JPH03200711A - Shampoo composition - Google Patents

Abstract

PURPOSE:To prevent the clogging of a container nozzle as far as possible in the case of using a shampoo in a container provided with a pump and to obtain the subject composition having improved dispersibility and safety by compounding a shampoo composition containing fine particles of a water- insoluble solid with an ampholytic surfactant in combination with an acrylic resin. CONSTITUTION:The objective shampoo composition contains fine particles of a water-insoluble solid and is used by filling in a container provided with a pump and ejecting through a nozzle. The composition contains (A) an ampholytic surfactant (e.g. ampholytic surfactant of betaine-type, amidomine- type, imidazole betaine-type, etc.) and (B) an acrylic resin (e.g. a copolymer of ethyl acrylate and sodium methacrylate). The composition is effective in preventing the clogging of the nozzle of the container, keeps the fine particles of the water-insoluble solid in stably dispersed state over a long period and has excellent usability.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shampoo composition containing water-insoluble solid particles, which is used by being placed in a pump container and ejected from a nozzle. This invention relates to a shampoo composition that prevents clogging.

[Problems to be solved by conventional techniques and inventions] Conventionally,
In addition to the cleaning function, the shampoo composition also contains a disinfectant in the form of water-insoluble solid fine particles, for the purpose of improving the product value by improving the appearance and imparting various characteristics.
Pigments, emulsifiers, pearlescent agents, etc. are often added.

On the other hand, recently, regular type to pump type containers have become mainstream for storing shampoo compositions.

However, when a shampoo composition containing dispersed water-insoluble solid particles as described above is stored in a pump container and used, the water-insoluble solid particles may adhere to the nozzle of the pump container, causing clogging. .

Therefore, it has been desired to prevent clogging of a shampoo composition containing dispersed solid particles contained in a pump container. In addition, when a shampoo composition containing water-insoluble solid particles dispersed therein is stored for a long period of time, the solid particles may separate or aggregate, so it has been desired to improve the dispersion stability.

[Means and effects for solving the problem] As a result of extensive studies in order to meet the above-mentioned needs, the present inventor has formulated a shampoo composition containing water-insoluble solid particles in combination with an amphoteric active agent and an acrylic resin. By doing so, when this composition is stored in a pump container and used, nozzle clogging due to water-insoluble solid particles can be prevented as much as possible, and the dispersion stability of water-insoluble solid particles is improved, resulting in long-term use. It was discovered that separation and aggregation are unlikely to occur even after storage for a long period of time, and this led to the present invention.

The present invention will be explained in more detail below.

The shampoo composition according to the present invention contains an amphoteric active agent, water-insoluble solid particles, and an acrylic resin, and is housed in a pump container.

Here, as the amphoteric activator, one or more of the following (I) to (VI) are preferably used.

(I) Betaine type amphoteric active agent p! represented by the following formula! R' (wherein R1 is a higher alkyl group having 7 to 20 carbon atoms,
R1 and R3 are lower alkyl groups having 1 to 4 carbon atoms,
Q is selected from the group consisting of an alkylene group having 1 to 3 carbon atoms and a hydroxyalkylene group having 2 to 3 carbon atoms, and Z is -C
OO- or -SOS, and when 2 is -C00-, Q is an alkylene group and m is 0 or 1. ) In this case, suitable R1 groups include decyl, dodecyl, hexadecyl, octadecyl, eicosyl and the like. Also,
Examples of R8 and R3 include methyl, ethyl, propyl, isobutyl, and the like.

As such betaine-type amphoteric active agents, typical alkylbetaines include decylbetaine (i.e., N-decyldimethylglycine), dodecylbetaine, tetrabesylbetaine, cetylbetaine, stearylbetaine, and cocobetaine. The amidobetaine contains cocoa≧dobrovirbetaine, i.e. N-(3-cocoacylaminopropyl)-N,N-dimethyl-2-
Amino acetates, laurylamide methyl betaine, myristylamide methyl betaine, palmitylamide methyl betaine, stearylamide methyl betaine, etc.0
Typical alkyl sulfobetaines include cocodimethylsulfopropyl betaine and stearyldimethyldimethylsulfopropylbetaine, and typical amidosulfobetaines include cocoaminomethyldimethylsulfopropyl betaine, that is, N-cocoyl (dimethylamino). Propanesulfonate, stearylmethyldimethylsulfopropyl betaine, myristylmethyldimethylsulfopropyl betaine, lauryl aminomethyl-bis-(2-hydroxyethyl)-sulfopropyl betaine, i.e. -(N, N-dimethyl-N- Examples include lauryl ξ)) 2-hydroxypropanesulfonate.

(n) Amidoamine type amphoteric surfactant represented by the following formula CHgGHzCOOM', R' is a hydrogen atom, -CH,
C00M' or -GHzC)lzcOOM&,
Here, is a cation that forms a water-soluble salt. ) Specifically, such amidoamine type amphoteric surfactants include N-lauroyl-N-(2-hydroxyethyl)-N
-Carboxymethylethylenecyamine, N-lauroyl-N-(2-hydroxyethyl)-N-carboxyethylethylenediamine, N-lauroyl-N-(2-hydroxyethyl)-N',N'-bis(carboxyethyl) Examples include ethylenethia and the like.

