JP2008024831A - Detergent composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detergent composition with good store stability, showing excellent adsorption stability when the detergent composition is sprayed to oil stains on a vertical plane, an inclined surface, or a curved surface to thereby be capable of removing the oil stains effectively. <P>SOLUTION: The detergent composition which is a water soluble composition is characterized by comprising, based on the entire composition, 5-20 mass% of a linear alkyl benzene sulfonate as a component (A), 0.5-15 mass% of a strongly basic compound as a component (B), 1-15 mass% of a water soluble glycol ether solvent as a component (C), and balance water, and having pH≥12 at 25°C. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a cleaning composition that can effectively remove oil stains, and particularly exhibits excellent adhesion stability when the cleaning composition is sprayed onto oil stains on vertical, inclined, and curved surfaces. The present invention relates to a cleaning composition that can effectively remove oil stains.

  Conventionally, a number of cleaning agents have been developed to remove oil stains adhering to walls and stoves around kitchens, cooking utensils, cooking appliances, and the like. Since these oil stains are oxidized and denatured by heat and light, they become strong resinous, and the places where dirt adheres are often vertical surfaces, inclined surfaces, or curved surfaces. However, it was not possible to obtain a satisfactory cleaning effect for removing these oil stains.

  Therefore, it is known to use an organic thickener to increase viscosity. For example, Patent Document 1 discloses a detergent composition comprising a thickener and a filler as additional components in a detergent composition containing water, an inorganic alkali salt and a polyhydric alcohol (claim). 1); 100 parts by weight (parts by weight) of water, 1 to 40 parts by weight (parts by weight) of an inorganic alkali salt, 10 to 200 parts by weight (parts by weight) of a polyhydric alcohol and 0.01 to 30 parts by weight (by weight) A detergent composition comprising a thickener in part) (Claim 6); wherein the thickener is a natural polysaccharide or a derivative thereof. A cleaning composition (claim 7) is disclosed.

  It is also known to use an inorganic thickener to increase viscosity. For example, Patent Document 2 includes (A) 1.0 to 30.0 wt% (mass%) of a hydrophilic solvent, (B) 20.0 wt% (mass%) of a basic compound 1.0, and (C) A cleaning agent (Claim 2) containing 0.5 to 10.0% by weight (mass%) of a thickener as an essential component and having a viscosity of 50 to 5000 mPas at 25 ° C is disclosed. In addition, in the paragraph [0003] of Patent Document 2, “(C) the thickener is not particularly limited, and an organic thickener or an inorganic thickener can be used. Inorganic thickeners are preferable, and a stable thickening effect can be obtained.In particular, many inorganic thickeners are dark brown, and the appearance of the composition becomes dark, which is not preferable in appearance. In particular, inorganic thickeners represented by bee gum, bentonite, sepiolite, laponite, and aerosil can be used, and bentonite-based aluminum / magnesium / silicates are more preferable. There is also a description of “.

JP-A-9-111292 Patent Claim [Patent Document 1] Japanese Patent Laid-Open No. 8-170099 [Claims]

  However, the detergent composition as disclosed in Patent Document 1 is often an alkaline solution, and when an organic thickener is used, it is decomposed by long-term storage, and the viscosity gradually decreases. was there. Further, the cleaning agent as disclosed in Patent Document 2 functions as an abrasive because the inorganic thickener does not dissolve in the solution. There was a case where it was damaged. In addition, when a solvent or the like is added to enhance the cleaning power, there is a problem that separation occurs during storage.

  Therefore, the object of the present invention is to preserve the oil composition with excellent adhesion stability and effectively removing the oil stain when sprayed with the cleaning composition on the oil stain on the vertical surface, the inclined surface and the curved surface. An object of the present invention is to provide a cleaning composition having good stability.

