LUBRICATING MEMBERS FOR RAZOR CARTRIDGES

• US 20170002287A1
• Filed: 06/27/2016
• Published: 01/05/2017
• Est. Priority Date: 06/30/2015
• Status: Active Grant

• Current Assignee: The Gillette Company LLC (The Procter & Gamble Company)
• Original Assignee: Gillette Company (The Procter & Gamble Company)
• Inventors: Reese, Poppy Clea, Stephens, Alison Fiona
• Granted Patent: US 10,457,888 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61K 2800/87 Application Devices; Containers; Packaging
• CPC Class Codes: A61K 8/0216 Solid or semisolid forms
• CPC Class Codes: A61K 8/31 Hydrocarbons
• CPC Class Codes: A61K 8/342 Alcohols having more than seven atoms in an unbroken chain
• CPC Class Codes: A61K 8/894 modified by a polyoxyalkylene group, e.g. cetyl dimethicone copolyol
• CPC Class Codes: A61Q 9/02 Shaving preparations
• CPC Class Codes: B26B 21/443 Lubricating strips attached to the razor head
• CPC Class Codes: C10M 111/04 at least one of them being a macromolecular organic compound
• CPC Class Codes: C10M 169/04 Mixtures of base-materials and additives
• CPC Class Codes: C10M 2203/10 Petroleum or coal fractions, e.g. tars, solvents, bitumen
• CPC Class Codes: C10M 2203/1006 used as base material
• CPC Class Codes: C10M 2205/143 used as base material
• CPC Class Codes: C10M 2207/021 having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 2207/0215 used as base material
• CPC Class Codes: C10M 2207/2815 used as base material
• CPC Class Codes: C10M 2207/401 used as base material
• CPC Class Codes: C10M 2227/045 used as base material
• CPC Class Codes: C10M 2229/025 used as base material
• CPC Class Codes: C10M 2229/0475 used as base material
• CPC Class Codes: C10N 2020/04 Molecular weight; Molecular weight distribution
• CPC Class Codes: C10N 2030/06 : Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• CPC Class Codes: C10N 2030/08 : Resistance to extreme temperature
• CPC Class Codes: C10N 2050/08 : Solids

Abstract

The invention relates to a lubricating member for a razor cartridge comprising a lipophilic structurant and a silicone polyether block copolymer and optionally a liquid phase, which can be manufactured in a simple one batch process without thermal degradation and exhibiting improved lubricating and skin care properties over a sustained period.

Claims

1. A lubricating member for a razor cartridge comprising

a) from about 10% to about 80% by weight of the lubricating member of a lipophilic structurant or mixture thereof,

b) from about 0.1% to about 60% by weight of a silicone polyether block copolymer, wherein said silicone polyether block copolymer comprises from about 1% to about 50%, by weight of polyethylene oxide, from about 20% to about 90% by weight of polypropylene oxide and from about 1% to about 20% by weight of silicone and

c) optionally from about 10% to about 70% by weight of a liquid phase.

2. A lubricating member according to claim 1, wherein said lipophilic structurant has a melting point of at least about 45°

C.

3. A lubricating member according to claim 1, wherein said lipophilic structurant has a melting point of from at least about 45°

C. to less than about 90°

C.

4. A lubricating member according to claim 1, wherein said silicone polyether block copolymer has a molecular weight of from about 600 to about 30000.

5. A lubricating member according to claim 1, wherein said silicone polyether block copolymer has a molecular weight of from about 10000 to about 19000.

6. A lubricating member for a razor cartridge according to claim 1 wherein said lipophilic structurant is selected from C14-C20 alcohols, microcrystalline wax, stearyloxytrimethylsilane and mixtures thereof, and is preferably selected from cetyl alcohol, stearyl alcohol and mixtures thereof.

7. A lubricating member for a razor cartridge according to claim 1, wherein said member comprises a hydrophobic liquid phase.

8. A lubricating member for a razor cartridge according to claim 1, wherein said member comprises a liquid phase comprising a component selected from natural oil, synthetic oil, natural butter, triglyceride, petrolatum, silicone and mixtures thereof.

9. A lubricating member for a razor cartridge according to claim 8, wherein said liquid phase comprises a material selected from capric and or caprylic triglycerides, olive oil, shea butter, cocoa butter, isopropyl isostearate, petrolatum, dimethicone, phenylated silicones and mixtures thereof.

10. A lubricating member for a razor cartridge according to claim 1, wherein said liquid phase has a melting point of less than about 40°

C.

11. A lubricating member for a razor cartridge according to claim 1, wherein said liquid phase has a melting point of less than about 30°

C.

12. A lubricating member according to claim 1, comprising from about 25% to about 65% of said lipophilic structurant, from about 10% to about 40% of said liquid phase and from about 20% to about 60% of said silicone polyether block copoplymer.

13. A lubricating member according to claim 1, wherein said member comprises less than about 5% by weight of a water insoluble polymeric structurant.

14. A lubricating member according to claim 1, wherein said member comprises less than about 1% by weight of a water insoluble polymeric structurant.

15. A hair removal cartridge comprising a lubricating member according to claim 1.

16. A method of manufacturing a lubricating member according to claim 1, comprising the steps of

a) Melting said lipophilic structurant to a temperature of about 85°

C. and stirring

b) Adding said silicone polyether block copolymer and stirring

c) Cooling the temperature of the resultant mixture to about 55°

C.

d) Adding the remaining optional components whilst stirring

e) Transferring the molten mixture into a mold or container.