Color-stable lipstick containing sweeteners

Abstract

A cosmetic lipstick containing a) sodium saccharin (INCI) and b) citric acid (INCI).

Description

Technical Field

[0001] The present invention relates to a cosmetic lipstick containing a combination of sodium saccharin (INCI: Sodium Saccharin) and citric acid (INCI: Citric Acid).

[0002] The desire to look beautiful and attractive has been deeply rooted in humans for thousands of years. Although aesthetic ideals have changed over the course of time, a pleasing appearance, which enhances one's self-esteem and attractiveness to others, has always been the goal of humans, with the pursuit of a flawless appearance being without reproach.

[0003] The term "decorative cosmetics" is derived from the Latin "decoratio", which means the enhancement of beauty. Here, in many cases, dyes are used to make individual body parts stand out, particularly on the face, and color inhomogeneities are smoothed out.

[0004] In this context, in addition to face powder as a powdery cosmetic and rouge as a stick-shaped preparation, creamy formulations such as emulsion-based day creams and cream makeups are used.

[0005] Among the decorative cosmetics often used is lipstick. More than 50% of German women use lipstick. In many cases, lipstick not only emphasizes the color of the lips but also serves the role of lip care.

[0006] Lipstick usually consists of a wax matrix incorporating high concentrations of liquid and semi-solid oils as well as pigments and fillers. Lipstick exists in the form of a solid stick.

[0007] In the case of lipstick, there is a particularly high requirement regarding health non-toxicity, as it is impossible to prevent some of the preparation from coming into contact with the mouth and / or being swallowed during application and wear. Since the individual contents of lipstick have an unpleasant, distinctive taste, it is even more important to mask this distinctive taste in order to make lipstick more appealing to consumers. For this purpose, sweeteners are often used. Potentially usable sweeteners would basically include sodium saccharin (INCI) and / or neohesperidin dihydrochalcone (INCI).

[0008] However, a drawback of conventional technology is that lipsticks containing sodium saccharin tend to yellow ("yellowish"). Preparations containing a combination of sodium saccharin and neohesperidin dihydrochalcone even tend to redden or brown. This phenomenon occurs especially at higher temperatures and longer storage periods. If an (unplanned) time delay occurs during the heating stage of manufacturing, or if the lipstick is stored at higher temperatures (e.g., in summer), this can lead to undesirable discoloration of the product. In some cases, the manufacturing process may require the complete discarding of the preparation, incurring significant costs for disposal.

[0009] Therefore, the object of the present invention was to develop a lipstick formulation containing a sweetener (particularly one containing sodium saccharin and / or neohesperidin dihydrochalcone) that has color stability even at higher temperatures and longer storage periods.

[0010] Lipstick preparations typically contain one or more coloring pigments, as their primary function is to color the lip skin.

[0011] Currently, a drawback of conventional technology is that the combination of sweeteners (especially sodium saccharin and neohesperidin dihydrochalcone) and pigments results in heterogeneous preparations. During manufacturing, it has been observed that in formulations containing sweeteners, the pigment does not uniformly distribute within the high-temperature liquid stick material, but instead precipitates. Thus, it becomes impossible to cast uniformly formed sticks from this liquid material.

[0012] Therefore, the objective of the present invention was to develop a lipstick formulation containing a coloring pigment and a sweetener that can homogeneously incorporate the coloring pigment into the preparation.

[0013] Surprisingly, these challenges are a) Sodium saccharin (INCI) and b) Citric acid (INCI) and This is resolved by a cosmetic lipstick containing the combination of [the specified elements].

[0014] In this case, according to the present invention, it is preferable that the preparation contains water and / or glycerin.

[0015] Surprisingly, these challenges are In a method for manufacturing lipstick for cosmetic purposes, i) First, dissolve sodium saccharin (INCI) in water, ii) Dissolve citric acid (INCI) in water in a separate container. iii) In the second step, combine both aqueous solutions with the fat phase in succession. iv) Mix the combined solution with the remaining contents of the preparation and homogenize it. This can also be solved by a method characterized by the following features.

[0016] Within the scope of this disclosure, phrases such as "according to the present invention" and "advantageous according to the present invention" always refer to the preparations and methods according to the present invention unless otherwise specified.

