METHOD OF DEPOSITING PARTICULATE BENEFIT AGENTS ON KERATIN-CONTAINING SUBSTRATES
This invention relates to the deposition of particulate benefit agents onto keratin-containing substrates such that the deposited particulates are resistant to removal by exposure to surfactants or cleansing agents. The deposition is accomplished by sequentially treating the substrate with a cationic composition followed by treatment with an anionic particulate benefit agent.
1 . A method for imparting a particulate benefit agent to a keratin-containing substrate comprising the following steps sequentially:
a) providing a first cosmetic composition comprising at least one cationic compound selected from the group consisting of cationic proteins, cationic peptides, cationic polymers, and the mixtures thereof;
b) applying said first cosmetic composition to the keratin-containing substrate for a time period sufficient for at least one said cationic compound to be deposited on the substrate and form a layer;
c) providing a second cosmetic composition comprising at least one anionic pigment; and
d) applying said second cosmetic composition to the keratin-containing substrate for a time period sufficient for at least one said anionic pigment to be deposited on said layer.
2 . A method according to claim 1 , wherein said cationic compound is a cationic protein.
3 . A method according to claim 2 , wherein said cationic protein is selected from the group consisting of lysozyme, avidin, antimicrobial Proteins, RNA or DNA binding proteins, proteases, methylated collagen, Cytochrome C, proteins involved in the aging process, Platelet Factor 4, protamine sulfate and mixtures thereof.
4 . A method according to claim 3 wherein said antimicrobial proteins are selected from the group consisting of: magainin, defensins, cathelicidin and mixtures thereof.
5 . A method according to claim 3 wherein said RNA or DNA binding proteins are selected from the group consisting of histones, ribonuclease A, Deoxyribonuclease and mixtures thereof.
6 . A method according to claim 3 wherein said proteases are selected from the group consisting of Trypsin, Chymotrypsin, Papain, Caspase and mixtures thereof.
7 . A method according to claim 3 wherein said protein involved in the aging process is +Telomerase.
8 . A method according to claim 1 , wherein said cationic compound is a cationic peptide.
9 . A method according to claim 8 , wherein said cationic peptide is selected from the group consisting of polylysine, polyarginine, polyhistidine, copolymers and peptides containing a greater number of basic amino acids than acidic amino acids, and the mixtures thereof.
10 . A method according to claim 1 , wherein said cationic compound is a cationic polymer.
11 . A method according to claim 10 , wherein said cationic polymer is a naturally-occurring cationic polymer selected from the group consisting of chitosan, polyquaternium-4, polyquaternium-10, polyquaternium-24, polyquaternium-67, and the modifications thereof.
12 . A method according to claim 10 , wherein said cationic polymer is a synthetic cationic polymer selected from the group consisting of synthetic cationic polymers comprising one or more primary amines, synthetic cationic polymers comprising one or more secondary amines, synthetic cationic polymers comprising one or more tertiary amines, synthetic cationic polymers comprising one or more quaternary amines, and the mixtures thereof.
13 . A method of according to claim 12 , wherein said synthetic cationic polymer is selected from the group consisting of poly methacrylamidopropyltrimethylammonium chloride, polyquaternium-1, polyquaternium-2, polyquaternium-5, polyquaternium-6, polyquatenium-7, polyquaternium-8, polyquaternium-11, polyquaternium-16, polyquaternium-17, polyquaternium-18, polyquaternium-22, polyquaternium-27, polyquaternium-28, polyquaternium 31, polyquaternium-39, polyquaternium-43, polyquaternium-44, polyquaternium-46, polyquaaternium-47, polyquaternium-53, polyquaternium-55, PVP/dimethylaminoethyl methacrylate copolymer, VP/dimethylaminoethyl methacrylate copolymer, VP/DMAPA acrylate copolymer, VP/vinyl caprolactam/DMAPA acrylates copolymer, vinylcaprolactam/PVP/dimethylaminoethylmethacrylate copolymer, and the mixtures thereof.
14 . A method according to claim 1 , wherein said anionic pigment is selected from the group consisting of titanium oxides, zinc oxides, aluminum oxides, iron oxides, manganese oxides, silicon oxides, silicates, cerium oxide, zirconium oxides, barium sulfate and mixtures thereof.
15 . A method according to claim 1 , wherein said anionic pigment is an anionic microparticle.
16 . A method according to claim 15 , wherein said anionic microparticle has a diameter of from about 1 to about 1000 micrometers.
17 . A method according to claim 1 , wherein said anionic pigment is an anionic nanoparticle.
18 . A method according to claim 17 , wherein said anionic nanoparticle has a diameter of from about 1 to about 1000 nanometers.
19 . A method according to claim 1 , wherein said keratin-containing substrate is selected from the group consisting of hair, skin, nails, teeth, tissues, wool and fur.
20 . A method according to claim 1 , wherein said cationic compound has an Isoelectric Point of from about 8 to about 12.
21 . A method according to claim 1 , wherein said anionic pigment has an Isoelectric Point of from about 7 to about 2.
22 . A method according to claim 1 wherein the zeta potential of the anionic pigment is sufficient to maintain said composition as a stable dispersion.
23 . A method according to claim 22 wherein the zeta potential of the anionic pigment is less than about −20 mV.
24 . A method according to claim 1 , wherein said cationic compound has a concentration of from about 0.000001% to about 10% by weight.
25 . A method according to claim 24 , wherein said cationic compound has a concentration of from about 0.001% to about 5% by weight.
26 . A method of claim according to claim 25 , wherein said cationic compound has a concentration of from about 0.01% to about 2% by weight.
27 . A method according to claim 1 , wherein said anionic pigment has a concentration of from about 0.05% to about 10% by weight.
28 . A method according to claim 27 , wherein said anionic pigment has a concentration of from about 0.1% to about 5% by weight.
29 . A method of claim according to claim 28 , wherein said anionic pigment has a concentration of from about 0.5% to about 2% by weight.
30 . A cosmetic kit for coloring a keratin-containing substrate comprising:
a) a first container containing a first cosmetic composition comprising at least one cationic compound selected from the group consisting of cationic proteins, cationic peptides, cationic polymers, and the mixtures thereof;
wherein said first composition is applied to the keratin-containing substrate for a time period sufficient for at least one said cationic compound to be deposited on the substrate and form a layer, and rinsed off with water;
b) a second container containing a second cosmetic composition comprising at least one anionic pigment;
wherein said second cosmetic composition is applied to the keratin-containing substrate for a time period sufficient for at least one said anionic pigment to be deposited on said layer, and raised off with water.
31 . A colored keratin-containing substrate prepared by the method of claim 1 .