RU2813707C2 - Gel-based plastic cleanser - Google Patents

Abstract

FIELD: personal hygiene.

SUBSTANCE: personal hygiene product contains carrageenan, a source of potassium ions, glycol, a surfactant system, the percentage of carrageenan by weight is from 1.5 to less than 2.0%; the surfactant system contains sodium methyl cocoyl taurate, cocamidopropyl betaine and decyl glucoside in a ratio of 1:2:1. A method of producing personal hygiene products is also disclosed.

EFFECT: group of inventions provides a gel-based cleanser in a plastic format.

7 cl, 5 tbl, 5 ex

Description

FIELD OF APPLICATION OF THE INVENTION

This invention relates to personal care products, in particular to a plastic gel-based cleanser having improved properties.

PREREQUISITES FOR CREATION OF THE INVENTION

Consumers enjoy foaming products for a variety of personal care applications, such as hair and body shampoos, facial cleansers and shaving gels. Foaming personal care products are pleasant to the touch. Consumers particularly like the high and dense foam, fast foaming, long-lasting lather and rich, luxurious creamy lather feel. To achieve these desired effects, surfactants are added to many personal care products. Surfactants play an important role in foaming agents by reducing the dynamic surface tension at the liquid-air interface, allowing gas bubbles to form or penetrate beneath the surface of the liquid. Surfactants also stabilize foam once it has formed. However, surfactants are not without their drawbacks. For example, certain surfactants such as sulfates, including alkyl sulfates and alkyl ether sulfates, are known to cause skin irritation.

It is known that cosmetic jellies can be obtained by mixing a surfactant with a seaweed extract. Such products are sold on the market but are not widely used, at least in part due to the properties of the jelly. Thus, known cosmetic jellies have a semi-liquid form, and when applied, for example, to the human body with water, they disintegrate to the consistency of a lumpy paste.

US Published Application No. 20080206273, issued to Cosmetic Warriors, Ltd., describes a cosmetic product that contains a surfactant, glycerin, monopropylene glycol, and optionally carrageenan. The link describes that the inclusion of monopropylene glycol mixed with glycerin affects the consistency of the jelly, resulting in the jelly having a firm and almost rubbery texture. The link also described unexpected effects if the jelly contained seaweed extract, as it was thought that such an extract would be destabilized by the presence of glycerol and monopropylene glycol. This US patent application, which corresponds to International Published Application No. WO2006067400, was rejected in 2010.

US Patent No. 9,028,872, issued to FMC Corporation, describes the foam, methods for its preparation and its use. The reference describes that the foam that can be used in personal care products is preferably a polysaccharide, and that examples of suitable polysaccharides for foam production include alginates, pectins, carrageenans, hyaluronates, chitosan, and mixtures thereof.

US Patent No. 10,064,881 issued to Y&B Mother's Choice Ltd. describes compositions containing natural plant extracts that contain naturally occurring saponin material. The reference discloses that carrageenan can be used in compositions as a thickening agent.

The purpose of this invention is to improve previously known cosmetic jellies.

SUMMARY OF THE INVENTION

Toddlers struggle to develop healthy handwashing habits. If caregivers use a fun and effective cleanser from birth, children will remember the positive experiences of using the product and be more inclined to wash their hands with it in the future. The flexible gel-based cleanser of the present invention, which comes in fun, sensory-rich formats, promotes healthy handwashing habits.

The present invention is a gel-based cleanser in a plastic format and texture containing an amount of carrageenan effective to provide a rich sensory experience to the consumer. Plus, the flexible, gel-based cleanser is sulfate-free, so it's gentle on babies and toddlers. The flexible gel cleanser has a gel matrix due to the presence of potassium ion and therefore the flexible gel cleanser has a gel-like texture. The flexible gel cleanser contains glycol, which prevents the formation of a spongy structure, promotes the stability and structure of the flexible gel cleanser, and gives it a uniform surface.

According to a first aspect, the present invention provides a personal care product comprising:

carrageenan;

source of potassium ions; And

glycol.

