JP2007039627A - Detergent composition for hard surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detergent composition for hard surface, widely usable for various stains on a hard surface, having small pH variation, exhibiting stable dissolving and removing power to the stains even by the cleaning at a low temperature, considerably improving the rate-determining rinsing property, reducing the load on the environment and having high safety, and provide a method for cleaning a hard surface by using the detergent composition. <P>SOLUTION: The invention provides (1) a detergent composition for hard surface containing an alkyl glycoside, a glyceryl ether, a hydrocarbon and water and (2) a method for cleaning a hard surface by using the above detergent composition. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cleaning composition for hard surfaces, and more specifically, is present on the surface of a hard member such as precision parts, jigs, metals, glass, ceramics, and plastics (hereinafter sometimes referred to simply as a hard surface). The present invention relates to a hard surface detergent composition (hereinafter, sometimes simply referred to as a detergent composition) which is excellent in the dissolution / removal property and rinsing property of soil, and has high safety. The present invention also relates to a method for cleaning a hard surface using the cleaning composition.

  Conventionally, removal of dirt components mainly composed of organic substances such as oil, machine oil, cutting oil, grease, liquid crystal, rosin wax, etc. present on the surface of hard parts such as jigs and tools used in precision parts or assembly processes Uses chlorine-based solvents such as trichloroethane and tetrachloroethylene, fluorocarbon solvents such as trichlorofluoroethane, alkaline detergents containing surfactants and builders in sodium orthosilicate and caustic soda, and low-boiling hydrocarbon solvents. Has been. However, chlorine-based and chlorofluorocarbon-based solvents have problems in terms of safety, toxicity, work environment and environmental pollution, and alkaline cleaners remain on the surface of objects to be cleaned when used for precision parts. Then, there were concerns that it would adversely affect plastic parts, etc., and there were concerns that electrical characteristics would be extremely adversely affected in electrical and electronic parts.

  In order to solve this problem, for example, a detergent composition comprising an alkyl glyceryl ether and octadecene and / or water (Patent Document 1), a detergent composition containing a specific alkyl polyglucoside (Patent Document 2), an alkyl glycoside And a detergent composition comprising an alkyl polyglyceryl ether (Patent Document 3).

  On the other hand, alkaline cleaning agents have been widely used for cleaning surfaces of hard members such as metal, glass, ceramics, and plastics. In the field where an alkaline cleaning agent is used, in order to improve the cleaning performance, cleaning is often performed at a cleaning temperature higher than room temperature. For example, when steel plates (steel strips) are continuously washed in steelworks, the cleaning equipment is usually configured to continuously wash the steel plates (steel strips) wound in a coil shape, and 30 to 1100 m. The cleaning time of the steel sheet is a few seconds at maximum and is extremely short. Therefore, the cleaning agent for steel sheet is generally used at a cleaning temperature of 60 to 80 ° C. in order to remove oil adhering to the steel sheet surface in a short time.

Examples of the hard surface cleaning composition as described above include an alkaline cleaning composition containing a polyglyceryl ether type nonionic surfactant and an alkaline agent (Patent Document 4), glyceryl ether, terpene hydrocarbon, and surfactant. An alkaline detergent composition containing an agent and an alkaline agent (Patent Document 5) is disclosed.
JP-A-6-346092 JP-A-8-319497 Japanese Patent Laid-Open No. 3-17496 Japanese Patent Laid-Open No. 5-194999 JP 11-256200 A

  None of the cleaning compositions disclosed in Patent Documents 1 to 3 have a sufficiently satisfactory effect in terms of rinsing properties and repeated cleaning properties required for industrial cleaning agents.

  In addition, as a cleaning method using these cleaning composition, first, cleaning is performed with a cleaning agent stock solution or a cleaning solution diluted with water, followed by rinsing with water as a rinsing step, and then a drying step. This is a common cleaning method.

  Furthermore, recently, the precision of processing of precision parts has been improved, so that there are a lot of irregularities, the gaps of the recesses are very narrow, and the time required for the cleaning process tends to be further shortened due to the improvement in productivity.

  In particular, with respect to the removal of liquid crystal stains, with the thinning of the liquid crystal display panel, the gap interval of the liquid crystal cell becomes narrower and it becomes more difficult to clean the liquid crystal existing between the gaps. When the conventional cleaning composition as described above is used against such liquid crystal stains, the cleaning properties of the liquid crystals existing between the gaps are insufficient even if the cleaning properties of the liquid crystals existing on the surface are good. Met.

