Aqueous composition comprising biosurfactant and glycerol fatty acid ester

Abstract

The invention relates to aqueous compositions comprising biosurfactant and glycerol fatty acid ester in certain amounts and their use in a process for preparations of formulations.

Description

Aqueous composition comprising biosurfactant and glycerol fatty acid esterField of the inventionThe invention relates to aqueous compositions comprising biosurfactant and glycerol fatty acid ester in certain amounts and their use in a process for preparations of formulations.Prior artSo-called biosurfactants are produced in a particularly sustainable way via fermentation processes. Unfortunately, these biosurfactants, especially rhamnolipids, have the disadvantage that their use leads to a viscosity reduction in many aqueous cosmetic surfactant formulations, even when combined with typically effective hydrophobic thickeners. This property makes them difficult to use, because a combination with polyethylene-glycol-based associative thickeners is often not desirable due to their typically fossil origin.Glyceryl fatty acid esters with 8 to 18 carbon atoms, on the other hand, are used in cosmetic formulations as consistency enhancers with skin care properties. However, these esters have the disadvantage that they usually are waxy solids, pastes or at least highly viscous liquids, which are not flowable at typical temperatures in chemical production facilities of 15 °C to 30 °C. Thus, they cannot be cold processed in cosmetic formulations.For example, a widely used blend of 30 weight-% to 35 weight-% Coco-Glucoside and 30 weight-% to 35 weight-% Glyceryl Oleate (INCI) exists in the cosmetic ingredients marketplace; yet this mixture is still a non-pumpable highly viscous paste at 25 °C, which is not easily cold-processable.It is therefore an object of the instant invention to provide highly concentrated, but still pumpable liquid compositions comprising a surfactant and glycerol fatty acid ester, which combine the beneficial properties of the single ingredients and also can increase the viscosity of cleansing formulations. of the inventionSurprisingly, it was found that the compositions of the instant invention solve the above problem of the prior art.The present invention therefore provides a composition comprising at least one biosurfactant, at least one glycerol fatty acid ester, wherein the fatty acid acyl groups comprise 6 to 22 carbon atoms, and water, in certain amounts.The invention further provides a process for preparation of a formulation using the above composition.The invention further provides the use of the above composition for increasing the viscosity of a formulation.One advantage of the present invention is that the compositions according to the instant invention are pumpable and thus cold-processable at temperatures of about 25 °C due to their low viscosity. Another advantage of the present invention is that the compositions according to the instant invention are homogenous and do not have to be homogenized prior to use.A further advantage is that the compositions according to the instant invention can increase the viscosity of aqueous surfactant formulations when incorporated into them.Another advantage is that the compositions according to the instant invention can be incorporated into aqueous surfactant formulations much faster than pure glyceryl fatty acid esters, at high and at low temperatures.Another advantage is that, despite the presence of a surfactant, especially rhamnolipid, the viscosity of the aqueous surfactant formulations can be increased to typical target viscosities of shampoos and shower gels as well as liquid soaps.Another advantage is that the compositions according to the instant invention have a positive effect on the skin feel and the mildness of the cosmetic surfactant formulations they are incorporated into. A further advantage is that the compositions according to the invention exhibit solubilizing properties for hydrophobic components of aqueous formulations.A further advantage is that the compositions according to the instant invention ensure an improved skin moisturization from rinse-off formulations.A further advantage is that the compositions according to the instant invention enable a higher deposition efficiency of the glycerol fatty acid ester from an aqueous surfactant-based formulation.The composition according to the instant invention thus comprisesA) at least one biosurfactant,B) at least one glycerol fatty acid ester, wherein the fatty acid acyl groups comprise 6 to 22 carbon atoms, andC) water, and is characterised in thatcomponent A) is comprised in an amount from 10.0 wt.-% to 60.0 wt.-%, preferably from 15.0 wt.-% to 50.0 wt.-%, particularly preferably from 20.0 wt.-% to 45.0 wt.-%, component B) is comprised in an amount from 3.0 wt.-% to 50.0 wt.-%, preferably from 9.0 wt.-% to 45.0 wt.-%, particularly preferably from 15.0 wt.-% to 35.0 wt.-%, and component C) is comprised in an amount from 10.0 wt.-% to 80.0 wt.-%, preferably from 20.0 wt.-% to 70.0 wt.-%, more preferably from 25.0 wt.-% to 70.0 wt.-%, particularly preferably from 25.0 wt.- % to 60.0 wt.-%, more particularly preferably from 30.0 wt.-% to 60.0 wt.