Epilatory Compositions

Abstract

The present invention provides an epilatory composition comprising an admixture of a hydrocarbon resin material and a mineral oil in weight ratio of 1.3:1 to 2.8:1, particulate silica, and, a polyethylene in the form of a homopolymer. An advantage of the compositions of the present invention is that they are able to provide good grip to the hair to be removed and so provide for effective hair removal properties.

Claims

1. An epilatory composition comprising: a hydrocarbon resin; a mineral oil in a weight ratio in the range of from 1.3:1 to 2.8:1; particulate silica; and a polyethylene in the form of a homopolymer.

2. The epilatory composition as claimed in claim 1, wherein the ratio of hydrocarbon resin to mineral oil is in the range of from 1.5:1 to 2.3:1.

3. The epilatory composition as claimed in claim 1, wherein the ratio of hydrocarbon resin to mineral oil is in the range of from 1.9:1 to 2.2:1.

4. The epilatory composition as claimed in claim 1, wherein the ratio of hydrocarbon resin to mineral oil is in the range of from 1.9:1 to 1.95:1.

5. The epilatory composition as claimed in claim 1, wherein the hydrocarbon resin is selected from the group consisting of poly(methylstyrene-co-indene), hydrogenated polycyclopentadiene resin, C.sub.5-C.sub.9 partially or fully hydrogenated hydrocarbon resin, and hydrogenated styrene/methyl styrene/indene copolymer.

6. The epilatory composition as claimed in claim 1, wherein the hydrocarbon resin is hydrogenated styrene/methyl styrene/indene copolymer.

7. The epilatory composition as claimed in claim 1, wherein the epilatory composition comprises from 55-70% wt/wt of hydrocarbon resin.

8. The epilatory composition as claimed in claim 1, wherein the epilatory composition comprises from 63-68% wt/wt of hydrocarbon resin.

9. The epilatory composition as claimed in claim 1, wherein the epilatory composition comprises from 64-66% wt/wt of hydrocarbon resin.

10. The epilatory composition as claimed in claim 1, wherein the polyethylene has a molecular weight in the range of from 100 to 1000 unified mass units.

11. The epilatory composition as claimed in claim 1, wherein the polyethylene has a molecular weight in the range of from 250 to 800 unified mass units.

12. The epilatory composition as claimed in claim 1, wherein the polyethylene has a molecular weight in the range of from 300 to 600 unified mass units.

13. The epilatory composition as claimed in claim 1, wherein the polyethylene is present in an amount in the range of from 0.1% to 5% by weight of the epilatory composition.

14. The epilatory composition as claimed in claim 1, wherein the polyethylene is present in an amount in the range of from 0.5% to 3.0% by weight of the epilatory composition.

15. The epilatory composition as claimed in claim 1, wherein the polyethylene is present in an amount in the range of from 0.75% to 1.5% by weight of the epilatory composition.

16. The epilatory composition as claimed in claim 1, wherein the ratio of particulate silica to polyethylene is in the range of from 16:1 to 2:3.

17. The epilatory composition as claimed in claim 1, wherein the ratio of particulate silica to polyethylene is in the range of from 6:1 to 6:5.

18. The epilatory composition as claimed in claim 1, wherein the ratio of particulate silica to polyethylene is 2:1.

19. The epilatory composition as claimed in claim 1, wherein particulate silica is present in an amount of substantially about 2.0% by weight of the epilatory composition.

20. (canceled)

21. An epilatory composition comprising: 64-66 wt % of a hydrogenated styrene/methyl styrene/indene copolymer; 31-33 wt % of a mineral oil; 1-2 wt % of a particulate silica; and 0.8-1.2 wt % of a polyethylene in the form of a linear homopolymer; wherein the ratio of hydrogenated styrene/methyl styrene/indene copolymer to mineral oil is in the range of from 1.9:1 to 1.95:1.

22. (canceled)

23. An epilatory composition consisting essentially of: 60-68.5 wt % of a hydrogenated styrene/methyl styrene/indene copolymer; 30-38.5 wt % of a mineral oil; 1-2 wt % of a particulate silica; and 0.5-1.5 wt % of a polyethylene in the form of a linear homopolymer.

24.-25. (canceled)

26. The epilatory composition as claimed in claim 1 further comprising: shea butter; and a fragrance; wherein the hydrocarbon resin comprises hydrogenated styrene/methyl styrene/indene copolymer; wherein the mineral oil comprises paraffin oil; wherein the polyethylene in the form of a linear homopolymer; and wherein the epilatory composition comprises: 64-66% of the hydrogenated styrene/methyl styrene/indene copolymer; 31-33% of the paraffin oil; 1-2% of the particulate silica; and 0.5-1.5 wt % of the polyethylene in the form of the linear homopolymer.

Description

[0079] The invention will now be further described, by way of example with reference to the accompanying FIGURE which illustrates fibre removal speeds of compositions of the present application.

EXAMPLE 1

[0080]

TABLE-US-00001 Standard Name Function Percentage Petroleum Hydrocarbon Resin Epilatory Agent 64.5116 White Mineral Oil Solvent 31.7744 Fumed Silica Rheology Modifier 2.0000 Polyethylene Rheology Modifier 1.0000 Shea Butter Cosmetic Active 0.1000 Fragrance Fragrance 0.6140 Total 100.00

[0081] The formulation can be made in the following way:

[0082] The mineral oil is heated to about 100 C. at which point the resin is added slowly with stirring to form a uniform mixture. Polyethylene is then added with stirring until a homogeneous mixture is formed. Silica is added and stirred until homogenous. Shea butter and premix are then added and the resulting mixture is left to cool for 24 hours. At that time the wax is heated until free flowing and subsequently homogenized.

[0083] FIG. 1 illustrates a graph that plots the fibre removal speed of an example composition of the present invention (R1100) and an example composition of the prior art (benchmark).

[0084] As can be seen the required removal speed for the example of the present application is significantly slower than that of the prior art. From this it can be concluded that the compositions of the present application have improved grip over the prior art.

[0085] An advantage of the present invention is that there is provided an epilatory composition having improved grip of a user's hair such that the composition having a more efficacious mode of action.

[0086] A further advantage of the compositions of the present invention is that as a result of their improved grip/adherence the compositions can be used more quickly than those compositions which have poorer grip/adherence thus requiring a longer period of time to become effective.

[0087] Further modifications and improvements can be made without departing from the scope of the invention described herein.