Skin cleansing formulation
A skin cleansing formulation is provided, comprising: a dermatologically acceptable vehicle; a dermatologically acceptable oil; and a deposition aid polymer, wherein the deposition aid polymer is a cationic dextran polymer, comprising a dextran polymer functionalized with quaternary ammonium groups; wherein the deposition aid polymer enhances the deposition of the dermatologically acceptable oil from the skin cleansing formulation onto mammalian skin.
1. A skin cleansing formulation, comprising:
a dermatologically acceptable personal care cleaning surfactant;
40 to 90 wt %, based on weight of the skin cleansing formulation, of a dermatologically acceptable vehicle;
2.5 to 15 wt %, based on weight of the skin cleansing formulation, of a dermatologically acceptable oil, wherein the dermatologically acceptable oil is selected from the group consisting of hydrocarbon oils, natural oils, fragrance oils and mixtures thereof; and
0.2 to 1 wt %, based on weight of the skin cleansing formulation, of a deposition aid polymer, wherein the deposition aid polymer is a cationic dextran polymer, comprising a dextran polymer functionalized with quaternary ammonium groups, wherein the dextran polymer is a branched chain dextran polymer;
wherein the skin cleansing formulation comprises less than 0.0001 wt %, based on weight of the skin cleansing formulation, of silicone;
wherein the deposition aid polymer enhances the deposition of the dermatologically acceptable oil from the skin cleansing formulation onto mammalian skin.
2. The skin cleansing formulation of claim 1 , wherein the cationic dextran polymer has a Kjeldahl nitrogen content corrected for ash and volatiles, TKN, of 1.0 to 4.0 wt %.
3. The skin cleansing formulation of claim 2 , wherein the quaternary ammonium groups are selected from the group consisting of trialkyl ammonium moieties of formula (B) bound to the dextran polymer
wherein
is the dextran polymer with a pendant oxygen; wherein X is a divalent linking group bonding the trialkyl ammonium moieties to pendent oxygen on the dextran polymer;
wherein each R 2 is independently selected from the group consisting of a C 1-7 alkyl group; and
wherein R 3 is selected from the group consisting of a C 1-22 alkyl group.
4. The skin cleansing formulation of claim 3 , wherein X is a —CH 2 CH(OR 4 )CH 2 — group; wherein R 4 is selected from the group consisting of a hydrogen and a C 1-4 alkyl group.
5. The skin cleansing formulation of claim 4 , wherein each R 5 is a methyl group.
6. The skin cleansing formulation of claim 5 , wherein the dermatologically acceptable personal care cleaning surfactant comprises a mixture of sodium laureth sulfate (SLES) and cocamidopropyl betaine; and wherein the dermatologically acceptable oil is a natural oil selected from the group consisting of caprylic and capric triglyceride, sunflower oil, soybean oil and coconut oil.
7. A method of making a skin cleansing formulation, comprising:
(a) providing a dermatologically acceptable vehicle;
(b) providing a dermatologically acceptable oil, wherein the dermatologically acceptable oil is selected from the group consisting of hydrocarbon oils, natural oils, fragrance oils and mixtures thereof;
(c) selecting a cationic dextran polymer to be a deposition aid for enhancing deposition of the dermatologically acceptable oil onto mammalian skin; wherein the cationic dextran polymer comprises a dextran polymer functionalized with quaternary ammonium groups;
wherein the dextran polymer is a branched chain dextran polymer; and
(d) combining the dermatologically acceptable vehicle, the dermatologically acceptable oil and the cationic dextran polymer to form a skin cleansing formulation;
wherein the skin cleansing formulation comprises less than 0.0001 wt %, based on weight of the skin cleansing formulation, of silicone.
8. A method of depositing a dermatologically acceptable oil onto mammalian skin, comprising:
providing a skin cleansing formulation according to claim 1 ; and
applying the skin cleansing formulation to the skin of a mammal.
9. The skin cleansing formulation of claim 1 , wherein the silicone is selected from the group consisting of dimethylpolysiloxane, methylphenyl polysiloxane, polyether denaturation silicone oil and polyamino modifying silicone oil.
10. The skin cleansing formulation of claim 6 , wherein the natural oil is sunflower oil.
11. The skin cleaning formulation of claim 10 , wherein the silicone is selected from the group consisting of dimethylpolysiloxane, methylphenyl polysiloxane, polyether denaturation silicone oil and polyamino modifying silicone oil.
12. The method of claim 7 , wherein the silicone is selected from the group consisting of dimethylpolysiloxane, methylphenyl polysiloxane, polyether denaturation silicone oil and polyamino modifying silicone oil.
13. The method of claim 8 , wherein the silicone is selected from the group consisting of dimethylpolysiloxane, methylphenyl polysiloxane, polyether denaturation silicone oil and polyamino modifying silicone oil.