JP2751502B2 - Shampoo composition - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a shampoo composition which has an excellent feel upon rinsing and has improved storage stability.

[Problems to be solved by conventional technology and invention]

Conventionally, shampoo compositions have foaming properties, especially foaming properties in systems having a relatively large amount of oil components such as bath water and hair, so that ionic surfactants such as anionic surfactants and amphoteric surfactants are used. It has been done to use.

However, shampoo compositions using these ionic surfactants have the disadvantage that hair is tangled or entangled during rinsing, and improvements in this respect have been desired.

In addition, when an amphoteric surfactant is used, the reactivity is higher than others because there are anions and cations in the molecule,
There is a disadvantage of coloring upon storage, and improvement of this point has also been demanded.

[Means and actions for solving the problem]

The present inventor has conducted various studies in order to respond to the above demand. As a result, the shampoo composition containing the amphoteric surfactant has an acyl group having 6 to 20 carbon atoms and a glucose and / or alkyl group having 1 carbon atom. 6 of alkyl glucosides of 4
Surprisingly, when a glucose fatty acid ester in which a hydroxyl group and a fatty acid are esterified is blended, the hair entanglement during rinsing peculiar to a shampoo composition containing an amphoteric surfactant is significantly reduced, and the feeling of use is improved. The present inventors have found that they do not impair the foaming properties, and that the coloring over time when an amphoteric surfactant is used is remarkably improved, and the present invention has been accomplished.

In this case, glucose fatty acids S are known as one kind of nonionic surfactant,
The above-mentioned effects are not achieved by other nonionic surfactants, and the esterification site of glucose or alkyl glucoside is at the 6-position, and the acyl group has 6 to 20 carbon atoms.
This is a specific effect of glucose fatty acid esters.

 Hereinafter, the present invention will be described in more detail.

The shampoo composition according to the present invention comprises an amphoteric surfactant, glucose and / or acyl group having 6 to 20 carbon atoms.
Or a fatty acid ester of an alkyl glucoside having 1 to 4 carbon atoms in the alkyl group, wherein glucose or a fatty acid ester of a fatty acid esterified with the hydroxyl group at position 6 of the glucose or the alkyl glucoside is used in combination. .

Here, as the zwitterionic surfactant, any of those commonly used in shampoo compositions can be used. Examples include imidazoline-type amphoteric surfactants, alkylbetaine-type amphoteric surfactants, sulfobetaine-type amphoteric surfactants, aminocarboxylate-type amphoteric surfactants, and amidobetaine-type amphoteric surfactants.

In the present invention, one of these amphoteric surfactants may be used alone, or two or more may be used in combination. The mixing amount is appropriately selected, but is usually 0.1 to 30% (% by weight, the same applies hereinafter), particularly 1 to 15% of the whole composition.

On the other hand, glucose or alkyl glucoside used in the present invention has a 6-position esterification site and an acyl group having 6 to 20 carbon atoms, such as glucose fatty acid esters (glucose and / or alkyl group having 1 carbon atom). And (4) fatty acid esters of alkyl glucosides) obtained from glucose or alkyl glucosides and fatty acid derivatives having 6 to 20 carbon atoms, more preferably 6 to 12 carbon atoms, or lower alkyl esters thereof.

In this case, as raw material glucose, corn,
Starch such as potato can be hydrolyzed with an acid or an enzyme, and then decolorized and purified. Examples of such substances include crystalline glucose, powdered glucose, granular glucose, and the like defined by JAS.

As the alkyl glucoside having 1 to 4 carbon atoms in the alkyl group of the raw material, the above glucose has 1 to 4 carbon atoms.
1-methyl glucoside, 1-ethyl glucoside, 1-butyl glucoside, and the like, and typical examples include those commercially available from Stelly.

On the other hand, if the fatty acid has 6 to 20 carbon atoms, it can be suitably used without any natural, synthetic, saturated, unsaturated, straight-chain, branched, single, mixed, etc. It may have one hydroxyl group. Specifically, as the natural fatty acids, coconut oil, palm oil, tallow oil, rapeseed oil, vegetable oils such as soybean oil, caproic acid obtained by hydrolysis from animal oil, enanthic acid, caprylic acid, pelargonic acid, decanoic acid And lauric acid, myristic acid, palmitic acid, stearic acid, linoleic acid, oleic acid, capric acid, undecanoic acid and the like.
In addition, as the synthetic fatty acid, a mixture of linear and branched fatty acids obtained by oxidizing a polymer of olefin acid can be used, and a microorganism-derived fatty acid such as γ-linolenic acid is used. You can also. Further, as the lower ester of the fatty acid, an alkyl ester of the above fatty acid having 1 to 8 carbon atoms such as methyl, ethyl and propyl can be used, and a halide of the fatty acid can be used as a raw material.

Glucose fatty acid esters can be synthesized from these raw materials using lipase, etc., such as ester synthesis, transesterification between raw fats and oils, transesterification between lower alcohol esters of fatty acids and glucose, and ester synthesis between fatty acids and glucose. It is preferable to synthesize by a known method, such as a synthesis method using fatty acid chloride and glucose, and the like.

