Natural cosmetic compositions

Abstract

The present invention relates to cosmetic compositions comprising oryza sativa starch (INCI Oryza Sativa (US) starch) and at least one natural organic thickener for stabilization, and to the use of combinations of oryza sativa starch (INCI Oryza Sativa (US) starch) and at least one natural organic thickener.

Description

Technical Field

[0001] The present invention relates to a cosmetic composition comprising oryza sativa starch (INCI Oryza Sativa (rice) starch) and a natural organic thickener for stabilizing a cosmetic composition, and the use of a combination of oryza sativa starch (INCI Oryza Sativa (rice) starch) and a natural organic thickener.

Background Art

[0002] Cosmetic compositions are present everywhere in modern life. Cosmetic compositions cover leave-on and rinse-off products, such as skin and body care including daily care compositions and sunscreens, hair care, such as shampoos, conditioners, shower gels, makeup, and many other products. Requirements for such cosmetic compositions are constantly increasing, regardless of those related to performance, sustainability, or cost. In particular, the sustainability of cosmetic compositions has become even more relevant to consumers and regulatory authorities.

[0003] In this regard, generally, the use of microplastics and synthetic polymers in cosmetic compositions is increasingly under scrutiny. There is a growing demand from consumers for cosmetics that generally do not contain microplastics and further do not contain synthetic polymers in general. Therefore, cosmetic compositions free of microplastics and synthetic polymers are generally desired.

[0004] Another important aspect of sustainability is the procurement of materials. In this regard, bio-based materials are becoming increasingly desirable. In contrast to materials derived from fossil resources, such as synthetic polymers, bio-based materials have a substantially smaller carbon footprint. Unfortunately, these materials often do not provide the same performance as conventional materials derived from fossil resources.

[0005] A key requirement for cosmetic compositions is the stability of the formulation, especially over longer storage periods. This is particularly challenging for sunscreens, as such compositions typically contain a large number of different components, including, for example, liquid or solid water-soluble or oil-soluble UV filters, particulate UV filters, solubilizers, emulsifiers, etc. Sunscreens generally contain high oil loads, which affect the physical (macroscopic) stability of the formulation and make it difficult to obtain high-viscosity compositions. Sunscreens are also used in extreme temperature conditions, i.e., hot summers or cold winters, which presents further challenges for the stability of sunscreen products.

[0006] These factors can contribute to the separation of components or phases within a cosmetic composition, resulting in a heterogeneous composition. This process can occur rapidly within a few days or slowly over several weeks or months. However, the formation of a heterogeneous and unstable composition can significantly affect the appearance and sensory characteristics of the product, or even adversely impact the performance of personal care products. For example, a heterogeneous and unstable sunscreen composition may no longer provide the expected and anticipated protection from UV radiation.

[0007] Therefore, there remains a need to develop sustainable cosmetic compositions that are free of microplastics and possess good medium- to long-term stability. [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] Therefore, an object of the present invention is to provide a cosmetic composition containing bio-based materials.

[0009] Furthermore, an object of the present invention is to provide sustainable cosmetic compositions derived from bio-based materials.

[0010] Furthermore, an object of the present invention is to provide a cosmetic composition that does not contain microplastics and / or synthetic polymer materials.

[0011] Another object of the present invention is to provide a cosmetic composition with high macroscopic stability and long-term storage stability.

[0012] A further object of the present invention is to provide high-viscosity cosmetic compositions suitable for different personal care applications. [Means for solving the problem]

[0013] According to a first aspect, the present invention relates to a cosmetic composition comprising oryza sativa starch (INCI Oryza Sativa (US) starch) and at least one natural organic thickener, wherein the cosmetic composition comprises less than 0.1% by weight of synthetic polymer material based on the total weight of the cosmetic composition, and the cosmetic composition comprises at least one organic or inorganic UV filter. It has been found that at least one of the objectives of the present invention can be achieved by such a cosmetic composition.

[0014] During a comprehensive investigation of viable bio-based materials for application to cosmetic compositions, such as daily care compositions with or without sunscreen or UV protection, we surprisingly discovered that Oryza sativa starch (INCI Oryza Sativa (rice) starch), a specific type of starch derived from rice, significantly increases the stability of cosmetic compositions when combined with at least one natural organic thickener. Interestingly, neither rice starch alone nor natural organic thickeners alone can provide sufficient stability to cosmetic compositions. However, combining these two bio-based materials makes it possible to provide high-viscosity cosmetic compositions that maintain stability for weeks and months. When using these two bio-based materials in combination, no further synthetic polymer thickeners, synthetic polymer binders, synthetic polymer water-retaining agents, or any other type of synthetic polymer material are required to obtain cosmetic compositions with excellent viscosity properties. This also applies to sunscreen compositions, especially those with complex ingredient compositions and high oil loads.

[0015] While not bound by any specific scientific theory, the interaction between oryza sativa starch (INCI Oryza Sativa (US) starch) and at least one natural organic thickener is thought to provide a stable and persistent structure to the formulation. The viscosity of the composition remains stable even during long storage periods.

[0016] A second aspect of the present invention relates to the use of a combination of oryza sativa starch (INCI Oryza Sativa (US) starch) and at least one natural organic thickener to stabilize a cosmetic composition, wherein the cosmetic composition contains less than 0.1% by weight of synthetic polymer material based on the total weight of the cosmetic composition, and the cosmetic composition contains at least one organic or inorganic UV filter. As described with respect to the first aspect of the present invention, it has been surprisingly discovered that the combination of oryza sativa starch (INCI Oryza Sativa (US) starch) and a natural organic thickener effectively stabilizes the cosmetic composition. These two components provide the structural integrity required for different types of cosmetic compositions and provide long-term stability to these cosmetic compositions.

[0017] A third aspect of the present invention relates to the use of a combination of oryza sativa starch (INCI Oryza Sativa (US) starch) and at least one natural organic thickener to increase the viscosity of a cosmetic composition, wherein the cosmetic composition contains less than 0.1% by weight of synthetic polymer material based on the total weight of the cosmetic composition, and the cosmetic composition contains at least one organic or inorganic UV filter.

[0018] A fourth aspect of the present invention relates to a method for preparing a cosmetic composition by mixing oryza sativa starch (INCI Oryza Sativa (US) starch), at least one natural organic thickener, and other components of the cosmetic composition, wherein the cosmetic composition contains less than 0.1% by weight of synthetic polymer material based on the total weight of the cosmetic composition, and the cosmetic composition contains at least one organic or inorganic UV filter.

[0019] The present invention will be described with reference to specific embodiments and specific examples, but the present invention is not limited thereto and is defined solely by the appended claims. [Modes for carrying out the invention]

[0020] definition As used herein and in the appended claims, the singular forms “a” and “an” also include their respective plural forms unless otherwise explicitly indicated in the context. In the context of the present invention, the terms “about” and “approximately” refer to a range of precision that a person skilled in the art would recognize as still ensuring the technical effect of the feature in question. This term typically refers to a deviation of ±20%, preferably ±15%, more preferably ±10%, and even more preferably ±5% from the given numerical value. The term “comprising” should be understood to be non-limiting. The term “consisting of” with respect to the object of the present invention is considered a preferred embodiment of the term “comprising of.” Hereinafter, where a group is defined as including at least a certain number of embodiments, this also means that a group consisting preferably of only these embodiments is also included. Furthermore, the terms “first,” “second,” “third,” or “(a),” “(b),” “(c),” “(d),” and similar terms in this specification and the claims are used to distinguish similar elements and do not necessarily describe a continuous or chronological order. The terms used in this manner are interchangeable under appropriate circumstances, and it should be understood that embodiments of the present invention described herein may be carried out in an order other than that described or illustrated herein. In the case of terms such as “first,” “second,” “third,” or “(a),” “(b),” “(c),” “(d),” “i,” “ii,” relating to methods, uses, or steps of an assay, unless otherwise indicated in this application, there may be no time interval between these steps or inconsistent time intervals, as described or described herein; that is, these steps may be carried out simultaneously, or there may be time intervals of a few seconds, a few minutes, a few hours, a few days, a few weeks, a few months, or a few years between such steps. It should be understood that the present invention is not limited to the specific methods, procedures, reagents, etc. described herein, as they may be modified.The terminology used in this specification is for the sole purpose of describing particular embodiments and is not intended to limit the scope of the present invention, which should be understood to be limited only by the appended claims. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art.

