JP-7855571-B2 - Emulsifier composition for personal care formulations

Inventors

• プチェ， フアン セブリアン
• ドゥピン， ラウレ
• ペティット， ジュゼップ リュイス ビリャド
• ミンゲサ， ペドロ ガルデーニョ
• ガッソ， マリオナ カサノヴァ

Assignees

• ルブリゾル アドバンスド マテリアルズ， インコーポレイテッド

Dates

Publication Date

20260508

Application Date

20210730

Priority Date

20200805

Claims (16)

1. a ) 40-70% by weight of microcrystalline cellulose, b ) 2. A biogum of at least one microbial origin in an amount of 5-45% by weight, c ) comprising 8 to 12% by weight of at least one cellulose ether or its derivative, all weight percentages are based on the weight of the total composition. An emulsifier composition comprising at least one biogum of microbial origin containing sphinganexopolysaccharide .
2. The emulsifier composition according to claim 1, wherein the weight ratio of (a):(b):(c) is 2 to 8 (a) , 1 to 20 (b), and (c) is 1.
3. The emulsifier composition according to claim 1, wherein the at least one cellulose ether or derivative thereof is selected from methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxyethylmethylcellulose, methylhydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, sodium carboxymethylcellulose, and mixtures thereof.
4. The emulsifier composition according to claim 1 , wherein the at least one biogum of microbial origin comprises dieutan gum.
5. The emulsifier composition according to claim 1 , wherein the at least one cellulose ether or derivative thereof comprises sodium carboxymethylcellulose.
6. i) Aqueous phase and, ii) Oil phase and iii) A personal care formulation comprising the emulsifier composition according to any one of claims 1 to 5 .
7. The personal care formulation according to claim 6 , wherein the formulation is an emulsion and the aqueous phase is a continuous phase.
8. The personal care formulation according to claim 6 , wherein the formulation is an emulsion and the oil phase is a continuous phase.
9. The personal care formulation according to claim 6 , further comprising a personal care active ingredient, a pharmaceutical active ingredient, and a mixture thereof.
10. The personal care formulation according to claim 6, further comprising fatty alcohols, glyceryl caprylate, polyglyceryl-3 laurate, glyceryl stearate, glyceryl citrate stearate, cetearyl olivate, sorbitan olivate, sodium stearate or potassium stearate, sucrose, sucrose esters of fatty acids, lactate , and a coemulsifier selected from the group consisting of mixtures thereof.
11. The personal care formulation according to claim 6 , further comprising a starch derivative.
12. The personal care formulation according to claim 6 , wherein the emulsifier composition is present in an amount of 0.1 to 5 % by weight based on the total weight of the composition.
13. The personal care formulation according to claim 6 , wherein the oil phase is present in an amount of 5 to 50% by weight based on the total weight of the composition.
14. A method for preparing a personal care formulation as defined in claim 6 , (i) Dispersing the emulsifier composition according to any one of claims 1 to 5 in an aqueous phase, (ii) Stirring the oil phase in the aqueous phase to form an emulsion, and optionally, (iii) A method comprising adjusting the pH of the emulsion to less than 7.
15. A method for stabilizing a composition comprising an oil phase and an aqueous phase, comprising the step of mixing the emulsifier composition according to any one of claims 1 to 5 with the oil phase and the aqueous phase.
16. Use of the composition according to any one of claims 1 to 5 for stabilizing an emulsion containing an oil phase and an aqueous phase.

Description

This invention relates to an emulsifier composition suitable for use in the preparation of personal care formulations comprising an aqueous phase and an oil phase. In particular, the emulsifier composition can be used to formulate personal care formulations containing emulsions, such as skincare and haircare preparations. The emulsifier composition has beneficial effects on the stability, rheology, and consumer acceptability of the formulation. This invention extends to emulsions and personal care formulations comprising the emulsifier composition, as well as methods for preparing them. The invention also extends to the use of the emulsifier composition for stabilizing emulsions comprising an oil phase and an aqueous phase. Emulsions are one of the most common types of formulations used in cosmetic/personal care products. An emulsion is a heterogeneous system, typically a mixture of two or more liquids that do not mix; that is, it is a mixture of two or more liquids that are either immiscible or partially miscible. One of the liquids is distributed into the other liquid in the form of tiny droplets. These droplets form a dispersed phase in the other liquid. The other liquid is called the continuous phase. Emulsions include oil-in-water (O/W) and water-in-oil (W/O) emulsions. Oil-in-water (O/W) emulsions have water as a continuous phase and oil as a dispersed phase. Water-in-oil (W/O) emulsions have oil as a continuous phase and water as a dispersed phase. Emulsions can act as vehicles to provide the skin with large amounts of lipids and lipid-soluble components, resulting in a pleasant skin feel and offering advantages such as smoothness, softness, and/or moisturizing properties. However, emulsions are thermodynamically unstable systems and require stabilization, such as surfactants or polymers, to prevent phase separation over long periods. However, most stabilizing components are synthetic or surfactant molecules and can therefore disrupt the skin barrier. Furthermore, there is growing interest in the use of biodegradable and environmentally friendly ingredients in consumer products, particularly personal care products. The use of biopolymers in the personal care industry is well known. For example, natural polysaccharides can be used as rheological modifiers to adjust the viscosity of formulations. Cellulose is the main component of the primary cell walls of green plants and some algae, and is the most abundant natural polymer in the world. Cellulose is widely used, for example, in the preparation of paper, food, pharmaceuticals, and cosmetics. Cellulose is a polysaccharide consisting of linear chains of hundreds to thousands of glucose units. Cellulose exists in four different forms depending on its source and processing. Naturally occurring cellulose is known as cellulose I and is found in the cell walls of most plants. Cellulose II is used in textiles and can be obtained by heating natural cellulose in the presence of a strong alkali. Cellulose III and cellulose IV are less common and usually exist in combination with types I and II. Cellulose III is amorphous and can be obtained by treating cellulose I or cellulose II with ammonia or amines. Cellulose IV can be obtained by treating cellulose III with glycerol at high temperatures. When cellulose contains both crystalline and amorphous domains, it is known as microfibrillated cellulose (MFC) and is sometimes called nanofibrillated cellulose (NFC). The amorphous domains can be removed by using different processes such as reactive extrusion, enzymatic reactions, mechanical grinding, sonication, steam explosion, and acid hydrolysis with mineral acids such as sulfuric acid, hydrochloric acid, or hydrobromic acid. When this amorphous domain is removed, the product has properties different from those of natural cellulose and microcrystalline cellulose (MCC) (also known as nanocrystalline cellulose (NCC)). MCC is well known in the cosmetics and pharmaceutical industries. It is commonly used as an aqueous thickener, stabilizer, abrasive, absorbent, anti-caking agent, binder, or filler. MCC has also been proposed as an emulsion stabilizer in emulsions stabilized by solid microparticles [Fukisawa et al. "Nanocellulose-stabilized Pickering emulsions and their applications" Science and Technology of Advanced Materials, 2017 vol. 18, no. 1, 959-971]. This type of emulsion is called a Pickering emulsion. Nevertheless, MCC alone as an emulsion stabilizer has several drawbacks. For example, high shear forces are required, applied using sonication or microfluidization, to reduce the droplet size necessary to obtain a stable emulsion. In emulsions, droplet size is a crucial factor in emulsion stability. Smaller droplet sizes result in better stability. Furthermore, high concentrations of MCC are required. Kalashivikova et al. disclose Pickering emulsions stabilized by bacterial cellulose nanocrystals (BCN) [Kalashivikova et al. "New Pickering Emulsions Stabilized by Ba