Lubricating members for razor cartridges
First Claim
Patent Images
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.
3 Assignments
0 Petitions
Accused Products
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.
-
Citations
14 Claims
-
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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. 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 10% to about 80% by weight of said lubricating member of a lipophilic structurant or mixture thereof, ii) from about 0.1% to about 60% by weight of a silicone polyether block copolymer of said lubricating member, 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 10% to about 70% by weight of a liquid phase of said lubricating member; iv) wherein said silicone polyether block copolymer is free of any additional alkyl chains; v) wherein said lubricating member is substantially free of soap, and vi) wherein each lubricating member is formed by mixing said lipophilic structurant, said silicone polyether block copolymer, and said liquid phase.
-
Specification