Skin Engaging Shaving Aid Comprising A Thermally Resilient Sensate And A TRPA1 Receptor Inhibitor

1 . A skin engaging shaving aid member, said skin engaging shaving aid member comprising:

a. a matrix comprising at least one of: a water soluble polymer, an emollient, a soap base, and a mixture thereof;

b. a thermally resilient sensate comprising a N-substituted menthanecarboxamide having the formula:

in which m is 0 or 1, Y and Z are selected independently from the group consisting of H. OH, C1-C4 straight or branched alkyl, or, a C1-C4 straight or branched alkoxy, X is (CH2)n-R, where n is 0 or 1 and R is a group with non-bonding electrons, with the provisos that: (a) when Y and Z are H. X is not F, OH, MeO or NO2 in the 4-position and is not OH in the 2 or 6-position, and (b) when Y or Z is H then X, Y and Z are such that (i) the groups in the 3- and 4-positions are not both OMe, (ii) the groups in the 4- and 5-positions are not both OMe, (iii) the groups in 3- and 5-positions are not OMe if the group in the 4-position is OH, and (iv) the groups in the 3- and 5-positions are not OH if the group in the 4-position is methyl; and

from about 0.1% to about 2% of a TRPA1 receptor inhibitor.

2 . The skin engaging shaving aid member of claim 1 , wherein X is in the 4-position, preferably wherein X is in the 4-position and Y and Z are H, OH, Me or OMe.

3 . The skin engaging shaving aid member of claim 1 , wherein the group with non-bonding electrons is selected from halogens, OH, OMe, NO2, CN, Ac, SO2NH2, CHO, CO2H and C1-C4 alkyl carboxylates.

4 . The skin engaging shaving aid member of claim 1 , wherein said thermally resilient sensate comprises N-[4-(cyanomethyl)phenyl]-(1R,2S,5R)-2-isopropyl-5-methylcyclohexanecarboxamide of formula:

5 . The skin engaging shaving aid member of claim 1 , wherein the level of thermally resilient sensate is from 0.01% to 25%.

6 . The skin engaging shaving aid member of claim 1 , wherein said level is TRPA1 receptor inhibitor is at from about 0.5% to about 1.75%.

7 . The skin engaging shaving aid member of claim 1 , wherein said level is TRPA1 receptor inhibitor is at from about 0.75% to about 1.5%.

8 . The skin engaging shaving aid member of claim 1 , wherein said level is TRPA1 receptor inhibitor is at from about 1% to about 1.25%.

9 . The skin engaging shaving aid member of claim 1 , wherein said TRPA1 receptor inhibitor is selected from the group consisting of: cinnamon bark oil; γ-Dodecalactone; vanillic acid; γ-Methyl Decalactone; trans, trans-2,4-Nonadienal; 4-Allyl-2,6-dimethoxyphenol; o-Methoxycinnamaldehyde; 4-Methyl-2-phenyl-2 Pentenal (mix of cis and trans); 2-Methoxy-4-propyl-phenol; Methyl 2-methoxy-benzoate; δ-Tetradecalactone; 1-Methyl-2-pyrole carboxaldehyde; 3,3,5-Trimethylcyclohexanol; N-(2-Hydroxyethyl)lactamide; 2-(3-Phenylpropyl)tetrahydrofuran; Anisyl Butyrate; Methyl-4-phenyl butyrate; 3-Heptyldihydro-5-methyl-2(3H)-furanone; 3-acetylsulfanylhexyl acetate; 3-methyl-5-propyl-2-Cyclohexen-1-one; Isobornyl Isobutyrate; Bornyl Valerate; Citronellyl acetate; (2S,5S,6S)-6-) Hydroxy-dihydrotheaspirane; trans-2-Hexenal; methyl naphthalenyl ketone, or derivatives thereof; and mixtures thereof.

10 . The skin engaging shaving aid member of claim 1 , further comprising an additional cooling agent selected from the group consisting of: L-menthol; p-menthane-3,8-diol; Isopulegol; Menthoxypropane-1,2,-diol; Curcumin; Menthyl Lactate (such as Frescolat ML by Symrise); Gingerol; Icilin; Tea Tree Oil; Methyl Salicylate; Camphor; Peppermint Oil; N-Ethyl-p-menthane-3-carboxamide; Ethyl 3-(p-menthane-3-carboxamido)acetate; 2-Isopropyl-N,2,3-trimethylbutyramide; Menthone glycerol ketal, Menthone Glyerine Acetal; Coolact 10; and mixtures thereof, preferably wherein said optional cooling agent is a mixture of menthol and menthyl lactate, more preferably wherein the mixture of menthol and menthyl lactate is in a ratio of from 1:4 to 4:1 by weight.

