Cosmetic formulation having a palette of color shades renewable by mechanical action

• US 5,320,835 A
• Filed: 08/26/1992
• Issued: 06/14/1994
• Est. Priority Date: 10/25/1989
• Status: Expired due to Term

• Current Assignee: Avon Products Incorporated
• Original Assignee: Avon Products Incorporated
• Inventors: Martin, Shari R., Pahlck, Harold E., Squires, Michael E.
• Primary Examiner(s): Page, Thurman K.
• Assistant Examiner(s): Spear, James M.
• Application Number:
  US07/935,646
• Time in Patent Office: 657 Days
• Field of Search: 424/63, 424/64
• US Class Current: 424/64
• 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, said microcapsules each 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, said microcapsules each having a diameter in the range of about 2 to about 20 microns; and

a quantity of colorant entrapping substrate particles dispersed in said base phase, said colorant entrapping substrate particles each 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, said colorant entrapping substrate particles forming agglomerates of about 20 to about 80 microns, said agglomerates further forming aggregates in the range of about 200 to about 1200 microns, 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.