Therefore, as a result of intensive studies by the present inventors in order to solve the above problems, a cleaning composition that can effectively remove oil stains on vertical surfaces, inclined surfaces, and curved surfaces has been found, and the present invention has been completed. It came to.
That is, the present invention is based on the total composition, 5-20% by mass of linear alkylbenzene sulfonate as component (A), 0.5-15% by mass of strongly basic compound as component (B), (C ) A water-soluble composition comprising 1 to 15% by weight of a water-soluble glycol ether type solvent as a component and the balance being water, and having a pH of 12 or more at 25 ° C. .

  The effect of the present invention is excellent storage stability when the cleaning composition is sprayed on vertical, inclined, and curved oil stains, and storage stability that can effectively remove oil stains. The present invention provides a good cleaning composition.

  In the cleaning composition of the present invention, the component (A) is a linear alkylbenzene sulfonate. Although there is no restriction | limiting in particular as a linear alkylbenzenesulfonate, As a group substituted to a benzene ring, a C8-C20 linear aliphatic hydrocarbon group is preferable, and a C8-C20 linear alkyl group is preferable. Is more preferable, and a linear alkyl group having 8 to 18 carbon atoms is still more preferable. If the carbon number of these substituents is less than 8, it may be inferior in detergency, and if it is greater than 20, it may be inferior in blending stability. In addition, as a salt (counter ion) of the linear alkylbenzene sulfonate of (A) component, an alkali metal salt is preferable and sodium salt and potassium salt are more preferable.

  The addition amount of the linear alkylbenzene sulfonate as the component (A) is usually 5 to 20% by mass, preferably 5 to 15% by mass with respect to the cleaning composition of the present invention. When the amount added is less than 5% by mass or more than 20% by mass, it will be described in detail later, but this is not preferable because viscosity and viscosity suitable for the cleaning composition of the present invention cannot be obtained.

  In the cleaning composition of the present invention, the component (B) is a strongly basic compound. Examples of the strongly basic compound include alkali metal hydroxides such as lithium hydroxide, sodium hydroxide, and potassium hydroxide. Among these, sodium hydroxide and potassium hydroxide can be preferably used. These strongly basic compounds may be used alone or in combination of two or more.

  (B) The addition amount of the strong basic compound of a component is 0.5-15 mass% normally with respect to the cleaning composition of this invention, Preferably it exists in the range of 5-15 mass%. By adding the component (B), the pH of the cleaning composition of the present invention can be 12 or more. When the added amount is less than 0.5% by mass, the pH may be less than 12, and the ability to clean stubborn oil stains is weakened. When the added amount is more than 15% by mass, the composition of the detergent composition is stable. This is not preferable because the properties deteriorate.

In the cleaning composition of the present invention, the component (C) is a water-soluble glycol ether type solvent. Examples of the water-soluble glycol ether solvent include diethylene glycol, polyethylene glycol, dipropylene glycol, dibutylene glycol, ethylene glycol monoalkyl (alkenyl) ether, ethylene glycol dialkyl (alkenyl) ether, diethylene glycol monoalkyl (alkenyl) ether, and propylene. Examples thereof include glycol monoalkyl (alkenyl) ether and dipropylene glycol monoalkyl (alkenyl) ether. Among them, those which can be preferably used are those represented by the following general formula (1):
R ¹ —O — (— R ² —O—) _n —H (1)

In the general formula (1), R ¹ represents an aliphatic hydrocarbon group having 1 to 5 carbon atoms. These groups include, for example, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, secondary butyl, tertiary butyl, pentyl, isopentyl, secondary pentyl, neopentyl, and tarsia. Examples thereof include alkyl groups such as a pentyl group; alkenyl groups such as a vinyl group, an allyl group, a propenyl group, an isopropenyl group, a butenyl group, an isobutenyl group, a pentenyl group, and an isopentenyl group. Among these, from the viewpoint of product stability, R ¹ is preferably an alkyl group having 1 to 5 carbon atoms, and more preferably an alkyl group having 1 to 3 carbon atoms.

