WO2021007741A1

WO2021007741A1 - Aqueous-based non-aerosol dry shampoo composition

Info

Publication number: WO2021007741A1
Application number: PCT/CN2019/095961
Authority: WO
Inventors: Yulan HU; Xiaowei Chang
Original assignee: Henkel Ag & Co. Kgaa
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2021-01-21

Abstract

An aqueous-based non-aerosol dry shampoo composition consists of (A) 0.1 to 30%of silicone elastomer powder by weight; and (B) 5 to 98.3% of water by weight, each based on the total weight of the dry shampoo composition. Such dry shampoo compositions have one or more properties of excellent oil absorbing effect, safe and sustainable, long-lasting perfume, quickly dry characteristic, hair conditioning and smoothness, and leaving less residue than conventional products.

Description

Aqueous-based Non-Aerosol Dry Shampoo Composition

Technical field

The present invention relates to a dry shampoo composition, particularly, relates to an aqueous-based non-aerosol dry shampoo composition.

Background of the invention

In the field of hair cleansing, dry shampoos have existed for many years, either in a powdery form or in aerosol form. Dry shampoos can be employed with no water and they can remove contamination from the hair quickly. Generally, dry shampoos contain carrier material, due to its adsorption properties, when the hair is combed or brushed after the dry shampoo has been applied, the adsorbed impurities are removed from the hair along with the carrier materials.

Starches or modified starches are primarily used as carrier materials in dry shampoos. However, in practice, the proposed dry shampoos are not completely satisfactory. Their styling properties, such as the provision of volume to the head of hair, are normally limited and they often leave white residues on the hair. To improve such properties, the patent KR20130114986 disclosed a dry shampoo composition consisting of silicone elastomer powder in replace of starch as contamination-removing powder to solve such problems. This is a formula without water. US2015/0139917A1 disclosed that a dry shampoo composition consisting of silicone elastomer powder may contain water, but it would less than 5%by weight of water relative to total weight of the composition, and it was preferentially said to be anhydrous.

Dry shampoos currently on the market can have various disadvantages. They only partially meet consumer’s need. Most of them are targeted in aerosol format or no silicone elastomer powder. Some may have unsatisfactory capacity to absorb oil or give rise to unsightly white residues in the hair. Further still, the aerosol spray containing propellant is a conventional packaging form for most of dry shampoos on the market. However, the propellant is usually alkanes and liquid alkanes which are not only have low toxicity but also insecure and not sustainable.

Therefore, there is thus a need to develop an aqueous formulation which not only can achieve both excellent cleansing function and caring property, but also is safe and sustainable without using propellant.

Summary of the invention

The present invention is to provide an aqueous-based non-aerosol dry shampoo composition having one or more properties of excellent oil absorbing effect, safe and sustainable, long-lasting perfume, quickly dry characteristic, hair conditioning and smoothness, and leaving less residue than conventional products, preferably having all the above properties.

After intensive studies, the inventors have found that an aqueous-based non-aerosol dry shampoo comprising: (A) 0.1 to 30wt %of silicone elastomer powder; and (B) 5 to 98.3wt%of water can solve above problems.

In the present invention, the silicone elastomer powder (A) is dimethicone/vinyl dimethicone crosspolymer modified with hydrophilic agents.

In the present invention, the hydrophilic agents are one or more alcohols, preferably selected from 1, 3-butaneddiol, 1, 2-propanediol, 1, 3-propanediol, glycerin, 1, 10-decanediol, 1, 2-butanediol, 1, 2-hexanediol, pentylene glycol, propanediol, 1, 4-butanediol 1, 5-pentanediol, hexanediol, 2, 3-butanediol, 3-hexenol and other kinds of alcohols allowed to be used in cosmetics.

In the present invention, the composition further comprises (C) alcohol, (D) humectant, (E) fragrance oil and (F) preservative.

The advantages of the aqueous-based non-aerosol dry shampoo composition include that:

- It is featured with non-aerosol format by selecting silicone elastomer powder as its main component, which offers an oil absorbing characteristic, and then delivers smoothness on hair, and contributes to hair dry combing performance. Additionally, the special skeleton structure of silicone elastomer powder has proven to bring long-lasting perfume property to the dry shampoo composition described herein.

- Compared to traditional formats, it contains a large proportion of water to moisturize hair, furthermore it also makes the format simple and plain to reduce the manufacturing cost.

- No propellant is comprised in the format without derogating its spray uniformity, which also renders safety, stability and sustainability to the composition. Therefore, it can be easily carried with and can be brought to the flight.