[0017] Therefore, according to the present invention, an advantageous embodiment of the present invention is characterized in that the lipstick preparation contains sodium saccharin at a concentration of 0.2 to 10% by weight based on the total weight of the preparation.

[0018] In this case, according to the present invention, when sodium saccharin is the only sweetener in the preparation, a concentration of less than 1.5% by weight based on the total weight of the preparation is preferred.

[0019] Furthermore, according to the present invention, it is advantageous that the lipstick preparation contains citric acid at a concentration of at least 0.05% by weight based on the total weight of the preparation.

[0020] Here, according to the present invention, when sodium saccharin is the only sweetener in the preparation, a concentration of at least 0.25% by weight based on the total weight of the preparation is preferred.

[0021] If the preparation contains not only sodium saccharin but also neohesperidin dihydrochalcone and a coloring pigment, according to the present invention, a concentration of citric acid of at least 0.1% by weight based on the total weight of the preparation is preferred.

[0022] In addition to preparations containing sodium saccharin as the sole sweetener, a second embodiment of the present invention is also advantageous, characterized in that the lipstick preparation further contains neohesperidin dihydrochalcone (INCI).

[0023] In such cases, according to the present invention, it is advantageous for the lipstick preparation to further contain neohesperidin dihydrochalcone (INCI) at a concentration of 0.1 to 5% by weight based on the total weight of the preparation.

[0024] In such a case, the method according to the invention is characterized in that in step i) neohesperidin dihydrochalcone is dissolved together with sodium saccharin in a water / glycerin mixture.

[0025] Here, in any case, according to the invention, it is preferred that the water / glycerin mixture contains 25% by weight or less of glycerin based on the water / glycerin mixture.

[0026] According to the invention, an advantageous embodiment of the invention is also characterized in that the lip stick preparation contains one or more dyes selected from the group consisting of CI15850 (Red No. 6, E180, or also called rhodamine B), CI42090 (Blue No. 1, E133, or also called brilliant blue), CI77491 (titanium dioxide, also called E-171), CI77499, and CI77492 (iron oxide, also called E-172).

[0027] In such a case, according to the invention, it is preferred that the lip stick preparation contains the dye at a total concentration of 0.05 to 0.5% by weight based on the total weight of the preparation.

[0028] When the preparation contains CI15850 (Red No. 6, E180, or also called rhodamine B) as the only dye, this compound is advantageously used at a concentration of 0.05 to 0.4% by weight based on the total weight of the preparation according to the invention.

[0029] When the preparation contains a combination of CI15850 and CI42090, according to the invention, the preferred use concentration is 0.05 to 0.4% by weight based on the total weight of the preparation in the case of CI15850 and 0.02 to 0.15% by weight based on the total weight of the preparation in the case of CI42090.

[0030] When the preparation contains CI77491, this compound is advantageously used at a concentration of 0.02 to 0.1% by weight based on the total weight of the preparation according to the invention.

[0031] If the preparation contains CI77499, this compound is advantageously used in a concentration of 0.02 to 0.1% by weight based on the total weight of the preparation, according to the present invention.

[0032] If the preparation contains CI77492, this compound is advantageously used in a concentration of 0.005 to 0.05% by weight based on the total weight of the preparation, according to the present invention.

[0033] In the context of the present invention, it is advantageous for the lipstick preparation to contain castor oil (INCI: Ricinus Communis Seed Oil).

[0034] In the method according to the present invention, preferably, in particular, the coloring pigment is pre-dispersed in the oil before being added to the preparation.

[0035] According to the present invention, it is preferable that the preparation contains castor oil at a concentration of 18 to 25% by weight based on the total weight of the preparation.

[0036] According to the present invention, an advantageous embodiment of the present invention is also characterized in that the lipstick preparation contains shea butter (INCI: Butyrospermum Parkii Butter), sunflower oil (INCI: Helianthus Annuus Hybrid Oil), and / or beeswax (INCI: Cera Alba), sunflower wax (Helianthus Annuus Seed Cera).

[0037] If the preparation contains shea butter (INCI: Butyrospermum Parkii Butter), this compound is advantageously used in a concentration of 2 to 5% by weight based on the total weight of the preparation, according to the present invention.