-%, wherein the weight percentages refer to the total composition.Within the context of the present invention, “biosurfactants” are understood as meaning all glycolipids produced by fermentation. The term “biosurfactant” also covers glycolipids that are chemically or enzymatically modified after fermentation, as long as structurally a glycolipid remains. Raw materials for producing the biosurfactants that can be used are carbohydrates, in particular sugars such as e.g. glucose and / or lipophilic carbon sources such as fats, oils, partial glycerides, fatty acids, fatty alcohols, long-chain saturated or unsaturated hydrocarbons.In the context of the present invention, the terms “surfactant” is understood to mean organic substances having interface-active properties that have the ability to reduce the surface tension of water at 20°C and at a concentration of 0.5 wt.-% based on the overall composition to below 45 mN / m. Surface tension is determined by the Du Nouy ring method at 20°C.Where average values are stated hereinbelow, then, unless stated otherwise, these are number- averaged average values.Unless stated otherwise, percentages are data in per cent by weight. The same is true for parts per million (ppm).When determining the mass of a substance, that can be present in the form of its salt, e.g. because of a given pH, especially for component A) of the composition of the instant invention, the mass of the counter ion is disregarded.Wherever measurement values are stated hereinbelow, then, unless stated otherwise, these have been determined at a temperature of 25°C and a pressure of 1013 mbar.Preferably, the composition according to the instant invention is characterized in that the biosurfactant is selected from the group comprising, preferably consisting of, rhamnolipids, in particular mono-, di- or polyrhamnolipids, glucolipids, in particular mono-, di- or polyglucolipids, mannosylerythritollipids and sophorolipids, in particular mono-, di- or polysophorolipids, preferably selected from rhamnolipids and glucolipids, most preferably rhamnolipids.The term "rhamnolipids" in the context of the present invention preferably is understood to mean particularly compounds of the general formula (I) and salts thereof,where mRL = 2, 1 or 0, preferably 1 or 0, nRL = 1 or 0,R1RLand R2RL= mutually independently, identical or different, organic residues having 2 to 24, preferably 5 to 13 carbon atoms, in particular optionally branched, optionally substituted, particularly hydroxy-substituted, optionally unsaturated, in particular optionally mono-, bi- or triunsaturated alkyl residues, preferably those selected from the group consisting of pentenyl, heptenyl, nonenyl, undecenyl and tridecenyl and (CH2)o-CH3 where o = 1 to 23, preferably 4 to 12. If nRL = 1 , the glycosidic bond between the two rhamnose units is preferably in the a-configuration. The optically active carbon atoms of the fatty acids are preferably present as R-enantiomers (e.g. (R)-3-{(R)-3-[2-O-(a-L-rhamnopyranosyl)-a-L-rhamnopyranosyl]oxydecanoyl}oxydecanoate).The term "di-rhamnolipid" in the context of the present invention is understood to mean compounds of the general formula (I) or salts thereof, where nRL = 1.The term "mono-rhamnolipid" in the context of the present invention is understood to mean compounds of the general formula (I) or salts thereof, where nRL = 0.Distinct rhamnolipids are abbreviated according to the following nomenclature: "diRL-CXCY" are understood to mean di-rhamnolipids of the general formula (I), in which one of the residues R1RLand R2RL= (CH2)o-CH3 where o = X-4 and the remaining residue R1or R2= (CH2)O-CH3where o = Y-4."monoRL-CXCY" are understood to mean mono-rhamnolipids of the general formula (I), in which one of the residues R1RLand R2RL= (CH2)o-CH3 where o = X-4 and the remaining residue R1RLor R2RL= (CH2)O-CH3where o = Y-4.The nomenclature used therefore does not distinguish between "CXCY" and "CYCX". For rhamnolipids where mRL=0, monoRL-CX or diRL-CX is used accordingly.If one of the abovementioned indices X and / or Y is provided with ":Z", this signifies that the respective residue R1RLand / or R2RLis equal to an unbranched, unsubstituted hydrocarbon residue having X-3 or Y-3 carbon atoms having Z double bonds.Rhamnolipids applicable in the context of the instant invention can also be produced by fermentation of Pseudomonas, especially Pseudomonas aeruginosa, which are preferably non genetically modified cells, a technology already disclosed in the eighties, as documented e.g. in EP0282942 and DE4127908. Rhamnolipids produced in Pseudomonas aeruginosa cells which have been improved for higher rhamnolipid titres by genetical modification can also be used in the context of the instant invention; such cells have for example been disclosed by Lei et al. in Biotechnol Lett. 2020 Jun;42(6):997-1002.Rhamnolipids produced by Pseudomonas aeruginosa are commercially available from Jeneil Biotech Inc., e.g. under the tradename Zonix.from Logos Technologies (technology acquired by Stepan), e.g. under the tradename NatSurFact, from Biotensidion GmbH, e.g. under the tradename Rhapynal, from AGAE technologies, e.g. under the name R90, R95, R95Md, R95Dd, from Locus Bio-Energy Solutions and from Shanghai Yusheng Industry Co. Ltd., e.g. under the tradename Bio- 201 Glycolipids.The present invention provides a composition preferably comprising as said biosurfactant rhamnolipids, characterized in that the rhamnolipids comprise51 wt.-% to 100 wt.-%, preferably 60 wt.-% to 95 wt.-%, particularly preferably 80 wt.-% to 90 wt- %, of mono-rhamnolipids, especially those of formula (I) with nRL=0, where the percentages by weight refer to the sum of all of the rhamnolipids comprised in the composition.It is more preferred in this context that said mono-rhamnolipids comprise 12 wt.-% to 32 wt.-% monoRL-C8C10, 51 wt.-% to 81 wt.-% monoRL-010010,1 wt.-% to 9 wt.-% monoRLC-10C12,1 wt.-% to 9 wt.