Carrageenan acts as a gelling agent. The form of the flexible gel cleanser may vary depending on the amount of carrageenan in the product. The carrageenan may be a carrageenan mixture containing kappa carrageenan and iota carrageenan. Depending on the ratio of kappa carrageenan to iota carrageenan, different shapes, textures, fixed syneresis and freeze-thaw stability are achieved.

Sturdy, durable, reusable shape

To provide a strong, stable, reusable gel cleanser, it is preferred that the personal care product contains at least 1.5% but less than 2.0% kappa carrageenan. Not having enough carrageenan causes the flexible gel cleanser to crumble when used, while too much carrageenan compresses the gel matrix and makes it less gel-like, minimizing sensory perception. Most preferably, the personal care product having this form contains 1.75% kappa carrageenan.

Destroyable mold for single use (crumb)

To provide a disintegrable, disposable jelly cleanser having a crumbly texture, it is preferred that the personal care product contains from about 0.63% to about 0.75% kappa carrageenan. CaCl ₂ at a concentration of 0.1-0.5%, which makes kappa carrageenan brittle and crumbly, can be used to increase the surface area after grinding into crumbs.

Jell-O®-like form

To formulate a jelly-like Jell-O®-like cleanser, it is preferred that the personal care product contains 1.5% to 2.0%, and more preferably 1.75%, carrageenan in an iota-carrageenan:kappa-carrageenan ratio of 50:50-75 :25. Iota Carrageenan: Kappa carrageenan in a 75:25 ratio produces a smooth jelly texture. More preferably, the carrageenan mixture contains kappa-carrageenan:iota-carrageenan in a ratio of 0.88:2.62.

Preferably, the personal care product contains from 0.25% to 1.0%, and more preferably 0.5%, of a potassium ion source. Preferably, the potassium ion source is potassium sorbate. Potassium sorbate also acts as a preservative in the flexible gel cleanser of the present invention.

Preferably, the personal care product contains from 2.5% to 7%, more preferably from 5% to 6% glycol. Preferably the glycol is butylene glycol. The glycol acts as a humectant in the plastic gel cleanser of the invention.

Preferably, the personal care product also contains from 10% to 30%, more preferably from 15% to 25% surfactant. Thus, according to another aspect, the present invention provides a personal care product comprising:

carrageenan;

source of potassium ions;

glycol; And

surface-active substance.

Preferably, the surfactant is a surfactant system that contains sodium methyl cocoyl taurate, cocamidopropyl betaine and decyl glucoside. More preferably, the surfactant system contains sodium methyl cocoyl taurate, cocamidopropyl betaine and decyl glucoside in a ratio of 1:2:1 (anionic: amphoteric: nonionic). Decyl glucoside enhances foaming in the flexible gel cleanser of the present invention.

According to another aspect, the present invention provides a method for producing a personal care product containing: carrageenan, a potassium ion source, glycol and, preferably, a surfactant.

In accordance with another aspect of the present invention, the surface area of the flexible gel-based cleanser can be maximized to improve foaming and reduce slip.

The present inventors have discovered that the inclusion of carrageenan, potassium ions and glycol significantly affects the consistency of the flexible gel cleanser.

The strong, durable form of the reusable plastic gel cleanser of the present invention is particularly useful as a personal care product because it does not break down as easily as conventional cosmetic jelly. It is therefore particularly suitable for use as a shower gel or body wash, where it can be used in a similar way to a regular bar of soap. All forms of flexible gel-based cleanser are also suitable for use, for example as a hair wash.

DETAILED DESCRIPTION OF THE INVENTION

DEFINITIONS

"Carrageenans" are linear sulfated polysaccharides extracted from red edible seaweed. Carrageenans are chains of D-galactopyranosyl units linked by alternating α-1,3 and β-1,4 glycosidic bonds. There are three main types of carrageenan, differing in the degree of sulfation. Kappa-carrageenan has one sulfate group per disaccharide, iota-carrageenan has two groups and lambda-carrageenan has three groups.

The term "rapid foaming" refers to the foaming characteristics during foaming, i.e. the amount of foam produced as a function of time or energy input.

"Gel" is a soft, partially transparent, semi-solid substance.

A "gelling agent" is a substance added to a composition to impart a gel texture.

The term "humectant" refers to a substance that retains moisture.

