Lubricating shaving aid member
View Patent ↗A shaving aid member comprising a lubricating material, the lubricating material comprising a water soluble polymer having an average molecular weight of at least 5,000, and a copolymer of polyethylene oxide and polypropylene oxide.
1. A shaving aid member comprising a lubricating material, the lubricating material comprising:
a. about 50% or more, by weight of the lubricating material, of a water soluble polymer having an average molecular weight of from about 100,000 to about 6,000,000, wherein said water soluble polymer comprises
i. a first polyethylene oxide having an average molecular weight of 300,000 in an amount of 29% to 32%, by weight of the lubricating material, and
ii. a second polyethylene oxide having an average molecular weight of 5,000,000 in an amount of from 19% to 22%, by weight of the lubricating material; and
b. from about 5% to about 10%, by weight of the lubricating material, of a copolymer of polyethylene oxide and polypropylene oxide, wherein the copolymer of polyethylene oxide and polypropylene oxide has an average molecular weight of from 12,000 to 13,000.
2. The shaving aid member of claim 1 , wherein the copolymer of polyethylene oxide and polypropylene oxide is a block copolymer.
3. The shaving aid member of claim 1 , wherein the ratio of polyethylene oxide to polypropylene oxide in the copolymer of polyethylene oxide and polypropylene oxide is in the range of from about 10:1 to about 1:10.
4. The shaving aid member of claim 1 , wherein the water soluble polymer is selected from polyethylene oxide, polyvinyl pyrrolidone, polyacrylamide, polyhydroxymethacrylate, polyvinyl imidazoline, polyethylene glycol, polyvinyl alcohol, polyhydroxyethymethacrylate, silicone polymers, and mixtures thereof.
5. The shaving aid member of claim 1 , wherein the water soluble polymer is polyethylene oxide.
6. The shaving aid member of claim 1 , wherein the water soluble polymer has an average molecular weight from about 300,000 to about 5 million.
7. The shaving aid member of claim 1 , wherein the water soluble polymer is present at a level from about 70% to about 90% by weight of the lubricating material.
8. The shaving aid member of claim 1 , wherein the shaving aid member further comprises a water insoluble polymer, and wherein the lubricating material is dispersed within the water insoluble polymer.
9. The shaving aid member of claim 8 , wherein the water insoluble polymer is selected from: polyethylene, polypropylene, polystyrene, high impact polystyrene, butadiene styrene copolymer, polyacetal, acrylonitrile-butadiene styrene copolymer, ethylene vinyl acetate copolymer, and mixtures thereof.
10. The shaving aid member of claim 8 , wherein the water insoluble polymer is present at a level of from about 15% to about 35% by weight of the shaving aid member.