-% monoRLC-10C12:1 , wherein the weight percentages refer to all mono-rhamnolipids comprised in the composition.The present invention provides a composition alternatively preferably comprising as said biosurfactant rhamnolipids, characterized in that the rhamnolipids comprise71 wt.-% to 100 wt.-%, preferably 75 wt.-% to 95 wt.-%, particularly preferably 80 wt.-% to 90 wt- %, of di-rhamnolipids, especially those of formula (I) with nRL=1, where the percentages by weight refer to the sum of all of the rhamnolipids comprised in the composition.The present invention further provides a composition preferably comprising as said biosurfactant rhamnolipids, characterized in that the rhamnolipids comprise56 wt.-% to 95 wt.-%, preferably 60 wt.-% to 80 wt.-%, particularly preferably 66 wt.-% to 70 wt.-%, of diRL-C10C10, where the percentages by weight refer to the sum of all of the rhamnolipids comprised in the composition.A preferred composition according to the invention is characterized in that it comprises as said biosurfactant rhamnolipids as described above with a content of0.5 wt.-% to 15 wt.-%, preferably 3 wt.-% to 12 wt.-%, particularly preferably 5 wt.-% to 10 wt.-%, of diRL-C10C12:1 , where the percentages by weight refer to the sum of all of the rhamnolipids comprised in the composition.A further preferred composition according to the invention is characterized in that it comprises as said biosurfactant rhamnolipids as described above with a content of0.5 to 25 wt.-%, preferably 3 wt.-% to 15 wt.-%, particularly preferably 5 wt.-% to 12 wt.-%, of diRL-C10C12, where the percentages by weight refer to the sum of all of the rhamnolipids comprised in the composition.A preferred composition according to the invention is characterized in that it comprises as said biosurfactant rhamnolipids as described above with a content of0.1 wt.-% to 25 wt.-%, preferably 2 wt.-% to 10 wt.-%, particularly preferably 4 wt.-% to 8 wt.-%, of diRL-C8C10, where the percentages by weight refer to the sum of all of the rhamnolipids comprised in the composition.An even further preferred composition according to the invention is characterized in that it comprises as said biosurfactant rhamnolipids as described above with a content of0.1 wt.-% to 5 wt.-%, preferably 0.5 wt.-% to 3 wt.-%, particularly preferably 0.5 wt.-% to 2 wt.-%, of monoRL-C8C10 and / or, preferably and0.1 wt.-% to 5 wt.-%, preferably 0.5 wt.-% to 3 wt.-%, particularly preferably 0.5 wt.-% to 2 wt.-%, of monoRL-C10C10, where the percentages by weight refer to the sum of all of the rhamnolipids comprised in the composition.The present invention provides a composition alternatively preferably comprising as said biosurfactant rhamnolipids, characterized in that the rhamnolipids comprise10 wt.-% to 30 wt.-%, preferably 20 wt.-% to 30 wt.-%, particularly preferably 25 wt.-% to 30 wt.-%, of monoRL-C10C10, where the percentages by weight refer to the sum of all of the rhamnolipids comprised in the composition.The alternatively preferred composition according to the invention is characterized in that it comprises as said biosurfactant rhamnolipids as described above with a content of10 wt.-% to 30 wt.-%, preferably 12 wt.-% to 25 wt.-%, particularly preferably 15 wt.-% to 20 wt.-%, of diRL-C10C10, where the percentages by weight refer to the sum of all of the rhamnolipids comprised in the composition.The alternatively preferred composition according to the invention is characterized in that it comprises as said biosurfactant rhamnolipids as described above with a content of10 wt.-% to 30 wt.-%, preferably 12 wt.-% to 25 wt.-%, particularly preferably 15 wt.-% to 20 wt.-%, of monoRL-C8C10, where the percentages by weight refer to the sum of all of the rhamnolipids comprised in the composition.The alternatively preferred composition according to the invention is characterized in that it comprises as said biosurfactant rhamnolipids as described above with a content of3 wt.-% to 25 wt.-%, preferably 5 wt.-% to 20 wt.-%, particularly preferably 10 wt.-% to 15 wt.-%, of monoRL-C10C12:1, where the percentages by weight refer to the sum of all of the rhamnolipids comprised in the composition.The alternatively preferred composition according to the invention is characterized in that it comprises as said biosurfactant rhamnolipids as described above with a content of1 wt.-% to 15 wt.-%, preferably 2 wt.-% to 10 wt.-%, particularly preferably 3 wt.-% to 8 wt.-%, of diRL-C10C12, where the percentages by weight refer to the sum of all of the rhamnolipids comprised in the composition.In the context of the present invention, the term “sophorolipids” preferably is understood as meaning compounds of the general formulae (Ila) and (lib) and salts thereofwhereR1SL= H or CO-CH3,R2SL= H or CO-CH3,R3SL= a divalent organic moiety which comprises 6 to 32 carbon atoms and which is unsubstituted or substituted by hydroxyl functions, is unbranched and optionally comprises one to three double or triple bonds,R4SL= H, CH3 or a monovalent organic radical which comprises 2 to 10 carbon atoms and which is unsubstituted or substituted by hydroxyl functions, which is unbranched and which optionally comprises one to three double or triple bonds, and nSL = 1 or 0.Sophorolipids may be used in accordance with the invention in their acid form or their lactone form. Preferred compositions according to the instant invention comprise a sophorolipid in which the ratio by weight of lactone form to acid form is in the range of 20:80 to 80:20, especially preferably in the ranges of 30:70 to 40:60.To determine the content of sophorolipids in the acid or lactone form in a formulation, refer to EP1411111 B1 , page 8, paragraph