In the general formula (1), R ² represents an alkylene group having 2 or 3 carbon atoms. Examples of these groups include an ethylene group, a propylene group, and an isopropylene group. Moreover, n represents the number of 1-5. In general formula (1), n groups represented by —R ² —O— are added to R ¹ O, and n —R ² —O— may be the same or different. Also good.

As a method for producing the compound represented by the general formula (1), 1 to 5 moles of ethylene oxide and / or propylene oxide may be added to the alcohol represented by R ¹ OH. Moreover, although the polymer obtained by these addition reactions can be used as it is for the cleaning composition of the present invention, those having a uniform molecular weight can also be used by purification such as distillation.

  Component (C) is added in an amount of usually 1 to 15% by mass, preferably 3 to 10% by mass, based on the cleaning composition of the present invention. If the addition amount is less than 1% by mass, the detergency is weak, and if it is more than 15% by mass, the viscosity decreases, which is not preferable.

  Here, the cleaning composition and viscosity of the present invention will be described in detail. Although the linear alkylbenzene sulfonate of (A) component is added in anticipation of the effect as a washing | cleaning component, it has a function as a viscosity regulator (thickener) other than that. In general, when a liquid cleaning agent is sprayed on a vertical surface such as a wall, if the viscosity of the cleaning agent is low, it hangs down from the wall surface and cannot be effectively cleaned. Therefore, attempts have been made to increase the viscosity of the cleaning composition to prevent dripping from the wall or the like. However, if the viscosity is too high, spraying with a spray or the like may be difficult. Therefore, a detergent composition having a thixotropic viscosity that has a low viscosity during spraying or coating and a high viscosity when attached to a wall surface or the like is excellent for cleaning vertical surfaces such as walls. Normally, various thickeners are used to obtain such a viscosity. For example, a high-molecular-weight thickener such as xanthan gum is easily decomposed in a highly alkaline aqueous solution, so that the viscosity is lowered during storage. There is. In addition, known inorganic thickeners, such as bentonite, do not dissolve in an aqueous solution, and therefore, there are problems such as separation during storage and damage to the cleaning object by acting as an abrasive.

Here, the present inventors have found that by adjusting the linear alkylbenzene sulfonate of the component (A), which is a cleaning component, to a certain concentration range, a thixotropic viscosity is imparted to the cleaning composition. In order to make a system of an aqueous solution containing a highly basic and water-soluble glycol ether type solvent thixotropic using a linear alkylbenzene sulfonate, the linear alkylbenzene sulfonate contained in the detergent composition The relationship between the mass of water and the mass of water is expressed by the following formula (1)
0.05 ≦ (linear alkylbenzene sulfonate / water) ≦ 0.5 (1)
It is preferable that If the value of the linear alkylbenzene sulfonate / water is less than 0.05 or greater than 0.5, the detergent composition will not thicken, or it will be too thick and difficult to spray with a spray etc. Or the viscosity may not be thixotropic.

  In addition, the linear alkylbenzene sulfonate of the component (A) is an anionic surfactant, and other anionic surfactants include, for example, aliphatic monocarboxylates, N-acyl sarcosine salts, N-acyls. Carboxylic acid type such as glutamate; dialkylsulfosuccinate, alkanesulfonate, α-olefinsulfonate, branched alkylbenzenesulfonate, alkylnaphthalenesulfonate, naphthalenesulfonate-formaldehyde condensate, N-methyl -Sulfonic acid type such as N-acyl tauric acid; sulfate type such as alkyl sulfate, polyoxyethylene alkyl ether sulfate, oil fatty acid ester salt; alkyl phosphate ester salt, polyoxyethylene alkyl ether phosphate ester salt, Polyoxyethylene alkyl phen Although phosphate ester types such as ruether phosphate ester salts are known, even if the above anionic surfactant is used instead of component (A), a strongly basic compound as component (B) An aqueous solution containing a water-soluble glycol ether type solvent as component (C) and having a pH of 12 or higher cannot be made thixotropic. Similarly, a detergent composition having thixotropic properties cannot be obtained even when a cationic surfactant, an amphoteric surfactant or a nonionic cationic surfactant is used in place of the component (A).

