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Lubricating members for razor cartridges

  • US 10,457,888 B2
  • Filed: 06/27/2016
  • Issued: 10/29/2019
  • Est. Priority Date: 06/30/2015
  • Status: Active Grant
First Claim
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1. A razor cartridge comprising:

  • a) a razor cartridge housing containing at least one blade;

    b) a guard member positioned on the razor cartridge housing forward of the at least one blade;

    c) a cap positioned on the razor cartridge housing aft of the at least one blade, wherein during a shaving stroke skin is contacted by the guard prior to the at least one blade, and the at least one blade prior to contacting the cap;

    said cap comprising at least one lubricating member, each lubricating member comprising;

    i) from about 25% to about 65% by weight of said lubricating member of a lipophilic structurant or mixture thereof, wherein said lipophilic structurant is selected from C14-C20 alcohols, microcrystalline wax, stearyloxytrimethylsilane, and mixtures thereof,ii) from about 20% to about 60% by weight of said lubricating member of a silicone polyether block copolymer, wherein said silicone polyether block copolymer consists essentially of repeating units of polyethylene oxide, silicone, and polypropylene oxide, at levels of;

    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 has a ratio of polyethylene oxide units to polypropylene oxide units to silicone units of from 20;

    65;

    15, andiii) from about 20% to about 40% by weight of said lubricating member of a liquid phase, wherein said liquid phase comprises a component selected from natural oil, synthetic oil, natural butter, triglyceride, petrolatum, silicone, and mixtures thereof;

    iv) wherein said silicone polyether block copolymer is free of any additional alkyl chains; and

    v) wherein said lubricating member is substantially free of soap.

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