"Sulfate" is a salt that is formed by the reaction of sulfuric acid with another chemical. This is a broader term for other synthetic sulfate-based chemicals that may be of concern to consumers, such as sodium lauryl sulfate (SLS) and sodium laureth sulfate (SLES). These compounds, derived from petroleum and plant sources such as coconut and palm oils, are found in cleaning and personal care products. The main application of SLS and SLES in products is to create foam.

"Surfactants" are compounds that reduce the surface tension (or interfacial tension) between two liquids, between a gas and a liquid, or between a liquid and a solid. Surfactants can act as detergents, wetting agents, emulsifiers, foaming agents and dispersants.

“Syneresis” is the compression of the gel, accompanied by the release of liquid.

It has been noted that the combination of carrageenan and a potassium ion source forms strong, clear gels and is capable of supporting the surfactant system.

It has also been noted that specific ratios of carrageenan types affect texture, syneresis, freeze-thaw stability and crumbling.

It has also been noted that a particular combination of surfactants enhances the cleansing properties of the product (e.g., rapid lathering, lather longevity, lather quality/density, softness, and skin feel).

The present invention strikes a balance between the respective properties of the foam while maintaining a gentle and sufficiently gentle effect on the skin, which becomes soft and moisturized after use.

Embodiments of the present invention will be described below only by way of further example.

The plastic gel cleanser according to an embodiment of the present invention is prepared from the components shown in Table 1, where the percentage is given by weight.

Table 1 ¹

Formula → INCI NAME↓ 008 009 012 020 022 026 029 030 031 061 117 119 120 172 Water 61.9 63.65 56.4 60.35 66,725 65.48 61.3 62.3993 68.4 68.05 60.26 60.26 62.26 58.25965 Sodium benzoate 0.5 0.5 0.5 0.5 0.5 N/A 0.5 0.5 0.5 0.5 N/A N/A N/A N/A Potassium sorbate 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Glycerol 6 5 5 6 6 6 6 6 6 6 6 6 8 8 Carrageenan extract (Genugel CG-130 ² ) 1.75 1.75 1.75 1.75
0.8 Iota ³ 1.75 1.75 1.75 1.75 1.75 1.75 1.75 1.225 ⁴ 1.75 1.75 Sodium methyl cocoyl taurate 9.7 7.3 15 15 7.3 5.42 7.3 7.3 N/A ⁵ N/A ⁶ 8.85 8.85 8.85 8.85 Cocamidopropyl betaine 13.3 15 N/A ⁷ N/A ⁸ 10 11.6 10 10 10 N/A 12.14 12.14 12.14 12.14 Decyl glucoside N/A N/A N/A 3.25 N/A 3.25 N/A ⁹ 3.5 3.5 9.3 4.5 4.5 4.5 4.5 Ethylhexylglycerin; Phenoxyethanol 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 Butylene glycol 5 5 5 6 6 5 5 6 6 5 5 5 N/PN1 5 Flavoring 0.5 0.3 1 0.5 0.5 0.3 0.5 0.5 0.5 0.5 0.3 0.3 0.1 0.3 Dye N/A 2 2 N/A N/A N/A N/A 0.0007 N/A N/A N/A N/A N/A 0.00035 50% citric acid solution 0.25 0.1 0.25 N/A 0.125 0.1 0.25 0.95 0.25 N/A 0.1 0.1 0.1 0.1 Total 100 100 100 100 100 100 100 100 100 100 100 100 100 100

¹ All ingredients are given in (wt.%)

² See attached Product Data Sheet CP Kelco Genugel carrageenan CG-130 (2011).

³ Genuviso CG-131.

⁴ Genu gum type RL-60Z 0.525.

⁵ Sodium hydrolyzed potato starch dodecenyl succinate 2%.

⁶ Potassium cocoylglycinate 7.8%.

⁷ Sodium lauryl sarcosinate 12%

⁸ Water, cocamidopropylhydroxysultaine; Sodium chloride 8%

⁹ Sodium lauroyl sarcosinate 5.3%

¹⁰ Humidifier Glucam E-10 1%.

