JP2020040914A - Pre-shampoo composition - Google Patents

Abstract

To provide a pre-shampoo composition that has high sebum removal effect, has reduced squeaky feeling during rinsing, has good scalp compatibility, and does not drip from scalp.SOLUTION: A pre-shampoo composition has (A) polyoxyethylene polyoxypropylene decyl tetradecyl ether, (B) an ampholytic surfactant, (C) an ethanol, (D) a polyhydric alcohol, (E) an anionic polymer.SELECTED DRAWING: None

Description

The present invention relates to a pre-shampoo composition, and more particularly, by applying the composition to the scalp and the hair immediately before washing the hair with the shampoo, has a good sebum removing effect, reduces the feeling of squeaky during rinsing, and has a good fit to the scalp. , A pre-shampoo composition that does not drip from the scalp.

Seborrheic dermatitis is one of the causes of dandruff. The main cause of seborrheic dermatitis is thought to be the overgrowth of a fungus called Malassezia, one of the indigenous bacteria on the scalp. When Malassezia spp. Grows abnormally, triglycerides in sebum are decomposed more than necessary, and fatty acids are produced more than necessary. Unnecessary fatty acids can irritate the skin, which is the cause of seborrheic dermatitis. In order to prevent this seborrheic dermatitis, it is necessary to remove excess or deteriorated sebum secreted from the scalp.

Conventionally, shampoo compositions exist for the purpose of removing sebum and dirt from the scalp. However, there are also sebum and oily components of the scalp that cannot be removed by performing shampooing only once, and for the purpose of removing them, a pre-shampoo composition used on the scalp and hair before washing the hair with shampoo is known. (Patent Document 1).

JP 2002-20244 A

However, if the removing power of the sebum or oily component by the pre-shampoo composition is too high, there is a problem that a squeaky feeling is generated at the time of rinsing or that the finger of a dried hair is impaired. In addition, the preshampoo composition often has a low viscosity in order to penetrate the scalp, and there is also a problem that the preshampoo composition easily drips from the scalp.

The present inventors have conducted intensive studies to solve the above problems, and as a result, (A) polyoxyethylene polyoxypropylene decyl tetradecyl ether, (B) amphoteric surfactant, (C) ethanol, (D) polyhydric alcohol, And (E) a pre-shampoo composition characterized by containing xanthan gum, which can solve the above problems, and have completed the present invention.

INDUSTRIAL APPLICABILITY The present invention can provide a pre-shampoo composition which has a good sebum removing effect, reduces a feeling of squeaking at the time of rinsing, has good adaptation to the scalp, and does not drip from the scalp.

Hereinafter, the present invention will be described in detail. Units indicating the contents are all mass% unless otherwise specified.

The preshampoo composition according to the present invention contains (A) polyoxyethylene polyoxypropylene decyl tetradecyl ether from the viewpoint of sebum removing effect.

The component (A) may be contained in the pre-shampoo composition, but is preferably 0.01 to 5%, more preferably 0.1 to 3%, and still more preferably 0.1 to 3% from the viewpoint of sebum removing effect. It contains 5 to 2.5%. When the component (A) is less than 0.01%, there is a possibility that the sebum is not sufficiently removed. If the content of the component (A) exceeds 5%, the hair may feel squeaky during washing and may have a poor feel.

The component (A) is not particularly limited. For example, polyoxyethylene (30 mol) polyoxypropylene (6 mol) decyltetradecyl ether, polyoxyethylene (20 mol) polyoxypropylene (6 mol) decyltetradecyl Ether, polyoxyethylene (12 mol) polyoxypropylene (6 mol) decyltetradecyl ether and the like. Among them, from the viewpoint of compatibility with sebum of the scalp, polyoxyethylene (30 mol) polyoxypropylene (6 mol) is preferable. Mole) decyltetradecyl ether is preferred. One or more of these may be selected and contained.

The preshampoo composition according to the present invention contains (B) an amphoteric surfactant from the viewpoint of sebum removing effect.