11 . The skin engaging shaving aid member of claim 1 , wherein said matrix comprises a water soluble polymer.

12 . The skin engaging 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, preferably water soluble polymer is present at a level of from 50% to 100% by weight of said matrix.

13 . The skin engaging shaving aid member of claim 1 , wherein said matrix further comprises a water insoluble polymer.

14 . The skin engaging shaving aid member of claim 13 , wherein said 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.

15 . The skin engaging shaving aid member claim 13 , wherein said water insoluble polymer is present at a level of from 5% to 40%, preferably from 15% to 35% by weight of skin engaging shaving aid member.

16 . The skin engaging shaving aid member claim 1 , wherein said matrix further comprises a block polymer selected from the group consisting of: a di-block copolymer, a tri-block copolymer, a multi-block copolymer, a radial block copolymer, a random block copolymer, and mixtures thereof.

17 . A hair removal device comprising:

a. a cartridge;

b. one or more elongated edges positioned on said cartridge; and

c. the skin engaging shaving aid member of claim 1 positioned on said cartridge, wherein said TRPA1 receptor inhibitor comprises at least one of methyl naphthalenyl ketone, a derivative thereof; and mixtures thereof.

18 . A method of making a skin engaging shaving aid member comprising the steps of:

a. providing a matrix comprising:

i. at least one of: a water soluble polymer, an emollient, a soap base, and a mixture thereof, and

ii. a thermally resilient sensate having the formula:

in which m is 0 or 1, Y and Z are selected independently from the group consisting of H. OH, C1-C4 straight or branched alkyl, or, a C1-C4 straight or branched alkoxy, X is (CH2)n-R, where n is 0 or 1 and R is a group with non-bonding electrons, with the provisos that: (a) when Y and Z are H. X is not F, OH, MeO or NO2 in the 4-position and is not OH in the 2 or 6-position, and (b) when Y or Z is H then X, Y and Z are such that (i) the groups in the 3- and 4-positions are not both OMe, (ii) the groups in the 4- and 5-positions are not both OMe, (iii) the groups in 3- and 5-positions are not OMe if the group in the 4-position is OH, and (iv) the groups in the 3- and 5-positions are not OH if the group in the 4-position is methyl, and a TRPA1 receptor inhibitor, to form a feed;

b. preferably heating said feed to a temperature of from 120° C. to 200° C., and

c. forming a skin engaging shaving aid member from said feed.

19 . The method of claim 18 , wherein said step of forming is selected from the group consisting of: extruding said feed into said skin engaging shaving aid member; molding said feed said feed into said skin engaging shaving aid member; injection molding said feed into said skin engaging shaving aid member; and a combination thereof.

20 . The method of claim 18 , wherein said TRPA1 receptor inhibitor is selected from the group consisting of: cinnamon bark oil; γ-Dodecalactone; vanillic acid; γ-Methyl Decalactone; trans, trans-2,4-Nonadienal; 4-Allyl-2,6-dimethoxyphenol; o-Methoxycinnamaldehyde; 4-Methyl-2-phenyl-2 Pentenal (mix of cis and trans); 2-Methoxy-4-propyl-phenol; Methyl 2-methoxy-benzoate; δ-Tetradecalactone; 1-Methyl-2-pyrole carboxaldehyde; 3,3,5-Trimethylcyclohexanol; N-(2-Hydroxyethyl) lactamide; 2-(3-Phenylpropyl)tetrahydrofuran; Anisyl Butyrate; Methyl-4-phenyl butyrate; 3-Heptyldihydro-5-methyl-2(3H)-furanone; 3-acetylsulfanylhexyl acetate; 3-methyl-5-propyl-2-Cyclohexen-1-one; Isobornyl Isobutyrate; Bornyl Valerate; Citronellyl acetate; (2S,5S,6S)-6-) Hydroxy-dihydrotheaspirane; trans-2-Hexenal; methyl naphthalenyl ketone, or derivatives thereof; and mixtures thereof.