  From these facts, the solubility of various oil stains (especially narrow gaps in precision parts, dirt adhering to recesses) present on the surface of hard parts such as precision tools or parts used in assembly processes, A cleaning agent that has excellent removability and does not require time for rinsing has been desired.

  On the other hand, the cleaning compositions disclosed in Patent Documents 4 and 5 are not sufficient in terms of repeated cleaning performance and low foamability under low temperature (50 ° C. or lower) and short cleaning conditions.

  Further, when cleaning is performed for a long time using the conventional cleaning composition as described above, the pH is likely to decrease. For example, when a cleaning composition having a decreased pH is used for precision parts including aluminum, aluminum Corrosion of the water may cause a problem, and it is necessary to replace the cleaning liquid even if the cleaning power itself is not significantly reduced. In addition, the decrease in pH brings about a decrease in detergency beyond the normally considered decrease in detergency, and it may be necessary to accelerate the cleaning liquid replacement cycle.

  Therefore, the present invention can be used universally for various stains on a hard surface, has a small pH fluctuation, and exhibits stable solubility and removal for these stains even at low temperature cleaning, In particular, it provides a highly safe cleaning composition for hard surfaces, which can greatly improve the rinsing performance, which has been rate-limiting until now, and can reduce the burden on the environment, as well as a method for cleaning hard surfaces using the cleaning composition. The purpose is to do.

That is, the gist of the present invention is as follows.
[1] A hard surface cleaning composition containing an alkyl glycoside, glyceryl ether, hydrocarbon and water, and [2] a method of cleaning a hard surface using the cleaning composition according to [1],
About.

  According to the present invention, it can be used universally for various types of dirt on a hard surface, has a small pH fluctuation, exhibits stable solubility and removal for these dirt even at low temperature cleaning, and It can greatly improve the rinsing performance, which has been rate-limiting until now, and can reduce the burden on the environment and provide a highly safe cleaning composition for hard surfaces, precision parts, jigs and tools, metal, It is possible to provide a hard surface cleaning method capable of safely cleaning the surface of a hard member such as glass, ceramic, or plastic.

  The cleaning composition of the present invention contains an alkyl glycoside, glyceryl ether, hydrocarbon and water, and is characterized by using these four components in combination.

  In particular, in the present invention, by combining an alkyl glycoside and glyceryl ether, hydrocarbons that are not inherently soluble in water can be dispersed even in a high water content region. Therefore, it is possible to dissolve and remove oily dirt existing on the hard surface even at a high water content, not only greatly reducing the cost of the cleaning agent, but also considering flammability compared to conventional cleaning agents. It becomes easier to handle without the need for strict moisture management.

  In addition, the conventional water-based cleaning agent containing hydrocarbons has a large load during rinsing to wash away the cleaning agent component adhering to the object to be cleaned and the reattached oily soil, but the cleaning composition of the present invention is used. This makes rinsing much easier.

  Furthermore, the cleaning composition of the present invention can clean the liquid crystal existing between the gaps of the liquid crystal cell, and can also clean the liquid crystal stains existing in the narrow liquid crystal cell between the gaps, which has been difficult to clean conventionally. An effect is produced.

  The cleaning composition of the present invention has a sufficient hard surface cleaning property even at a low temperature, but also exhibits a cleaning property superior to the known cleaning agent described above even at a temperature higher than 50 ° C.

《Cleaning target》
The hard surface to be cleaned in the present invention refers to the surface of a hard member such as precision parts, jigs and tools, metal, glass, ceramics, and plastic that are objects to be cleaned.

  In the present invention, the precision parts refer to electronic parts, metal parts, electric parts, resin processed parts, optical parts, and the like, for example. Examples of the electronic component include a liquid crystal panel, a semiconductor package, a printed wiring board, an IC lead, a semiconductor material such as silicone or a ceramic wafer, and a crystal resonator. Examples of the metal parts include bearings used in precision drive devices, plastic processed articles such as deep pots and cans of electronic pots and electronic jars, and the like. Examples of the electric parts include electric motor parts such as brushes, rotors, and housings. Examples of the resin processed product include precision resin processed parts used for cameras and automobiles. Examples of optical components include cameras, glasses, and lenses used in optical equipment.

  In the present invention, the jigs and tools mean jigs, tools, various devices that handle precision parts, parts thereof, and the like used in various processes such as manufacturing, processing, assembly, and finishing of the above-described precision parts.