[0021] As used herein, the terms "does not comprise" or "free of" mean, in the context of a composition not containing a particular compound or group of compounds that may be combined under a generic term, that the composition contains less than 0.8% by weight of said compound or group of compounds based on the total weight of the composition. Further, it is preferred that the composition according to the invention contains less than 0.5% by weight of said compound or group of compounds, and it is preferred that the composition contains no amount of said compound or group of compounds at all.

[0022] When referring to the weight percentages of the composition and the components contained therein, according to the present invention, it should be understood that the total amount of the components does not exceed 100% (±1% by rounding).

[0023] The prefixes Cn~Cm indicate, in each case, the possible number of carbon atoms of the group. <()

[0024] The term "alkyl C12~C15 benzoate" refers to an ester of benzoic acid and a fatty alcohol containing a C12~C15 alkyl chain. The C12~C15 alkyl chain is defined as an alkyl chain having a chain length of C12, C13, C14 or C15.

[0025] As used herein, the term "Cn~Cm carboxylic acid" refers, in each case, to a straight-chain or branched carboxylic acid having n~m carbon atoms, for example, 6~24 carbon atoms.

[0026] As used herein, the term "Cn-Cm alcohol" in each case refers to a straight-chain or branched alcohol having n to m carbon atoms, for example, having 3 to 24 carbon atoms or 6 to 24 carbon atoms or 1 to 22 carbon atoms.

[0027] As used herein, the term "C2-C12 dicarboxylic acid" in each case refers to a dicarboxylic acid having 2 to 12 carbon atoms, for example, succinic acid, glutaric acid, adipic acid or sebacic acid.

[0028] As used herein, the term "dialkyl ether" in each case refers to a straight-chain or branched dialkyl ether having a total of 12 to 36 carbon atoms and containing at least one ether moiety.

[0029] As used herein, the term "C6-C22 alcohol carbonate" in each case refers to a straight-chain or branched alcohol carbonate having 6 to 22 carbon atoms and containing at least one functional group consisting of a carbonyl group adjacent to two alkoxy groups.

[0030] As used herein, the term "alkyl" refers, in each case, exemplary to a linear or branched alkyl group having 1 to 18 carbon atoms. Examples of alkyl groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, 2-butyl, isobutyl, tert-butyl, n-pentyl, 1-methylbutyl, 2-methylbutyl, 3-methylbutyl, 2,2-dimethylpropyl, 1-ethylpropyl, n-hexyl, 1,1-dimethylpropyl, 1,2-dimethylpropyl, 1-methylpentyl, 2-methylpentyl, 3-methylpentyl, 4-methylpentyl, 1,1-dimethylbutyl, 1,2-dimethylbutyl, 1,3-dimethylbutyl, 2,2-dimethylbutyl, 2,3-dimethylbutyl, 3,3-dimethylbutyl, 1-ethylbutyl, 2-ethylbutyl, 1,1,2-trimethylpropyl, 1,2,2-trimethylpropyl, 1-ethyl-1-methylpropyl, and 1-ethyl-2-methylpropyl.

[0031] As used herein, the term "alkoxy" refers in each case to a linear or branched alkyl group that is linked via an oxygen atom and typically has 1 to 20 carbon atoms. Examples of alkoxy groups include methoxy, ethoxy, n-propoxy, isopropoxy, n-butyloxy, 2-butyloxy, isobutyloxy, and tert.-butyloxy.

[0032] As used herein, the term "carboxyalkyl" includes carboxymethyl, carboxyethyl, carboxypropyl, carboxyisopropyl, carboxybutyl, carboxyisobutyl, carboxyamyl, carboxyhexyl, carboxyheptyl, carboxyoctyl, carboxyisooctyl, carboxynonyl, carboxydecyl, carboxyundecyl, carboxydodecyl, carboxytetradecyl, carboxyhexadecyl, and carboxyoctadecyl, with carboxymethyl being preferred.

[0033] As used herein, the term "cycloalkyl" refers in each case to a monocyclic or alicyclic group having typically 3 to 10 or 5 to 8 carbon atoms, such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, and cyclodecyl, or cyclopropyl, cyclobutyl, cyclopentyl, and cyclohexyl.

[0034] As used herein, the term “substituted” means that a hydrogen atom bonded to a specified atom is replaced with a particular substituent, provided that the substitution results in a stable or chemically feasible compound. Unless otherwise specified, a substituted atom may have one or more substituents, each substituent selected independently.

[0035] The term "cosmetic composition" refers to any topical product intended to be applied to the human body for cleansing, beautification, enhancement of attractiveness, alteration of appearance, or protection of the skin, without affecting the structure or function of the body. Possible cosmetic compositions within the scope of the present invention include leave-on and rinse-off products, such as daily care compositions with or without UV protection, and face and body care, hair care products, such as shampoos, conditioners, shower gels, makeup compositions, and similar compositions, including sunscreens or sunscreen compositions.

[0036] The terms “sunscreen composition” or “sunscreen” refer to any topical product capable of absorbing, reflecting, and scattering specific portions of UV radiation. Therefore, it should be understood that the term “sunscreen composition” encompasses not only sunscreen compositions but also any cosmetic compositions that provide UV protection. The term “topical product” refers to a product applied to the skin, which may be, for example, a spray, lotion, cream, oil, foam, powder, or gel. According to the present invention, a sunscreen composition may contain one or more activators, such as organic and inorganic UV filters, and other components or additives, such as emulsifiers, emollients, viscosity modifiers, stabilizers, preservatives, or fragrances.

[0037] The term “daily care composition” refers to any topical product intended for daily use, with or without UV protection. If UV protection is included, the daily care composition can absorb, reflect, and scatter specific portions of UV radiation and is used as a daily care product for the human body, e.g., face or body. A daily care composition may contain one or more activators, e.g., organic and / or inorganic UV filters, as well as other components or additives, e.g., emulsifiers, emollients, viscosity modifiers, stabilizers, preservatives, or fragrances. A suitable daily care composition according to the present invention is, for example, a leave-on face and body care product.

[0038] Leave-on products suitable for the face and body include, for example, sunscreens and skincare products.

[0039] Suitable skincare formulations include, for example, moisturizing formulations, anti-aging formulations, refining formulations, and lifting formulations. The leave-on compositions listed herein may be in the form of creams, ointments, pastes, foams, gels, lotions, powders, makeup cosmetics, sprays, sticks, or aerosols. Daily care compositions with UV protection protect human skin from damage caused by UV light.

