JP2006160869A - Liquid detergent composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-foaming liquid detergent composition having high detergency and good rinsing properties. <P>SOLUTION: The liquid detergent composition comprises (a) 5-30 mass% of an anionic surfactant, (b) 0.5-5 mass% of a magnesium salt and (c) 0.5-5 mass% of a higher fatty acid or its salt and is a liquid at 20°C. The component (c) is an 11-20C saturated and/or an 11-20C unsaturated higher fatty acids or salts thereof. The mass ratio of the saturated higher fatty acid/unsaturated higher fatty acid is preferably (10/90) to (3/97). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a liquid detergent composition having good detergency, low foaming properties and good rinsing properties, and a washing method using the same.

Cleaning compositions that improve rinsing properties have been proposed in the past. For example, Patent Documents 1 and 2 contain fatty acids (salts) based on anionic surfactants, and are excellent in rinsing properties and foaming properties. A cleaning composition is disclosed. It is also known that when a magnesium salt is contained, foamability and detergency are improved.
JP 2004-203989 A Japanese National Patent Publication No. 8-502095

  In general households, a cleaning method for cleaning tableware or the like with a sponge or the like to which a detergent is directly attached is employed, and the cleaning agent is required to have high foamability and foam persistence.

  On the other hand, washing method (dilution washing method) to wash tableware etc. in washing bath which added washing agent to water (hot water) stretched on sink like pre-washing by machine washing and business use such as large-scale cooking facilities ) Is required to have low foaming properties from the viewpoints of workability and rinsing properties.

  However, generally, if the foaming property is high and the detergency is high, the rinsing property is deteriorated. If an attempt is made to improve the rinsing property, the foaming property is low and the detergency is low.

  Therefore, the subject of this invention is providing the liquid cleaning composition which suppressed foaming power and improved the rinse property, and the washing | cleaning method using the same, maintaining high detergency.

  As a means for solving the problems, the present invention provides (a) an anionic surfactant in an amount of 5 to 30% by mass, (b) a magnesium salt in an amount of 0.5 to 5% by mass, and (c) a higher fatty acid or a salt thereof in an amount of 0. Provided is a liquid detergent composition that is 5 to 5% by mass and is liquid at 20 ° C.

  Moreover, this invention provides the washing | cleaning method which wash | cleans to-be-washed | cleaned material in the washing water bath containing the liquid cleaning composition in any one of Claims 1-4 as a solution of another subject.

  In the liquid detergent composition of the present invention, the foaming force is suppressed and the rinsing property is improved while maintaining a high detergency. For this reason, it is particularly suitable as a liquid detergent composition used in a dilution cleaning method.

<(A) component>
The component (a) anionic surfactant is a sulfonate type anionic surfactant such as linear alkylbenzene sulfonate, α-olefin sulfonate, alkane sulfonate, α-sulfo fatty acid salt, polyoxyethylene alkyl sulfate, etc. And sulfate ester type anionic surfactants such as alkyl sulfates. These can be used alone or in combination of two or more.

  (A) Content in the composition of a component is 5-30 mass%, Preferably it is 10-25 mass%, More preferably, it is 15-25 mass%.

<(B) component>
(B) The magnesium salt of a component can mention magnesium sulfate, magnesium chloride, etc., and can be used individually or in combination.

  The content of the component (b) in the composition is hydrate conversion (magnesium sulfate is heptahydrate, magnesium chloride is hexahydrate, and other magnesium salts are pentahydrate conversion). It is 5-5 mass%, Preferably it is 0.5-3 mass%, More preferably, it is 0.5-1.5 mass%. Within the above range, sufficient detergency and moderate viscosity can be expressed, and the stability of the composition can be enhanced.

