Topical composition

• US 20050074474A1
• Filed: 10/01/2004
• Published: 04/07/2005
• Est. Priority Date: 10/03/2003
• Status: Abandoned Application

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Sako, Takashi
• Application Number:
  US10/957,565
• Publication Number:
  US 20050074474A1
• Time in Patent Office: Days
• US Class Current: 424/401
• CPC Class Codes: A61K 2800/56 Compounds, absorbed onto or entrapped into a solid carrier, e.g. encapsulated perfumes, inclusion compounds, sustained release forms
• CPC Class Codes: A61K 2800/651 The particulate/core comprising inorganic material
• CPC Class Codes: A61K 8/0279 Porous; Hollow
• CPC Class Codes: A61K 8/25 Silicon; Compounds thereof
• CPC Class Codes: A61K 8/37 Esters of carboxylic acids
• CPC Class Codes: A61K 8/673 Vitamin B group
• CPC Class Codes: A61K 8/676 Ascorbic acid, i.e. vitamin C
• CPC Class Codes: A61Q 1/02 Preparations containing skin colorants, e.g. pigments preparations in powder form A61Q1/12
• CPC Class Codes: A61Q 1/10 for eyes, e.g. eyeliner, mascara
• CPC Class Codes: A61Q 13/00 Formulations or additives for perfume preparations essential oils or perfumes per se C11B9/00
• CPC Class Codes: A61Q 17/04 Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
• CPC Class Codes: A61Q 19/00 Preparations for care of the skin

Abstract

Disclosed is a topical composition comprising: (1) a porous spherical disintegrative silica impregnated with a water-insoluble skin benefit agent, wherein: (a) the porous spherical disintegrative silica has an average volume particle size of from about 3 μm to about 20 μm, a maximum particle size of no more than about 50 μm, and a pore volume of from about 1.5 cm³/g to about 3.0 cm³/g; and provides a certain dynamic viscoelasticity when sheared; (b) the water-insoluble skin benefit agent having a solubility in water at less than about 0.1 g/l at 25° C. and having a molecular weight of no more than about 5,000, selected from the group consisting of liquid water-insoluble skin benefit agents, solid water-insoluble skin benefit agents which dissolve in liquid water-insoluble skin benefit agents, solid water-insoluble skin benefit agents which dissolve in emollients and/or volatile solvents, and mixtures thereof; and (2) a suitable carrier.

Claims

1. A topical composition comprising:

(1) a porous spherical disintegrative silica impregnated with a water-insoluble skin benefit agent, wherein;

(a) the porous spherical disintegrative silica has an average volume particle size of from about 3 μ

m to about 20 μ

m, a maximum particle size of no more than 50 μ

m, and a pore volume of from about 1.5 cm³/g to about 3.0 cm³/g;

wherein when a paste is provided by mixing 40 g of squalane and 15 cm³/g of the porous spherical disintegrative silica;

the paste is impregnated between 2 mm thickness of 2 cm diameter parallel plates; and

the dynamic viscoelasticity of the paste is measured at the conditions of 2 Hz angular frequency and 10 Pa to 10 kPa of increasing shear stress;

the minimum value of [dlog storage modulus of elasticity]/[dlog shearing stress] is no less than about −

10;

(b) the water-insoluble skin benefit agent having a solubility in water at less than about 0.1 g/l at 25°

C. and having a molecular weight of no more than about 5,000, selected from the group consisting of liquid water-insoluble skin benefit agents, solid water-insoluble skin benefit agents which dissolve in liquid water-insoluble skin benefit agents, solid water-insoluble skin benefit agents which dissolve in emollients and/or volatile solvents, and mixtures thereof; and

(2) a suitable carrier.

2. The topical composition of claim 1 wherein the skin benefit agent is selected from the group consisting of skin lightening agents, skin soothing agents, skin repair agents, and mixtures thereof.

3. The topical composition of claim 1 wherein the skin benefit agent comprises ultraviolet absorbing agents.

4. The topical composition of claim 1 wherein the skin benefit agent comprises sensates and perfumes.

5. The topical composition of claim 1 wherein the composition is a powder cosmetic composition comprising:

(a) from about 0.01% to about 30% of the impregnated porous spherical disintegrative silica;

(b) from about 74% to about 98% of a pigment; and

(c) from about 1% to about 25% of a binder.

6. The topical composition of claim 1 wherein the composition is a water-in-oil emulsion cosmetic composition comprising:

(a) from about 0.01% to about 30% of the impregnated porous spherical disintegrative silica;

(b) from about 20% to about 80% of a continuous oil phase;

(c) from about 1% to about 60% of a discontinuous aqueous phase;

(d) an emulsifier; and

(e) a pigment.

7. The water-in-oil cosmetic composition of claim 6 further comprising a sufficient amount of a wax for providing the composition to be solid at room temperature.

8. The topical composition of claim 1 wherein the composition is an oil-in-water emulsion cosmetic composition comprising:

(a) from about 0.01% to about 30% of the impregnated porous spherical disintegrative silica;

(b) from about 20% to about 80% of a continuous aqueous phase;

(c) from about 1% to about 60% of a discontinuous oil phase; and

(d) an emulsifier.

9. The oil-in-water cosmetic composition of claim 8 further comprising a pigment.

10. The topical composition of claim 1 wherein the composition is a lipophilic cosmetic composition comprising:

(a) from about 0.01% to about 30% of the impregnated porous spherical disintegrative silica;

(b) from about 1% to about 20% of thickener; and

(c) a volatile solvent selected from the group consisting of hydrocarbon oil and silicone oil.