[0040] As used herein, the terms “UV filter” or “ultraviolet filter” refer to organic or inorganic compounds that can absorb, reflect, and scatter ultraviolet radiation produced by sunlight. UV filters can be classified as UV-A, UV-B, or broadband filters based on their UV absorbance profiles. Preferably, the term “UV filter” includes or consists of any UV filter as defined in Annex VI (11.11.2022 edition) of Regulation (EC) No. 1223 / 2009 of the European Parliament and Commission.

[0041] According to the present invention, the term "stabilization of cosmetic composition" is defined as the stabilization of the structural integrity of the cosmetic composition. The stabilization of the structural integrity of the cosmetic composition is preferably determined by visual evaluation over time at different storage temperatures (macroscopic stability), microscopic evaluation, centrifugal analysis, and measurement of viscosity and pH over time, and most preferably by visual evaluation. Visual evaluation is performed by visually determining whether the composition remains homogeneous (e.g., no oil release and no water separation). Centrifugal evaluation can be used as an accelerated stability test. To determine whether the combination of oryza sativa starch and a natural organic thickener results in the stabilization of the cosmetic composition, the stability of the cosmetic composition is evaluated by one of the methods mentioned above, once without the addition of the combination of oryza sativa starch and a natural organic thickener, and once with the addition of the combination of oryza sativa starch and a natural organic thickener. We have discovered that using the present invention's combination of oryza sativa starch and a natural organic thickener results in a more stable cosmetic composition compared to compositions that do not contain this combination.

[0042] The solubility of the water-soluble UV filter in water is at least 2% by weight, preferably at least 3% by weight, and more preferably at least 5% by weight.

[0043] The solubility of the oil-soluble filter in a particular emollient is at least 2% by weight, preferably at least 3% by weight, and more preferably at least 5% by weight.

[0044] The term "emollient" refers to certain cosmetic oils used to protect, moisturize, and smooth the skin. The word "emollient" originates from the Latin word "mollire" (to soften). Generally, emollients prevent moisture evaporation from the skin by forming an occlusive coating. Alternatively, or in addition, emollients improve the distribution of products on the skin. Mollients can be divided into different groups according to their polarity index.

[0045] The term "sensitive skin" refers to skin whose natural barrier function is weakened and compromised by certain triggers. These triggers can include, for example, cold climates, extremely hot water, and potentially harmful ingredients found in sunscreens or daily care compositions.

[0046] As used herein, the term “ultraviolet protection factor (SPF)” indicates how well a sunscreen composition protects the skin from primarily UV-B radiation. Specifically, this factor indicates how much longer protected skin can be exposed to sunlight without sunburn compared to untreated skin. For example, if a sunscreen composition with SPF 15 is applied evenly to the skin of a person who would normally sunburn after 10 minutes in the sun, the sunscreen will allow a person skilled in the art to stay in the sun 15 times longer. In other words, SPF 15 means that, assuming the sunscreen is applied evenly at a thickness of 2 milligrams per square centimeter (mg / cm²), 1 / 15 of the UV radiation that would cause a burn will reach the skin.

[0047] The definition of "broadband" protection (also called broad-spectrum or broad-spectrum protection) may be based on, for example, a "critical wavelength" or UVA-PF. To cover a broadband, UV-B and UV-A protection must be provided. According to US requirements, a critical wavelength of at least 370 nm is required to achieve broad-spectrum protection. Furthermore, the European Commission recommends that all sunscreen or cosmetic composition should have a UV-A protection index of at least one-third of its stated ultraviolet protection factor (SPF). For example, if a sunscreen composition has an SPF of 30, its UVA protection index must be at least 10.

[0048] The term "critical wavelength" is defined as the wavelength at which the area under the UV protection curve (protection rate (%) relative to wavelength) reaches 90% of the total area under the curve in the UV region (290-400 nm). For example, a critical wavelength of 370 nm means that the protection provided by the sunscreen composition is not limited to UV-B wavelengths, i.e., wavelengths of 290-320 nm, but extends up to 370 nm, at which point 90% of the total area under the UV protection curve is reached.

[0049] The term "administration" refers to applying sunscreen or daily care composition to human skin.

[0050] In this invention, the term "rice starch" refers to oryza sativa starch (INCI Oryza Sativa (rice) starch) unless otherwise specified.

[0051] In the context of "natural organic thickeners," the term "natural" refers to components that are entirely, at least partially, preferably entirely, derived from natural resources. Natural resources are any biological or mineral resources provided by nature. In the sense of this invention, natural resources include, among other things, plants, forests, vegetation, surface water and groundwater, fertile land, soil, and minerals. Natural resources within the scope of this invention do not include products derived from fossil resources such as petroleum, natural gas, crude oil, or coal. An alternative term to "natural" in this invention is "bio-based." These terms are meant to be used interchangeably within this invention. When the term "natural" is used in a context other than that of "natural organic thickeners," its meaning is the same as that defined for "natural organic thickeners," unless otherwise stated.

[0052] In the context of "natural organic thickeners," the term "organic" refers to an organic compound or a mixture of organic compounds. An organic compound is one of the broad categories of compounds in which one or more carbon atoms are covalently bonded to other elements, most commonly carbon, hydrogen, oxygen, or nitrogen atoms. Some carbon-containing compounds that are not classified as organic include carbides, carbonates, and cyanides. When the term "organic" is used in a context other than that of "natural organic thickeners," its meaning is the same as that defined for "natural organic thickeners," unless otherwise specified.

[0053] In the context of "natural organic thickeners," the term "thickener" refers to a component that increases the viscosity of a mixture. A thickener can increase the viscosity of a composition, for example, by binding with a liquid present in the composition, particularly water. In some cases, a thickener may gel upon contact with water. In other cases, a thickener may not gel upon contact with water. Those skilled in the art are familiar with typical thickeners and their general properties. The terms "thickener" and "thickening agent" are intended to be interchangeable within this invention. When the term "thickener" is used in a context other than that of "natural organic thickeners," its meaning is the same as that defined for "natural organic thickeners," unless otherwise specified.

[0054] However, the term “synthetic thickener” refers to thickeners as defined above, derived from fossil resources, particularly oils and gases through several reaction and processing steps. Synthetic thickeners are artificially produced by synthesis and processing. Types of synthetic thickeners include synthetic polymers and microplastics with thickening activity. Common synthetic thickeners include homopolymers or polyacrylamides of acrylates or acrylic acid reticulates, such as carbomers, acrylate copolymers, acrylate / C10-C30 alkyl acrylate crosspolymers, acrylate / beheneth-25 methacrylate copolymers, VP / eicosene copolymers, VP / hexadecane copolymers, and triacontanyl PVP. The cosmetic compositions of the present invention preferably do not contain synthetic thickeners.

[0055] In this specification, the term "microplastic" refers to small solid particles manufactured from synthetic polymers. Some synthetic thickeners can be microplastics, and vice versa. Microplastic solid particles are often non-water soluble and preferably have a particle size distribution Dv50 of less than 5 mm. Examples of microplastics used in cosmetic compositions in the art include styrene / PVP or styreneacrylamide copolymers, polyamide derivatives such as nylon 12; polymethyl methacrylate; and polyethylene. Furthermore, it is preferable that the cosmetic compositions of the present invention do not contain microplastics.

[0056] In this specification, the term “synthetic polymer materials” refers to polymer materials derived from fossil resources, particularly oils and gases, through several reaction and processing steps. In this specification, the term “polymer materials” also refers to materials consisting of macromolecules, which are large molecules composed of repeating subunits that chemically bond to form long polymer chains. Polymer materials are obtained by the polymerization of many small molecules known as monomers. Synthetic thickeners and microplastics are part of the “synthetic polymer materials” group.

