, minerals, pigments, UV-A and/or UV-B filter, and mixtures thereof.

### Claim 13 (depends on 1)

The method according to claim 1, wherein the cosmetic and/or skin care composition is selected from an eye make-up product, a facial make-up product, a lip care product, a hand care product, a skin care product, or a combination product thereof.

### Claim 14 (depends on 1)

The method according to claim 1, wherein the cosmetic and/or skin care composition has a Brookfield viscosity in a range from 4,000 to 50,000 mPas at 25° C.

### Claim 15 (depends on 1)

The method according to claim 1, wherein the surface-reacted calcium carbonate provides skin feel modification.

### Claim 16 (depends on 1)

The method according to claim 1, wherein the at least one H3O+ ion donor is selected from the group consisting of hydrochloric acid, sulphuric acid, sulphurous acid, phosphoric acid, oxalic acid, H2PO4−, being at least partially neutralised by a cation selected from Li+, Na+ and/or K+, HPO42−, being at least partially neutralised by a cation selected from Li+, Na+, K+, Mg2+, and/or Ca2+, and mixtures thereof.

### Claim 17 (depends on 1)

The method according to claim 1, wherein the method results in the appearance of the skin being modified such that the appearance of the skin surface is modified by (a) covering and/or opacifying the skin surface and/or (b) decreasing the gloss and/or shininess of the skin surface.

### Claim 18 (depends on 1)

The method according to claim 1, wherein the cosmetic and/or skin care composition has a pH value of ≤8.0.

### Claim 19 (depends on 1)

The method according to claim 1, wherein the surface-reacted calcium carbonate is present in the cosmetic and/or skin care composition in an amount from 0.5 to 20 wt.-%, based on the total weight of the composition.

### Claim 20 (depends on 1)

The method according to claim 1, wherein the cosmetic and/or skin care composition further comprises water, and/or at least one oil selected from the group consisting of vegetable oils and esters thereof, alkanecoconutester, plant extracts, animal fats, siloxanes, silicones, fatty acids and esters thereof, petrolatum, glycerides and pegylated derivatives thereof.

### Claim 21 (depends on 1)

The method according to claim 1, wherein the cosmetic and/or skin care composition has a Brookfield viscosity in a range from 10,000 to 45,000 mPas at 25° C.