To determine acceptability, each of the formulas was tested against a number of criteria. The results are presented below in Table 2.

table 2

Formula No. Combinations and ratios of surfactants Trade names % kappa carrageenan Tradename % of other polymer and trade name Formed gel matrix, capable of being poured and molded (test pass/fail) Compliance with aesthetic application criteria (test pass/test fail) Minimum foam height threshold met (pass/fail) (380 ml) 008 1:2 SMCT: CAPB Adinol CT24-LQ-(RB), TEGO Betain F 50 1.75 Genugel CG-130 N/A Test passed Test passed N/A 009 1:3 SMCT: CAPB Adinol CT24-LQ-(RB), TEGO Betain F 50 1.75 Genugel CG-130 N/A Test passed Test passed N/A 012 1:1 SMCT: sarcosinate Adinol CT24-LQ-(RB), Crodasinic LS30 1.75 Genugel CG-130 N/A Test passed Test passed N/A 020 1:1 SMCT: CAPHS Adinol CT24-LQ-(RB), Mirataine CBS 1.75 Genugel CG-130 I-Carrageenan, 0.8, Genuvisco CG-131 Test passed Test passed Test passed 022 2:1 SMCT: CAPHS Adinol CT24-LQ-(RB), Mirataine CBS 1.75 Genugel CG-130 N/A Test passed Test passed N/A 026 1:3:1 SMCT: CAPB: DG Adinol CT24-LQ-(RB), TEGO Betain F 50, Plantaren 2000 1.75 Genugel CG-130 N/A Test passed Test passed Test passed 029 1:1:2 SMCT: sarcosinate: CABP Adinol CT24-LQ-(RB), Crodasinic LS30, Plantaren 2000 1.75 Genugel CG-130 N/A Test passed Test passed Test passed 030 1:2:1 SMCT: CAPB: DG Adinol CT24-LQ-(RB), TEGO Betain F 50, Plantaren 2000 1.75 Genugel CG-130 N/A Test passed Test passed Test passed 031 1:2:1 PS-111: CAPB: DG Structure PS-111, TEGO Betain F 50, Plantaren 2000 1.75 Genugel CG-130 N/A Test passed Test passed N/A 061 1:2 PC Glycinate Amilite GCK 12H 1.75 Genugel CG-130 N/A test failed test failed N/A 117 1:2:1 SMCT: CAPB: DG Adinol CT24-LQ-(RB), TEGO Betain F 50, Plantaren 2000 1.75 Genugel CG-130 N/A Test passed Test passed Test passed 119 1:2:1 SMCT: CAPB: DG Adinol CT24-LQ-(RB), TEGO Betain F 50, Plantaren 2000 1.225 Genugel CG-130 Carob bean gum (Genu Gum RL 200Z CG) 0.525% Test passed test failed N/A 120 1:2:1 SMCT: CAPB: DG Adinol CT24-LQ-(RB), TEGO Betain F 50, Plantaren 2000 1.75 Genugel CG-130 N/A Test passed test failed N/A

The disintegrating (crumbling) disposable gel-based cleanser according to an embodiment of the present invention is prepared from the components shown in Table 3, where the percentage is given by weight.

Table 3: Crumb 1:2:1 SMCT:CAPB:DG crumb 8% glycerol

INCI name (USA) Percentage Water 59.32965 Potassium sorbate 0.5 Glycerol 8 Genugel CG-130 0.68 sodium methyl cocoyl taurate; Water 8.85 Cocamidopropyl betaine 12.14 Decyl glucoside 4.5 Ethylhexylglycerin; Phenoxyethanol 0.6 Butylene glycol 5 Flavoring 0.3 Red dye Red 40 0.00035 Lemon acid 0.1

The plastic Jell-O®-like gel cleanser according to an embodiment of the present invention is prepared from the components shown in Table 4, where the percentage is given by weight.

