Patent Application
20200261328
The present invention relates to a personal care product particularly a moldable gel cleanser that has improved properties.
Consumers like foam producing products for a variety of personal care uses, such as hair and body shampoos, facial cleansers and shave preparation gels. Foam based personal care products have a pleasant feel. Consumers particularly like high and thick foams, quick foaming action, lasting foams, and the feel of rich, luxurious, creamy foams. To achieve these desirable effects, surfactants are added to many personal care products. Surfactants play a major role in foam producing products by lowering the dynamic surface tension of the liquid-air interface to allow gas bubbles to be formed or introduced beneath the surface of the liquid. Surfactants also stabilize the foam once it is formed. However, surfactants are not without disadvantages. For example, some surfactants, such as sulfates, including alkyl sulfates and alkyl ether sulfates, are known to be irritating to the skin.
It is known that you can produce cosmetic jellies by mixing a surfactant with an extract of seaweed. Such products have been sold commercially but have not been widely adopted, at least in part due to the properties of the jelly. That is, the known cosmetic jellies have a semi-liquid form and when, for example, applied to the human body with water they break down into the consistency of a lumpy paste.
U.S. Published Application No. 20080206273 to Cosmetic Warriors, Ltd. discloses a cosmetic product that contains surfactant, glycerine, monopropylene glycol and optionally carrageenan. The reference discloses that the inclusion of monopropylene glycol, mixed with the glycerine, has an effect upon the consistency of the jelly, resulting in the jelly having a durable and almost rubber-like texture. The reference also discloses that the effects are surprising when the jelly contains a seaweed extract, since it was thought that such an extract would be destabilised by the presence of glycerine and monopropylene glycol. This U.S. application, which corresponds to International Published Application No. WO2006067400, was abandoned in 2010.
U.S. Pat. No. 9,028,872 to FMC Corporation discloses a foam, methods of preparation, and uses thereof. The reference discloses that the foam, which may be used in personal care applications, is preferably a polysaccharide and that examples of suitable polysaccharides for producing the foam include alginates, pectins, carrageenans, hyaluronates, chitosan and mixtures thereof.
U.S. Pat. No. 10,064,881 to Y&B Mother's Choice Ltd. discloses compositions containing naturally-obtained plant extracts that contain naturally-obtained saponin material. The reference discloses that carrageenan may be employed as a thickening agent in the compositions.
The present invention seeks to improve upon the previously known cosmetic jellies.
Toddlers struggle to form healthy hand washing habits. If caregivers use a fun, effective cleanser on children from birth, the children will recall positive experiences with it, and will be inclined to wash their hands with it going forward. The moldable gel cleanser of the invention, which is in fun, sensory-rich formats, promotes healthy hand-washing habits.
This invention is a gel cleanser of a moldable format and texture having an amount of carrageenan effective to create an enriched sensory experience for the consumer. Further, the moldable gel cleanser is free of sulfates, so it is mild for babies and toddlers. The moldable gel cleanser has a gel matrix due to the presence of a potassium ion, and as such, the moldable gel cleanser has a gelatinous texture. The moldable gel cleanser contains glycol, which prevents sponginess, helps with the stability and structure of, and imparts a smooth surface to, the moldable gel cleanser.
According to a first aspect of the present invention there is provided a personal care product comprising:
Carrageenan acts as a gelling agent. The form of the moldable gel cleanser may differ depending on the amount of carrageenan in the product. The carrageenan can be a blend of carrageenan containing kappa carrageenan and iota carrageenan. Depending on the ratio of kappa carrageenan and iota carrageenan, different forms, textures, fix syneresis and freeze thaw stability are achieved.
To form a strong, durable multi-use jelly cleanser, preferably, the personal care product contains at least 1.5%, but less than 2.0% kappa carrageenan. Not having enough carrageenan will cause the moldable gel cleanser to crumble upon use, while having too much carrageenan will compress the gel matrix and make it less gelatinous, minimizing the sensory experience. Most preferably, the personal care product having this form contains 1.75% kappa carrageenan.
To form a crushable, single-use jelly cleanser having a crumble texture, preferably, the personal care product contains about 0.63% to about 0.75% kappa carrageenan. CaCl2) at 0.1%-0.5%, which makes kappa carrageenan brittle and crumbly, can be used to increase surface area post crush in the crumble form.
To form a Jell-O®-like jelly cleanser, preferably, the personal care product contains 1.5% to 2.0%, and more preferably 1.75%, carrageenan in a ratio of 50:50-75:25 iota carrageenan:kappa carrageenan. Iota carrageenan:kappa carrageenan in ratio of 75:25 results in a smooth jello texture. More preferably, the blend of carrageenan contains kappa carrageenan:iota carrageenan in a ratio of 0.88:2.62.
Preferably, the personal care product contains 0.25% to 1.0%, and more preferably 0.5%, of a source of potassium ion. Preferably, the source of potassium ion is potassium sorbate. The potassium sorbate also acts as preservative in the moldable gel cleanser of the invention.
Preferably, the personal care product contains 2.5% to 7%, more preferably 5% to 6%, glycol. Preferably, the glycol is butylene glycol. Glycol acts as a humectant in the moldable gel cleanser of the invention.
Preferably the personal care product also contains 10% to 30%, more preferably 15% to 25%, surfactant. Thus, according to another aspect of the present invention there is provided a personal care product comprising:
Preferably, the surfactant is a surfactant system that comprises sodium methyl cocoyl taurate, cocamidopropyl betaine and decyl glucoside. More preferably, the surfactant system comprises sodium methyl cocoyl taurate, cocamidopropyl betaine and decyl glucoside in a 1:2:1 (anionic:amphoteric:non-ionic) ratio. Decyl glucoside boosts foaming in the moldable gel cleanser of the invention.