The component (B) is not particularly limited, and examples thereof include an amino acid-type amphoteric surfactant and a betaine-type amphoteric surfactant. It is preferable to contain a betaine-type amphoteric surfactant from the viewpoint that the effect of the present invention is more exhibited.

The amino acid type amphoteric surfactant is not particularly limited. For example, N-lauroyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine sodium, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine , Undecyl hydroxyethyl imidazolinium betaine sodium, alkyldiaminoethyl glycine hydrochloride, N-coconut fatty acid acyl-N'-carboxyethyl-N'-hydroxyethylethylenediamine sodium, N-coconut fatty acid acyl-N'-carboxyethoxy Ethyl-N'-carboxyethylethylenediamine disodium, N-coconut fatty acid acyl-N'-carboxymethoxyethyl-N'-carboxymethylethylenediamine disodium, lauryldiaminoethylglycol Glycine-type amphoteric surfactants such as sodium acetate, palm oil fatty acid acyl-N-carboxyethyl-N-hydroxyethylethylenediamine sodium, sodium laurylaminopropionate, sodium laurylaminodipropionate, and triethanolamine laurylaminopropionate. Aminopropionic acid type amphoteric surfactants and the like can be mentioned. One or more of these may be selected and contained.

The betaine-type amphoteric surfactant is not particularly limited, for example, coconut oil alkyl betaine, lauryl dimethylamino acetate betaine, myristyl dimethylamino acetate betaine, stearyl dimethyl amino acetate betaine, stearyl dimethyl betaine sodium, coconut oil fatty acid amide propyl betaine, Aminoacetic acid betaine type amphoteric surfactants such as palm oil fatty acid amide propyl betaine, amide amide propyl betaine lauric acid, amidopropyl betaine ricinoleate, stearyl dihydroxyethyl betaine, and sulfobetaine type amphoteric surfactants such as lauryl hydroxysulfobetaine. Can be One or more of these may be selected and contained.

The component (B) preferably contains amide amidopropyl betaine laurate from the viewpoint of the sebum removing effect and the feel of the hair at the time of rinsing.

The component (B) may be contained in the pre-shampoo composition, but is preferably 0.03 to 9%, more preferably 0.3 to 3%, and still more preferably 0.1 to 3% from the viewpoint of sebum removing effect. It contains 8 to 2.5%. When the component (B) is less than 0.03%, the sebum may be insufficiently removed. If the content of the component (B) exceeds 9%, the hair may feel squeaky during washing and may have a poor feel.

The preshampoo composition according to the present invention contains (C) ethanol from the viewpoint of familiarity with the scalp and permeability.

The component (C) may be contained in the pre-shampoo composition, but is preferably 0.1% to 50%, more preferably 1% to 30%, and still more preferably, from the viewpoint of familiarity with the scalp and permeability. It contains 3 to 20%. If the content of the component (C) is less than 0.1%, adaptability to the scalp and permeability may be deteriorated, and a sebum removing effect may not be exhibited. When the component (C) exceeds 50%, the viscosity of the composition is low, the composition drips from the scalp, and the sebum removing effect may not be exhibited.

The pre-shampoo composition according to the present invention contains (D) a polyhydric alcohol from the viewpoint of familiarity with and penetration into the scalp.

The component (D) is not particularly restricted but includes, for example, glycerin, 1,3-butylene glycol, ethylene glycol, polyethylene glycol, propylene glycol, diglycerin, dipropylene glycol and the like. One or more of these may be selected and contained.

The component (D) preferably contains 1,3-butylene glycol from the viewpoint of conformability to the scalp and permeability.

The component (D) may be contained in the pre-shampoo composition, but is preferably from 0.1 to 20%, more preferably from 1 to 10%, and still more preferably from the viewpoint of familiarity with the scalp and permeability. It contains 2 to 8%. If the content of the component (D) is less than 0.1%, adaptability to the scalp and permeability may be deteriorated, and a sebum removing effect may not be exhibited. If the content of the component (D) exceeds 20%, the scalp may be sticky and the hair may feel squeaky when washed off.

The preshampoo composition according to the present invention contains (E) an anionic polymer from the viewpoint of imparting an appropriate viscosity.