《Removal target》
The main removal target of the cleaning composition of the present invention is various stains such as liquid crystal, oil components, and flux (residue generated during soldering) adhering to the hard surface. The cleaning composition of the present invention particularly includes liquid crystal stains existing in the gap of the liquid crystal panel, flux remaining on the semiconductor package or printed wiring board, processing oil adhering to the surface after cutting the silicon ingot, and plastic processing of metal parts. Occasionally it exhibits high cleaning performance against processing oil adhering to the surface. Furthermore, it exhibits high detergency even against dirt in which metal powder, inorganic powder, moisture, etc. are mixed in these removal targets.

《Alkyl glycoside》
The alkyl glycoside used in the present invention has the following general formula (1):
R ¹ (OR ² ) _x G _y (1)
[Wherein, R ¹ represents a linear or branched alkyl group having 8 to 18 carbon atoms, an alkenyl group, or an alkylphenyl group, R ² represents an alkylene group having 2 to 4 carbon atoms, and G represents a carbon number. The residue derived from the reducing sugar which has 5-6 is shown, x (average value) shows 0-5, y (average value) shows 1-5].

In the formula, x is preferably 0 to 2, more preferably 0. y is preferably 1 to 1.5, more preferably 1 to 1.4. The carbon number of R ¹ is preferably 9 to 16, more preferably 10 to 14, from the viewpoint of detergency. R ² is preferably an ethylene group. The structure of G is determined by the monosaccharide or polysaccharide used as a raw material, and examples of the monosaccharide include glucose, galactose, xylose, mannose, lyxose, arabinose, and a mixture thereof. Examples thereof include maltose, xylobiose, isomaltose, cellobiose, gentibiose, lactose, sucrose, nigerose, turanose, raffinose, gentianose, merezitose, and mixtures thereof. Among these, as the monosaccharide, glucose or fructose is preferable from the viewpoint of availability and low cost, and as the polysaccharide, maltose or sucrose is preferable. X and y are determined by proton ( ¹ H) NMR.

  The alkyl glycoside is not particularly limited as long as it satisfies the general formula (1). For example, from the viewpoint of obtaining high detergency, alkyl polyglucoside is preferable. Among them, decyl polyglucoside, dodecyl polyglucoside, More preferred is myristyl polyglucoside.

  Here, the alkylpolyglucoside refers to an alkyl glycoside in which G is a residue derived from glucose and y is 1 or more in the general formula (1), and includes, for example, a monosaccharide or a polysaccharide as its structure. Things.

  The ratio of the alkyl glycoside to the total amount of the alkyl glycoside, glyceryl ether and hydrocarbon is preferably 20 to 80% by weight, more preferably 30 to 75% by weight, and further preferably 40 to 70% by weight from the viewpoint of obtaining high rinsability. Preferably, 40 to 65% by weight is even more preferred, and 40 to 62% by weight is even more preferred.

<Glyceryl ether>
The glyceryl ether used in the present invention is a linear or branched alkyl group or alkenyl group having 4 to 12 carbon atoms from the viewpoint of maintaining a uniform and transparent product property within the operating temperature range without degrading the detergency. For example, n-butyl group, isobutyl group, n-hexyl group, isohexyl group, n-heptyl group, n-octyl group, 2-ethylhexyl group, n-nonyl group, n-decyl group, etc. Those having an alkyl group having 4 to 12 carbon atoms are preferred, and those having 1 or 2 and especially 1 alkyl group having 5 to 10 carbon atoms and 5 to 8 carbon atoms are more preferred. Furthermore, the glyceryl ether used in the present invention may be a monoalkyl diglyceryl ether or a monoalkyl polyglyceryl ether in which two or more, preferably 2-3 glyceryl groups are connected by an ether bond. Among these, monoalkyl glyceryl ether and monoalkyl diglyceryl ether are preferable from the viewpoint of more excellent removability against liquid crystal stains. Among them, more preferable glyceryl ether is 2-ethylhexyl glyceryl ether. These glyceryl ethers may be used alone or in admixture of two or more. In the present invention, by using such glyceryl ether, the dispersibility between the organic solvent and water can be stabilized, so that there is an advantage that more oily stains and / or liquid crystal stains can be washed. .

  The ratio of glyceryl ether to the total amount of alkylglycoside, glyceryl ether and hydrocarbon is preferably 2 to 70% by weight from the viewpoint of stabilizing the dispersion of hydrocarbon and water and achieving both high detergency and rinsing properties. 2.5 to 65% by weight is more preferable, and 3 to 60% by weight is more preferable. In addition, from the viewpoint of maintaining good oil / water separation properties of the cleaning composition, the proportion is preferably 5 to 30% by weight, more preferably 8 to 20% by weight, and even more preferably 10 to 18% by weight. Oil-water separability refers to the ability to separate free water or free oil from an oil-water mixture. If oil-water separability is good, the oil content in the wastewater can be reduced, so the load during wastewater treatment can be reduced. The effect is played.