[0053] ,In connection with the present invention, the term “glucolipids” preferably is understood as meaning compounds of the general formula (III) and salts thereof,where mGL = 3, 2, 1 or 0, preferably 1 or 0,R1GLand R2GL= independently of one another identical or different organic radical having 2 to 24 carbon atoms, in particular optionally branched, optionally substituted, in particular hydroxysubstituted, optionally unsaturated, in particular optionally mono-, di- or triunsaturated, alkyl radical, preferably one selected from the group consisting of pentenyl, heptenyl, nonenyl, undecenyl and tridecenyl and (CH2)o-CH3 where o = 1 to 23, preferably 4 to 12.Distinct glucolipids are abbreviated according to the following nomenclature:“GL-CXCY” is understood as meaning glucolipids of the general formula (III) in which one of the radicals R1GLand R2GL= (CH2)o-CH3 where o = X-4 and the remaining radical R1GLor R2GL= (CH2)o- CH3 where o = Y-4.The nomenclature used thus does not differentiate between “CXCY” and “CYCX”.If one of the aforementioned indices X and / or Y is provided with “:Z”, then this means that the respective radical R1GLand / or R2GL= an unbranched, unsubstituted hydrocarbon radical with X-3 or Y-3 carbon atoms having Z double bonds.Methods for production of glucolipids can be carried out as described in WO2019154970.In connection with the present invention, the term “mannosylerythritollipids” preferably is understood as meaning compounds of the general formula (IV) and salts thereof,formula (IV) where mMEL and nMEL = = independently of one another selected from 4 to 16, preferably from 6 to 10, R1MELand R2MEL= independently of one another selected from H and Ac.A preferred composition according to the instant invention comprisesA) at least one biosurfactant selected from rhamnolipids,B) at least one glycerol fatty acid ester, wherein the fatty acid acyl groups comprise 8 to 18 carbon atoms, andC) water, characterised in that component A) is comprised in an amount from 20.0 wt.-% to 45.0 wt.-%, component B) is comprised in an amount from 15.0 wt.-% to 35.0 wt.-%, and component C) is comprised in an amount from 25.0 wt.-% to 60.0 wt.-%, wherein the weight percentages refer to the total composition.A preferred composition according to the instant invention is characterized in that in said at least one glycerol fatty acid ester the fatty acid acyl groups comprise 8 to 18 carbon atoms and at least 60 wt.-%, preferably 70 wt.-% to 99 wt.-%, of all fatty acid acyl groups of all glycerol fatty acid esters comprised in component B) contain at least one C,C double bond.An even more preferred composition according to the instant invention is characterized in that in said at least one glycerol fatty acid ester the fatty acid acyl groups comprises 8 to 18 carbon atoms and at least 60 wt.-%, preferably 70 wt.-% to 99 wt.-%, of all fatty acid acyl groups of all glycerol fatty acid esters comprised in component B) are oleic acid acyl groups.A preferred composition according to the instant invention is characterized in that said at least one glycerol fatty acid ester has a mean degree of esterification (acyl groups per glycerol including free glycerol) from 0.5 to 1.6, preferably of from 0.6 to 1.4, most preferably of from 0.8 to 1.2.A preferred composition according to the instant invention is characterized in that in said at least one glycerol fatty acid ester at least 60 wt.-%, preferably 70 wt.-% to 99 wt.-%, are glycerol fatty acid monoesters, wherein the weight percentages refer to all glycerol fatty acid esters comprised in component B).A more preferred composition according to the instant invention is characterized in that in said at least one glycerol fatty acid ester the fatty acid acyl groups comprise 8 to 18 carbon atoms and 70 wt.-% to 99 wt.-%, of all fatty acid acyl groups comprised in all glycerol fatty acid esters comprised in component B) are oleic acid acyl groups and 70 wt.-% to 99 wt.-% of all glycerol fatty acid esters comprised in component B) are glycerol fatty acid monoesters.In this context the composition according to the instant invention preferably comprises rhamnolipids as component A).A more preferred composition according to the instant invention is characterized in that it comprisesD) at least one preservative.Component D) preferably is comprised in the composition according to the instant invention in an amount from 0.1 wt.