Pigmented cosmetic compositions and method of making same

• US 5,382,433 A
• Filed: 01/21/1994
• Issued: 01/17/1995
• Est. Priority Date: 10/25/1989
• Status: Expired due to Term

• Current Assignee: Avon Products Incorporated
• Original Assignee: Avon Products Incorporated
• Inventors: Squires, Michael E., Martin, Shari R., Pahlck, Harold E.
• Primary Examiner(s): Page, Thurman K.
• Assistant Examiner(s): Spear, James M.
• Application Number:
  US08/184,962
• Time in Patent Office: 361 Days
• Field of Search: 424/64, 424/63, 424/69, 424/489, 424/401
• US Class Current: 424/401
• CPC Class Codes: A61K 2800/31 Anhydrous
• CPC Class Codes: A61K 2800/412 Microsized, i.e. having sizes between 0.1 and 100 microns
• CPC Class Codes: A61K 2800/43 Pigments; Dyes
• 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 8/044 Suspensions
• CPC Class Codes: A61K 8/11 Encapsulated compositions
• CPC Class Codes: A61K 8/25 Silicon; Compounds thereof
• CPC Class Codes: A61K 8/8152 Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers
• CPC Class Codes: A61Q 1/06 Lipsticks
• CPC Class Codes: A61Q 1/08 for cheeks, e.g. rouge
• CPC Class Codes: A61Q 1/10 for eyes, e.g. eyeliner, mascara
• CPC Class Codes: A61Q 1/12 Face or body powders for grooming, adorning or absorbing

Abstract

Cosmetic formulations have activatable dormant pigments dispersed in an anhydrous base or vehicle. Shear forces applied to the cosmetic formulation following application to the skin causes activation of the dormant pigment thereby releasing the pigment and giving the original color of the anhydrous base or vehicle renewed intensity or a "long wearing" affect.

Claims

1. A cosmetic formulation having a renewable palette of color shades comprising:

a base phase characterized by a color;

a quantity of microcapsules dispersed in said base phase, each said microcapsule containing a colorant which is released into the base phase when said microcapsules are fractured by mechanical action applied to said cosmetic formulation to produce an intense shade in the color which characterizes said base phase, each said microcapsule having a core comprising up to 70% pigment by weight, and the amount of said colorant being in the range of about 2% to about 60% of said base phase by weight; and

a quantity of colorant entrapping substrate particles dispersed in said base phase, each said colorant entrapping substrate particle having an irregular surface for entrapping said colorant which is released into said base phase when mechanical action is applied to said cosmetic formulation to produce a subtle shade in the color which characterizes said base phase, whereby the combined effect of said intense shade and said subtle shade produces a palette of color shades in said base phase which is renewable by mechanical action applied to said cosmetic formulation.

2. The cosmetic formulation of claim 1, wherein said quantity of microcapsules and said quantity of colorant entrapping substrate particles are selected in relative proportions in order to produce a desired palette of shades in the color which characterizes said base phase, in response to mechanical action applied to said cosmetic formulation.

3. The cosmetic formulation of claim 1, wherein each said colorant entrapping substrate particle comprises a cross-linked polymer.

4. The cosmetic formulation of claim 1, wherein said colorant entrapping substrate particles are selected from the group consisting of polymethacrylate, silica, porous nylon and compatible mixtures thereof.

5. The cosmetic formulation of claim 1, wherein said colorant in said microcapsules is dispersed in a liquid which is inert, hydrophobic, non-volatile and has low viscosity.

6. The cosmetic formulation of claim 5, wherein said liquid is selected from the group consisting of mineral oil, vegetable oil, squalene, castor oil, isopropyl myristate, isopropyl palmitate, peanut oil, landlin oil, silicone oil, diisopropyl dimerate and compatible combinations thereof.

7. The cosmetic formulation of claim 5, wherein said liquid includes mineral oil.

8. The cosmetic formulation of claim 1, wherein the amount of said colorant is in the range of about 2% to about of said base phase by weight.

9. The cosmetic formulation of claim 1, wherein said base phase comprises a color cosmetic selected from the group consisting of lipstick, foundation, face powder, blush and eye shadow.

10. The cosmetic formulation of claim 9, wherein said base phase is lipstick.

11. The cosmetic formulation of claim 9, wherein said base phase is blush.

12. The cosmetic formulation of claim 1, wherein the diameter of each said microcapsule is in the range of about 2 to about 20 microns.

13. The cosmetic formulation of claim 1, wherein said colorant entrapping substrate particles form agglomerates of about 20 to about 80 microns, said agglomerates further forming aggregates in the range of about 200 to about 1200 microns.