[0057] Any description made relating to the components, features, or characteristics of a first aspect of the present invention applies equally to other aspects of the present invention. Any description made relating to the components, features, or characteristics of a second aspect of the present invention applies equally to other aspects of the present invention. Any description made relating to the components, features, or characteristics of a third aspect of the present invention applies equally to other aspects of the present invention. Any description made relating to the components, features, or characteristics of a fourth aspect of the present invention applies equally to other aspects of the present invention.

[0058] Specific embodiments of the present invention A first aspect of the present invention relates to a cosmetic composition comprising oryza sativa starch (INCI Oryza Sativa (US) starch) and at least one natural organic thickener, wherein the cosmetic composition contains less than 0.1% by weight of synthetic polymer material based on the total weight of the cosmetic composition, and the cosmetic composition contains at least one organic or inorganic UV filter. The combination of US starch and at least one natural organic thickener in the cosmetic composition provides stability and structural integrity to the cosmetic composition for several weeks to several months. The combination of oryza sativa starch (INCI Oryza Sativa (US) starch) and at least one natural organic thickener increases the viscosity of the cosmetic composition, making it possible to use such a composition in many different areas of application within the scope of cosmetics. The combination of these two components yields a substantially better, unexpected synergistic effect than the effect of using either oryza sativa starch or at least one natural organic thickener on its own. In addition, compositions containing oryza sativa starch (INCI Oryza Sativa (US) starch) and at least one natural organic thickener have a lower carbon footprint and improved sustainability compared to compositions based on conventional stabilization systems based on synthetic thickeners. Cosmetic compositions can also exhibit higher biodegradability than compositions based on components derived purely from fossil resources and do not need to contain synthetic polymers and microplastics.

[0059] In general, a wide range of different types of natural organic thickeners can be used in the present invention. According to preferred embodiments of the present invention, the natural organic thickener is selected from the group consisting of polysaccharides, polypeptides, proteins, and mixtures thereof. Polysaccharides, polypeptides, proteins, and mixtures thereof have been found to be particularly suitable as natural organic thickeners in combination with oryza sativa starch (INCI Oryza Sativa (US) starch). In addition, polysaccharides, polypeptides, and proteins are readily found in nature and can be entirely bio-based.

[0060] According to another preferred embodiment of the present invention, the natural organic thickener is a polysaccharide selected from the group consisting of natural gum, pectin, cellulose, chitin, callose, and mixtures thereof. Polysaccharides are readily available in nature, are entirely bio-based, and are effective in binding with water. Natural gum, pectin, cellulose, chitin, callose, and mixtures thereof are polysaccharides commonly found in nature. Furthermore, these polysaccharides exhibit good biodegradability and are particularly compatible with other typical cosmetic ingredients.

[0061] In a particularly preferred embodiment, the natural organic thickener is a natural gum selected from the group consisting of agar, alginic acid / sodium alginate (algin), carrageenan, gum arabic, gum ghati, gum tragacanth, karaya gum, locust bean gum, β-glucan, dammar gum, glucomannan, plantain seed husk, tara gum (Caesalpinia spinosa gum), gellan gum, xanthan gum, and mixtures thereof. Natural gums have been found to be excellent thickeners in combination with oryza sativa starch (INCI Oryza Sativa (US) starch). They are readily available and economical.

[0062] The most preferred types of natural organic thickeners are natural rubbers selected from the group consisting of xanthan gum, tara gum (Caesalpinia Spinosa gum), alginic acid / sodium alginate (algin), and mixtures thereof. According to one embodiment of the present invention, the natural organic thickener is xanthan gum. According to another embodiment of the present invention, the natural organic thickener is tara gum. According to another embodiment of the present invention, the natural organic thickener is alginic acid / sodium alginate (algin). Xanthan gum, tara gum, and algin are excellent natural thickeners that, when combined with oryza sativa starch, bind particularly effectively to other components of cosmetic compositions.

[0063] The oryza sativa starch particles used in the present invention may be provided in different forms or shapes. According to one embodiment, the oryza sativa starch particles have a polygonal particle shape. The term "polygonal particle shape" as used herein means that at least 75% of the particles in a sample of oryza sativa starch have three or more vertices or angles, preferably four or more vertices or angles, and more preferably five or more vertices or angles, as identified by electron microscopy. Oryza sativa starch particles (INCI Oryza Sativa (US) starch) with a polygonal particle shape are particularly well-suited for providing excellent structural integrity in cosmetic compositions.

[0064] The oryza sativa starch (INCI Oryza Sativa (US) starch) used in the present invention may also have different particle size distributions. According to one preferred embodiment, the oryza sativa starch (INCI Oryza Sativa (US) starch) has a particle size distribution Dv50 measured by static laser scattering of 2 to 10 μm, particularly 6 to 8 μm. Oryza sativa starch having such a Dv50 value has been found to be particularly suitable for providing optimal structural stability in cosmetic compositions.

[0065] The particle size distribution Dv50 of oryza sativa starch (INCI Oryza Sativa (US) starch) is preferably measured by static laser scattering. In this invention, the Dv50 value was measured using static laser scattering with a Beckman Coulter LS-13 230 particle size analyzer with PIDS and a universal liquid module, using a 2% US starch suspension in deionized water.

[0066] The oryza sativa starch (INCI Oryza Sativa (US) starch) used in the composition of the present invention has the ability to effectively bind to liquids such as oil. Preferably, the oryza sativa starch (INCI Oryza Sativa (US) starch) has an oil adsorption capacity of 0.5 to 1.0 g, preferably 0.7 to 0.8 g, of oil per 1.0 g of starch. Due to the oil adsorption capacity of the oryza sativa starch used, the cosmetic composition maintains particularly high viscosity and structural integrity.

[0067] Methods for measuring the oil adsorption capacity of starch are known in the art. The oil adsorption capacity of oryza sativa starch (INCI Oryza Sativa (US) starch) can be measured by weighing out a sample containing oryza sativa starch, mixing it with excess oil in a weighed centrifuge tube to obtain a dispersion, centrifuging this dispersion to completely remove the supernatant, and then weighing the centrifuge tube containing the starch and the oil absorbed by the starch.

[0068] The amount of oryza sativa starch (INCI Oryza Sativa (US) starch) in the cosmetic composition of the present invention can be varied over a wide range depending on the relevant cosmetic application. A higher amount of oryza sativa starch may result in a higher viscosity and a more concentrated cosmetic composition, while a lower amount of oryza sativa starch generally results in a lower viscosity composition (equal to all other components). According to a preferred embodiment of the present invention, the amount of oryza sativa starch (INCI Oryza Sativa (US) starch) in the cosmetic composition is 0.6 to 10.0% by weight, based on the total weight of the cosmetic composition. Oryza sativa starch (INCI Oryza Sativa (US) starch) in the range of 0.6 to 10.0% by weight is particularly suitable for obtaining cosmetic compositions with excellent long-term stability. According to a particularly preferred embodiment of the present invention, the amount of oryza sativa starch (INCI Oryza Sativa (US) starch) in the cosmetic composition is 1.0 to 8.0% by weight, more preferably 1.5 to 6.0% by weight, and most preferably 1.5 to 4.0% by weight, based on the total weight of the cosmetic composition.