(III) An amide adsorption type amphoteric surfactant represented by the following formula (wherein R4 is an alkyl group or alkenyl group having an average number of carbon atoms of 9 to 17, R5 is -C11COOM or (wherein R7 is an average number of carbon atoms) Alkylphenyl group substituted with an alkyl group having 7 to 19 carbon atoms or an alkyl group having an average number of carbon atoms of 7 to 15, R8 and R9 are hydrogen atoms, -CHF
00M" or -CH 冨CH 冨C00M", but R
1 and R9 cannot be hydrogen atoms at the same time, where is hydrogen, sodium, potassium, alkanolamine or alkaline earth metal. 〉Specifically, such compounds include N-lauroyl-N'-carboxymethyl-N'-carboxymethoxyethylethylenediamine, N-lauroyl-N'-carboxyethyl-
N'-(2hydroxyethyl)-ethylenediamine, N
-Lauroyl-N'-carboxyethoxyethylethylenediamine, N-lauroyl-N'-carboxyethyl-N'-carboxyethoxyethylethylenediamine, and the like.

(mV) An imidazolinium betaine type amphoteric activator or alkenyl group represented by the following formula, R1 is an alkylene group having 1 to 4 carbon atoms, RI! is an alkylene group having 1 to 4 carbon atoms or an alkylene group substituted with an OH group, M3 and M4 are each a hydrogen atom, a cation derived from an alkali metal or an alkanol group, and G is any anion. be. ) Examples of such compounds include the following.

(In the formula, R111 is an alkyl group having 5 to 19 carbon atoms (
V) Imidazolinium betaine type amphoteric surfactant represented by the following formula (wherein RI6. R" + R" + M', M
', G has the same meaning as above. Examples of such compounds include the following.

(VI) An imidazolinium betaine type or sulfobetaine type amphoteric active agent represented by the following formula.

0■ (In the formula, R111, R11, M3, M4, and Q have the same meanings as above.) Examples of such compounds include the following.

The amount of the above-mentioned amphoteric active agent is 1 to 30% of the total composition.
% (weight %, the same applies hereinafter), particularly preferably 5 to 15%.

In the present invention, water-insoluble solid fine particles are appropriately selected depending on the purpose. For example, metal salts of 2-mercaptopyridine-N-oxide (calcium, magnesium,
barium, strontium, zinc, cadmium, tin or zirconium salts, particularly preferably zinc salts). Further examples include ethylene glycol difatty acid esters, propylene glycol difatty acid esters, mica, titanium mica, and glycerin monofatty acid esters, which have a pearl-like appearance.Specifically, ethylene glycol distearate, propylene glycol distearate, etc. ,
Examples include glycerin monostearate.

The average particle diameter of the fine particles is 0.05 to 10 μm, especially 0.
．． The diameter is preferably 1 to 0.5 μm, and the amount of these water-insoluble solid particles can be selected in various ways, but it is usually 0.
．． It is 1 to 5%.

Furthermore, as the acrylic resin, the following (11 or (2)
A polymer of the formula, one or two random copolymers of the formula (3)
More than one species is preferably used.

(In the formula, X and Y are each a hydrogen atom, an alkali metal atom, an ammonium group, an alkanolamine residue, or an alkyl group having 1 to 4 carbon atoms, and p=100 to 20,000.
q=100-20000. ) In this case, in formulas (11, (2), ~20000, (1=1
It is preferable that it is 000-20000.

Specific examples of the acrylic resin include a copolymer of acrylic acid ethyl ester and sodium methacrylate or a copolymer of acrylic acid ethyl ester and triethanolamine methacrylate, which is represented by the above formula (3). :(1=1:9 to 5.5, preferably 7:3 (weight ratio)), and are preferably used.

The blending amount of the acrylic resin is preferably 0.1 to 5%, more preferably 0.5 to 3%.

In addition to the above-mentioned components, the shampoo composition of the present invention contains components of known shampoo compositions, such as anionic active agents, cationic active agents, nonionic active agents, and dissolved propylene glycol, glycerin, urea, etc. viscosity modifiers such as ethyl alcohol, isopropyl alcohol, hydroxyethylcellulose, methylcellulose, propylmethylcellulose, and higher alcohols, fragrances, ultraviolet absorbers, preservatives, appearance modifiers, and conditioning agents such as cationic polymers. be able to.

The composition of the present invention is filled into a pump container, and examples of such pump containers include containers used in commercially available Hair List Shampoo (manufactured by Lion Corporation).

Note that the nozzle diameter of the pump container may be 2 to 10 m.

〔Effect of the invention〕

The shampoo & II product of the present invention prevents clogging of the nozzle of the pump container as much as possible, and stably disperses water-insoluble solid fine particles over a long period of time, and therefore has excellent usability.

EXAMPLES Hereinafter, the present invention will be specifically explained by showing examples and comparative examples, but the present invention is not limited to the following examples.

[Example, comparative example]

A shampoo composition having the composition shown in the table was prepared and filled into a pump bottle having a nozzle diameter of 5n and the type used in a commercially available Hair List Shampoo (manufactured by Lion Corporation).

Next, the pump bottle was operated once to squirt out the contents, then left at 40° C. for one evening, and when the pump was operated again, the presence or absence of clogging was evaluated based on the following criteria.

O: Not clogged △: Slightly clogged ×: Clogged and the contents are difficult to squirt out Also, after each shampoo composition was left at 40°C and 25°C for one month, it was dispersed based on the following criteria. Stability was evaluated.

○: Uniformly dispersed and stable △: Some separation or aggregation is observed ×: Separation or aggregation is observed The above results are shown in Table 1.2.

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Claims (1)

[Claims] 1. A shampoo composition containing an amphoteric surfactant, water-insoluble solid particles, and an acrylic resin, and contained in a pump container.