JP5073266B2 - Liquid detergent composition - Google Patents

Description

  The present invention relates to a liquid cleaning composition, and more particularly to a liquid cleaning composition suitable for cleaning hard surfaces around kitchens, especially dishes and cooking utensils.

  Conventional hard surface cleaners have high foaming power and high detergency, such as alkylbenzene sulfonate, α-olefin sulfonate, alkyl sulfate, alkyl sulfonate, polyoxyalkylene alkyl ether sulfate, and the like. Ionic surfactants have been used as the main component. However, while an anionic surfactant is excellent in detergency, there are concerns about the effect on the hand skin, and various devices have been devised in combination. For example, a mild base for the hand skin is enhanced by using a cleaning base in combination with polyoxyalkylene alkyl ether sulfate and amine oxide (Patent Document 1).

On the other hand, alkylglycosides having a sugar skeleton are known to be extremely mild nonionic surfactants that are very mild to the hand skin and form extremely fine bubbles. However, when the alkylglycoside is used alone or as a main washing base, the detergency is weaker than that of an anionic surfactant, so that an anionic or amphoteric surfactant having a high detergency is used in combination, A cleaning agent that is excellent in cleaning power and gentle to the hand skin has been proposed (Patent Documents 2 and 3). Further, Patent Document 4 proposes a cleaning agent having excellent detergency using a nonionic surfactant together with a hydrophobic organic solvent, and discloses that alkylglycosides can be used as the nonionic surfactant.
Japanese Patent Laid-Open No. 5-98289 JP-A-62-74999 JP-A-1-69695 JP 2004-323835 A

  As mentioned above, blending alkylglycosides into hard surface and other detergents has been carried out, but almost no detergency has been found when alkylglycosides are used as the main surfactant. . Therefore, a liquid detergent composition having an excellent detergency using an alkyl glycoside as a main surfactant is demanded.

  The present inventors have found that a limited nonionic compound having a 2-ethyl-hexyl group is blended in order to improve the detergency of a liquid detergent having an alkyl glycoside as a main surfactant.

  That is, the present invention provides (a) an alkyl glycoside (hereinafter referred to as component (a)), (b) one selected from 2-ethyl-1-hexanol, ethylene glycol-2-ethylhexyl ether and diethylene glycol-2-ethylhexyl ether. It contains the above compound (hereinafter referred to as component (b)) and water, and (a) / (b) = 90 / 10-55 / 45 (mass ratio), (a) + (b) = 25-50 It is related with the liquid detergent composition which is the mass%.

  According to the present invention, a liquid detergent composition having an alkyl glycoside as a main washing base and having excellent detergency can be obtained.

<(A) component>
Examples of the component (a) of the present invention include alkyl glycosides represented by the following general formula (1).
R ^1a- (OR ^1b ) _m G _n (1)
[Wherein, R ^1a is a linear alkyl group having 8 to 16 carbon atoms, and R ^1b is an alkylene group having 2 to 4 carbon atoms. G is a group derived from a reducing sugar. m is the average number of moles added and represents a number from 0 to 5, n is the average degree of condensation and represents a number from 1 to 3. ]

  Regarding the compound of the general formula (1), the reducing sugar as a raw material may be either aldose or ketose, and examples include triose, tetrose, pentose and hexose having 3 to 6 carbon atoms. Specific examples of aldose include apiose, arabinose, galactose, glucose, lyxose, mannose, galose, aldose, idose, talose and xylose, and examples of ketose include fructose. In the present invention, among these, aldopentose or aldohexose having 5 or 6 carbon atoms is preferable, and glucose is particularly preferable.

<(B) component>
The component (b) of the present invention is one or more compounds selected from 2-ethyl-1-hexanol, ethylene glycol-2-ethylhexyl ether and diethylene glycol-2-ethylhexyl ether, and diethylene glycol-2-ethylhexyl ether is preferable. . If a predetermined amount of the compound corresponding to the component (b) is contained in the composition, a mixture such as an adduct of 2-ethyl-1-hexanol with ethylene oxide (hereinafter referred to as EO) is used as the component (b). Can also be used.

<(C) component>
The liquid detergent composition of the present invention preferably contains an anionic surfactant as the component (c) in addition to the components (a) and (b). As the component (c), an anionic surfactant having an alkyl group or an alkenyl group having 10 to 18, preferably 8 to 14 carbon atoms is preferable. Specific examples of the anionic surfactant include alkylbenzene sulfonate, polyoxyalkylene alkyl ether sulfate, alkyl sulfate, α-olefin sulfonate, α-sulfo fatty acid salt, and α-sulfo salt. Fatty acid lower alkyl ester salts and fatty acid salts, and examples of the salts include alkali metal salts, alkaline earth metal salts, alkanolamine salts, and ammonium salts. In the present invention, alkylbenzene sulfonates, polyoxyalkylene alkyl ether sulfates having an average addition mole number of ethylene oxide of 0.5 to 5 and alkyl sulfates are preferred, and in particular, the alkyl chain has 8 to 14 carbon atoms. Alkyl benzene sulfonates are preferred.