[0069] The cosmetic composition of the present invention contains at least one natural organic thickener. According to a preferred embodiment of the present invention, the amount of the natural organic thickener is at least 0.05% by weight, preferably 0.05 to 5% by weight, based on the total weight of the cosmetic composition. It has been found that amounts of the natural organic thickener of 0.08 to 3% by weight, preferably 0.1 to 2% by weight, more preferably 0.15% to 1% by weight, and most preferably 0.2% to 0.5% by weight, based on the total weight of the cosmetic composition, are particularly suitable for providing structural integrity to the cosmetic composition of the present invention.

[0070] In the present invention, it has been discovered that oryza sativa starch (INCI Oryza Sativa (US) starch) combined with at least one natural organic thickener provides a stable, sufficiently viscous, and homogeneous cosmetic composition. Generally, the cosmetic composition of the present invention may further include starches such as wheat starch, potato starch, corn starch, tapioca starch, arrowroot starch, or manioc starch. However, according to a preferred embodiment of the present invention, the cosmetic composition does not contain starches other than oryza sativa starch (INCI Oryza Sativa (US) starch). In this specification, the term "starch-free other than oryza sativa starch" means that the cosmetic composition does not contain any other source starch, preferably in an amount of 0.1% by weight or less, preferably 0.05% by weight or less, and more preferably 0.01% by weight or less. It is advantageous to have only oryza sativa starch as a starch component in the composition because other starch components may affect the rheological properties of the composition.

[0071] The cosmetic composition of the present invention further comprises at least one organic or inorganic UV filter. The presence of at least one organic or inorganic UV filter provides protection of the skin from hazardous UVA and UVB radiation.

[0072] At least one type of organic or inorganic UV filter, UVA absorption filter - 4-(tert.-butyl)-4'-methoxydibenzoylmethane (INCI butylmethoxydibenzoylmethane), - 2-[4-(diethylamino)-2-hydroxybenzoyl]hexyl benzoate (INCI diethylaminohydroxybenzoyl hexyl benzoate), - [(3Z)-3-[[4-[(Z)-[7,7-dimethyl-2-oxo-1-(sulfomethyl)-3-bicyclo[2.2.1]heptanylidene]methyl]phenyl]methylidene]-7,7-dimethyl-2-oxo-1-bicyclo[2.2.1]heptanyl]methanesulfonic acid (INCI terephthalylidene dicamfersulfonic acid), - Phenyldibenzimidazole tetrasulfonate disodium, - 1,1'-(1,4-piperazinediyl)bis[1-[2-[4-(diethylamino)-2-hydroxybenzoyl]phenyl]methanone (INCI bis-(diethylaminohydroxybenzoylbenzoyl)piperazine), - 2-Ethoxyethyl(2Z)-2-cyano-2-[3-(3-methoxypropylamino)cyclohexa-2-ene-1-ylidene]acetate (INCI Methoxypropylaminocyclohexenylidene ethoxyethyl cyanoacetate); Broad-spectrum (UVA + UVB) absorption filter - 2,4-bis-{[4-(2-ethylhexyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine (INCI bis-ethylhexyloxyphenylmethoxyphenyltriazine), - 2,2'-Methylenebis[6-(2H-1,2,3-benzotriazol-2-yl)--4-(2,4,4-trimethylpentan-2-yl)phenol](INCI methylenebis-benzotriazoltetramethylbutylphenol), - 2-(2H-benzotriazol-2-yl)-4-methyl-6-[2-methyl-3-[1,3,3,3-tetramethyl-1-[(trimethylsilyl)oxy]-1-disiloxanyl]propyl]phenol (INCI drometrizole trisiloxane), - Phenylenebis-diphenyltriazine, - Zinc oxide, UVB absorption filter - 2-phenyl-1H-benzimidazole-5-sulfonic acid (INCI phenylbenzimidazole sulfonic acid), - Tris-biphenyltriazine, - 4,4',4''-(1,3,5-triazine-2,4,6-triyltriimino)tris-benzoate tris(2-ethylhexyl) ester (INCI ethylhexyl triazone), - (RS)-2-ethylhexyl-2-hydroxybenzoate (INCI ethylhexyl salicylate), - Dimethicone diethyl benzalmalonate (INCI Polysilicone-15), - Diethylhexylbutamide triazone, - Titanium dioxide, - Cerium oxide; It is preferable to select from the group consisting of these and mixtures thereof. These UV filters are commonly used as UV filters with excellent UV protection properties.

[0073] According to a further preferred embodiment of the present invention, at least one organic or inorganic UV filter is an organic UV filter selected from the group consisting of 4-(tert.-butyl)-4'-methoxydibenzoylmethane (INCI butyl methoxydibenzoylmethane), 2-[4-(diethylamino)-2-hydroxybenzoyl]hexyl benzoate (INCI diethylamino hydroxybenzoyl hexyl benzoate), 2,4-bis-{[4-(2-ethyl-hexyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine (INCI bis-ethylhexyloxyphenyl methoxyphenyl triazine), 4,4',4''-(1,3,5-triazine-2,4,6-triyltriimino)tris-benzoate tris(2-ethylhexyl) ester (INCI ethylhexyl triazone), and mixtures thereof. These UV filters absorb UV radiation particularly effectively and have a good ecological footprint.

[0074] In a particularly preferred embodiment of the present invention, the cosmetic composition comprises at least one UV-A filter and at least one UV-B filter. The cosmetic composition is more preferably further comprising at least one broadband UV filter. The most preferred UV-A filter is 2-[4-(diethylamino)-2-hydroxybenzoyl]hexyl benzoate (INCI diethylaminohydroxybenzoylhexyl benzoate) and / or butylmethoxydibenzoylmethane. The most preferred UV-B filter is 4,4',4''-(1,3,5-triazine-2,4,6-triyltriimino)tris-benzoate tris(2-ethylhexyl) ester (INCI ethylhexyl triazone). The most preferred broadband UV filter is 2,4-bis-{[4-(2-ethylhexyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine (INCI bis-ethylhexyloxyphenylmethoxyphenyltriazine). The combination of 2-[4-(diethylamino)-2-hydroxybenzoyl]hexyl benzoate (INCI diethylaminohydroxybenzoylhexyl benzoate), 2,4-bis-{[4-(2-ethyl-hexyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine (INCI bis-ethylhexyloxyphenylmethoxyphenyl triazine), and 4,4',4''-(1,3,5-triazine-2,4,6-triyltriimino)tris-benzoate tris(2-ethylhexyl) ester (INCI ethylhexyl triazone) is particularly preferred because it very effectively covers the entire UV absorption spectrum relevant to skin protection. However, other UV filter combinations are also possible for optimal UV-A and UV-B protection.

[0075] According to another preferred embodiment, the cosmetic composition does not contain any of the UV filters 2-ethylhexyl-2-cyano-3,3-diphenyl-2-propenoate (INCI octocrylene), (RS)-2-ethylhexyl-(2E)-3-(4-methoxyphenyl)propa-2-enoate (INCI ethylhexyl methoxycinnamate), and 3,3,5-trimethyl-cyclohexyl salicylate (INCI homosalate). There are growing concerns that these UV filters may have adverse effects on health and / or the environment. Therefore, it is preferable that the cosmetic composition does not contain these filters.

[0076] The cosmetic composition of the present invention preferably contains, in particular, an emulsifier, a skin emollient, and further, an additive selected from the group consisting of viscosity modifiers (thickeners), texture enhancers, auxiliary agents, preservatives, fragrances, and combinations thereof.