Table 4

INCI name (USA) Percentage Water 61.85 Sodium benzoate 0.5 Potassium sorbate 0.5 Glycerol 6 Carrageenan Genugel CG-130 0.88 Satiagel VPC 508 (Cargill, iota-carrageenan) 2.62 sodium methyl cocoyl taurate; Water 7.3 Cocamidopropyl betaine 10 Decyl glucoside 3.5 Ethylhexylglycerin; Phenoxyethanol 0.6 Butylene glycol 5 Flavoring 0.5 Calcium chloride 0.75

The method for producing a plastic gel-based cleanser according to the present invention based on the above-mentioned groups of components is as follows:

1. Add 100% purified water at room temperature and begin mixing.

2. Add sodium benzoate (if present in the formula) and stir until completely dissolved.

3. Add potassium sorbate and stir until completely dissolved.

4. Add glycerin and mix until smooth.

5. Heat to 80-85 °C.

6. Add Genugel GC-130 and mix until smooth.

7. Add sodium methyl cocoyl taurate (or substitute) at 80 °C and mix until smooth.

8. Add cocamidopropyl betaine (if present in the formula or its substitute) and mix until smooth.

9. Add decyl glucoside (if present in the formula) and mix until smooth.

10. Cool to 65 °C.

11. Add ethylhexylglycerin; phenoxyethanol and stir until smooth.

12. Add the dye solution drop by drop until the desired shade is obtained.

13. Use citric acid to adjust the pH to 5.5-5.7.

14. If necessary, pour the solution into the mold.

The above method is only an example and may be modified depending on the specific components used.

The inventors of the present invention have determined that:

Carrageenan forms hard jellies.

Potassium sorbate is a good preservative/crosslinking agent.

1.5-2% kappa carrageenan works well in strong, durable, refillable and Jell-O® forms.

1.75% Kappa Carrageenan works best in strong, durable, refillable and Jell-O® forms.

Glycinates are incompatible, as has been demonstrated using potassium cocoylglycinate.

Iota-carrageenan alone is not enough. A mixture of iota carrageenan and kappa carrageenan works well.

PEG-80 and any polyethoxylated chemicals are not compatible with carrageenan.

The optimal carrageenan ratio for the iota/kappa mixture is 0.88:2.62.

Example

Surfactants were tested. The results are presented in Table 5. As can be seen below, not all surfactants are compatible with the flexible gel cleanser of this invention.

Table 5

Surface-active substance results Sodium methyl cocoyl taurate (SMCT) Optimal foaming and density Sodium lauryl sarcosinate Fast foaming is lower compared to SMCT Cocoylglycinate K/Na Incompatible with carrageenan PS-111 Foam booster Sodium cocoyl isethionate Incompatible with carrageenan Cocamidopropyl betaine Best fast foaming/quality Cocamidopropylhydroxysultaine Foam too thick/creamy Disodium amphodiacetate Amphoacetates are incompatible with carrageenan Sodium lauroamphoacetate Amphoacetates are incompatible with carrageenan Decyl glucoside Enhances foaming, increases softness PEG-80 sorbitan laurate Polyethoxylation is incompatible with carrageenan Cocoglucoside Lower compared to decyl glucoside

Example

Foam height

The foam height test is a valuable way to objectively quantify foam performance. It is performed using a rotating instrument to ensure reproducibility. This method involves inverting the cylinders for 32 cycles with 90 g of water and 10 g of product. Data are collected after 2, 4, 8, 16 and 32 cycles.

Preference is given to producing more foam.

Fast foaming is important.

Cycles 2-8, 16-32.

Suitable for quantifying the effectiveness of a cleanser.

Example

Method for studying syneresis

1. Create a batch of product and fill in hemispherical samples (2), leave until completely cooled.

2. After cooling, record the masses.

a. For tests carried out outdoors, proceed to steps 3-11.

b. When testing in a closed space, proceed to step 12.

3. Take one standard medical spatula and record its weight.

4. Push the spatula through one of the jelly so that the stick is parallel to the flat side of the hemisphere.

5. Record the mass of jelly + stick.

6. The spatula is placed on the neck of a 400 ml beaker so that the jelly is suspended in the air.

7. Record the current time.

8. After 24 hours, record the weight of the sample + rod.

9. After 48 hours, record the weight of the sample + rod.

10. After 72 hours, record the mass of the sample + rod.

11. After 3 days, calculate the % of weight lost per day.

12. Take an 8 ounce container and record the mass.

13. Add the jelly to the container, flat side down.

14. After 24 hours, remove the jelly without turning the vessel over.

15. Dry completely and measure the mass.

16. After 48 hours, remove the jelly without turning the vessel over.

17. Dry completely and measure the mass.

18. After 72 hours, remove the jelly without turning the vessel over.

19. Dry completely and measure the mass.

20. After 3 days, calculate the % of weight lost per day.

Example

EIT testing

The EIT (Epithelial Irritation Test) can be used to evaluate whether systems are gentle enough for use in infants and toddlers.

