Colour-stable lipistick with sweetener

Abstract

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

Description

[0001] Description

[0002] Color-stable lipstick with sweetener

[0003] The present invention relates to a cosmetic lipstick containing a combination of sodium saccharin (INCI: Sodium Saccharin) and citric acid (INCI: Citric Acid).

[0004] The desire to look beautiful and attractive has been ingrained in humankind for thousands of years. Although the ideal of beauty has changed over time, the pursuit of a flawless appearance has always been a goal for humans, as a likeable appearance increases their self-esteem and their attraction to others.

[0005] The term decorative cosmetics derives from the Latin "decoratio" - "to highlight what is beautiful." Typically, colorants are used to highlight specific parts of the body, especially the face, and to soften color inconsistencies.

[0006] In addition to face powders and rouge as powdered cosmetics and stick-shaped preparations, cream-like preparations such as day creams and emulsion-based cream make-up are also used.

[0007] Lipstick is one of the most widely used decorative cosmetics. More than 50% of women in Germany wear it. In addition to adding color to the lips, it also typically serves as a lip care product.

[0008] Lipsticks typically consist of a wax matrix into which high concentrations of liquid and semi-solid oils, pigments, and fillers are incorporated. They come in solid stick form.

[0009] Lipsticks are subject to particularly stringent safety requirements, as it cannot be ruled out that parts of the product may come into contact with the mouth and / or be swallowed during application and wear. Since individual ingredients in lipsticks have an unpleasant taste, it is also important to mask this taste to make the lipsticks more attractive to consumers. Sweeteners are often used for this purpose. Potential sweeteners include sodium saccharin (INCI: Sodium Saccharin) and / or neohesperidin dihydrochalcone (INCI: Neohesperidin Dihydrochalcone).

[0010] A disadvantage of the current state of the art, however, is the fact that lipsticks containing sodium saccharin tend to develop a yellow discoloration ("yellow tinge"). Preparations containing a combination of sodium saccharin and neohesperidin dihydrochalcone tend to develop a reddish or even brown discoloration. This effect is particularly evident at higher temperatures and over longer storage periods. If (unplanned) delays occur during production during the warming phase, or if a lipstick is stored at a higher temperature (e.g., in summer), this can lead to undesirable discoloration of the product. During the manufacturing process, the preparation may have to be discarded entirely and disposed of at great expense.

[0011] It was therefore the object of the present invention to develop sweetener-containing lipstick formulations (in particular those with sodium saccharin and / or neohesperidin dihydrochalcone) which are color-stable even at higher temperatures and over longer storage periods.

[0012] Lipstick preparations often contain one or more color pigments, as they are usually used to color the skin of the lips.

[0013] A disadvantage of the state of the art is that the combination of sweetener (especially sodium saccharin and neohesperidin dihydrochalcone) and pigments leads to inhomogeneous formulations. Even during production, it is noticeable that in formulations containing sweeteners, the pigments no longer distribute evenly in the hot, liquid stick mass, but sink to the bottom. As a result, sticks of uniform composition can no longer be cast from this liquid stick mass.

[0014] It was therefore the object of the present invention to develop a lipstick formulation containing color pigments and sweeteners in which the color pigments can be homogeneously incorporated into the preparation.

[0015] Surprisingly, the tasks are solved by a cosmetic lipstick containing a combination of a) sodium saccharin (INCI: Sodium Saccharin) and b) citric acid (INCI: Citric Acid).

[0016] According to the invention, it is preferred if the preparation contains water and / or glycerin.

[0017] Surprisingly, the objects are also achieved by a process for producing a cosmetic lipstick, which is characterized in that i) sodium saccharin (INCI: Sodium Saccharin) is first dissolved in water and ii) citric acid (INCI: Citric Acid) is dissolved in water in a separate container, ill) in a second step both aqueous solutions are combined one after the other with the fatty phase and iv) the combined solutions are mixed with the remaining ingredients of the preparation and homogenized.

[0018] In the context of the present disclosure, designations as “according to the invention”, “advantageous according to the invention”, etc. always relate to the preparation according to the invention and the process according to the invention, unless otherwise stated.

[0019] Thus, advantageous embodiments of the present invention are characterized in that the lipstick preparation contains sodium saccharin in a concentration of 0.2 to 10% by weight, based on the total weight of the preparation.

