JPH0553199B2 - - Google Patents

Description

[Detailed description of the invention]

【0001】

TECHNICAL FIELD The present invention relates to a surfactant composition with excellent low-temperature stability.

[0002]

[Prior Art] Cleaning agents such as kitchen detergents, household detergents, shampoos, body shampoos, and laundry detergents, and surfactant compositions such as hair cosmetics, avoid contact with the skin of hands and other surfaces during washing. Therefore, compositions that are mild and do not leave a "slimy" feeling on the skin have been considered.

[0003] Fatty acids with 6 to 18 carbon atoms and 5 to 6 carbon atoms
A sugar ester surfactant consisting of a monosaccharide or an ester thereof with a monoalkyl ether is known as a skin-friendly surfactant with little skin irritation. However, when this sugar ester surfactant is added to detergents and hair cosmetics,
There was a problem that low-temperature stability deteriorated. Therefore, if these surfactant compositions are stored at low temperatures in cold regions, etc., they become non-uniform and become cloudy.

[0004]

OBJECTS OF THE INVENTION The object of the present invention is to improve the low-temperature stability of a surfactant composition containing a sugar ester surfactant.

【0005】

[Means for Solving the Problems] The surfactant composition of the present invention has a sugar ester surfactant consisting of an ester of a fatty acid having 6 to 18 carbon atoms and a monosaccharide having 5 to 6 carbon atoms or a monoalkyl ether thereof. In the sugar ester surfactant, a monoester (A) in which a fatty acid residue having 6 to 18 carbon atoms is bonded to the 6-position of a monosaccharide, and It is characterized in that the ratio (B)/(A) of the monoester (B) bonded to other sites is in the range of 0.5/99.5 to 25/75 by weight.

[0006] The sugar ester surfactant of the present invention is
It is a mild surfactant with little skin irritation, and is obtained from a _C6 - _C8 fatty acid or a fatty acid derivative such as an ester of this fatty acid, and monopentoses, monohexoses, or their monoalkyl ethers.

[0007] Here, the fatty acid may be saturated or unsaturated, and may be linear or branched. Specific examples of such fatty acids include, for example, caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, caproleic acid, lauroleic acid, myristoleic acid, palmitoleic acid, oleic acid, methyl Examples include undecanoic acid.

[0008] Further, as fatty acid derivatives, fatty acid esters of the above-mentioned fatty acids and lower alcohols are used, and examples thereof include methyl esters, ethyl esters, propyl esters, etc. of the above-mentioned fatty acids.

[0009] Monopentoses include xylose, arabinose, ribulose, xylulose,
In addition to monopentose of lyxoses, monoalkylated products (monoalkyl ethers) such as methyl xylose and ethyl arabinose can be mentioned. Examples of monohexoses include monohexoses such as glucose, mannose, galactose, and fructose, as well as monoalkylated products (monoalkyl ethers) such as methylglucose and ethylglucose.

[0010] In the present invention, in the sugar ester surfactant, a monoester (A) in which one C ₆ to _{C 18} fatty acid residue is bonded to the 6-position of a monosaccharide, and The monoester (B) in which one C ₆ to C ₁₈ fatty acid residue is bonded to the site is (B)/(A) =
0.5/99.5~25/75, preferably 0.5/99.5~20/
Must be in the 80 range. By containing the monoester (B) having an ester bond at positions other than the 6-position in the sugar ester surfactant in the above range, the low-temperature stability of the surfactant composition is improved, and when stored at low temperatures, It also does not cause turbidity. On the other hand, if the amount of monoester (B) having an ester bond at positions other than the 6-position exceeds the above range, the high temperature stability of the composition will be significantly deteriorated. The sugar ester surfactant of the present invention has C ₆ to one hydroxyl group of a monosaccharide.
It is preferable that the main component is a monoester type in which _C18 fatty acid residues are ester bonded, and it is desirable that the amount of polyester of triester or higher is 1% by weight or less.

[0011] The sugar ester surfactant is blended in the surfactant composition of the present invention in an amount of 1 to 30% by weight, preferably 5 to 25% by weight. If this amount is too small, the cleaning effect and the "slimy" improvement effect will not be sufficiently achieved. On the other hand, even if the blending amount is increased, no improvement in cleaning performance is observed, and the stability of the system also deteriorates.

[0012] The liquid cleaning composition of the present invention may contain various optional ingredients depending on its use, such as surfactants such as anionic surfactants, nonionic surfactants, cationic surfactants, and amphoteric surfactants. Agents or other additives may be added as appropriate.