[0038] If the preparation contains sunflower oil (INCI: Helianthus Annuus Hybrid Oil), this compound is advantageously used in a concentration of 45-55% by weight based on the total weight of the preparation, according to the present invention.

[0039] If the preparation contains sunflower wax (Helianthus Annuus Seed Cera), this compound is advantageously used in a concentration of 7 to 11% by weight based on the total weight of the preparation, according to the present invention.

[0040] Furthermore, according to the present invention, an advantageous lip care product is characterized in that the preparation contains cetyl palmitate, hydrogenated rapeseed oil (INCI), and / or cetearyl alcohol. Herein, according to the present invention, the use of hydrogenated rapeseed oil is preferred.

[0041] In the case of cetyl palmitate, according to the present invention, the advantageous concentration for use is 2 to 10% by weight based on the total weight of the preparation.

[0042] In the case of cetearyl alcohol, according to the present invention, the advantageous concentration for use is 5 to 15% by weight based on the total weight of the preparation.

[0043] In the case of hydrogenated rapeseed oil (INCI), according to the present invention, the advantageous concentration for use is 5 to 9% by weight based on the total weight of the preparation.

[0044] Furthermore, according to the present invention, it may be advantageous for the lip care preparation to contain butylhydroxytoluene (BHT). The concentration of this substance used according to the present invention is 0.05 to 0.15% by weight based on the total weight of the preparation.

[0045] Furthermore, according to the present invention, it is advantageous for the lipstick preparation to contain tocopherol and / or ascorbyl palmitate. Here, the use of tocopherol is particularly preferred. The concentration of this substance used according to the present invention is 0.05 to 0.15% by weight based on the total weight of the preparation.

[0046] According to the present invention, the lipstick formulation may, advantageously, contain one or more UV filters.

[0047] In such cases, according to the present invention, it is preferable that the lipstick preparation contains 4-(tert-butyl)-4'-methoxydibenzoylmethane (INCI: Butyl Methoxydibenzoylmethane) and / or 2,4,6-tris-[anilino-(p-carbo-2'-ethyl-1'-hexyloxy)]-1,3,5-triazine (INCI: Ethylhexyl Triazone).

[0048] In particular, according to the present invention, it is advantageous that the proportion of hydrophilic components in the lipstick preparation is less than 5% by weight based on the total weight of the preparation. Here, hydrophilic components are understood to be water and water-soluble compounds.

[0049] To disperse this component, according to the present invention, it is advantageous to add a polyglyceryl ester such as polyglyceryl-3 diisostearate or (diisostearate / polyhydroxystearate / sebacate) polyglyceryl-4 to the preparation according to the present invention. Here, according to the present invention, the use of (diisostearate / polyhydroxystearate / sebacate) polyglyceryl-4 is preferred.

[0050] Here, the preferred concentration of (diisostearate / polyhydroxystearate / sebacate) polyglyceryl-4 according to the present invention is 1.5 to 2.5% by weight based on the total weight of the preparation.

[0051] In particular, the use of citric acid (INCI) in cosmetic lipsticks or methods as described herein to enhance the color stability and / or emulsification stability of the preparation is in accordance with the present invention.

[0052] Comparative experiment The following formulations were prepared and their appearance was visually assessed. The concentrations used are all related to weight % based on the total weight of the preparation.

[0053] All LAB values ​​listed below were measured using a manufactured lip care stick with a Hunterlab ColorFlex EZ colorimeter. The stick was then slightly rotated and removed from the machine, and placed upside down in front of the measurement opening.

[0054] [Table 1]

[0055] [Table 2]

[0056] [Table 3]

[0057] [Table 4]

[0058] [Table 5]

[0059] [Table 6]

[0060] [Table 7]

[0061] From the Lab values ​​in Examples 16-21, it can be seen that as the concentration of citric acid increases, the a and b values ​​gradually decrease, and therefore a color change to the blue-green range occurs. The resulting color is visually preferable compared to the original color without citric acid.

[0062] [Table 8]

[0063] In Examples 22-23, it can be seen that as the concentration of citric acid increases, the a and b values ​​gradually increase, and therefore a shift in color to a reddish-yellow occurs. Here again, the color obtained after the addition of citric acid is visually preferable.