[0077] Preferred emulsifiers include: - Glucose derivatives such as cetearyl glucoside, arachidyl glucoside, lauryl glucoside, polyglyceryl-3 methylglucose distearate, and methylglucose sesquistearate; - Sucrose derivatives such as sucrose polystearate and sucrose palmitate; - Sorbitol derivatives; - Glycerides of fatty acids such as glyceryl stearate and glyceryl oleate; - Glutamic acid derivatives such as sodium stearoyl glutamate; - Sulfosuccinate derivatives such as cetearyl disodium sulfosuccinate; - Phosphate derivatives such as potassium cetyl phosphate; - Polyglyceryl fatty acid esters such as polyglyceryl-3 diisostearate and polyglyceryl-2 dipolyhydroxystearate; - Examples include oxyalkenylated organic modified silicones / polysiloxanes / polyalkyl / polyether copolymers and derivatives.

[0078] Preferred emollients include: - Esters of linear or branched fatty alcohols and linear or branched fatty acids, such as propylheptyl caprylate, coconut alkyl caprylate, isopropyl myristate, and ethylhexyl palmitate; - C 12 ~C 15 Esters of linear or branched fatty alcohols such as alkyl benzoate, ethylhexyl benzoate, and phenethyl benzoate with aromatic carboxylic acids; - Dicarboxylic acid esters with linear or branched alcohols such as dibutyl adipate, dicaprylyl carbonate, and diisopropyl sebacate; - Esters of linear or branched fatty alcohols with hydroxycarboxylic acids; - Esters of polyhydric alcohols such as dicaprylic acid / butylene glycol dicaprate with linear or branched fatty acids; - Caprylic / capric triglyceride, cocoglycerides, etc. (C6-C) 18 Fatty acid-based mono, di, and triglycerides; - Guerbet alcohols such as octyldodecinol; - Hydrogenated polyisobutene, mineral oil, squalene, isohexadecane, and other hydrocarbons; - Ethers such as dicaprylyl ether; Examples include silicone derivatives such as dimethylpolysiloxane and cyclic silicones (organically modified polysiloxanes).

[0079] Preferred thickeners include: - Fatty alcohols such as cetyl alcohol, cetearyl alcohol, and stearyl alcohol; - Fatty acids such as stearic acid; - Fatty acid esters such as myristyl stearate; - Waxes such as beeswax, carnauba wax, microcrystalline wax, ceresin, and ozokerite; - Silicate derivatives such as magnesium silicate; - Examples include cellulose derivatives such as hydroxypropylcellulose.

[0080] Preferred texture enhancers include: - Silica; - Maika; - Polymethylsilsesquioxane; - Starch derivatives such as aluminum starch octenyl succinate; - Dimethicone derivatives; - Boron nitride; - HDI / trimethylol hexyllactone crosspolymer, - Perlite is one example.

[0081] Preferred moisturizers include: - 1,2-pentadiols; - 1,2-hexanediol; - 1,2-octanediol; - 1,2-decanediol; - 2-methyl-1,3-propanediol is one example.

[0082] Preferred auxiliary agents include: - Tocopherol derivatives; - Retinol derivatives; - Ascorbic acid derivatives; - Bisabolol; - Allantoin; - Panthenol; - Chelating agents (EDTA, EDDS, EGTA, phytic acid, piroctone olamine); - Ethylhexylglycerin; - Hydroxyacetophenone; - Caprylhydroxamic acid; - Propellant agents such as propane, butane, isobutene, and dimethyl ether; - Examples of insecticides include butylacetylaminopropionate.

[0083] Preferred preservatives include: - Benzyl alcohol; - Zingerone is one example.

[0084] Preferred fragrances include limonene, citral, linalool, alpha-isomethyl ionone, geraniol, citronellol, 2-isobutyl-4-hydroxy-4-methyltetrahydropyran, 2-tert-pentylcyclohexyl acetate, 3-methyl-5-phenyl-1-pentanol, 7-acetyl-1,1,3,4,4,6-hexamethyltetraline, diester adipate, alpha-amyl cinnamaldehyde, alpha-methyl ionone, amyl C-butylphenyl methylpropional cinnamal, amyl salicylate, amyl cinnamyl alcohol, anise alcohol, benzoin, benzyl alcohol, benzyl benzoate, benzyl cinnamate, benzyl salicylate, bergamot oil, bitter orange oil, and butylphenyl methyl Selected from the group consisting of butylphenylmethylpropioal, cardamom oil, cedrol, cinnamal, cinnamyl alcohol, citronellyl methylcrotate, lemon oil, coumarin, diethyl succinate, ethyl linalool, eugenol, Ebernia furfrasea extract, Ebernia prunustri extract, pharensol, guaiac wood oil, hexyl cinnamal, hexyl calicylate, hydroxycitronellal, lavender oil, lemon oil, linalyl acetate, mandarin oil, menthyl PCA, methylheptenone, nutmeg oil, rosemary oil, sweet orange oil, terpineol, tonka bean oil, triethyl citrate, vanillin, and combinations thereof.

[0085] The cosmetic composition of the present invention preferably contains two or more of the additives described above. In relation to the above preferred embodiments, it should be understood that if the cosmetic composition contains two or more additives, any combination of the additives as defined above is also part of the present invention.

[0086] In relation to the above preferred and particularly preferred embodiments, it should be understood that the cosmetic composition may further contain water.

[0087] When water is present in a cosmetic composition, it should be understood that, preferably, the amount of water is greater than 5% by weight based on the total weight of the composition. Furthermore, when water is present in a cosmetic composition, it should be understood that the cosmetic composition may be an oil-in-water emulsion (O / W emulsion), a water-in-oil emulsion (W / O emulsion), a gel cream, or an oil-in-gel.

[0088] In one embodiment of the present invention, the cosmetic composition can be provided in various forms, such as a gel, cream, oil, lotion, stick, or sprayable product.

[0089] In a particularly preferred embodiment, the cosmetic composition of the present invention is free of microplastics. In another particularly preferred embodiment, the cosmetic composition of the present invention is free of synthetic thickeners. It is more preferable that the cosmetic composition of the present invention is free of microplastics and synthetic thickeners. The term "free of" as used herein means that the cosmetic composition contains less than 0.1% by weight, preferably less than 0.001% by weight, and most preferably less than 0.0001% by weight, of the total weight of the cosmetic composition, microplastics or synthetic thickeners.

[0090] The cosmetic composition of the present invention contains less than 0.1% by weight of synthetic polymer material based on the total weight of the cosmetic composition. According to preferred embodiments, the cosmetic composition contains less than 0.01% by weight, more preferably less than 0.001% by weight, and most preferably less than 0.0001% by weight of synthetic polymer material based on the total weight of the cosmetic composition. The characteristic that the composition contains less than 0.1% by weight of synthetic polymer material based on the total weight of the cosmetic composition includes embodiments in which the composition does not contain synthetic polymer material. In fact, it is particularly preferable that the cosmetic composition does not contain synthetic polymer material. The term synthetic polymer material includes synthetic thickeners, microplastics, and other synthetic polymers.

[0091] According to a preferred embodiment of the present invention, the cosmetic composition is VP / eicosene copolymer-free, i.e., contains less than 0.0001% by weight of VP / eicosene copolymer based on the total weight of the cosmetic composition.

[0092] According to another preferred embodiment of the present invention, the cosmetic composition is VP / hexadecane copolymer-free, i.e., contains less than 0.0001% by weight of VP / hexadecane copolymer based on the total weight of the cosmetic composition.