Although the component (E) is not particularly limited, for example, dextran sulfate sodium, carboxymethyl dextran sodium, carrageenan, gum arabic, karaya gum, tragacanth gum, sodium alginate, xanthan gum, modified xanthan gum, sodium carboxymethylcellulose, crosslinked polyacrylic acid, carboxylate Vinyl polymer, alkyl-modified carboxyvinyl polymer, polyacrylamide, acrylamide / acrylamide-2-methylpropanesulfonate copolymer, acrylamide / acryloyldimethyltaurate salt copolymer, hydroxyethyl acrylate / acryloyldimethyltaurate salt copolymer and Acrylate / acryloyl dimethyl taurate copolymer and the like can be mentioned. One or more of these may be selected and contained.

The component (E) may contain xanthan gum from the viewpoints of ease of blending into the pre-shampoo composition, easy development of viscosity, ease of application to the scalp, and familiarity with the scalp. preferable.

The component (E) may be contained in the pre-shampoo composition, but is preferably 0.02 to 5%, more preferably 0.2 to 3%, and still more preferably 0.2 to 3% from the viewpoint of appropriate viscosity. It contains 5 to 2%. When the component (E) is less than 0.02%, sufficient viscosity cannot be obtained, and the composition may drip from the skin during application. When the component (E) exceeds 5%, the viscosity of the composition becomes high, and it may be difficult to apply the composition uniformly to the entire scalp.

In the preshampoo composition of the present invention, as long as the effects of the present invention are not impaired, anionic surfactants, cationic surfactants, (A) ) Nonionic surfactants other than components, higher alcohols, silicone oils, hydrocarbon oils, ester oils, vegetable oils, cationic polymers, amphoteric polymers, nonionic polymers, sequestering agents, ultraviolet absorbers, fragrances, oxidation It may contain an inhibitor, a humectant, a cooling agent, a vitamin, a plant extract, a pH adjuster, a coloring agent, and the like, and may contain one or more kinds.

The viscosity at 20 ° C. of the present invention is preferably from 2,000 mPa · s to 20,000 mPa · s, more preferably from 4,000 mPa · s to 15,000 mPa · s, from the viewpoint of sagging during coating.

The viscosity in the present invention is determined by filling a sample bottle (Food 140: manufactured by Daiichi Glass Co., Ltd.) with 120 g of a pre-shampoo composition prepared by an ordinary method, and allowing it to stand at 20 ° C. for 24 hours. It was measured after rotating for 1 minute at 20 ° C. and 12 rpm using a No. M4 rotor with a meter (model: Digital Viscometer TVB-10M, manufactured by Toki Sangyo Co., Ltd.).

The pH at 20 ° C. of the present invention is preferably from 4 to 8, and more preferably from 5 to 7.

The pre-shampoo composition according to the present invention is not particularly limited, and is filled in a PE container, a PET container, a glass container, or the like, and applied directly to the scalp from the mouth of a nozzle or a tube, or an appropriate amount is applied to a finger and applied to the scalp. Can be used.

The properties of the pre-shampoo composition according to the present invention are preferably gels having an appropriate viscosity from the viewpoint of retention on the scalp and compatibility with the scalp.

Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples. However, the present invention is not limited only to the following examples.

In the evaluation tests described in the present specification, the components contained in the pre-shampoo composition and the results of various experiments carried out while variously changing the contents are shown below. In addition, the unit which shows the content of each component of the pre-shampoo composition was all mass%, and was prepared by an ordinary method.

In the evaluation test shown in this specification, "sebum removing effect", "no squeaky feeling at the time of rinsing", "fitness to scalp", and "no dripping" were evaluated.

"Sebum removal effect"
10 g of the obtained pre-shampoo composition is applied to the entire scalp of the panel, rubbed well, and washed away with 40 ° C. water. Thereafter, the hair was dried with a dryer, and after the heat disappeared, the scalp at the top of the head was photographed with a microscope, and the sebum removal effect was visually confirmed from the photographed image.

