# US 11,433,017 B2 · Process for producing a wax preparation

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- Number: US 11,433,017 B2
- Document ID: US11433017B2
- Status: Granted
- Kind: B2
- Application number: 16/473,556
- Filed: 2017-12-28
- Published: 2020-05-07
- Granted: 2022-09-06
- Earliest claimed: 2016-12-28
- Applicants: Schwan-Stabilo Cosmetics GmbH & Co. KG
- Inventors: Ingolf Kahle; Simona Lebok; Christian Sprogar
- Web page: https://patentgrep.com/patent/US11433017B2

## CPC

- A61K 8/92: Oils, fats or waxes; Derivatives thereof, e.g. hydrogenation products thereof
- A61K 8/922: {of vegetable origin}
- A61K 8/0216: {Solid or semisolid forms}
- A61K 8/064: {Water-in-oil emulsions, e.g. Water-in-silicone emulsions}
- A61K 8/31: Hydrocarbons
- A61K 8/37: Esters of carboxylic acids
- A61K 8/60: Sugars; Derivatives thereof
- A61K 8/8152: {Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers}
- A61K 8/87: Polyurethanes
- A61K 8/891: saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
- A61Q 1/10: for eyes, e.g. eyeliner, mascara
- A61K 2800/596: Mixtures of surface active compounds
- 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

## Abstract

A process for the production of a solid cosmetic preparation is described wherein a wax phase comprising at least one wax, at least one oil, and if applicable, oil-soluble ingredients and solvents are melted, the molten wax phase is mixed with an aqueous phase comprising at least one water-soluble or water-soluble water-dispersible film former and with a w/o emulsifying system until an emulsion is formed, and the resulting emulsion is allowed to cool to form a wax matrix with aqueous phase droplets embedded therein, and the products made therefrom and their use.

## Claims

### Claim 1

A wax preparation, comprising:
a continuous wax phase comprising at least one wax; and
2%-10% of a volatile silicone oil; and
1%-10% of a water-in-oil emulsifying system,
wherein the water-in-oil emulsifying system comprises: a sucrose ester-based emulsifier selected from the group consisting of sucrose laurate, sucrose stearate, sucrose distearate, sucrose polystearate, and combinations thereof, and
a polyglyceryl fatty acid ester-based emulsifier selected from the group consisting of a polyglyceryl-5 dioleate, polyglyceryl-10 diisostearate, polyglyceryl-6 distearate, and combinations thereof; and
a discontinuous aqueous phase comprising water and 8%-25% film former, wherein the film former is a mixture of polyurethane 35 and styrene/acrylates/ammonium methacrylate copolymer.

### Claim 2

A pencil lead for a pencil, comprising:
a solid-form preparation, wherein the solid-form preparation comprises
a continuous wax phase comprising at least one wax; and
2%-10% of a volatile silicone oil; and
1%-10% of a water-in-oil emulsifying system,
wherein the water-in-oil emulsifying system comprises: a sucrose ester-based emulsifier selected from the group consisting of sucrose laurate, sucrose stearate, sucrose distearate, sucrose polystearate, and combinations thereof, and
a polyglyceryl fatty acid ester-based emulsifier selected from the group consisting of a polyglyceryl-5 dioleate, polyglyceryl-10 diisostearate, polyglyceryl-6 distearate, and combinations thereof; and
a discontinuous aqueous phase comprising water and 8%-25% film former, wherein the film former is a mixture of polyurethane 35 and styrene/acrylates/ammonium methacrylate copolymer.