[0093] According to another preferred embodiment of the present invention, the cosmetic composition is free of triacontanyl PVP, that is, it contains less than 0.0001% by weight of triacontanyl PVP based on the total weight of the cosmetic composition.

[0094] The cosmetic composition of the present invention comprises at least one organic or inorganic UV filter. In this context, it is more preferable that the cosmetic composition has an SPF (Ultraviolet Protection Factor) value of at least 6 to at most 50+ (as recommended by the EC). The SPF can be measured by simulation calculation using the BASF sunscreen simulator (https: / / sunscreensimulator.basf.com / ) or exemplarily in vivo or in vitro: a preferred in vitro method can be carried out as follows. In vitro SPF was determined based on the evaluation of the UV transmittance through thin films of sunscreen samples spread on roughened substrates such as Helioscreen, Creil, and France's SB6 PMMA plates (roughness 4-5 μm, area 4.8 × 4.8 cm). The sunscreen formulation to be tested was applied at a concentration of 1.2 mg / cm² on the PMMA plate. 2 The product was applied in the specified amount. Three plates were used for each type of formulation, and five measurements were taken per plate. The formulation was spread as evenly as possible on the plate by hand. The plates coated with the formulation were stored at room temperature in a dark place for 30 minutes before measurement.

[0095] In vitro transmittance measurements were performed at 290-400 nm in 1 nm increments using a Labsphere UV Transmittance Analyzer UV 2000S. UV transmission spectra were obtained, and the in vitro SPF value was calculated according to the following equation (average SPF of all 15 measurements (5 measurements per plate for 3 plates)).

number

[0096] The present invention also relates to the use of a combination of oryza sativa starch (INCI Oryza Sativa (US) starch) and at least one natural organic thickener to stabilize a cosmetic composition, wherein the cosmetic composition contains less than 0.1% by weight of synthetic polymer material based on the total weight of the cosmetic composition, and the cosmetic composition contains at least one organic or inorganic UV filter. As discussed in relation to the compositions of the present invention, the combination of oryza sativa starch (INCI Oryza Sativa (US) starch) and a natural organic thickener provides a stable and storable cosmetic composition without the need for any synthetic thickeners.

[0097] This disclosure relating to cosmetic compositions of the present invention also applies, with modifications as necessary, to the use of a combination of oryza sativa starch (INCI Oryza Sativa (US) starch) and at least one natural organic thickener for stabilizing the cosmetic composition.

[0098] The present invention also relates to the use of oryza sativa starch (INCI Oryza Sativa (US) starch) and at least one natural organic thickener to increase the viscosity of a cosmetic composition, wherein the cosmetic composition contains less than 0.1% by weight of synthetic polymer material based on the total weight of the cosmetic composition, and the cosmetic composition contains at least one organic or inorganic UV filter. The use of oryza sativa starch (INCI Oryza Sativa (US) starch) and at least one natural organic thickener results in an increase in viscosity of the cosmetic composition compared to a cosmetic composition that does not contain the combination of oryza sativa starch (INCI Oryza Sativa (US) starch) and at least one natural organic thickener.

[0099] This disclosure relating to cosmetic compositions of the present invention is also applicable, with modifications to the use of a combination of oryza sativa starch (INCI Oryza Sativa (US) starch) and at least one natural organic thickener to increase the viscosity of the cosmetic composition.

[0100] Furthermore, the present invention provides oryza sativa starch (INCI Oryza Sativa (US) starch), at least one natural organic thickener, and other components of the cosmetic composition for obtaining a cosmetic composition, and relates to a method for preparing the cosmetic composition of the present invention by mixing oryza sativa starch (INCI Oryza Sativa (US) starch), at least one natural organic thickener, and other components, wherein the cosmetic composition contains less than 0.1% by weight of synthetic polymer material based on the total weight of the cosmetic composition, and the cosmetic composition contains at least one organic or inorganic UV filter.

[0101] The present invention will be further explained by the following examples. [Examples]

[0102] The composition comprising the combination of oryza sativa starch and at least one natural organic thickener, as well as comparative examples, were prepared as follows:

[0103] First, parts A and B were prepared separately and then heated to 80°C while stirring. Part A was incorporated into part B while increasing the stirring, and homogenized in an Ultra Turrax. The mixture was then allowed to cool to room temperature (25°C) while stirring. Next, part C was added to the mixture, and the combined mixture was stirred. Finally, part D was added, and the resulting final mixture was stirred at room temperature for a further 30 minutes. The pH of the mixture was adjusted to 6.0-7.0 with citric acid.

[0104] Cosmetic compositions as shown in Table 1 were obtained. The cosmetic compositions according to the present invention contain oryza sativa (US) starch and 0.30% by weight of natural organic thickeners, namely tara gum, algin, and xanthan gum (Examples of the present invention, Inv.Ex.1-3). Comparative cosmetic compositions either do not contain oryza sativa starch (Comp.Ex.1-3) or do not contain natural organic thickeners (Comp.Ex.4).

[0105] [Table 1]

[0106] Algin-containing formulations require the addition of a divalent cation, specifically calcium chloride dihydrate, to activate gel formation by generating a so-called "egg box" structure.

[0107] Each formulation was filled into a 250 mL glass bottle, and the viscosity of the different compositions, Inv.Ex.1-3 and Comp.Ex.1-4, was measured using Brookfield DVIII 24 hours after preparation. In addition, the stability of the different compositions was evaluated visually at room temperature after different time periods (24 hours, 1 month, 2 months, and 3 months). Table 2 shows the results of the viscosity measurement and macroscopic stability evaluation.

[0108] [Table 2]

[0109] The data in Table 2 shows that the compositions of the present invention exhibit substantially higher viscosity than the comparative compositions. Rice starch alone does not provide sufficient thickening ability to obtain an acceptable viscosity for topical cosmetic compositions (viscosity Comp.Ex.4 η=112 mPa.s). In addition, this formulation exhibited phase separation within 2 months. Interestingly, when rice starch was added to compositions containing natural organic thickeners, the viscosity of all tested compositions increased by more than 2.5 times. The compositions of the present invention, containing rice starch and natural organic thickeners, exhibited excellent stability for 1 to 3 months without any phase separation. In contrast, the comparative examples without rice starch (Comp.Ex.1-3) exhibited phase separation and / or suboptimal viscosity characteristics after storage for a certain period.

[0110] Both the composition of Comparative Example 3 and the composition of Example 3 of the present invention, which contains xanthan gum as a natural organic thickener, remained stable after a 3-month storage period, although the viscosity of the composition of the present invention was nearly three times higher than that of the comparative composition. To simulate the effects of longer storage periods, accelerated stability tests were performed on the compositions of Comparative Example 3 and Example 3 of the present invention. Centrifugal evaluation was used as the accelerated stability test. For this purpose, 15 g of each formulation was transferred to a centrifuge tube. The centrifugation conditions were 5000 rpm for 10 minutes. The centrifuge used for the stability test was a Heraeus Multifuge X1R. After the centrifugation step, the two samples were analyzed for phase separation. In the case of Example 3 of the present invention, the formulation remained completely homogeneous even after centrifugation. In contrast, in the formulation of Comparative Example 3, a clearly visible phase separation was observed in the centrifuge tube after centrifugation. Thus, when the accelerated stability test was performed by centrifugal evaluation, a clear difference in stability could be observed for the formulation of Example 3 of the present invention, in contrast to Comparative Example 3.