[0013] Examples of anionic surfactants include the following. (1) C ₁₀ - C ₁₈ alkyl sulfate (2) C ₁₀ - C ₁₈ alkanesulfonate (3) C ₁₀ - C ₁₈ olefin sulfonate (4) The number of carbon atoms in the alkyl group is C ₁₀ - _C18 alkylbenzene sulfonate (5) Alkyl or alkenyl group has 10 or more carbon atoms
18 polyoxyethylene alkyl (or alkenyl) ether sulfate (average number of added moles of ethylene oxide = 2 to 7)

[0014] As these salts, alkali metal salts, alkaline earth metal salts, ammonium salts, alkanolamine salts, etc. are used.

[0015] In addition, other hydrotropes such as polyoxyethylene alkyl ether, alkylamine oxide, alkanolamine, fatty acid alkanolamide; lower alcohol, polyhydric alcohol, lower aryl sulfonate; ethylenediaminetetraacetate, diethylenetriaminepentaacetic acid Metal ion sequestrants such as salts; antibacterial agents such as benzoic acid, oils such as silicones, higher alcohols, polyols, humectants, anti-inflammatory agents, anti-dandruff agents, various ionic polymer compounds, pigments, fragrances, etc. are added. be able to.

[0016] The surfactant composition of the present invention can be applied as a cleaning agent and cosmetic for various purposes, but especially when the composition comes into contact with the skin of the hands, skin, scalp, etc., tableware, etc. Suitable for cleaning hard surfaces such as tiles and glass, for example, hair shampoo, body shampoo, kitchen detergent,
It is suitable for household detergents for baths and toilets, laundry detergents, hair rinses, hair creams, hair gels, hair tonics, hair mousses and other hair cosmetics.

【0017】

【Effect of the invention】

According to the present invention, when using a sugar ester surfactant, a monoester (A) in which a fatty acid residue having 6 to 18 carbon atoms is bonded to the 6-position of a monosaccharide;
By controlling the amount of monoester (B) bonded to other positions within a predetermined range, the low-temperature stability of a surfactant composition containing a sugar ester surfactant can be improved. Therefore, even in cold regions, the surfactant composition can be stored stably, does not become cloudy, and is excellent in terms of product quality.

【0018】

[Examples] Example 1 Liquid detergents having the compositions shown in Tables 1 and 2 below were prepared and their low temperature stability was evaluated, and the results are shown in Tables 1 and 2. Note that the expressions such as "glucose-1-C ₆ ester" in the sugar ester surfactants in the table mean "monoester in which a fatty acid having 6 carbon atoms is bonded to the 1-position of glucose" and the like.

[0019] Low-temperature stability evaluation method The surfactant composition was filled into a 100 ml glass bottle, left at -7°C for 1 month, and the appearance was evaluated.

【0020】

[Table 1] ■■■ Turtle shell [0078] ■■■

【0021】

[Table 2] ■■■ Turtle shell [0079] ■■■

Example 2 Rinse compositions, shampoo compositions, hair treatment compositions, hair cream compositions, hair tonic compositions, hair gel compositions, and hair mousse compositions having the following formulations were prepared. All of these compositions showed excellent low temperature stability.

【0023】 (1) Rinse composition

[Table 3] ■■■ Turtle shell [0080] ■■■

【0024】 (2) Shampoo composition

[Table 4] ■■■ Turtle shell [0081] ■■■

【0025】 (3) Hair treatment composition

[Table 5] ■■■ Turtle shell [0082] ■■■

【0026】 (4) Hair cream composition

[Table 6] ■■■ Turtle shell [0083] ■■■

【0027】 (5) Hair tonic composition

[Table 7] ■■■ Turtle shell [0084] ■■■

【0028】 (6) Hair gel composition

[Table 8] ■■■ Turtle shell [0085] ■■■

[0029] (7) Hair mousse composition (aerosol type hair conditioner composition)

[Table 9] ■■■ Turtle shell [0086] ■■■

Claims (1)

[Claims] [Claim 1] Fatty acid having 6 to 18 carbon atoms and 5 carbon atoms
A sugar ester surfactant consisting of ~6 monosaccharides or their esters with monoalkyl ethers
~30% by weight, and in the sugar ester surfactant, a monoester (A) in which a fatty acid residue having 6 to 18 carbon atoms is bonded to the 6-position of a monosaccharide, and other sites other than the 6-position. A surfactant composition characterized in that the ratio (B)/(A) of the monoester (B) bonded to the monoester (B) is in the range of 0.5/99.5 to 25/75 by weight.