Hydrophilic foam pad for makeup removal

• US 4,806,572 A
• Filed: 05/04/1987
• Issued: 02/21/1989
• Est. Priority Date: 05/04/1987
• Status: Expired due to Term

• Current Assignee: Creative Products Resource, Inc. (Henkel AG & Co KGaA)
• Original Assignee: Creative Products Resource Associates, Ltd.
• Inventors: Kellett, George W.
• Primary Examiner(s): Kight, John
• Assistant Examiner(s): ACQUAH, SAMUEL A
• Application Number:
  US07/046,847
• Time in Patent Office: 659 Days
• Field of Search: 424/486, 424/28, 424/78, 521/112, 521/116, 521/130, 521/159, 521/163, 521/167, 521/172, 521/905
• US Class Current: 521/112
• CPC Class Codes: A61K 8/0208 Tissues; Wipes; Patches
• CPC Class Codes: A61K 8/37 Esters of carboxylic acids
• CPC Class Codes: A61K 8/375 the alcohol moiety containing more than one hydroxy group
• CPC Class Codes: A61K 8/90 Block copolymers A61K8/89 takes precedence
• CPC Class Codes: A61Q 1/14 Preparations for removing make-up
• CPC Class Codes: C08J 2205/05 Open cells, i.e. more than 50% of the pores are open
• CPC Class Codes: C08J 2375/04 Polyurethanes
• CPC Class Codes: C08J 2471/00 Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain of polyacetals C08J2459/00; of epoxy resins C08J2463/00; of polythioether-ethers C08J2481/02; of polyethersulfones C08J2481/06; Derivatives of such polymers
• CPC Class Codes: C08J 9/42 with macromolecular compounds
• CPC Class Codes: Y10S 521/905 Hydrophilic or hydrophobic cellular product

Abstract

A makeup remover pad is provided which comprises a resilient, open-celled hydrophilic foam matrix, wherein said matrix integrally incorporates an aqueous phase incorporating about 25-75% water, about 15-70% of a water-insoluble emollient oil, and an amount of surfactant effective to stabilize the aqueous phase so that it is released from the foam matrix as a homogeneous emulsion when the pad is applied to skin.

Claims

1. A makeup remover pad comprising a resilient, open-celled, hydrophilic polyurethane foam matrix, wherein said matrix integrally incorporates an aqueous phase incorporating about 25-75% water, about 15-70% of a water-insoluble liquid emollient oil, and an amount of surfactant effective to stabilize the aqueous phase so that it is released from the foam matrix as a homogenous emulsion when the pad is applied to skin, and wherein said aqueous phase contains no natural or synthetic wax.

2. The makeup remover pad of claim 1 wherein the surfactant comprises an anionic surfactant:

nonionic surfactant mixture in a weight ratio of about 1.5-0.75;

1.

3. The makeup remover pad of claim 2 wherein the surfactant mixture comprises about 1-15% of the aqueous phase.

4. The makeup remover pad of claim 1 wherein the emollient oil comprises about 20-45% of mineral oil, silicone fluid or mixtures thereof, and less than about 10% of an organic emollient ester.

5. The makeup remover pad of claim 1 wherein the emollient oil comprises about 5-20% of mineral oil, silicone fluid or mixtures thereof, and about 10-50% of an organic emollient ester.

6. The makeup remover pad of claim 1 wherein the aqueous phase comprises about 0.05-1.5% of an inorganic alkali metal or alkaline earth metal salt.

7. The makeup remover pad of claim 6 wherein the metal salt is sodium chloride.

20. A method of removing makeup from skin comprising applying the makeup remover pad of claims 1, 8, or 16 without pre-moistening the pad with water to a coating of makeup comprising a wax base, on said skin.

8. A makeup remover pad prepared by a process comprising:

(a) forming an aqueous reactant phase comprising about 25-75% water, about 25-65% of a water-insoluble lliquid emollient oil and about 1-15% of a mixture of anionic surfactant and nonionic surfactant in a weight ratio of about 1.5-0.75;

1, and wherein said aqueous reactant phase contains no natural or synthetic wax; and

(b) mixing said aqueous reactant phase with a water-foamable prepolymer resin which contains at least two free isocyanate groups per resin molecule so that the final mole ratio of water to total free isocyanate groups is about 20-150;

1, thereby converting the resin into a resilient, open-celled polyurethane foam body which integrally and releasably incorporates the aqueous reactant phase.

9. The makeup remover pad of claim 8 wherein the weight of the aqueous phase to the prepolymer resin phase is about 1-3:

1.

10. The makeup remover pad of claim 8 wherein the aqueous phase comprises about 5-40% mineral oil.

11. The makeup remover pad of claim 8 wherein the aqueous phase comprises about 5-50% of a water-insoluble fatty acid ester.

12. The makeup remover pad of claim 8 wherein the nonionic surfactant comprises a water-soluble polyoxethylene-polyoxpropylene block copolymer wherein the polyoxypropylene block has a molecular weight of about 1500-3500 and the polyoxyethylene is about 15-35% by weight of the copolymer.

13. The makeup remover pad of claim 8 wherein the nonionic surfactant comprises a polyol-fatty acid ester.

14. The makeup remover pad of claim 8 wherein the anionic surfactant comprises a fatty acid amine salt.

15. The makeup remover pad of claim 8 wherein the aqueous phase comprises about 0.05-1.5% of an inorganic salt which substantially increases the amount of the aqueous reactant phase which is released from the foam when the pad is applied to the skin.

16. A makeup remover pad prepared by a process comprising:

(a) forming an aqueous reactant phase comprising about 30-65% water, about 35-60% of a liquid mixture of mineral oil and a fatty acid ester comprising a (C₅ -C₃₀)alkyl (C₈ -C₁₂)fatty acid ester; and

about 2.5-10% of a mixture of (i) a copolymer of ethylene oxide with a polyoxypropylene block having a molecular wieght of about 1500-3500 and (ii) a C₈ -C₂₂ fatty acid mono ester of a C₂ -C₅ polyol; and

an anionic surfactant component comprising a fatty acid alkanol amine salt, in a weight ratio of nonionic surfactant component to anionic surfactant component of about 1.25-1;

1, and wherein said aqueous reactant phase contains no natural or synthetic wax; and

(b) mixing said aqueous reactant phase with a water-foamable prepolymer resin in a weight ratio of aqueous phase to prepolymer of about 2-1.5;

1, said prepolymer resin comprising a to1uene diisocyanate-capped polyakylenoxy ether comprising about 1.3-2.6 mEeq/g of isocyanate groups, so as to convert said resin into a hydrophilic, resilient, open-celled polyurethane foam body.

17. The makeup remover pad of claim 16 wherein the aqueous phase further comprises about 0.05-1.5% of an alkali metal halide.

18. The makeup remover pad of claim 16 wherein the aqueous phase comprises about 25-40% mineral oil and less than about 10% of the fatty acid ester.

19. The makeup remover pad of claim 16 wherein the aqueous phase comprises about 5-20% mineral oil and about 10-50% of the fatty acid ester.