- It can be processed to prepare the formulation at the room temperature.

- Alcohol further offers quickly dry characteristic to the composition.

Detailed description of the invention

It is to be understood by one of ordinary skill in the art that the present invention is a description of exemplary embodiments only and is not intended as limiting the broader aspects of the present invention. Each aspect so described may be combined with any other aspect or aspects unless clearly indicated to the contrary. Any feature indicated as being preferred or advantageous may be combined with any other feature or features indicated as being preferred or advantageous.

Unless specified otherwise, in the context of the present invention, the terms used are to be construed in accordance with the following definitions.

Unless specified otherwise, all wt. %or %by weight values quoted herein are percentages by weight based on total weight of the aqueous-based non-aerosol dry shampoo composition.

Unless specified otherwise, as used herein, the terms “a” , “an” and “the” include both singular and plural referents.

The terms “comprising” and “comprises” as used herein are synonymous with “including” , “includes” or “containing” , “contains” , and are inclusive or open-ended and do not exclude additional, non-recited members, elements or process steps.

Unless specified otherwise, the recitation of numerical end points includes all numbers and fractions subsumed within the respective ranges, as well as the recited end points.

All references cited in the present specification are hereby incorporated by reference in their entirety.

Unless otherwise defined, all terms used in the present invention, including technical and scientific terms, have the meaning as commonly understood by one of the ordinary skilled in the art to which this invention belongs.

The present application therefore addresses the problem of furnishing a dry shampoo with a high oil adsorption capacity and good application in the form of non-aerosol spray, which enables a dry shampoo formulation to deliver in a safe and stable way by using a spray mist through conventional small diameter pump spray nozzles. This problem was solved using a novel formulation in an aqueous dispersion system. According to the present invention, an aqueous-based non-aerosol dry shampoo comprising: (A) 0.1 to 30wt %of silicone elastomer powder; and (B) 5 to 98.3wt%of water can solve above problems.

(A) Silicone Elastomer Powder

One essential element as contemplated herein is silicone elastomer powder which is the oil absorbing agent. Silicone elastomer powder is a spherical powder in which primary particles are in the range of 2-15 μm. Because the silicone elastomer powder has a dimethylsiloxane backbone in the molecule, it has excellent properties in that no sticky feeling is generated and it can combine contamination.

The silicone elastomer powder can be obtained especially by polymerization of organopolysiloxane containing at least two hydrogen atoms each bonded to a silicon atom and of an organopolysiloxane comprising at least two ethylenically unsaturated groups (especially two vinyl groups) in the presence of a platinum catalyst.

The silicone elastomer powder can be dimethicone/vinyl dimethicone crosspolymer modified with hydrophilic agents, which renders silicone elastomer powder to be stably existed in an aqueous system in this present invention. Preferably, the hydrophilic treatment agent can be chosen from 1, 3-butaneddiol, 1, 2-propanediol, 1, 3-propanediol, glycerin, 1, 10-decanediol, 1, 2-butanediol, 1, 2-hexanediol, pentylene glycol, propanediol, 1, 4-butanediol 1, 5-pentanediol, hexanediol, 2, 3-butanediol, 3-hexenol and other kinds of alcohols allowed to be used in cosmetics. Even so, the silicone elastomer powder is insoluble in water, but it can be employed to hair together homogenously with water in the form of spay mist.

Suitable silicone elastomer powders are manufactured by the company Dow Silicones Corporation of the United States (Dow Silicones) sold under the trade name DOWSIL ^TM EP-9801 as materials. INCI (International Nomenclature of Cosmetic Ingredients) name of material is Dimethicone/Vinyl Dimethicone Crosspolymer and/or Silica, Butylene Glycol. The DOWSIL ^TM EP-9801 consists of dimethyl siloxane crosslinked polymer, amorphous fumed silica, 1, 3-butaneddiol, polyoxyethylene isocetyl ether and Vitamin E.

The silicone elastomer powder (A) used in the present invention is not particularly limited, as long as it is modified with the hydrophilic agent and the objective of aqueous silicone elastomer powder (A) system described herein can be obtained.

For the effect of oil absorbing and applicability, it has proven advantageous for weight proportion of the silicone elastomer powder, relative to the total weight of the composition, to be limited to values from 0.1 to 30wt%and more preferably from about 10 to 30wt%, such as 10wt%, 15wt%, 18wt%, 20wt%, 25wt%, 30wt%.