  In addition, anionic surfactants other than a cationic surfactant and / or (A) component can also be mix | blended with the cleaning composition of this invention as another arbitrary component. However, even if the component (A), the component (B), and the component (C) are blended in the ratio of the present invention, as other optional components, an anionic surfactant other than the cationic surfactant and / or the component (A) When the total amount of the agent is 1% by mass or more, the viscosity does not become thixotropic. Preferably, as other optional components, the total amount of the cationic surfactant and the anionic surfactant other than the component (A) is 0. .5% by mass or less is preferable.

  The cleaning composition of the present invention has a thixotropic viscosity, but the thixotropic property is such that when a liquid is flowed by applying stress, the greater the stress is, the lower the viscosity of the liquid is. That is. There are various methods for measuring thixotropy. As a simple method, a method is known in which the viscosity is measured by changing the rotation speed of a B-type viscometer and the viscosity is judged from the result.

In the cleaning composition of the present invention, the relationship between the viscosity at 6 rpm measured by a B-type viscometer at 25 ° C. and the viscosity at 60 rpm is the following formula (2):
(25 ° C., 6 rpm viscosity) / (25 ° C., 60 rpm viscosity) ≧ 2 (2)
Is preferred. Furthermore, the viscosity of 6 rpm at 25 ° C. is preferably 50 to 5000 mPa · s, and more preferably 100 to 3000 mPa · s. In addition, when the density | concentration of the linear alkylbenzenesulfonate of (A) component exceeds 20 mass%, the viscosity by the said measurement may exceed 5000 mPa * s. Here, when the viscosity of 6 rpm at 25 ° C. is lower than 50 mPa · s, the viscosity is too low and the cleaning composition attached to the cleaning surface such as the wall may sag. The viscosity of 6 rpm at 25 ° C. is 5000 mPa · s. If it is larger, it may be difficult to spray with a spray or the like, which is not preferable.

  In the cleaning composition of the present invention, a nonionic surfactant, an amphoteric surfactant, a chelating agent, a builder, and a component (C) are added to the above-described components as necessary in the range not impairing the object of the present invention. Other solvents, pigments, fragrances, preservatives, solubilizers, and the like can be blended.

  Nonionic surfactants include, for example, higher alcohol ethylene oxide adducts, alkylphenol ethylene oxide adducts, fatty acid ethylene oxide adducts, polyhydric alcohol fatty acid ester ethylene oxide adducts, higher alkylamine ethylene oxide adducts, fatty acid alkanolamide ethylenes. Oxide adducts, fat and oil ethylene oxide adducts, ethylene oxide / propylene oxide block copolymers, ethylene oxide / propylene oxide / butylene oxide copolymers, glycerol fatty acid esters, pentaerythritol fatty acid esters, sorbitol fatty acid esters, Fatty acid ester of sorbitan, fatty acid ester of sucrose, alkyl ether of polyhydric alcohol, alkanolamines Fatty acid amides, further higher alcohols, alkylphenols, fatty acids, polyhydric alcohols, higher alkyl amines, fatty acid amides, polymers and the like by addition polymerization of ethylene oxide to active hydrogen-containing compound such as fat or fatty acid alkanolamides.

  Examples of amphoteric surfactants include betaine surfactants such as alkyldimethylaminoacetic acid betaine and fatty acid amidopropyl betaine.

  When the surfactant is added, the detergency may be increased, and it is preferably 0.1 to 8% by mass, more preferably 0.5 to 5% by mass with respect to the detergent composition of the present invention. preferable. It is not preferable to add more than 8% by mass of the surfactant because the viscosity may not be thixotropic. In addition, even if this surfactant is added in an amount less than 0.1% by mass, the effect of increasing the detergency is not exhibited, and there is a case where the addition effect is not obtained.

