SHAVING AID MATERIAL

• US 20090223057A1
• Filed: 03/06/2009
• Published: 09/10/2009
• Est. Priority Date: 03/07/2008
• Status: Active Application

• Current Assignee: Edgewell Personal Care Brands, LLC (Edgewell Personal Care Company)
• Original Assignee: Eveready Battery Company Incorporated (Energizer Holdings, Inc.)
• Inventors: Jannusch, Leonard, Coope-Epstein, Janet
• Application Number:
  US12/399,196
• Publication Number:
  US 20090223057A1
• Time in Patent Office: Days
• US Class Current: 30/41
• CPC Class Codes: A61K 2800/88 Two- or multipart kits
• CPC Class Codes: A61K 8/0216 Solid or semisolid forms
• CPC Class Codes: A61K 8/342 Alcohols having more than seven atoms in an unbroken chain
• CPC Class Codes: A61K 8/361 Carboxylic acids having more than seven carbon atoms in an unbroken chain; Salts or anhydrides thereof
• CPC Class Codes: A61K 8/86 Polyethers
• CPC Class Codes: A61Q 9/02 Shaving preparations
• CPC Class Codes: B26B 21/44 Means integral with, or attached to, the razor for storing shaving-cream, styptic, or the like
• CPC Class Codes: B26B 21/443 Lubricating strips attached to the razor head

Abstract

A shaving aid material is provided that includes a water-soluble lubricious shaving aid in combination with a water-insoluble erodable medium. In some embodiments, the shaving aid material further includes a water-soluble thermoplastic polymer, and may also include a plasticizer. Optional additional ingredients include emulsifiers, surfactants, skin conditioners, fragrances, depilatory agents, cleaning agents, medicinal agents, etc.

Claims

1. A shaving aid material, comprising:

a water-soluble shaving aid; and

a water-insoluble erodable medium that has a melting point above about 45°

C., and has a molecular weight below about 25,000; and

wherein the water-soluble shaving aid is at least partially soluble or miscible with the water-insoluble erodable medium.

2. The shaving aid material of claim 1, wherein the water-soluble shaving aid includes PEO.

3. The shaving aid material of claim 1, wherein the shaving aid material includes a water-soluble thermoplastic polymer.

4. The shaving aid material of claim 3, wherein the water-soluble thermoplastic polymer includes at least one of Hydroxypropyl cellulose, Polyvinylpyrrolidone, Polyvinylpyrrolidone/Vinyl Acetate copolymers, Poly(2-ethyl-2-oxazoline), and hydroxypropyl starch.

5. The shaving aid material of claim 1, wherein the shaving aid material includes a plasticizer.

6. The shaving aid material of claim 5, wherein the plasticizer includes at least one of isostearic acid, Triacetin, oleyl alcohol, and isostearyl alcohol.

7. The shaving aid material of claim 1, wherein the shaving aid material includes an emulsifier.

8. The shaving aid material of claim 1, wherein the water-insoluble erodable medium is malleable at normal ambient temperatures.

13. The shaving aid material of claim 1, wherein the water-insoluble erodable mediums include at least one of stearic acid, palmitic acid, 12-hydroxystearic acid, stearyl alcohol, cetyl alcohol, behenyl alcohol, cetearyl alcohol, arachidyl alcohol, C_20-40 and C_30-50 linear alcohols, paraffin wax, beeswax, carnauba wax, candelilla, soy wax, silicone wax, wax esters, hydrogenated castor oil, and polyethyle wax.

9. The shaving aid material of claim 9, wherein the water-insoluble erodable medium has a viscosity, when melted, that is below about 1000 centipoise.

10. The shaving aid material of claim 10, wherein the water-insoluble erodable medium comprises an amphipathic material.

11. The shaving aid material of claim 11, wherein the amphipathic material includes a fatty alcohol.

12. The shaving aid material of claim 11, wherein the amphipathic material includes a fatty acid.

14. A cartridge, comprising:

a frame;

at least on blade positioned in the frame; and

a shaving aid material, the shaving aid material comprising;

a water-soluble shaving aid; and

a water-insoluble erodable medium that has a melting point above about 45°

C., and has a molecular weight below about 25,000; and

wherein the water-soluble shaving aid is at least partially soluble or miscible with the water-insoluble erodable medium.

15. The cartridge of claim 15, wherein the shaving aid material is positioned aft of at least one of the blade(s).

16. The cartridge of claim 15, wherein the shaving aid material is positioned forward of at least one the blade(s).

17. The cartridge of claim 15, wherein the shaving aid material includes an aperture such that the shaving aid material substantially surrounds the blade(s).

18. The cartridge of claim 15, wherein the shaving aid material is affixed to the frame.

19. The cartridge of claim 15, wherein the shaving aid material is movable relative to the frame.

20. A method of making a shaving aid material, the steps for making the shaving aid material comprising:

providing an amount of at least one of a fatty alcohol or a fatty acid;

providing an amount of PEO;

heating the PEO and either or both of the fatty alcohol and fatty acid to a temperature less than about 115°

C.;

mixing the PEO and either or both of the fatty alcohol and fatty acid to create a mixture; and

forming mixture into a shaving strip.

21. The method of claim 21, wherein an anionic surfactant is also heated and mixed into the mixture prior to forming.

25. The method of claim 21, wherein a cationic surfactant is also heated and mixed into the mixture prior to forming the shaving strip.

26. The method of claim 21, wherein an emulsifier is also heated and mixed into the mixture prior to forming the shaving strip.

30. The method of claim 21, wherein a thermoplastic polymer is heated and mixed into the mixture prior to forming.

36. The method of claim 21, wherein the forming process includes injection molding the mixture into a mold.

22. The method of claim 22, wherein the shaving strip is formed through an extrusion process.

23. The method of claim 23, wherein the temperature of the mixture is less than 95°

C. during the extrusion process.

24. The method of claim 24, wherein the temperature of the mixture is less than 52°

C. during the extrusion process.

27. The method of claim 27, wherein the forming process includes pouring the mixture.

28. The method of claim 28, wherein the temperature of the mixture is less than 90°

C. during pouring.

29. The method of claim 29, wherein the temperature of the mixture is less than 85°

C. during pouring.

31. The method of claim 31, wherein an emulsifier is also heated and mixed into the mixture prior to forming.

34. The method of claim 31, wherein the forming process includes injection molding the mixture into a mold.

32. The method of claim 32, wherein the forming process includes pouring the mixture.

33. The method of claim 33, wherein the temperature of the mixture is less than 110°

C. during pouring.

35. The method of claim 35, wherein the temperature of the mixture is less than 75°

C. during injection molding, and the pressure is less than 10000 psi.

37. The method of claim 37, wherein the temperature of the mixture is less than 80°

C. during injection molding, and the pressure is less than 40000 psi.