JPH0585596B2 - - Google Patents

Description

[Detailed description of the invention]

【0001】

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

[0002]

[Prior Art] Since cleaning agents such as kitchen detergents, household detergents, shampoos, body shampoos, and laundry detergents inevitably come into contact with the skin of hands and other surfaces during cleaning, they have conventionally been applied with mild, A cleaning agent composition that does not give a sticky feeling has been studied.

[0003] Fatty acids with 6 to 18 carbon atoms and 5 to 6 carbon atoms
Sugar ester surfactants consisting of monosaccharides or their esters with monoalkyl ethers are known as cleansing agents that are mild and do not give a "slimy" feeling to the skin. However, when this sugar ester surfactant is blended into a liquid detergent, there is a problem that the low-temperature stability deteriorates. Therefore, when a liquid detergent composition is stored at low temperatures in a cold region, etc., it becomes non-uniform and becomes cloudy.

[0004]

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

[0005]

[Means for Solving the Problems] The liquid cleaning composition of the present invention contains the following components (a) and (b) in a weight ratio of (a)/(b) of 1/9 or more. It is characterized by (a) Sugar ester surfactant consisting of an ester of a fatty acid having 6 to 8 carbon atoms and a monosaccharide having 5 to 6 carbon atoms or a monoalkyl ether thereof: 1 to 30% by weight. (b) Sugar ester surfactant consisting of an ester of a fatty acid having 10 to 12 carbon atoms and a monosaccharide having 5 to 6 carbon atoms or a monoalkyl ether thereof: 1 to 30% by weight.

[0006] The sugar ester surfactants of components (a) and (b) are surfactants that are mild to the skin with little skin irritation, but the carbon chain length of the fatty acid residue is 10 to 10%.
When a liquid detergent composition is prepared by blending only the sugar ester surfactant as component (b) (12), the long-term storage stability at low temperatures is poor. On the other hand, component (a), a sugar ester surfactant whose fatty acid residue has 6 to 8 carbon atoms, is mixed so that the weight ratio of (a)/(b) is 1/9 or more. Low temperature stability is improved by preferably mixing (a)/(b) in the range of 2/8 to 6/4. Furthermore, when only component (a) is blended into a liquid detergent composition without using component (b), a sugar ester surfactant, the cleaning performance is slightly inferior.

[0007] The sugar ester surfactants (a) and (b) are both blended in the liquid detergent 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
The effect of improving “sliminess” cannot be sufficiently obtained. 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.

[0008] The sugar ester surfactants (a) and (b) are composed of a fatty acid having a predetermined number of carbon atoms or a fatty acid derivative such as an ester of this fatty acid, monopentoses, monohexoses, or monoalkyl ethers thereof. obtained from.

[0009] Here, the fatty acid may be saturated or unsaturated, and may be linear or branched. Specific examples of the fatty acid in component (a) include caproic acid and caprylic acid. Further, specific examples of fatty acids in component (b) include capric acid, lauric acid, methylundecanoic acid, caproleic acid, lauroleic acid,
Examples include myristoleic acid and palmitoleic acid.

[0010] 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.

[0011] Monopentoses include xylose, arabinose, ribulose, xylulose,
In addition to monopentoses such as lyxose, examples include monoalkylated products (monoalkyl ethers) such as methyl xylose and ethyl arabinose. Examples of monohexoses include monohexoses such as glucose, mannose, galactose, and fructose, as well as monoalkylated products (monoalkyl ethers) such as methylglucose and ethylglucose.

[0012] The sugar ester surfactants of the components (a) and (b) of the present invention preferably have a monoester type as a main component, in which a fatty acid residue is ester-bonded to one hydroxyl group of a monosaccharide. It is desirable that the amount of polyester of ester or higher is 1% by weight or less.

[0013] The liquid detergent 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.

[0014] Examples of anionic surfactants include the following. 1 Alkyl sulfate of C ₁₀ to C ₁₈ 2 Alkanesulfonate of C ₁₀ to _{C 18} 3 Olefin sulfonate of C ₁₀ to _{C 18} 4 Alkylbenzene sulfonate of alkyl group having carbon number of C ₁₀ to _{C 18} 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)

[0015] As these salts, alkali metal salts, alkaline earth metal salts, ammonium salts, alkanolamine salts, etc. are used.

[0016] 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 Sequestering agents such as salts, antibacterial agents such as benzoic acid, dyes, fragrances, etc. can be added.

[0017] The cleaning composition of the present invention can be applied as a cleaning agent for various purposes, but in particular, when it is used, the cleaning composition comes into contact with the skin of the hands, skin, scalp, etc., tableware, tiles, etc. Suitable for cleaning hard surfaces such as glass, for example shampoo, body shampoo, kitchen detergent, bath detergent, etc.
Suitable for household detergents for toilets, laundry detergents, etc.

[0018]

[Effects of the Invention] According to the present invention, (a) carbon number is 6 or more;
By blending a sugar ester surfactant in which 8 fatty acid residues are ester-bonded and (b) a sugar ester surfactant in which fatty acid residues having 10 to 12 carbon atoms are ester-bonded in a predetermined range, The low-temperature stability of liquid detergent compositions containing ester surfactants can be improved. Therefore, even in cold regions, the liquid detergent composition can be stored stably, does not become cloudy, and is excellent in product quality.

[0019]

[Example] 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 "C ₆ glucose ester" in the sugar ester surfactants in the table mean "ester of glucose and fatty acid having 6 carbon atoms".

[0020] Low-temperature stability evaluation method: Fill a 100ml glass bottle with a liquid detergent composition,
The sample was left at -5°C for 1 month and its appearance was evaluated.

[0021]

[Table 1] ■■■ Turtle shell [0061] ■■■

[0022]

[Table 2] ■■■ Turtle shell [2061] ■■■

Claims (1)

[Claims] Claim 1: (a) Fatty acid having 6 to 8 carbon atoms and 5 carbon atoms
Sugar ester surfactant consisting of ~6 monosaccharides or their esters with monoalkyl ethers: 1
~30% by weight; (b) 1 to 30% by weight of a sugar ester surfactant consisting of an ester of a fatty acid having 10 to 12 carbon atoms and a monosaccharide having 5 to 6 carbon atoms or a monoalkyl ether thereof; A liquid detergent composition containing (a)/(b) in a weight ratio of 1/9 or more.