In this case, the specific glucose fatty acid esters used in the present invention are those obtained by esterifying the OH group at the 6-position of glucose or alkyl glucoside.

Such glucose fatty acid esters include glucose-6-capryloyl monoester, glucose-
6-decanoyl monoester, glucose-6-lauroyl monoester, glucose-6-myristoyl monoester, glucose-6-palmitoyl monoester, glucose-6-oleoyl monoester, glucose-6-γ-linoleate monoester And the like.

Examples of the alkyl glucosid fatty acid ester having 1 to 4 carbon atoms include 1-methyl-6-capryloyl glucose, 1-ethyl-6-capryloyl glucose,
-Ethyl-6-lauroylglucose, 1-butyl-6
-Capryloyl glucose, 1-ethyl-6-palmitoyl glucose, 1-ethyl-6-oleoyl glucose and the like.

In the present invention, one kind of the above-mentioned glucose fatty acid esters may be used alone, or two or more kinds may be used in combination.

Here, the glucose fatty acid esters used in the present invention may include monoester and diester in which the 6-position of glucose is esterified, diester, triester and the like. It is preferable to use 90% or more, particularly 95% or more of glucose fatty acid ester in order to achieve the above-mentioned object of the present invention. Further, the polyester content of the triester or higher is preferably 1% or less, particularly preferably 0.5% or less. However, any of the above-mentioned known methods produces an ester having a low monoester content and a high polyester content. Therefore, when a monoester is obtained, labor may be required for fractionation and isolation after synthesis. Therefore, in this regard, the applicant of the present invention has previously disclosed in Japanese Patent Application No. Hei.
The method using a thermostable lipase proposed in No. 0495 is suitably adopted.

Various amounts of glucose fatty acid esters can be selected, but usually 0.1 to 30% of the whole composition, especially 1 to 30%.
~ 20%.

In the shampoo composition of the present invention, anionic surfactants, other nonionic surfactants, and cationic surfactants can be blended, if necessary, in addition to the above-mentioned surfactants.
Commonly used components, for example, foaming agents such as alkanolamides and amine oxides, emulsifiers such as higher fatty acid glycol esters and polymer emulsions, hydrotropes such as ethyl alcohol, propylene glycol, polyethylene glycol and glycerin, oils and fats, higher alcohol esters , Emollients such as lanolin derivatives, protein derivatives, squalane, and cationized cellulose; thickeners such as cellulose derivatives, PVA, carbopol, PVP, and salt; preservatives such as benzoic acid, benzoate, and sorbic acid; EDT
A, NTA, sequestering agents such as citric acid, sodium phosphate, etc.
One or more kinds of pH adjusters, ultraviolet absorbers, dandruff agents, pigments, fragrances and the like can be blended.

The shampoo composition of the present invention can be prepared into an appropriate form such as a cream or a liquid by a usual method using the above-mentioned components.

〔The invention's effect〕

The shampoo composition of the present invention not only has good foaming properties, but also has an excellent feel during rinsing, and also has good storage stability.

Next, the present invention will be specifically described with reference to Examples and Comparative Examples.

[Examples and comparative examples]

(1) Smoothness of hair during rinsing The hair is divided into two parts, left and right, and each of them is whisked by applying a 3 g standard sample and a sample solution having the composition shown in Table 1, and then smoothing the hair with warm water. Evaluation and judgment were made by 10 testers according to the following criteria.

◎: Smoothness is better than standard shampoo ○: 〃 Slightly better △: 〃 Equivalent ×: 劣 Poor As standard shampoo, 10% by weight of sodium polyoxyethylene lauryl ether sulfate (: 3) and coconut oil fatty acid diethanolamide are used. A composition having a composition of 3% by weight, 1% by weight of sodium sulfate and the balance of water was used.

(2) Evaluation of Color Stability A sample solution having the composition shown in Table 1 was stored at 60 ° C. or under irradiation of a xenon lamp for one month, and the color change was visually determined. The evaluation criteria are as follows.

 ：: No discoloration is observed as compared with the product stored at room temperature.

△: 〃 Some discoloration is observed ×: 〃 Discoloration is apparent Next, the shampoo compositions of Examples 7 to 11 were prepared according to the composition shown in Table 2, and the smoothness and the color stability of the hair upon rinsing were evaluated and evaluated. The results are shown in the same table. As is clear from the results in Table 2, a sufficient effect was observed for all the compositions.

Claims (1)

(57) [Claims] A shampoo composition containing an amphoteric surfactant is a fatty acid ester of glucose having an acyl group of 6 to 20 carbon atoms and / or an alkyl glucoside of an alkyl group having 1 to 4 carbon atoms. A shampoo composition comprising a glucose fatty acid ester obtained by esterifying the hydroxyl group at position 6 of the glucose or alkyl glucoside and a fatty acid.