[0111] The examples demonstrate that cosmetic compositions containing oryza sative starch and at least one natural organic thickener exhibit excellent viscosity and stability properties.

Claims

1. A cosmetic composition, - Oryza sativa starch (INCI Oryza Sativa (US) starch) and - At least one natural organic thickener A cosmetic composition comprising, wherein the cosmetic composition comprises less than 0.1% by weight of a synthetic polymer material based on the total weight of the cosmetic composition, and the cosmetic composition comprises at least one organic or inorganic UV filter.

2. The cosmetic composition according to claim 1, characterized in that the natural organic thickener is selected from the group consisting of polysaccharides, polypeptides, proteins, and mixtures thereof.

3. The cosmetic composition according to claim 2, characterized in that the natural organic thickener is a polysaccharide selected from the group consisting of natural rubber, pectin, cellulose, chitin, callose, and mixtures thereof.

4. The cosmetic composition according to claim 3, characterized in that the natural organic thickener is agar, alginate / sodium alginate (algin), carrageenan, gum arabic, gum ghati, gum tragacanth, karaya gum, locust bean gum, β-glucan, dammar gum, glucomannan, plantain seed husk, tara gum (Caesalpinia spinosa gum), gellan gum, xanthan gum, and mixtures thereof, particularly a natural rubber selected from the group consisting of alginate / sodium alginate (algin), xanthan gum, and tara gum (Caesalpinia spinosa gum).

5. The cosmetic composition according to any one of claims 1 to 4, characterized in that the oryza sativa starch (INCI Oryza Sativa (US) starch) particles have a polygonal particle shape.

6. The cosmetic composition according to any one of claims 1 to 5, characterized in that the oryza sativa starch (INCI Oryza Sativa (US) starch) has a particle size distribution Dv50 measured by static laser scattering of 2.0 to 10.0 μm, particularly 6.0 to 8.0 μm, and / or the oryza sativa starch (INCI Oryza Sativa (US) starch) has an oil adsorption capacity of 0.5 to 1.0 g, particularly 0.7 to 0.8 g, per 1.0 g of starch.

7. The cosmetic composition according to any one of claims 1 to 6, characterized in that the cosmetic composition does not contain microplastics and / or does not contain synthetic thickeners.

8. The cosmetic composition according to any one of claims 1 to 7, characterized in that the amount of oryza sativa starch (INCI Oryza Sativa (US) starch) in the cosmetic composition is 0.6 to 10.0% by weight, particularly 1.0 to 8.0% by weight, 1.5 to 6.0% by weight, or 1.5 to 4.0% by weight, based on the total weight of the cosmetic composition, and / or the amount of a natural organic thickener is at least 0.05% by weight, particularly 0.05 to 5.0% by weight, 0.08 to 3.0% by weight, 0.1 to 2.0% by weight, 0.15 to 1.0% by weight, or 0.2 to 0.5% by weight, based on the total weight of the cosmetic composition.

9. The cosmetic composition according to any one of claims 1 to 8, characterized in that the cosmetic composition does not contain starch other than oryza sativa starch (INCI Oryza Sativa (US) starch).

10. The aforementioned at least one organic or inorganic UV filter, - 4-(tert.-butyl)-4'-methoxydibenzoylmethane (INCI butylmethoxydibenzoylmethane), - 2-[4-(diethylamino)-2-hydroxybenzoyl]hexyl benzoate (INCI diethylaminohydroxybenzoyl hexyl benzoate), - 2,4-bis-{[4-(2-ethylhexyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine (INCI bis-ethylhexyloxyphenylmethoxyphenyltriazine), - 2-phenyl-1H-benzimidazole-5-sulfonic acid (INCI phenylbenzimidazole sulfonic acid), - Tris-biphenyltriazine, - 1,1'-(1,4-piperazinediyl)bis[1-[2-[4-(diethylamino)-2-hydroxybenzoyl]phenyl]methanone (INCI bis-(diethylaminohydroxybenzoylbenzoyl)piperazine), - Phenylenebis-diphenyltriazine, - 2,2'-methylenebis[6-(2H-1,2,3-benzotriazol-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenol] (INCI methylenebis-benzotriazoltetramethylbutylphenol), - [(3Z)-3-[[4-[(Z)-[7,7-dimethyl-2-oxo-1-(sulfomethyl)-3-bicyclo[2.2.1]heptanylidene]methyl]phenyl]methylidene]-7,7-dimethyl-2-oxo-1-bicyclo[2.2.1]heptanyl]methanesulfonic acid (INCI terephthalylidene dicamfersulfonic acid), - Phenyldibenzimidazole tetrasulfonate disodium, - 4,4',4''-(1,3,5-triazine-2,4,6-triyltriimino)tris-benzoate tris(2-ethylhexyl) ester (INCI ethylhexyltriazone), - (RS)-2-ethylhexyl-2-hydroxybenzoate (INCI ethylhexyl salicylate), - Dimethicone diethyl benzalmalonate (INCI Polysilicone-15), - Diethylhexylbutamide triazone, - 2-Ethoxyethyl (2Z)-2-Cyano-2-[3-(3-Methoxypropylamino)cyclohexa-2-ene-1-ylidene]acetate (INCI Methoxypropylaminocyclohexenylidene Ethoxyethyl Cyanoacetate), - 2-(2H-benzotriazol-2-yl)-4-methyl-6-[2-methyl-3-[1,3,3,3-tetramethyl-1-[(trimethylsilyl)oxy]-1-disiloxanyl]propyl]phenol (INCI drometrizole trisiloxane), - Titanium dioxide, - Zinc oxide, - Cerium oxide and mixtures thereof A cosmetic composition according to any one of claims 1 to 9, characterized in that it is selected from the group consisting of the following.

11. The cosmetic composition according to claim 10, characterized in that the at least one organic or inorganic UV filter is an organic UV filter selected from the group consisting of 2-[4-(diethylamino)-2-hydroxybenzoyl]hexyl benzoate (INCI diethylaminohydroxybenzoylhexyl benzoate), butyl methoxydibenzoylmethane, 2,4-bis-{[4-(2-ethyl-hexyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine (INCI bis-ethylhexyloxyphenylmethoxyphenyl triazine), 4,4',4''-(1,3,5-triazine-2,4,6-triyltriimino)tris-benzoate tris(2-ethylhexyl) ester (INCI ethylhexyl triazone), and mixtures thereof.

12. The cosmetic composition according to any one of claims 1 to 11, characterized in that the cosmetic composition does not contain any of the UV filters 2-ethylhexyl-2-cyano-3,3-diphenyl-2-propenoate (INCI octocrylene), (RS)-2-ethylhexyl-(2E)-3-(4-methoxyphenyl)propane-2-enoate (INCI ethylhexyl methoxycinnamate), and 3,3,5-trimethyl-cyclohexyl salicylate (INCI homosalate).

13. The use of a combination of oryza sativa starch (INCI Oryza Sativa (US) starch) and at least one natural organic thickener to stabilize a cosmetic composition, wherein the cosmetic composition contains less than 0.1% by weight of synthetic polymer material based on the total weight of the cosmetic composition, and the cosmetic composition contains at least one organic or inorganic UV filter.

14. The use of a combination of oryza sativa starch (INCI Oryza Sativa (US) starch) and at least one natural organic thickener to increase the viscosity of a cosmetic composition, wherein the cosmetic composition contains less than 0.1% by weight of synthetic polymer material based on the total weight of the cosmetic composition, and the cosmetic composition contains at least one organic or inorganic UV filter.

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