[0020] A concentration of less than 1.5% by weight, based on the total weight of the preparation, is preferred according to the invention in the event that sodium saccharin is the only sweetener in the formulation.

[0021] It is also advantageous according to the invention if the lipstick preparation contains citric acid in a concentration of at least 0.05% by weight, based on the total weight of the preparation.

[0022] A concentration of at least 0.25% by weight, based on the total weight of the preparation, is preferred according to the invention in the event that sodium saccharin is the only sweetener in the formulation.

[0023] If the preparation contains, in addition to sodium saccharin, neohesperidin dihydrochalcone and color pigments, a concentration of citric acid of at least 0.1% by weight, based on the total weight of the preparation, is preferred according to the invention.

[0024] In addition to preparations containing sodium saccharin as the sole sweetener, a second embodiment is also advantageous according to the invention, which is characterized in that the lipstick preparation additionally contains neohesperidin dihydrochalcone (INCI: Neohesperidin Dihydrochalcone).

[0025] In such a case, it is advantageous according to the invention if the lipstick preparation additionally contains neohesperidin dihydrochalcone (INCI: Neohesperidin Dihydrochalcone) in a concentration of 0.1 to 5% by weight, based on the total weight of the preparation. In such a case, the process according to the invention is characterized in that, in step i), the neohesperidin dihydrochalcone is dissolved together with the sodium saccharin in the water / glycerin mixture.

[0026] In all cases, it is preferred according to the invention if the water / glycerin mixture contains no more than 25% by weight of glycerin, based on the water / glycerin mixture.

[0027] Advantageous embodiments of the present invention are also characterized in that the lipstick preparation contains one or more dyes selected from the group CI15850 (also Red 6, E180 or Litholrubin), CI42090 (also Blue 1, E133 or Brilliant Blue), CI77491 (also titanium dioxide, E-171), CI77499 and CI77492 (also iron oxides, E-172).

[0028] In such a case, it is preferred according to the invention if the lipstick preparation contains the dyes in a total concentration of 0.05 to 0.5% by weight, based on the total weight of the preparation.

[0029] If the preparation contains CI15850 (also Red 6, E180 or Litholrubin) as the sole colorant, this compound is advantageously used according to the invention in a concentration of 0.05 to 0.4% by weight, based on the total weight of the preparation.

[0030] If the preparation contains a combination of CI15850 and CI42090, the preferred use concentration according to the invention for CI15850 is from 0.05 to 0.4% by weight, based on the total weight of the preparation, and for CI42090 is from 0.02 to 0.15% by weight, based on the total weight of the preparation.

[0031] If the preparation contains CI77491, this compound is advantageously used according to the invention in a concentration of 0.02 to 0.1% by weight, based on the total weight of the preparation.

[0032] If the preparation contains CI77499, this compound is advantageously used according to the invention in a concentration of 0.02 to 0.1% by weight, based on the total weight of the preparation.

[0033] If the preparation contains CI77492, this compound is advantageously used according to the invention in a concentration of 0.005 to 0.05% by weight, based on the total weight of the preparation.

[0034] It is advantageous in the sense of the present invention if the lipstick preparation contains castor oil (INCI: Ricinus Communis Seed Oil).

[0035] For the process according to the invention, the color pigments, among others, are preferably predispersed in this oil before being added to the preparation. It is preferred according to the invention if the preparation contains castor oil in a concentration of 18 to 25% by weight, based on the total weight of the preparation.

[0036] Advantageous embodiments of the present invention are 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 according to the invention in a concentration of 2 to 5% by weight, based on the total weight of the preparation.

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

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

[0040] Furthermore, lip care products advantageous according to the invention are characterized in that the preparation contains cetyl palmitate, hydrogenated rapeseed oil (INCI: Hydrogenated Rapeseed Oil), and / or cetearyl alcohol. The use of hydrogenated rapeseed oil is preferred according to the invention.

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

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

[0043] For hydrogenated rapeseed oil (INCI: Hydrogenated Rapeseed Oil), the advantageous use concentration according to the invention is from 5 to 9% by weight, based on the total weight of the preparation.

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

[0045] Furthermore, it is advantageous according to the invention if the lipstick preparation contains tocopherol and / or ascorbyl palmitate. The use of tocopherol is particularly preferred. The concentration used according to the invention for this substance is from 0.05 to 0.15% by weight, based on the total weight of the preparation. The lipstick formulation according to the invention can advantageously contain one or more UV filters.