According to another aspect of the present invention there is provided a method of manufacturing a personal care product comprising: a carrageenan, a source of potassium ion, a glycol, and, preferably, a surfactant.
According to another aspect of the present invention the surface area of the moldable gel cleanser can be maximized to enhance foaming and decrease slip.
The inventors hereof have discovered that the inclusion of carrageenan, potassium ions and glycol has a remarkable effect upon the consistency of the moldable gel cleanser.
The strong, durable multi-use form of the moldable gel cleanser of the present invention is particularly useful as a personal care product because it does not readily break-down in the way that a conventional cosmetic jelly does. It is therefore particularly suitable for use as a shower gel or body wash, where it can be applied in a somewhat similar fashion to a conventional bar of soap. All of the moldable gel cleanser forms are also suitable for use as, for example, a hair wash.
“Carrageenans” are linear sulfated polysaccharides that are extracted from red edible seaweeds. Carrageenans are chains of D-galactopyranosyl units joined with alternating α-1,3 and β-1,4 glycosidic linkages. There are three main varieties of carrageenan, which differ in their degree of sulfation. Kappa-carrageenan has one sulfate group per disaccharide, iota-carrageenan has two, and lambda-carrageenan has three.
“Flash foaming” refers to the foam formation behavior of a substance during foaming, i.e., the amount of foam produced dependent on time or energy input.
“Gel” is a soft, partially transparent semisolid substance.
“Gelling agent” is a substance added to a composition to provide the texture of a gel.
“Humectant” is a substance that retains moisture.
“Sulfate” is a salt that forms when sulfuric acid reacts with another chemical. It's a broader term for other synthetic sulfate-based chemicals that consumers may be concerned about, such as sodium lauryl sulfate (SLS) and sodium laureth sulfate (SLES). These compounds, which are produced from petroleum and plant sources such as coconut and palm oil, are found in cleaning and personal care products. The main use for SLS and SLES in products is to create lather.
“Surfactants” are compounds that lower the surface tension (or interfacial tension) between two liquids, between a gas and a liquid, or between a liquid and a solid. Surfactants may act as detergents, wetting agents, emulsifiers, foaming agents, and dispersants.
“Syneresis” is the contraction of a gel accompanied by the separation out of liquid.
It was observed that a combination of carrageenan and a source of potassium ions formed strong, clear, gels and was capable of supporting a surfactant system.
It was also observed that specific ratios of carrageenan types impact texture, syneresis, freeze/thaw stability, and crumbling.
It was also observed that a specific combination of surfactants enhances the cleansing aspects of the product (e.g., flash foaming, foam longevity, foam quality/density, mildness and skin afterfeel).
The present invention achieves a balance between appropriate foam profile, while remaining gentle and mild enough to leave skin soft and conditioned.
Embodiments of the present invention will now be described by way of further example only.
A moldable gel cleanser according to an embodiment of the present invention is formed from components in Table 1, wherein percentages are given by weight.
N/A7
N/A8
N/A9
N/A5
N/A6
N/A10
1All ingredients are in (wt %).
2See attached CP Kelco Product Data Sheet Genugel carrageenan CG-130 (2011).
3Genuviso CG-131.
4 Genu Gum type RL-60Z 0.525.
5Sodium Hydrolyzed Potato Starch Dodecenylsuccinate 2%.
6Potassium Cocoyl Glycinate 7.8%.
7Sodium Lauryl Sarcosinate 12%.
8Water; Cocamidopropyl Hydroxysultaine; Sodium Chloride 8%.
9Sodium Lauroyl Sarcosinate 5.3%
10Glucam E-10 Humectant 1%.
Each of the formulas were tested for a number of criteria to determine acceptability. Results are in Table 2 below.
A crushable, single use (crumble) moldable gel cleanser according to an embodiment of the present invention is formed from components in Table 3, wherein percentages are given by weight.
A Jell-O®-like moldable gel cleanser according to an embodiment of the present invention is formed from the components in Table 4, wherein percentages are given by weight.
A method of manufacturing a moldable gel cleanser according to the present invention and based upon the above stated groups of components is as follows:
The above stated method is an example only and may be varied depending on the specific components used.
The present inventors determined that:
Surfactants were tested. The results are shown in Table 5. As can be seen below, not all surfactants are compatible with the moldable gel cleanser of the invention.
Foam height testing is a valuable method to objectively quantify foaming performance. It is performed by a tumbling instrument to ensure reproducibility. This method involves inverting cylinders for 32 cycles with 90 g water and 10 g product. Data are collected after 2, 4, 8, 16 and 32 cycles.
More foam is preferred.
Flash foaming is important.
Cycles 2-8, 16-32.
Helpful to quantify cleanser performance.
1. Create batch and pour (2) semi-sphere samples, allow to fully cool.
2. Once cool, record masses.
EIT (epithelial irritation testing) can be used to assess if the systems are mild enough for use on infants and toddlers.
The following observations can be made to assess the aesthetics of the moldable gel cleanser:
It will be understood that, while various aspects of the present disclosure have been illustrated and described by way of example, the invention claimed herein is not limited thereto, but may be otherwise variously embodied according to the scope of the claims presented in this and/or any derivative patent application.
| Number | Date | Country | |
|---|---|---|---|
| 62806024 | Feb 2019 | US |