<Other ingredients>
In the present invention, a surfactant other than the component (a), the component (b), and the component (c) may be contained for the purpose of enhancing the detergency, and an amphoteric surfactant is particularly preferable. The amphoteric surfactant is preferably a compound of the following general formula (2) (hereinafter referred to as component (d)).

[Wherein, R ^2a is an alkyl group or alkenyl group having 8 to 18, preferably 10 to 16, particularly preferably 10 to 14 carbon atoms, and R ^2c and R ^2d are alkyl groups or hydroxy groups having 1 to 3 carbon atoms. An ethyl group. R ^2b is an alkylene group having 1 to 5 carbon atoms, preferably 2 or 3 carbon atoms. A is a group selected from —COO—, —CONH—, —OCO—, —NHCO—, and —O—, and a represents a number of 0 or 1. ]

  In the present invention, it is preferable to add magnesium (hereinafter referred to as component (e)) for the purpose of improving the emulsifying power of the anionic surfactant and enhancing the cleaning effect. Component (e) is present in the composition as magnesium ions and / or magnesium in dissociation equilibrium. The content of component (e) is the sum of these. Magnesium is preferably blended as a salt, but may be blended as a counter ion for component (c) in some cases. In the present invention, it is particularly preferable to blend as magnesium sulfate, magnesium carbonate, magnesium nitrate, and magnesium acetate.

  In the present invention, a hydrotrope agent (hereinafter referred to as component (f)) may be contained for the purpose of improving storage stability, and toluenesulfonic acid, xylenesulfonic acid, cumenesulfonic acid and sodium or calcium salts thereof are preferred. In particular, p-toluenesulfonic acid is good.

  Polyoxyalkylene glycol (hereinafter referred to as component (g)) is effective in preventing gelation of the liquid detergent composition. Examples of the polyoxyalkylene glycol include polyethylene glycol and polypropylene glycol, and polypropylene glycol having a weight average molecular weight of 500 to 2000 is particularly preferable. The weight average molecular weight can be measured with a high performance liquid chromatograph mass spectrometer after being diluted 1000 times with methanol.

  In the liquid detergent composition of the present invention, the storage stability can be enhanced by blending a water-soluble solvent such as ethanol, propanol, glycerin, propylene glycol, ethylene glycol, or phenyl glycol.

  Moreover, a cleaning power improves by mix | blending organic acids, such as a citric acid, a succinic acid, ethylenediaminetetraacetic acid, methylglycine diacetate trisodium salt, or those alkali metal salts.

  Moreover, the liquid cleaning composition of this invention can mix | blend the compound known to mix | blend with a liquid detergent other than the said component to such an extent that the effect of this invention is not impaired. For example, a fragrance | flavor, antiseptic | preservative, a coloring agent, a viscosity modifier, etc. can be added to such an extent that the effect of this invention is not impaired.

  The balance of the liquid detergent composition of the present invention is water, most preferably ion-exchanged water.

<Liquid cleaning composition>
In the liquid detergent composition of the present invention, the total of the component (a) and the component (b) is 25 to 50% by mass, preferably 25 to 35% by mass. The mass ratio of the component (b) is (a) / (b) = 90/10 to 55/45, preferably 85/15 to 60/40, and more preferably 80/20 to 70/30.

  After satisfying the above, in the liquid detergent composition of the present invention, the component (a) is 12.5 to 60%, further 15 to 40% by mass, particularly 25 to 35% by mass, and the component (b) is 2 It is preferable from the point of a cleaning effect to contain-40 mass% and also 3-30 mass%. In particular, the content of diethylene glycol-2-ethylhexyl ether is preferably 2.5 to 25% by mass, more preferably 5 to 20% by mass, in the composition. The mass ratio of the component (a) to diethylene glycol-2-ethylhexyl ether (b ′) is preferably (a) / (b ′) = 90/10 to 55/45, more preferably 85/15 to 70/30.

  The content of the component (c) is preferably 0.1 to 5% by mass, and more preferably 2 to 3% by mass in the composition for the purpose of enhancing the cleaning effect. In addition, since the density | concentration in a composition changes with salt with respect to (c) component, in this invention, it shows not the salt but the form of an acid, ie, the density | concentration which replaced the salt with the hydrogen atom.

  The content of the component (d) is preferably 0.1 to 3% by mass, and more preferably 1 to 2% by mass in the composition for the purpose of enhancing the cleaning effect.

  The content of the component (e) is preferably 0.05 to 2% by mass and more preferably 0.1 to 1% by mass in the composition for the purpose of enhancing the cleaning effect.

  The content of the component (f) is preferably 0.1 to 3% by mass, and more preferably 2 to 3% by mass in the composition for the purpose of improving storage stability.

  The content of the component (g) is preferably 0.1 to 5% by mass and more preferably 1 to 3% by mass in the composition for the purpose of increasing the foaming power.

  The content of other components is arbitrary, but the hydrophobic compound such as a fragrance, particularly the hydrophobic organic solvent, is preferably 1% by mass or less in the composition. However, the hydrophobic compound of the present invention refers to a compound having a solubility in water of 0.1% by mass or less.