"No squeaky feeling when washing off"
10 g of the obtained pre-shampoo composition was applied to the entire scalp of the panelists, kneaded well, and the squeaky feeling of the hair when washed with 40 ° C. water was confirmed.

"Familiar to the scalp"
When 10 g of the obtained pre-shampoo composition was applied to the entire scalp of the panel, conformity to the scalp was confirmed.

"No dripping"
When 10 g of the obtained pre-shampoo composition was applied to the entire scalp of the panel, it was confirmed whether the pre-shampoo composition dripped from the scalp.

(Evaluation method)
Ten panelists used the pre-shampoo composition and performed a sensory evaluation on each item. The average of all the individuals is evaluated on a 5-point scale (5 points (very good), 4 points (better), 3 points (good), 2 points (poor), 1 point (very poor) for each item After calculating the points, it was determined according to the following criteria.
(Criteria for judging average points)
4.0 or more: ◎
3.0 points or more and less than 4.0 points: ○
2.0 points or more and less than 3.0 points: △
Less than 2.0 points: ×

(First evaluation test)
In the first evaluation test, preshampoo compositions in which the type and content of the component (A) were variously changed were evaluated. Table 1 shows the components of the pre-shampoo composition, their contents and the evaluation results.

From Examples 1 to 8 shown in Table 1, favorable results were obtained with respect to "sebum removing effect", "no squeaky feeling at the time of rinsing", "fitting to scalp" and "no dripping".

(Second evaluation test)
In the second evaluation test, preshampoo compositions in which the type and content of the component (B) were variously changed were evaluated. Table 2 shows the components of the pre-shampoo composition, their contents, and the evaluation results.

From Examples 9 to 14 shown in Table 2, good results were obtained with respect to "sebum removing effect", "no squeaky feeling at the time of rinsing", "fitness to scalp" and "no dripping".

(Third evaluation test)
In the third evaluation test, preshampoo compositions in which the type and content of the component (C) were variously changed were evaluated. Table 3 shows the components of the pre-shampoo composition, their contents, and the evaluation results.

From Examples 15 to 20 shown in Table 3, good results were obtained with respect to "sebum removing effect", "no squeaky feeling at the time of rinsing", "fitness to scalp" and "no dripping".

(4th evaluation test)
In the fourth evaluation test, preshampoo compositions in which the type and content of the component (D) were variously changed were evaluated. Table 4 shows the components of the pre-shampoo composition, their contents, and the evaluation results.

From Examples 21 to 27 shown in Table 4, good results were obtained with respect to "sebum removing effect", "no squeaky feeling at the time of rinsing", "fitness to scalp" and "no dripping".

(Fifth evaluation test)
In the fifth evaluation test, preshampoo compositions in which the type and content of the component (E) were variously changed were evaluated. Table 5 shows the components of the pre-shampoo composition, their contents, and the evaluation results.

From Examples 28 to 34 shown in Table 5, good results were obtained with respect to "sebum removing effect", "no squeaky feeling at the time of rinsing", "fitting to scalp" and "no dripping".

INDUSTRIAL APPLICABILITY The present invention can provide a pre-shampoo composition which has a good sebum removing effect, reduces a feeling of squeaking at the time of rinsing, has good adaptation to the scalp, and does not drip from the scalp.

Claims (6)

A preshampoo composition comprising (A) polyoxyethylene polyoxypropylene decyl tetradecyl ether (B) an amphoteric surfactant (C) ethanol (D) a polyhydric alcohol (E) an anionic polymer. The pre-shampoo composition according to claim 1, wherein the content of the component (A) is 0.01 to 5% by mass. The preshampoo composition according to claim 1 or 2, wherein the component (A) is polyoxyethylene (30 mol) polyoxypropylene (6 mol) decyltetradecyl ether. The pre-shampoo composition according to any one of claims 1 to 3, wherein the content of the component (B) is 0.03 to 9% by mass. The preshampoo composition according to any one of claims 1 to 4, wherein the component (B) is amidopropyl betaine laurate. The preshampoo composition according to any one of claims 1 to 5, wherein the content of the component (E) is 0.02 to 5% by mass.