-% to 10.0 wt.-%, preferably from 0.5 wt.-% to 5.0 wt.-%, particularly preferably from 1.0 wt.-% to 3.0 wt.-%.Any preservative known in the art for use in detergents may be utilized. Preferred preservatives comprised in component D) of the composition of the instant invention are selected from the group of phenoxyethanol, sodium levulinate, sodium benzoate, p-anisic acid, potassium sorbate, benzoic acid, glyceryl caprylate, capryl glycol, penthylene glycol, methyl propane diol, bronopol, isothiazolinone (e.g. methylisothiazolinone, chloromethylisothiazolinone) and combinations thereof with sodium benzoate being especially preferred.The present invention provides a process for preparation of a formulation comprising the steps ofI) providing a composition according to the instant invention,II) formulating said composition with at least one further additional component selected from the group of surfactants, emollients, emulsifiers, thickeners, UV light protection filters, antioxidants, hydrotropes, solids and fillers, film formers, pearlescence additives, opacifiers, deodorant and antiperspirant active ingredients, insect repellents, self-tanning agents, preservatives, conditioning agents, perfumes, dyes, odour absorbers, superfatting agents and solvents, preferably perfumes, conditioning agents and thickeners, most preferably perfumes.The formulation prepared by the process according to the instant invention is preferably selected from the group of cosmetic and pharmaceutical formulations.In process step I) of the instant invention those compositions of the instant invention are preferably provided, which are preferred compositions according to the instant invention.In process step II) at least one further additional component is blended with the composition according to the instant invention thereby yielding in the formulation.Substances which can be used as exemplary representatives of the individual groups are known to a person skilled in the art and can, for example, be taken from German Application DE 102008001788.4. This patent application is incorporated in the current document as reference and is accordingly to be regarded as part of the disclosure.With regard to further optional components and also the amounts used of these components, reference is expressly made to the relevant handbooks known to a person skilled in the art, e.g.K. Schrader, "Grundlagen und Rezepturen der Kosmetika [Fundamentals and Formulations of Cosmetics]", 2nd edition, pages 329 to 341, Huthig Buch Verlag, Heidelberg.The amounts of the respective additives depend on the intended use.Typical base formulations for the relevant applications are known prior art and are contained for example in the brochures of the manufacturers of the relevant base materials and active substances. These existing formulations can generally be adopted unchanged. However, if necessary, for adjustment and optimization, the desired modifications can be executed in a straightforward manner through simple tests.A preferred process according to the instant invention is characterised in that said composition is provided in process step I) in an amount, that the prepared formulation comprises the sum of component A) and B) in an amount of from 0.1 wt.-% to 15.0 wt.-%, preferably from 0.5 wt.-% to 10.0 wt.-%, particularly preferably from 1.0 wt.-% to 5.0 wt.-%, wherein the weight percentages refer to the total formulation.The present invention further provides the use of a composition according to the invention for the preparation of a formulation, preferably an aqueous cosmetic or pharmaceutical formulation.The present invention further provides the use of a composition according to the invention for increasing the viscosity of a formulation, preferably an aqueous cosmetic or pharmaceutical formulation.The present invention further provides the use of a composition according to the invention for improving the foam density of a formulation, preferably an aqueous cosmetic or pharmaceutical formulation.The present invention further provides the use of a composition according to the invention for improving the skin feel of a formulation, preferably during washing with the formulation and after 3 minutes, preferably an aqueous cosmetic or pharmaceutical formulation.The present invention further provides the use of a