  Examples of the chelating agent and builder include sodium silicates such as sodium orthosilicate and sodium metasilicate; potassium silicates such as ortho potassium silicate and potassium metasilicate; sodium phosphates such as sodium orthophosphate and sodium tripolyphosphate; Potassium phosphates such as potassium phosphate and potassium tripolyphosphate; inorganics such as zeolite and sodium carbonate; polycarboxylic acids such as alkali metal salts or lower amine salts such as polyacrylic acid and polymaleic acid; nitrilotriacetic acid and alkali metal salts thereof Aminocarboxylic acids such as ethylenediaminetetraacetic acid and alkali metal salts thereof, ethylenediaminediacetic acid and alkali metal salts thereof, triethylenetetramine hexaacetic acid and alkali metal salts thereof; malic acid, citric acid, glyconic acid, gluco Oxycarboxylic acids and alkali metal salts and lower amine salts thereof such as Easthampton acid.

  These chelating agents and builders are preferably added in an amount of 0.01 to 8% by mass, more preferably 0.1 to 5% by mass, with respect to the cleaning composition of the present invention. If the chelating agent or builder is added in an amount of more than 8% by mass, the storage stability of the cleaning composition of the present invention is deteriorated and may be separated over time, which is not preferable. In addition, even if it adds a chelating agent and a builder in the quantity less than 0.01 mass%, those addition effects may not express.

  Examples of the solvent other than the component (C) include lower alcohols such as ethanol, propanol and butanol, glycols such as ethylene glycol, propylene glycol and butylene glycol, polyols such as glycerin, polyglycerin and sorbitol, and monoethanolamine. , Alkanolamines such as diethanolamine, triethanolamine, monopropanolamine, dipropanolamine, and tripropanolamine. These solvents are preferably added in an amount of 0.1 to 10% by mass, more preferably 0.1 to 8% by mass, based on the cleaning composition of the present invention. If the addition amount of the solvent is less than 0.1% by mass, the cleaning effect as a solvent may not be exhibited, and if it exceeds 10% by mass, the viscosity may not be thixotropic.

  The method of using the cleaning composition of the present invention is used by discharging from a spraying device, but can be used by any conventionally known method. For example, the cleaning composition of the present invention is used. After applying and brushing, dirt can be removed by wiping or washing away. Examples of the application method include a method of soaking in a cloth or brush and applying and washing as it is, a method of applying by spraying with a spraying device such as a trigger sprayer or a mechanical sprayer, etc. Since the cleaning composition is highly alkaline, it is preferably applied to the object to be cleaned using a spraying device that is less likely to directly touch the human body.

Hereinafter, the present invention will be specifically described by way of examples. In the following examples and the like, “%” and “ppm” are based on mass unless otherwise specified.
First, the following shows five test methods for the evaluation method of the cleaning composition, and Table 1 shows the composition of the cleaning composition and the test results thereof.
<Cleaning test on horizontal surface>
0.1 g of soybean oil was applied to a 10 cm × 8 cm stainless steel plate and baked at 200 ° C. for 3 hours. This stainless steel plate was immersed in 25 ml of various liquid detergent compositions, allowed to stand for 10 minutes for washing, then lightly rinsed with water and dried. The washing rate before and after this washing was calculated from the change in the mass of the stainless steel plate, and was shown on the following scale.
Cleaning rate 100% to 80% or more: ◎
Cleaning rate of less than 80% to 60% or more: ○
Cleaning rate of less than 60% to 40% or more:
Cleaning rate less than 40%: ×

<Cleaning test on vertical surface>
0.1 g of soybean oil was applied to a 10 cm × 8 cm stainless steel plate and baked at 200 ° C. for 3 hours. Various liquid detergent compositions were sprayed 5 times (about 1 ml / time) on a stainless steel plate in a vertical state, left to wash for 10 minutes, then rinsed lightly with water and dried. The cleaning rate before and after this cleaning was calculated from the change in mass of the stainless steel plate, and was shown on the following scale.
Cleaning rate 100% to 80% or more: ◎
Cleaning rate of less than 80% to 60% or more: ○
Cleaning rate of less than 60% to 40% or more:
Cleaning rate less than 40%: ×