Example

To evaluate the aesthetic qualities of a plastic gel-based cleanser, the following observations can be made:

Foam quality

Foam Density

Foaming speed

Drying

Quick rinsing after application

Remainder

Texture

It should be understood that while various aspects of the present specification have been illustrated and described by way of examples, the invention claimed herein is not limited thereto, but may be practiced in various other manners within the scope of the claims included herein and/or any related application herein. for a patent.

References

CPKelco GENU® Carrageenan Book (2002), http://www.bisi.cz/cmsres.axd/get/cms$7CVwRhc3USVqgzxkKF96gI$2BChNrXcTq$2BOUdiEtz5TfYA$2Fg1ADRHMfXfdEjUsYQagqUs9N6byPOkok$3D .

T.R.Thrimawithana et al., Texture and rheological characterization of kappa and iota carrageenan in the presence of counter ions, Carbohydrate Polymers, Volume 82, Issue 1, 2 August 2010, Pages 69-77,

https://doi.org/10.1016/j.carbpol.2010.04.024 and https://www.sciencedirect.com/science/article/pii/S0144861710002894.

Shimadzu Evaluation of Jelly Strength (Bloom Value),

https://www.shimadzu.com/an/industry/foodbeverages/n9j25k00000dqazu.htm.

M. J. Hernández et al., Viscous Synergism in Carrageenans (κ and λ) and Locust Bean Gum Mixtures: Influence of Adding Sodium Carboxymethylcellulose,

https://journals.sagepub.com/doi/abs/10.1106/6BCX-6XH6-PT82-8WCK.

“Kappa carrageenan, Potassium salt form: Gels, face masks, shower gels, emulsions: Forms firm and brittle gels, CP Kelco Best Choice Guidelines (2012), https://www.cpkelco.com/wp-content/uploads/2012 /08/FoodCatalog.pdf . See also the publication CP Kelco Sensorial pleasures from nature-based ingredients, https://www.in-cosmetics.com/RXUK/RXUK_InCosmetics/2014-website/Documents/CP%20Kelco%20presentation_final.pdf?v=635340307802890491 .

Cargill Beauty Unleashing Nature Sustainably,

Claims (17)

1. Personal hygiene product containing: carrageenan; source of potassium ions; glycol; And surfactant system; characterized in that the percentage of carrageenan by weight is from 1.5 to less than 2.0% and that the surfactant system contains sodium methyl cocoyl taurate, cocamidopropyl betaine and decyl glucoside in a ratio of 1:2:1. 2. The personal care product according to claim 1, wherein the carrageenan is kappa carrageenan. 3. Personal hygiene product according to claim 2, in which the percentage of kappa-carrageenan by weight is 1.75%. 4. The personal care product according to claim 1, wherein the percentage of potassium ion source by weight is from 0.25 to 1.0%. 5. Personal hygiene product according to claim 1, in which the percentage of glycol by weight is from 2.5 to 7.0%. 6. The personal care product according to claim 1, which is a plastic gel-based cleanser in a form selected from the group consisting of a reusable jelly cleanser that contains at least 1.5% but less than 2.0 % kappa-carrageenan; a disintegrable jelly cleanser for one-time use that contains from 0.63 to 0.75% by weight kappa carrageenan; and a jelly cleanser that contains 1.5 to 2.0% by weight of carrageenan in an iota-carrageenan:kappa-carrageenan ratio of 50:50-75:25. 7. A method for obtaining personal hygiene products according to claim 1, including the following steps: choice of carrageenan; selection of potassium ion source; glycol selection; And choice of surfactant system; mixing the carrageenan, potassium ion source, glycol and surfactant system until smooth to obtain the specified product.