[0064] Examples The following examples clarify the present invention without limiting it. Unless otherwise specified, all quantity indications, proportions, and percentages are based on the weight and total amount or gross weight of the preparation.

[0065] [Table 9]

Claims

1. a) Sodium saccharin (INCI) and b) Citric acid (INCI) and A cosmetic lipstick containing the following combination.

2. The cosmetic lipstick according to claim 1, characterized in that the preparation contains water and / or glycerin.

3. In a method for manufacturing lipstick for cosmetic purposes, i) First, dissolve sodium saccharin (INCI) in water, ii) Dissolve citric acid (INCI) in water in a separate container. iii) In the second step, combine both aqueous solutions with the fatty phase in succession. iv) Mix the combined solution with the remaining contents of the preparation and homogenize it. A method characterized by the following features.

4. The lipstick preparation according to claim 1 or 2, or the method according to claim 3, characterized in that the lipstick preparation contains sodium saccharin at a concentration of 0.2 to 10% by weight based on the total weight of the preparation.

5. The lipstick or method according to any one of claims 1 to 4, characterized in that the lipstick preparation contains citric acid at a concentration of at least 0.05% by weight based on the total weight of the preparation.

6. The lipstick or method according to any one of claims 1 to 5, characterized in that the lipstick preparation further contains neohesperidin dihydrochalcone (INCI).

7. The lipstick or method according to any one of claims 1 to 6, characterized in that the lipstick preparation further contains neohesperidin dihydrochalcone (INCI) at a concentration of 0.1 to 5% by weight based on the total weight of the preparation.

8. The method according to any one of claims 1 to 7, characterized in that, in step i), neohesperidin dihydrochalcone is dissolved together with sodium saccharin in a water / glycerin mixture.

9. The method according to claim 8, characterized in that the water / glycerin mixture contains 25% by weight or less of glycerin based on the water / glycerin mixture.

10. The lipstick or method according to any one of claims 1 to 9, characterized in that the lipstick preparation contains one or more dyes selected from the group consisting of CI 15850 (also known as Red No. 6, E180, or Lythol Rubin), CI 42090 (also known as Blue No. 1, E133, or Brilliant Blue), CI 77491 (also known as Titanium Dioxide, E-171), CI 77499, and CI 77492 (also known as Iron Oxide, E-172).

11. The lipstick or method according to claim 10, characterized in that the lipstick preparation contains the dye at a total concentration of 0.05 to 0.5% by weight based on the total weight of the preparation.

12. A lipstick or method according to any one of claims 1 to 11, characterized in that the lipstick preparation contains castor oil (INCI: Ricinus Communis Seed Oil).

13. A lipstick or method according to any one of claims 1 to 12, characterized in that the lipstick preparation contains shea butter (INCI: Butyrospermum Parkii Butter), sunflower oil (INCI: Helianthus Annuus Hybrid Oil), and / or beeswax (INCI: Cera Alba), sunflower wax (Helianthus Annuus Seed Cera).

14. The lipstick or method according to any one of claims 1 to 13, characterized in that the lipstick preparation contains tocopherol and / or ascorbyl palmitate.

15. The lipstick or method according to any one of claims 1 to 14, characterized in that the lipstick preparation contains 4-(tert-butyl)-4'-methoxydibenzoylmethane (INCI: Butyl Methoxydibenzoylmethane) and / or 2,4,6-tris-[anilino-(p-carbo-2'-ethyl-1'-hexyloxy)]-1,3,5-triazine (INCI: Ethylhexyl Triazone).

16. The lipstick or method according to any one of claims 1 to 15, characterized in that the lipstick preparation contains less than 5% by weight of a hydrophilic component based on the total weight of the preparation.

17. The lipstick or method according to any one of claims 1 to 16, characterized in that the lipstick preparation contains polyglyceryl-3 diisostearate or polyglyceryl-4 (diisostearate / polyhydroxystearate / sebacate).

18. Use of citric acid (INCI) in a cosmetic lipstick or method according to any one of claims 1 to 17 to enhance the color stability and / or emulsification stability of the preparation.

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