[0046] In such a case, it is preferred according to the invention if 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).

[0047] Last but not least, it is advantageous according to the invention if the proportion of hydrophilic components in the lipstick preparation is less than 5% by weight, based on the total weight of the preparation. Hydrophilic components are understood to mean water and water-soluble compounds.

[0048] To disperse these components, polyglyceryl esters such as polyglyceryl-3 diisostearate or polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate are advantageously added to the preparation according to the invention. The use of polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate is preferred according to the invention.

[0049] The preferred use concentration for polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate according to the invention is 1.5 to 2.5% by weight, based on the total weight of the preparation.

[0050] Last but not least, the invention relates to the use of citric acid (INCI: Citric Acid) in cosmetic lipsticks or processes as described in this disclosure to increase the color stability and / or the emulsion stability of the preparation.

[0051] Comparative tests

[0052] The following formulations were prepared and their appearance was visually determined. All concentrations are expressed as a percentage by weight based on the total weight of the preparation. All LAB values ​​listed below were measured with manufactured lip balm sticks using the Hunterlab ColorFlex EZ colorimeter. The sticks are slightly unscrewed from the mechanism and placed upside down on the measuring opening.

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[0058] The Lab values ​​of Examples 16-21 show that with increasing citric acid concentration, the a and b values ​​decrease steadily, thus causing a color change into the blue-green range. The resulting color is visually preferable compared to the original color without citric acid.

[0059] In Examples 22-23, increasing concentrations of citric acid show that the a and b values ​​increase steadily, thus causing a color shift to reddish-yellow. Here, too, the color achieved after adding citric acid is visually preferable. Examples

[0060] The following examples are intended to illustrate the present invention without limiting it. Unless otherwise stated, all quantities, proportions, and percentages are based on the weight and the total amount or the total weight of the preparations.

Claims

Patent claims 1 . Cosmetic lipstick containing a combination of a) sodium saccharin (INCI: Sodium Saccharin) and b) citric acid (INCI: Citric Acid).

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

3. A process for producing a cosmetic lipstick, characterized in that i) sodium saccharin (INCI: Sodium Saccharin) is first dissolved in water and ii) citric acid (INCI: Citric Acid) is dissolved in water in a separate container, ill) in a second step both aqueous solutions are combined one after the other with the fatty phase and iv) the combined solutions are mixed with the remaining ingredients of the preparation and homogenized.

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

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

6. Lipstick or method according to one of the preceding claims, characterized in that the lipstick preparation additionally contains neohesperidin dihydrochalcone (INCI: Neohesperidin Dihydrochalcone).

7. Lipstick or method according to one of the preceding claims, characterized in that the lipstick preparation additionally contains neohesperidin dihydrochalcone (INCI: Neohesperidin Dihydrochalcone) in a concentration of 0.1 to 5% by weight, based on the total weight of the preparation.

8. Process according to one of the preceding claims, characterized in that in step i) the neohesperidin dihydrochalcone is dissolved together with the sodium saccharin in the water / glycerol mixture.

9. The method according to claim 8, characterized in that the water / glycerin mixture contains not more than 25% by weight of glycerin, based on the water / glycerin mixture.

10. Lipstick or method according to one of the preceding claims, characterized in that the lipstick preparation contains one or more dyes selected from the group CI15850 (also Red 6, E180 or Litholrubin), CI42090 (also Blue 1, E133 or Brilliant Blue), CI77491 (also Titanium Dioxide, E-171), CI77499 and CI77492 (also Iron Oxides, E-172).

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

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

13. Lipstick or method according to one of the preceding claims, 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. Lipstick or method according to one of the preceding claims, characterized in that the lipstick preparation contains tocopherol and / or ascorbyl palmitate.

15. Lipstick or method according to one of the preceding claims, 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. Lipstick or method according to one of the preceding claims, characterized in that the lipstick preparation contains hydrophilic components in an amount of less than 5% by weight, based on the total weight of the preparation.

17. Lipstick or method according to one of the preceding claims, characterized in that the lipstick preparation contains polyglyceryl-3 diisostearate or polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate.

18. Use of citric acid (INCI: Citric Acid) in cosmetic lipsticks or processes according to any one of claims 1 to 17 for increasing the color stability and / or the emulsion stability of the preparation.

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