<Adhesion test on vertical surface>
Various liquid detergent compositions were sprayed once (about 1 ml / time) on a 10 cm × 8 cm stainless steel plate in a vertical state, and then left for 10 minutes. The dripping cleaning composition was removed, and the cleaning agent residual ratio of the cleaning composition remaining on the stainless steel plate was calculated by mass change, and was shown on the following scale.
Residual rate 100% to 80% or more: ◎
Residual rate less than 80% to 60% or more: ○
Residual rate less than 60% to 40% or more:
Residual rate less than 40%: ×

<Storage stability test>
Various liquid detergent compositions were put in a polypropylene container and the stability when stored at 40 ° C. for 6 months was evaluated according to the following criteria.
No change in appearance (precipitation, separation, etc.) and less than 5% viscosity change: ◎
No change in appearance (precipitation, separation, etc.) and viscosity change of less than 5-10%: ○
There is a slight change in appearance (precipitation, separation, etc.), or a viscosity change of less than 10-30%: Δ
Appearance change (precipitation, separation, etc.) is remarkable, or viscosity change is 30% or more: ×

<Dischargeability test>
A trigger type sprayer (Kalmer, TS800-3) was filled with various liquid detergent compositions, and the trigger was stroked 10 times. The ejection properties at that time were evaluated according to the following criteria.
Stroke without any resistance, and can evenly discharge the cleaning composition: ◎
Stroke can be done almost without resistance, and the cleaning composition can be discharged uniformly.
There is some resistance to the stroke, making continuous spraying difficult: △
There is considerable resistance to the stroke and continuous spraying is not possible.

  The cleaning composition of the present invention can be suitably used for kitchens, commercial kitchens, cooking utensils, cooking equipment, tableware and the like. Among these, it is effective for cleaning the inside of cooking appliances such as vertical surfaces, inclined surfaces, curved surfaces, ovens, microwave ovens, etc.

Claims (7)

  5 to 20% by mass of linear alkylbenzene sulfonate as component (A), 0.5 to 15% by mass of strongly basic compound as component (B), and water-soluble glycol as component (C) with respect to the entire composition A detergent composition, wherein the composition is an aqueous composition comprising 1 to 15% by mass of an ether type solvent and the balance is water, and the pH at 25 ° C. is 12 or more. The relationship between the mass of the linear alkylbenzene sulfonate of component (A) contained in the cleaning composition and the mass of water is expressed by the following formula (1).
0.05 ≦ (linear alkylbenzene sulfonate / water) ≦ 0.5 (1)
The cleaning composition according to claim 1, wherein   (B) The cleaning composition of Claim 1 or 2 whose strong basic compound of a component is sodium hydroxide and / or potassium hydroxide. The water-soluble glycol ether solvent of component (C) is represented by the following general formula (1)
R ¹ —O — (— R ² —O—) _n —H (1)
(In the formula, R ¹ represents an aliphatic hydrocarbon group having 1 to 5 carbon atoms, R ² represents an alkylene group having 2 or 3 carbon atoms, n represents a number of 1 to 5, and n R ² may be the same or different)
The cleaning composition of any one of Claims 1 thru | or 3 which is a compound represented by these.   The cationic surfactant and / or an anionic surfactant other than the component (A) is contained in a total amount in an amount of less than 1% by mass with respect to the entire composition. Cleaning composition.   Further, one or more compounds selected from the group consisting of nonionic surfactants, amphoteric surfactants, chelating agents, builders, solvents other than component (B), dyes, fragrances, preservatives and solubilizers The cleaning composition of any one of Claim 1 thru | or 5 containing this.   A method for using a cleaning composition, wherein the cleaning composition according to any one of claims 1 to 6 is used after being discharged from a spraying device.