Low-irritating, clear cleansing compositions with relatively low pH
View Patent ↗The methods and compositions of this invention relate to compositions having low irritation characteristics in combination with one or more additional characteristics, for example, relatively high clarity, relatively high foaming, and/or combinations thereof, as well as methods of making and using such compositions. These compositions have low pH values and are useful in cleansing the skin.
1. A skin cleansing composition comprising:
(a) a low molecular weight, non-crosslinked, linear acrylic copolymer derived from at least one first monomeric component selected from the group consisting of (meth)acrylic acid and at least one second monomeric component selected from the group consisting of one or more C 1 to C 9 alkyl (meth)acrylates, wherein the low molecular weight copolymer has a number average molecular weight of about 100,000 or less; and
(b) at least one non-ethoxylated anionic surfactant comprising more than about 2 weight percent of the skin cleansing composition;
wherein the total surfactant load of said skin cleansing composition is not greater than about 9 weight percent of the skin cleansing composition; the pH of said skin cleansing composition is about 6.2 or less; and the skin cleansing composition has a count of 70 kcts/s or less in a light scattering test.
2. A skin cleansing composition according to claim 1 wherein said total surfactant load of said skin cleansing composition is not greater than about 7 weight percent of the skin cleansing composition.
3. A skin cleansing composition according to claim 1 wherein the transmittance of said skin cleansing composition is greater than about 90%.
4. A skin cleansing composition according to claim 1 wherein the pH of said skin cleansing composition is between about 4 and about 6.2.
5. A skin cleansing composition according to claim 1 wherein said skin cleansing composition contains no more than about 5 weight percent of ethoxylated surfactant.
6. A skin cleansing composition according to claim 1 wherein said composition has a count of 50 kcts/s or less.
7. A skin cleansing composition according to claim 6 wherein said composition has a count of 40 kcts/s or less.
8. A skin cleansing composition according to claim 5 wherein said composition contains no more than about 1 weight percent of ethoxylated surfactant.
9. A skin cleansing composition according to claim 1 wherein said low molecular weight, non-cross-linked, linear acrylic copolymer comprises a copolymer containing a first monomeric component selected from the group consisting of one or more α,β-ethylenically unsaturated monomers containing at least one carboxylic acid group; and a second, hydrophobically modified monomeric component selected from the group consisting of one or more α,β-ethylenically unsaturated non-acid monomers containing a C 1 to C 9 alkyl group, including linear and branched C 1 to C 9 alkyl esters of (meth)acrylic acid, vinyl esters of linear and branched C 1 to C 10 carboxylic acids and mixtures thereof.
10. A skin cleansing composition comprising:
(a) a low molecular weight, non-crosslinked, linear acrylic copolymer derived from at least one first monomeric component selected from the group consisting of (meth)acrylic acid and at least one second monomeric component selected from the group consisting of one or more C 1 to C 9 alkyl (meth)acrylates, wherein the low molecular weight copolymer has a number average molecular weight of about 100,000 or less; and
(b) at least one non-ethoxylated anionic surfactant comprising more than about 2 weight percent of the skin care composition;
(c) wherein the total surfactant load of said skin cleansing composition is not greater than about 9 weight percent of the skin cleansing composition; the pH of said skin cleansing composition is about 6.2 or less; and the transmittance of said skin cleansing composition is greater than about 90%.
11. A skin cleansing composition comprising:
(a) a low molecular weight, non-crosslinked, linear acrylic copolymer derived from at least one first monomeric component selected from the group consisting of (meth)acrylic acid and at least one second monomeric component selected from the group consisting of one or more C 1 to C 9 alkyl (meth)acrylates, wherein the low molecular weight copolymer has a number average molecular weight of about 100,000 or less; and
(b) at least one non-ethoxylated anionic surfactant comprising more than about 2 weight percent of the skin cleansing composition;
wherein the total surfactant load of said skin cleansing composition is not greater than about 7 weight percent of the skin cleansing composition; the pH of said skin cleansing composition is about 6.2 or less; and the skin cleansing composition has a count of 70 kcts/s or less in a light scattering test.