composition according to the invention for reducing the skin roughness.The present invention further provides the use of a composition according to the invention for maintaining a healthy level of the skin moisturization after rinse.The present invention further provides the use of a composition according to the invention with an increased deposition efficiency of the glycerol fatty acid ester from a surfactant-based formulation. The present invention further provides the use of a composition according to the invention to reduce the rinse time to wash off the composition from a surface.In the uses of the instant invention those compositions of the instant invention are preferably used, which are preferred compositions according to the instant invention.The examples adduced hereinafter describe the present invention by way of example, without any intention that the invention, the scope of application of which is apparent from the entirety of the description and the claims, be restricted to the embodiments specified in the examples.The viscosities of the compositions have been measured with a Brookfield Amatek DV1 viscosimeter, using spindle 62 at 30 revolutions per minute and 22 °C. The viscosity was noted after approx. 0.5 min. of stirring, when it was a stable value.Examples:Example 1 (according to the invention)A mixture of 60 g of a 50% aq. Rhamnolipid solution (Rheance® One, INCI: Glycolipids) and 30 g glyceryl monooleate (Einar® 4211 , INCI: Glyceryl Oleate, approx. 90 to 95 % monoester) were stirred at 80 °C. As soon as a homogeneous mixture was formed, it was cooled to 22 °C. The resulting product mixture was a yellow, opaque and homogeneous liquid with a viscosity of 4400 mPa s.Example 2 (according to the invention)A mixture of 60 g of a 50% aq. Rhamnolipid solution (Rheance® One, INCI: Glycolipids), 30 g glyceryl monooleate (Einar® 4211 , INCI: Glyceryl Oleate, approx. 90 to 95 % monoester) and 10 % water were stirred at 80 °C. As soon as a homogeneous mixture was formed, it was cooled to 22 °C. The resulting product mixture was a yellow, opaque and homogeneous liquid with a viscosity of 3450 mPa s.Example 3 (according to the invention)A mixture of 75 g of a 50% aq. Rhamnolipid solution (Rheance® One, INCI: Glycolipids), 25 g glyceryl monooleate (Einar® 4211 , INCI: Glyceryl Oleate, approx. 90 to 95 % monoester) were stirred at 80 °C. As soon as a homogeneous mixture was formed, it was cooled to 22 °C. The resulting product mixture was a yellow, opaque and homogeneous liquid with a viscosity of 1950 mPa s.Example 4 (according to the invention)A mixture of 50 g of a 50% aq. Rhamnolipid solution (Rheance® One, INCI: Glycolipids), 25 g glyceryl monooleate (Einar® 4211 , INCI: Glyceryl Oleate, approx. 90 to 95 % monoester) and 25 g water were stirred at 80 °C. As soon as a homogeneous mixture was formed, it was cooled to 22 °C. The resulting product mixture was a yellow, slightly opaque and homogeneous liquid with a viscosity of 1050 mPa s.Example 5 (according to the invention)A mixture of 55 g of a 50% aq. Rhamnolipid solution (Rheance® One, INCI: Glycolipids), 15 g glyceryl monooleate (Einar® 4211 , INCI: Glyceryl Oleate, approx. 90 to 95 % monoester), 5 g glyceryl mono / dioleate (TEGIN® O V, INCI: Glyceryl Oleate) and 25 g water was stirred at 80 °C.As soon as a homogeneous mixture was formed, it was cooled to 22 °C. The resulting product mixture was a yellow, clear and homogeneous liquid with a viscosity of 780 mPa s.Example 6 (according to the invention)A mixture of 60 g of a 50% aq. Rhamnolipid solution (Rheance® One, INCI: Glycolipids) and 30 g glyceryl monocaprylate (dermosoft® GMCY, INCI: Glyceryl Caprylate, approx. 90 to 95 % monoester) were stirred at 80 °C. As soon as a homogeneous mixture was formed, it was cooled to 22 °C. The resulting product mixture was a yellow, clear and homogeneous liquid with a viscosity of 5750 mPa s.Example 7 (according to the invention)A mixture of 90 g of a 50% aq. Rhamnolipid solution (Rheance® One, INCI: Glycolipids) and 10 g glyceryl monolaurate (TEGIN® L 90, INCI: Glyceryl Laurate, approx. 90 to 95 % monoester) were stirred at 80 °C. As soon as a homogeneous mixture was formed, it was cooled to 22 °C. The resulting product mixture was a a yellow, opaque and homogeneous liquid with a viscosity of 550 mPa s.Example 8 (not according to the invention)A mixture of 45 g of a 50% aq. Rhamnolipid solution (Rheance® One, INCI: Glycolipids) and 55 g glyceryl monooleate (Einar® 4211 , INCI: Glyceryl Oleate, approx. 