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Cosmetic compositions

A composition and weight technology, applied in the field of paste formulations and new non-viscous oil-in-water emulsions, can solve problems such as inability to reach high viscosity levels

Active Publication Date: 2021-03-26
BOOTS PURE DRUG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is known that the hydrophilic gelling agents described in patent document FR2940111 cannot reach high viscosity levels in the presence of electrolyte-rich media

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 3

[0106] A suitable method for determining viscosity is shown in Example 3, in particular using a Brookfield RVDV-I Prime viscometer equipped with a heliopath, 120ml capacity polypropylene with a diameter of 50mm and a height of 72mm For plastic containers, spin at 10 revolutions per minute (rpm) for 30 minutes using a T-Bar rotor 93. In all embodiments discussed above, viscosity was measured at 23°C.

[0107] The compositions of the invention have a pH of 2 to 6 (ie, acidic pH). In one embodiment, the pH of the composition is from 3 to 5, more preferably from 3.6 to 4.1.

[0108] The composition which is the subject of the invention may be in the form of a microemulsion.

[0109]The composition which is the subject of the invention can be used by application to the skin, preferably directly.

[0110] The product obtained by the method

[0111] According to another aspect, the subject of the invention is a composition obtainable by a process comprising the steps of:

[011...

Embodiment 1

[0128] Example 1 - 2-methyl-2-[(1-oxo-2-propene) crosslinked with trimethylolpropane triacrylate (TMPTA) Terpolymerization of ammonium)amino]-1-propanesulfonate, N,N-dimethylacrylamide and tetraethoxylated lauryl methacrylate Manufacture of [AMPS / DMAM / MAL(4OE) 77.4 / 19.2 / 3.4 moles] (polyelectrolyte A)

[0129] Under stirring, 592 g of an aqueous solution containing the following were charged into a reactor maintained at 25° C.: 15% by weight of 2-methyl- Ammonium 2-[(1-oxo-2-propenyl)amino]-1-propanesulfonate; 10.1 g of N,N-dimethylacrylamide; 4.2 g of tetraethoxylated lauryl methacrylate and 0.75 g of trimethylolpropane triacrylate.

[0130] After a sufficient time has elapsed to achieve satisfactory homogenization of the solution, the solution is deoxygenated by bubbling nitrogen, heated to 70 °C, and 0.42 g of dilauroyl peroxide is added, followed by cooling the reaction medium at 70 °C Hold for about 1 hour and hold at 80°C for about 2 hours. After cooling, the powd...

Embodiment 2

[0131] The manufacture method of embodiment 2-paste preparation

[0132] Method 1 - Polyelectrolyte A was combined with water in the main vessel by homogenization at 3,500 rpm at 70°C to form the aqueous phase. Xanthan gum (Keltrol RD) was then added and homogenization continued at 70°C at 3,500 rpm. The polysorbate 60 was mixed with the oil phase (including jojoba oil) by stirring at 70°C in a support vessel. The contents of the support vessel were then added to the main vessel and homogenized at 3,500 rpm at 70°C. The composition was then cooled to 30°C.

[0133] The resulting formulation contained chunks of xanthan gum and chunks of polyelectrolyte A.

[0134] Method 2 - In the main vessel, polyelectrolyte A was mixed with water by homogenization at 3,500 rpm at 75°C, forming a portion of the aqueous phase. Xanthan gum (Keltrol RD) was pre-mixed with another part of the aqueous phase, followed by further homogenization at 75°C at 3,500 rpm. In a support vessel, the p...

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Abstract

According to the present invention there is provided composition in the form of an oil-in-water emulsion having a viscosity of between 15,000 cP (15 Pa-s) and 45,000 cP (45 Pa.s) at 23 DEGC, having apH of between 2 and 6 and comprising: (i) at least 1.6 wt. % of at least one cross-linked anionic polyelectrolyte resulting from the polymerisation of partially or completely salified 2 -methyl 2-[(l-oxo 2-propenyl)amino] 1 -propane sulfonic acid, with at least one neutral monomer chosen from the N,N- dialkyl acrylamides, wherein each of the alkyl groups comprises between one and four carbon atoms, and at least one monomer of formula (B): wherein R represents a linear or branched alkyl radical comprising eight to twenty carbon atoms and n represents a number greater than or equal to one and less than or equal to twenty, in the presence of at least one cross-linking agent; (ii) at least 4 wt. % of at least one polysorbate; (iii) at least 0.1 wt. % of at least one polysaccharide gum; and (iv) between 6 wt. % and 30 wt. % water. The present invention also provides a composition as defined above obtainable by a process comprising the following steps: (a) in one vessel, homogenising the polysaccharide gum (iii) into the aqueous phase comprising the water at a temperature of between 60 DEG C and 90 DEG C; (b) in a vessel separate from that in (a), homogenising the cross-linked anionic polyelectrolyte (i) and the polysorbate (ii) into the oil phase at a temperature of between 60 DEG C and 90 DEG C; and (c) combining the ingredients of (a) with the ingredients of (b) through homogenisation at a temperature of between 60 DEG C and 90 DEG C.

Description

technical field [0001] The present invention relates to a novel non-viscous oil-in-water emulsion, paste preparation, which contains polyelectrolyte, polysorbate, polysaccharide gum and 6% to 30% by weight of water. Background technique [0002] Cosmetic compositions sold in the cosmetic industry in the form of oil-in-water emulsions usually contain synthetic thickening polymers to increase the viscosity of said oil-in-water emulsions, these cosmetic compositions can be in the form of creams, lotions, and they are directly applied on the skin. [0003] These synthetic thickening polymers thicken the aqueous phase present in the oil-in-water emulsion to achieve a desired consistency or stabilization of the emulsion. [0004] Synthetic thickening polymers currently used in these areas are in two physical forms, powder and liquid, which are prepared by inverse emulsion free-radical polymerization using surfactants and are commonly referred to as For inverse latex. [0005] A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/49A61K8/73A61K8/81A61Q19/00A61K8/86A61Q19/08A61Q19/10A61K8/06
CPCA61K8/062A61K8/4993A61K8/73A61K8/81A61K8/86A61K2800/54A61Q19/00A61Q19/08A61Q19/10A61K8/361A61K8/365A61K8/88
Inventor 杰克·托马斯·希克斯马尔科·德穆尔塔斯克里斯托夫·约翰·埃尔姆斯保罗·詹姆斯·汤姆林森迈克尔·大卫·贝尔
Owner BOOTS PURE DRUG CO LTD