(B) Water

Water (B) is another main component of the present composition invention. It has been surprisingly found that water can be existed and incorporated other components such as silicone elastomer powder in dry shampoo composition described herein. This contrasts with some previously known dry shampoo compositions, where a range of commercial products are anhydrous. The water presents in a dry shampoo composition according to the present technology in an amount from 5%to 98.3wt%, preferably from 40wt%to 80wt%, such as 43.7wt%, 70wt%and 73wt%.

Other Components

In some embodiments, a composition according to the present technology may comprise alcohol (C) as to render quick dry characteristic to the hair. If present, the alcohol may be present in a dry shampoo composition according to the present technology in an amount not more than 65wt%, preferably 10wt%to 25wt%, such as 10wt%, 15wt%and 25wt%.

In some embodiments, a composition according to the present technology may comprise humectant (D) . Humectant can be selected from polyol, biopolymer such as hyaluronic acid, polyethylene glycol, amino acid, moisturizing extract such as aloe barbadensis extract and other kinds of humectant commonly used in cosmetics, which is available from Exsymol, Kerry, ECEM. If present, the humectant may be present in a dry shampoo composition according to the present technology in an amount of not more than 23.5wt%, more preferably not more than 1wt%.

The composition according to the present technology comprises fragrance oil (E) . The incorporation of fragrance oil is well established and those of skill in the art would routinely be able to select a suitable fragrance or combination of fragrances to achieve the desired odor. In some embodiments, the fragrance oil is aroma chemical selecting from groups consisting of hydrocarbons, alcohols, acids, esters, lactones, aldehydes, ketones, phenols, ethers, acetals, ketals, radicals, macrocycles, polycycles, heterocycles (pyrazines, pyridines, furosethiazoles, etc. ) , sulfides and halides and other kinds of aroma chemicals commonly used in cosmetics. Examples of suitable fragrances include aromatic spices such as phenylethanol, vanillin, eugenol; terpenoid perfumes and heterocyclic aroma substances (all of which are INCI names) . Fragrance oil is available from Firmenich, Symrise, IFF, Givaudan.

The fragrance oil is present in a dry shampoo composition according to the present technology in an amount of 0.1 to 1.5wt%, preferably in an amount of 0.1 to 0.3wt%.

In some embodiments, the composition according to the present technology may comprise preservative (F) . In some embodiments, the preservative is selected from benzoic acids and its salts and esters, 4-Hydroxybenzoic acids and its salts and esters, 2-phenoxyethanols, sorbic acids (hexa-2, 4-dienoic acids) and its salts and other kinds of preservatives commonly used in cosmetics, which is available from Schulke &Mayr, Clariant, BASF etc. In some embodiments, the dry shampoo composition may not contain preservative (F) if the content of alcohol (c) is more than 15wt%, because such content of alcohol can protect composition from microorganism breeding and contamination.

The preservative is present in a dry shampoo composition according to the present technology in an amount no more than 1.2%by weight.

According to another aspect, the present technology provides a product comprising a dry shampoo composition of the present technology and a spray bottle adapted to deliver the dry shampoo composition.

In another aspect, the present technology provides a method of cleaning the hair, which comprises applying a dry shampoo composition of the present technology to the hair.

In yet another aspect of the present invention, provided is a processing method in room temperature for manufacturing the dry shampoo composition including the steps of:

I. Transporting the mixture of alcohol (C) and fragrance oil (E) or fragrance oil (E) , into the silicone elastomer powder (A) ;

II. Mixing the silicone elastomer powder (A) together with the mixture of alcohol (C) and fragrance oil (E) or only fragrance oil (E) without alcohol (C) to disperse homogeneously;

III. Adding preservative (F) and humectant (D) successively into the mixture obtained from II; and

IV. Adding water (C) into the mixture obtained from III and stir until evenly dispersed.

Examples

The following examples are intended to assist one skilled in the art to better understand and practice the present invention. The scope of the invention is not limited by the examples but is defined in the appended claims. All parts and percentages are based on weight unless otherwise stated.

Examples 1 to 6

A variety of dry shampoo compositions were prepared using ingredients in amounts (by weight) listed in the Table 1 follows by the manufacture method as below:

Example 1

0.1wt%fragrance oil and 0.1wt%dimethicone/vinyl dimethicone crosspolymer powder modified with 1, 3-butaneddiol was mixed with agitation until the mixture is homogeneous (Group 1) . 0.3wt%humectant (polyols) and 1.2wt%preservative (benzoic acid) was added successively into Group 1 to disperse well (Group 2) . Lastly added 98.3wt%water into Group 2 and stirred until evenly dispersed.