90 to 95 % monoesters) were stirred at 80 °C. As soon as a homogeneous mixture was formed, it was cooled to 22 °C. The resulting product mixture was a yellowish, turbid and not flowable paste.Example 9 (not according to the invention)A mixture of 45 g of a 50% aq. Rhamnolipid solution (Rheance® One, INCI: Glycolipids) and 55 g glyceryl monocaprylate (dermosoft® GMCY, INCI: Glyceryl Caprylate, approx. 90 to 95 % monoesters) were stirred at 80 °C. As soon as a homogeneous mixture was formed, it was cooled to 22 °C. The resulting product mixture was a yellowish, turbid and not flowable paste.Example 10 (not according to the invention)A mixture of 45 g of a 50% aq. Rhamnolipid solution (Rheance® One, INCI: Glycolipids) and 55 g glyceryl monolaurate (TEGIN® L 90, INCI: Glyceryl Laurate, approx. 90 to 95 % monoesters) were stirred at 80 °C. As soon as a homogeneous mixture was formed, it was cooled to 22 °C. The resulting product mixture was a yellowish, waxy, almost solid paste.Example 11 (not according to the invention)Glyceryl monooleate with approx. 90 to 95 % monoesters, which is a white, waxy, almost solid paste at 22 °C.Example 12 (not according to the invention):50 % aq. Rhamnolipid solution (Rheance® One, INCI: Glycolipids), which is a yellow solution with a viscosity of 30 mPa s at 22 °C.Example 13 (according to the invention):A mixture of 55 g of a 50% aq. Rhamnolipid solution (Rheance® One, INCI: Glycolipids), 25 g glyceryl monooleate (Einar® 4211 , INCI: Glyceryl Oleate, approx. 90 to 95 % monoester) and 20 g glycerin were stirred at 80 °C. As soon as a homogeneous mixture was formed, it was cooled to 22 °C. The resulting product mixture was a yellow, slightly opaque and homogeneous liquid with a viscosity of 3050 mPa s.Example 14 (according to the invention):A mixture of 60 g of a 50% aq. Rhamnolipid solution (Rheance® One, INCI: Glycolipids), 30 g baobab oil (Ecohance Soft Baobab) and 10 g water were stirred at 80 °C. As a homogeneous mixture did not form within 2 hours, it was cooled to 22 °C. The resulting product mixture was a two-phase liquid.In the following, the examples described above have been tested in cosmetic formulations. The specified formulations were prepared by mixing the individual components with water while stirring at 22 °C, topping up with the amount of water added to 95 wt.-% based on the final formulation composition. After 1 hour of stirring, one of the compositions according to Examples 2, 11 and 12 was added, the pH was adjusted to 5.5 for Example 15 and to 5.2 for Example 16 with citric acidand each formulation was topped up with water to 100 wt.-%. Viscosity was measured after homogenization and at least 24 hours of rest at 22 °C with a Brookfield viscometer using spindle 62 at 30 revolutions per minute and a temperature of 22 °C.In the following examples, the INCI nomenclature is used again to describe the ingredients of the formulation.Example 15: Thickening properties in formulation 1Thickening performance of Examples 2, 11 and 12 in one formulation containing 17.5 % of a 32 % aq. Sodium Cocoamphoacetate solution (REWOTERIC® AM C), 8.8% of a 50% aq. Lauryl Glucoside solution (Plantacare 1200 UP), 4.4% of a 50% aq. Coco-Glucoside solution (Plantacare 818 UP) and 14.4% of a 25% aq. Disodium / Sodium Cocoyl Glutamate solution (Perlastan SC 25 NKW)* according to the inventionExamples 2 and 12 were incorporated within 5 minutes at 22 °C. The incorporation of example 11 was not possible at 22 °C. This was carried out at 80 °C and lasted 4 hours. Before incorporating the examples, the viscosity of the formulation was 1900 mPa s.Example 16: Thickening properties in formulation 2Thickening performance of Examples 2, 11 and 12 in a formulation containing 15 % of a 32 % aq. Sodium Cocoamphoacetate solution (REWOTERIC® AM C), 12.6% of a 38% aq. Cocamidopropyl Betaine solution (TEGO® Betain F 50) and 12 % of a 30 % aq. Sodium Lauroyl Sarcosinate solution* according to the inventionExamples 2 and 12 were incorporated within 5 minutes at 22 °C. The incorporation of example 11 was not possible at 22 °C. This was carried out at 80 °C and lasted 3 hours. Before incorporating the examples, the viscosity of the formulation was 300 mPa s.