<(C) component>
The higher fatty acid or salt thereof as component (c) is preferably a saturated and / or unsaturated higher fatty acid having 11 to 20 carbon atoms or a salt thereof, and a saturated and / or unsaturated higher fatty acid having 14 to 20 carbon atoms or a salt thereof. A salt is more preferable, a saturated and / or unsaturated higher fatty acid having 14 to 18 carbon atoms or a salt thereof is more preferable, and a liquid at 25 ° C. is particularly preferable from the viewpoint of product stability and handling of the compounding process.

  Examples of the salt include inorganic salts such as sodium, potassium, and magnesium, ammonium salts, and alkanolamine salts such as mono, di, and tri, but sodium salts are preferable. These higher fatty acid salts may be blended independently with a fatty acid and a base to form a fatty acid salt in the formulation system.

  (C) When a saturated higher fatty acid (salt) and an unsaturated higher fatty acid (salt) are used in combination as components, from the viewpoint of product stability of the liquid cleaning composition and handling of the blending process, saturated higher fatty acid / unsaturated higher fatty acid Is preferably 10/90 to 1/99, more preferably 8/92 to 1/99. Further, from the viewpoint of color and odor, the content of linoleic acid in the unsaturated fatty acid is preferably 10% by mass or less, and more preferably 5% by mass or less.

  (C) Content in the composition of a component is 0.5-5 mass%, Preferably it is 0.5-3 mass%, More preferably, it is 1-2 mass%. Within the above range, the foaming force is suppressed, so that the rinsing property is improved.

<Other ingredients>
A solvent, a hydrotrope agent, an antibacterial agent, a fragrance, a pigment, a dye, and the like can be added to the composition of the present invention as long as the problems of the present invention can be solved.

<Liquid cleaning composition>
The composition of the present invention is obtained by mixing the above-described components (a) to (c) and, if necessary, other components with water, and is liquid at 20 ° C. The water is preferably water from which hardness components such as calcium and magnesium present in trace amounts and heavy metals such as iron are removed, and ion-exchanged water or distilled water can be used. Further, a small amount of chlorine may be contained for the purpose of sterilizing or sterilizing water.

  The pH of the composition of the present invention is preferably 8.0 to 11.0 from the viewpoint of increasing the stability of the component (c) and increasing the stability of the composition, and 9.0 from the viewpoint of further increasing the cleaning performance. -10.0 is more preferable.

  As the pH adjuster, inorganic acids such as hydrochloric acid, sulfuric acid and phosphoric acid and organic acids such as citric acid, succinic acid, malic acid and lactic acid can be used as the acid agent. Sodium hydroxide, potassium hydroxide, sodium carbonate, Potassium carbonate or the like can be used as an alkali agent.

  The viscosity of the composition of the present invention (20 ° C .; measurement method is described in Examples) is preferably 1000 to 10,000 mPa · s, more preferably 1000 to 5000 mPa · s, and more preferably 2000 to 5000 mPa · s from the viewpoint of ease of use. Is more preferable.

<Washing method>
The cleaning method of the present invention is a cleaning method (dilution cleaning method) for cleaning an object to be cleaned in a cleaning water bath containing the liquid cleaning composition described above.

When applying a diluted cleaning method (a cleaning method for cleaning dishes, etc. in a cleaning bath in which water or hot water is added to the sink and a cleaning agent is added)
(I) A method of washing dishes such as dishes and cooking utensils in a washing bath containing detergent for an appropriate period of time and then washing the dishes etc. in the washing bath (dipping and dilution washing),
(II) A method of putting dishes to be cleaned, such as dishes and cooking utensils, into a washing bath that contains detergent without washing, and washing them (referred to as “immediate dilution washing” for comparison with soaking)
The cleaning method of the present invention can be applied to any dilution cleaning method. In any of the dilution cleaning methods, a flexible molded body such as a sponge or a cloth product such as a cloth can be used as necessary.

  In the cleaning method (dilution cleaning method) of the present invention, the concentration of the liquid detergent composition in the cleaning water bath is preferably 0.005 to 5% by mass, more preferably 0.01 to 1% by mass, and 0.01 to 0. More preferably, 2% by mass.