Example 2

0.3wt%fragrance oil was premixed with 10wt%alcohol before adding into 5wt%dimethicone/vinyl dimethicone crosspolymer powder modified with 1, 2-butanediol with agitation until the mixture is homogeneous (Group 1) . 1wt%humectant (hyaluronic acid) and 1.2wt%preservative (4-hydroxybenzoic acid) was added successively into Group 1 to disperse well (Group 2) . Lastly added 82wt%water into Group 2 and stirred until evenly dispersed.

Example 3

0.3wt%fragrance oil was premixed with 10wt%alcohol before adding into 8.5wt%dimethicone/vinyl dimethicone crosspolymer powder modified with pentylene glycol with agitation until the mixture is homogeneous (Group 1) . 1.2wt%preservative (sorbic acid) was added into Group 1 to disperse well (Group 2) . Lastly added 85wt%into Group 2 and stirred until evenly dispersed.

Example 4

0.3wt%fragrance oil was premixed with 15wt%alcohol before adding into 10wt%dimethicone/vinyl dimethicone crosspolymer powder modified with 2, 3-butanediol with agitation until the mixture is homogeneous (Group 1) . 1.2wt%preservative (2-phenoxyethanol) was added into Group 1 to disperse well (Group 2) . Lastly added 73wt%water into Group 2 and stirred until evenly dispersed.

Example 5

0.1wt%fragrance oil was premixed with 25wt%alcohol before adding into 30wt%dimethicone/vinyl dimethicone crosspolymer powder modified with 1, 5-pentanediol with agitation until the mixture is homogeneous (Group 1) . 1.2wt%preservative (benzoic acid) was added into Group 1 to disperse well (Group 2) . Lastly added 43.7wt%water into Group 2 and stirred until evenly dispersed.

Example 6

1.5wt%fragrance oil was premixed with 65wt%alcohol before adding into 5wt%dimethicone/vinyl dimethicone crosspolymer powder modified with 3-hexenol with agitation until the mixture is homogeneous (Group 1) . 23.5wt%humectant (amino acid) was added into Group 1 to disperse well (Group 2) . Lastly added 5wt%water into Group 2 and stirred until evenly dispersed.

Comparative Composition

Comparative composition EX’ is a typical commercial dry shampoo consisting of starch, oryza sativa, butane, propane, isobutane, pentane, dimethylsilyl alkylate silica, fragrance oil, alcohol and water, which was purchased from Henkel under the trade name of

The oil absorption effect and other properties of the above compositions of the present invention were studied by the following tests.

Test Methods:

Test on Hair Strands

The effect of oil-absorbing as well as other performance properties such as greasy feeling, cleaning feeling, dry speed, dry hair feeling after applications, hair gloss, smoothness, residue etc. were tested by spraying the compositions of this present invention (Table 1) and the comparative composition onto the greasy hair strands treated by sebum. Table 2 shows the average score of three people’s assessment result on each performance indicator for composition EX’ , EX1～EX6 follows by the rule as below:

- 6: Very good

- 5: Good

- 4: Slightly good

- 3: Slightly bad

- 2: Bad

- 1: Very bad.

It can be easily understood that the oil absorption property improves as an increase of the amount of silicone elastomer powder. However, an excess of silicone elastomer powder results in much more residue on the hair than it is normal used to be. After intensive studies, the inventors have found that the oil absorption property remains to be steady with 30wt%of silicone elastomer powder.

It can be seen from Fig. 1, Fig. 2 and Fig. 3 that after applying to composition EX5 of this invention, the hair strands appear to be less oily, much cleaner and smoother than that before. Using Scanning Electron Microscope (SEM) imaging taken on (1) hair without any treatment (Fig. 4) , (2) the greasy hair (Fig. 5) , (3) hair treated by the most preferable composition EX5 of this invention (Fig. 6) , and (4) hair treated by comparative composition (Fig. 7) as a result of the comparison. It can be found that composition of this invention absorbed most of sebum on hair, and less residue were left on hair than that treated by the comparative composition.

Performance Blind Test on Real Head

Composition EX5 was tested by a panel of testers who assessed them on performance indicators such as dry speed, dry hair feeling after applications, greasy feeling, cleaning feeling, hair gloss, smoothness, residue etc. Each tester with oily scalp were conducted a so-called “half head and blind test” , meaning tester’s half head was applied by dry shampoo composition EX5 of this invention and the other half head was applied by the comparative composition. The shampoo application amount was 2g, 3g and 4g for short hair, medium hair and long hair respectively. A brief description of the selected testers’ hair condition was presented in Table 3. The testing result was recorded in the Table 4. Each tester scored for every performance indicator by rules as below:

- 6: Very good

- 5: Good

- 4: Slightly good

- 3: Slightly bad

- 2: Bad

- 1: Very bad.