Claims

Claims1. Composition comprisingA) at least one biosurfactant,B) at least one glycerol fatty acid ester, wherein the fatty acid acyl groups comprise 6 to 22 carbon atoms, andC) water, characterised in that component A) is comprised in an amount from 10.0 wt.-% to 60.0 wt.-%, preferably from 15.0 wt.-% to 50.0 wt.-%, particularly preferably from 20.0 wt.-% to 45.0 wt.-%, component B) is comprised in an amount from 3.0 wt.-% to 50.0 wt.-%, preferably from 9.0 wt.-% to 45.0 wt.-%, particularly preferably from 15.0 wt.-% to 35.0 wt.-%, and component C) is comprised in an amount from 10.0 wt.-% to 80.0 wt.-%, preferably from 25.0 wt.-% to 70.0 wt.-%, particularly preferably from 30.0 wt.-% to 60.0 wt.-%, wherein the weight percentages refer to the total composition.

2. Composition according to claim 1 , characterized in that the biosurfactant is selected from the group comprising rhamnolipids, glucolipids, mannosylerythritollipids and sophorolipids, preferably rhamnolipids.

3. Composition according to claim 1 or 2, characterized in thatA) at least one biosurfactant selected from rhamnolipids,B) at least one glycerol fatty acid ester, wherein the fatty acid acyl groups comprise 8 to 18 carbon atoms, andC) water, characterised in that component A) is comprised in an amount from 20.0 wt.-% to 45.0 wt.-%, component B) is comprised in an amount from 15.0 wt.-% to 35.0 wt.-%, and component C) is comprised in an amount from 25.0 wt.-% to 60.0 wt.-%, wherein the weight percentages refer to the total composition.

4. Composition according to at least one of the preceding claims, characterized in that in said at least one glycerol fatty acid ester the fatty acid acyl groups comprise 8 to 18 carbon atoms and at least 60 wt.-%, preferably 70 wt.-% to 99 wt.-%, of all fatty acid acyl groups of all glycerol fatty acid esters comprised in component B) contain at least one C,C double bond.

5. Composition according to at least one of the preceding claims, characterized in that in said at least one glycerol fatty acid ester the fatty acid acyl groups comprises 8 to 18 carbonatoms and at least 60 wt.-%, preferably 70 wt.-% to 99 wt.-%, of all fatty acid acyl groups of all glycerol fatty acid esters comprised in component B) are oleic acid acyl groups.

6. Composition according to at least one of the preceding claims, characterized in that in said at least one glycerol fatty acid ester at least 60 wt.-%, preferably 70 wt.-% to 99 wt.-%, are glycerol fatty acid monoesters, wherein the weight percentages refer to all glycerol fatty acid esters comprised in component B).

7. Composition according to at least one of the preceding claims, characterized in that in said at least one glycerol fatty acid ester the fatty acid acyl groups comprise 8 to 18 carbon atoms and 70 wt.-% to 99 wt.-%, of all fatty acid acyl groups comprised in all glycerol fatty acid esters comprised in component B) are oleic acid acyl groups and 70 wt.-% to 99 wt.-% of all glycerol fatty acid esters comprised in component B) are glycerol fatty acid monoesters.

8. Composition according to at least one of the preceding claims, characterized in that it comprisesD) at least one preservative, preferably in an amount from 0.1 wt.-% to 10.0 wt.-%, preferably from 0.5 wt.-% to 5.0 wt.-%, particularly preferably from 1.0 wt.-% to 3.0 wt.-%.

9. Process for preparation of a formulation comprising the steps ofI) providing a composition according to at least one of the preceding claims,II) formulating said composition with at least one further additional component selected from the group of surfactants, emollients, emulsifiers, thickeners / viscosity regulators / stabilizers, UV light protection filters, antioxidants, hydrotropes, solids and fillers, film formers, pearlescence additives / opacifiers, deodorant and antiperspirant active ingredients, insect repellents, self-tanning agents, preservatives, conditioning agents, perfumes, dyes, odour absorbers, superfatting agents and solvents.

10. Process according to claim 9, characterised in that said composition is provided in an amount, that the formulation comprises the sum of component A) and B) in an amount of from 0.1 wt.-% to 15.0 wt.-%, preferably from 0.5 wt.-% to 10.0 wt.-%, particularly preferably from 1.0 wt.-% to 5.0 wt.-%, wherein the weight percentages refer to the total formulation.11 . Use of a composition according to at least one of the claims 1 to 8 for the preparation of a formulation.

12. Use of a composition according to at least one of the claims 1 to 8 for elevating the viscosity of a formulation.

13. Use of a composition according to at least one of the claims 1 to 8 for improving the foam density of a formulation.

14. Use of a composition according to at least one of the claims 1 to 8 for improving the skin feel of a formulation.

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