Examples and Comparative Examples Liquid cleaning compositions were prepared using the components shown in Table 1. The pH, viscosity, foaming power, detergency, and rinsing properties of these compositions were measured by the following methods. The results are shown in Table 1.

<PH>
The pH of the composition (stock solution) was measured at 25 ° C. using a pH meter F-23 manufactured by Horiba, Ltd., according to the pH measurement method of “JIS K 3362 8.3”.

<Viscosity>
The rotor type No. is added to the B-type viscometer model BM manufactured by TOKIMEC INC. Prepare one with 3 rotors. The liquid detergent composition of Table 1 is put into a beaker for viscosity measurement, and the temperature is sufficiently adjusted in a constant temperature water bath at 20 ° C. The beaker containing the composition is set in a viscometer, and the viscosity after 60 seconds is measured at a rotor rotational speed of 30 r / m.

<Foaming power>
The foaming power of a solution obtained by adding commercially available butter as a model soil to 0.1% by mass in a 0.5% by mass aqueous solution of each composition is measured. The measuring method is to put 40 mL of 0.5% by weight aqueous solution of the composition (German hardness 3.5 ° DH) and 20 Teflon (registered trademark) spheres having a diameter of 10 mm in a cylindrical glass container having a diameter of 50 mm and a height of 120 mm. The temperature was adjusted sufficiently in a constant temperature water bath at 20 ° C. Thereafter, 0.04 g of commercially available butter (manufactured by Snow Brand Co., Ltd., Hokkaido Butter) is added, the container is rotated (42 r / m) for 15 minutes, and immediately after stopping, the height of the bubble from the liquid level is measured. Note that a washing tester manufactured by Suga Test Instruments Co., Ltd. is used as the test apparatus.

<Detergent power (immediate dilution cleaning)>
In a plastic washing tub, 10 L of water (temperature 30 ° C., German hardness 3.5 ° DH) is stretched and 10 g (0.1% by mass) of the composition is dissolved and stirred well. Prepared model soiled dishes (5g of beef tallow / rapeseed oil = 1/1 (mass ratio) applied to a polypropylene dish and allowed to stand at room temperature for 24 hours) are immersed in a washing bowl Then, scrub with a new sponge (trade name Kikuron manufactured by Kikuron Co., Ltd., flexible absorber of 115 mm × 75 mm × 35 mm), and record the number of washings. The end of the cleaning is the end when the null tack disappears when touched with a finger.

<Rinse>
100 mL of an aqueous solution having a composition concentration of 0.25% by mass (temperature 20 ° C., German hardness 3.5 ° DH) is placed in a 500 mL separating funnel and shaken 30 times. The liquid is poured out, and then 40 mL of rinsing water (temperature 20 ° C., German hardness 3.5 ° DH) is gently poured in, and the liquid is poured out after slowly rotating the separatory funnel 10 times. This is repeated, and the number of times until the bubbles disappear is determined as the number of times of rinsing.

Claims (6)

  (A) 5-30% by mass of an anionic surfactant, (b) 0.5-5% by mass of a magnesium salt, and (c) 0.5-5% by mass of a higher fatty acid or salt thereof, 20 ° C. A liquid detergent composition that is liquid.   The liquid detergent composition according to claim 1, wherein the component (b) is magnesium chloride and / or magnesium sulfate.   The component (c) is a saturated and / or unsaturated higher fatty acid having 11 to 20 carbon atoms or a salt thereof, and the mass ratio of saturated higher fatty acid / unsaturated higher fatty acid is 10/90 to 3/97. Or the liquid cleaning composition of 2.   pH (25 degreeC) is 8.0-11.0, The liquid detergent composition in any one of Claims 1-3.   A cleaning method for cleaning an object to be cleaned in a cleaning water bath containing the liquid cleaning composition according to claim 1. The cleaning method according to claim 5, wherein the concentration of the liquid cleaning composition in the cleaning water bath is 0.005 to 5 mass%.