As can be seen from Table 4, the dry shampoo of the present invention (EX5) shows better dry hair feeling after application, cleaner feeling when looking, cleaner touching when touching, better scalp feeling, less residue and more smoothness compared with the comparative composition.

Fragrance Oil’s Olfactive Test

The scent lasting time of composition EX4 containing 0.3wt%fragrance oil was tested through an olfactive test conducted by professional perfumer from

Specifically, hair strands were sprayed for 2 seconds with the respective composition (EX4) and controlling composition respectively, and then perfumers evaluated and recorded the Olfactive Strength Scale at different time point based on the standard defined as below:

- 1: Very week;

- 2: Week;

- 3: Neither week nor strong;

- 4: Strong;

- 5: Very strong.

It shows good performance in both leave on base, especially in the sample of composition of this invention. The full character is very preformistic and well accepted, and the perfume can even last till 48hr.

Although some preferred embodiments have been described, many modifications and variations may be made thereto considering the above teachings. It is therefore to be understood that the invention may be practiced otherwise than as specifically described without departing from the scope of the appended claims.

Table 1:

In this table, Ex 1 to Ex 6 show representative dry shampoo compositions of the present invention. All amounts are expressed in wt. %.

Table 2

Table 3

Table 4

Table 5

Claims

An aqueous-based non-aerosol dry shampoo composition comprises:

(A) 0.1 to 30%of silicone elastomer powder by weight; and

(B) 5 to 98.3%of water by weight, each based on the total weight of the dry shampoo composition.
The composition of claims 1, wherein the silicone elastomer powder (A) is dimethicone/vinyl dimethicone crosspolymer modified with hydrophilic agents.
The composition of claim 1 or 2, wherein the hydrophilic agents are one or more alcohols, preferably selected from 1, 3-butaneddiol, 1, 2-propanediol, 1, 3-propanediol, glycerin, 1, 10-decanediol, 1, 2-butanediol, 1, 2-hexanediol, pentylene glycol, propanediol, 1, 4-butanediol 1, 5-pentanediol, hexanediol, 2, 3-butanediol and 3-hexenol.
The composition of any one of claims 1 to 3, wherein the composition further comprises (C) alcohol.
The composition of any one of claims 1 to 4, wherein the composition further comprises (D) humectant, preferably selected from polyol, biopolymer, polyethylene glycol, amino acid and moisturizing extract.
The composition of any one of claims 1 to 5, wherein the composition further comprises (E) fragrance oil, preferably selected from groups consisting of hydrocarbons, alcohols, acids, esters, lactones, aldehydes, ketones, phenols, ethers, acetals, ketals, radicals, macrocycles, polycycles, sulfides and halides, aromatic spices, terpenoid perfumes and heterocyclic aroma substances.
The composition of any one of claims 1 to 6, wherein the composition further comprises (F) preservative, preferably selected from benzoic acids and its salts and esters, 4-hydroxybenzoic acids and its salts and esters, 2-phenoxyethanols, and sorbic acids and its salts.
The composition of any one of claims 1 to 7, wherein the silicone elastomer powder (A) is comprised in an amount in the range of from 10%to 30%by weight, each based on the total weight of the dry shampoo composition.
The composition of any one of claims 1 to 8, wherein water (B) is comprised in an amount in the range of from 40%to 80%by weight, each based on the total weight of the dry shampoo composition.
The composition of any one of claims 1 to 9, wherein the alcohol (C) is comprised in an amount in the range of not more than 65%by weight, preferably in an amount in the range of from 10 to 25%by weight, each based on the total weight of the dry shampoo composition.
The composition of any one of claims 1 to 10, wherein the humectant (D) is comprised in an amount of not more than 23.5%by weight, preferably in an amount of not more than 1%by weight, each based on the total weight of the dry shampoo composition.
The composition of any one of claims 1 to 11, wherein the fragrance oil (E) is comprised in an amount in the range of from 0.1 to 1.5%by weight, preferably in the range of 0.1 to 0.3%by weight, each based on the total weight of the dry shampoo composition.
The composition of any one of claims 1 to 12, wherein the preservative (F) is comprised in an amount of not more than 1.2%by weight, each based on the total weight of the dry shampoo composition.