  The maximum cleaning power of the two components (a) and (b) is 75/25 by mass. However, when the component (c) is further added, an interaction occurs between these three components, and the detergency becomes maximum when the mass ratio of the components (a) and (b) is 85/15. Therefore, as the most preferable range of (a) / (b), the mass ratio (a) / (b) when not containing (c) component is 70 / 30-60 / 40, and (c) contains component When doing so, (a) / (b) is 90 / 10-80 / 20.

  The pH of the liquid detergent composition of the present invention is 6-8 at 25 ° C., more preferably 6-7. As the pH adjuster, an organic acid such as citric acid may be used, and the pH is adjusted with potassium hydroxide. Can do.

  Although the liquid detergent composition which used together the alkyl glycoside and the polyoxyalkylene alkyl ether which has 2-ethylhexyl group is described in patent document 4, the technique of this literature uses a hydrophobic organic solvent as the main cleaning base material. In order to stabilize the hydrophobic organic solvent, a specific surfactant is used, and as in the present invention, alkylglycoside is not used as a main cleaning base, and the cleaning mechanism is completely different. Is different.

  A liquid detergent composition was prepared using the components shown in Tables 1 to 3, and the following evaluation was performed. The results are shown in Tables 1-3.

<Cleaning rate measurement method>
The cleaning rate was measured according to the peanut test (JIS K 3370). That is, a set of polyethylene (PE) plates (= 6 sheets) having a length of 30 mm and a width of 80 mm was subjected to mass measurement (operation (1)). After that, the solution was mixed with a model oil of rapeseed oil / beef tallow = 1/9 (mass ratio) and chloroform mixed at a mass ratio of 1: 3 for 3 to 5 seconds, taken out, placed on a plate stand, and dried for one day. (Operation (2)). One set of PE plates was immersed in an aqueous solution obtained by diluting the compositions shown in Tables 1 and 3 to 0.45% by mass with 3.5 ° DH hard water, and washed for 1 minute using a washing motor at 1250 rpm. After washing, it was dried for one day, and the weight of one PE plate was measured (operation (3)). The cleaning rate was calculated by the following formula.

Mass after the operation of (1): Mass of one set of PE plates before cleaning and before adhesion of dirt
Mass after the operation in (2): Mass of one set of PE plates before cleaning and after adhesion of dirt
Mass after the operation of (3): Mass of one set of PE plates after cleaning and after adhesion of dirt

<Dish washing test method>
A model-contaminated dish was prepared by uniformly spreading 1 g of model oil stains on a ceramic dish, in which 0.1% by weight of a pigment (Sudan Red) was uniformly mixed with 49.95% each of salad oil and beef tallow. A commercially available sponge (115 mm × 75 mm × 35 mm, trade name: Kikuron, distributor: Kikuron Co., Ltd.) is rinsed with tap water and squeezed until the tap water content is 10 g, and then 1 g of the composition shown in Table 2 And 20 g of tap water was soaked. The sponge was scrubbed 2-3 times on the model-contaminated tableware, and the number of dishes that were washed (confirmed by the disappearance of the color attached to the tableware) was determined.

The components in the table are as follows.
AG: a mixture of alkyl groups having 10, 12 and 14 carbon atoms, and an alkyl polyglucoside having an average sugar condensation degree of glucose of 1.34. 2EH-OH: 2-ethyl-1-hexanol. 2EH-EO ₁ : ethylene glycol-2-ethylhexyl ether · 2EH-EO ₂ : diethylene glycol-2-ethylhexyl ether · 2EH-EO _mix : compound 2EH-EO ₃ , EO in which 3 mol of EO is added to 2-ethyl-1-hexanol 4 mol adduct was 2EH-EO _4, EO 5 mole added compound 2EH-EO _5, compound EO was allowed to 6 mole addition 2EH-EO _6, EO 7 mole added compound 2EH-EO ₇ was allowed Compound 2EH-EO ₈ to which 8 mol of EO was added and Compound 2EH-EO ₉ to which 9 mol of EO was added were respectively 31. 3: 28.7: 19.6: 11.2: 5.57: 2.36: 0.72 (mass ratio) mixed mixture LAS-Na: having a linear alkyl group having 10 to 14 carbon atoms Sodium alkylbenzene sulfonate (The values in the table are the compounding amounts in the acid form)
AO: N-lauryl-N, N dimethylamine oxide PTS-Na: sodium paratoluenesulfonate PPG-1000: polypropylene glycol (weight average molecular weight 1000)

Claims (1)

(A) one or more compounds selected from alkylglycoside, (b) 2-ethyl-1-hexanol, ethylene glycol-2-ethylhexyl ether and diethylene glycol-2-ethylhexyl ether, (c) anionic surfactant 0 .1～5 wt%, and contains water, (a) / (b) = 90 / 10~ 80/20 ( mass ratio), the liquid cleaning a (a) + (b) = 25~50 wt% Agent composition.