  In the cleaning composition of the present invention, the weight ratio of alkyl glycoside / glyceryl ether (alkyl glycoside / glyceryl ether) is preferably 0.28 to 40. Among them, the weight ratio of alkylglycoside / glyceryl ether is preferably 20 or less from the viewpoint of suppressing foaming properties during washing, and 0.5 or more is preferable from the viewpoint of stably dispersing hydrocarbon and water. Moreover, 1-10 are preferable, 2-7 are more preferable, and 3-6 are more preferable from the viewpoint of maintaining the oil-water separability of a cleaning composition favorable. Accordingly, the weight ratio of alkyl glycoside / glyceryl ether is more preferably 0.5-20, even more preferably 0.75-20, even more preferably 0.75-17, even more preferably 1-10, even more. Preferably it is 2-7, More preferably, it is 3-6.

"hydrocarbon"
The hydrocarbon used in the present invention is preferably an olefinic hydrocarbon and / or a paraffinic hydrocarbon. As the olefinic hydrocarbon and paraffinic hydrocarbon, a compound having 10 to 18 carbon atoms, preferably 10 to 14 carbon atoms, is preferable. Straight chain or branched chain saturated or unsaturated hydrocarbons; cycloaliphatic hydrocarbons such as cyclo compounds such as cyclodecane and cyclododecene, and the like. Of these, a saturated or unsaturated hydrocarbon having 10 to 18 carbon atoms, preferably 10 to 14 carbon atoms is preferable, and an olefinic hydrocarbon is more preferable. These hydrocarbons may be used alone or in admixture of two or more.

  In the present invention, in addition to the olefinic hydrocarbon and the paraffinic hydrocarbon, an aromatic hydrocarbon such as an alkylbenzene such as nonylbenzene and dodecylbenzene, a naphthalene compound such as methylnaphthalene and dimethylnaphthalene may be used. it can.

  The ratio of hydrocarbon to the total amount of alkylglycoside, glyceryl ether and hydrocarbon is preferably 3 to 50% by weight from the viewpoint of stabilizing the dispersion of hydrocarbon and water and achieving both high detergency and rinsing properties. 5 to 50% by weight is more preferred, 7.5 to 50% by weight is more preferred, 7.5 to 45% by weight is even more preferred, and 10 to 45% by weight is even more preferred.

《Preferable combination》
Further, in the present invention, as a preferred combination of alkyl glycoside, glyceryl ether and hydrocarbon, alkyl glycoside is decyl polyglucoside and / or dodecyl polyglucoside, glyceryl ether is 2-ethylhexyl glyceryl ether and / or hexyl glyceryl ether. And a combination in which the hydrocarbon is at least one selected from the group consisting of decene, dodecene, tetradecene, decane, dodecane and tetradecane.

《Alkaline agent》
The cleaning composition of the present invention can not only lower the surface tension than alkylglycoside alone and increase the permeation / solubility of oil stains but also maintain the emulsifying power and ease of rinsing with alkylglycoside, From the viewpoint of further improving the cleanability of hard surfaces such as metal, glass, ceramics, and plastics, it is preferable to contain an alkali agent. As a result, the cleaning composition of the present invention can dissolve and remove oil efficiently in a very short time at a low temperature, and is an industrial cleaning agent that requires repeated cleaning and low foaming properties, It is useful in the field of detergents for steel plates such as steel plates that require degreasing properties in a short time. As the alkaline agent used in the present invention, any water-soluble alkaline agent can be used. Specific examples include hydroxides of alkali metals such as sodium hydroxide, potassium hydroxide and sodium silicate, and amines such as ammonia, diamine and alkanolamines. From the viewpoint of degreasing properties, sodium hydroxide and Potassium hydroxide is preferred. These alkali agents may be used alone or in admixture of two or more.

  The content of the alkaline agent is preferably 50 to 700 parts by weight, more preferably 100 to 600 parts by weight, with the total content of alkylglycoside, glyceryl ether and hydrocarbon being 100 parts by weight, from the viewpoint of detergency and economy. Preferably, 150 to 550 parts by weight is more preferable, and 200 to 500 parts by weight is even more preferable. On the other hand, when the cleaning composition is used for cleaning the copper plate, the content of the alkaline agent is 100 parts by weight of the total content of alkylglycoside, glyceryl ether and hydrocarbon, from the viewpoint of detergency and prevention of discoloration. 0.1-20 weight part is preferable, 0.3-17 weight part is more preferable, 0.5-15 weight part is further more preferable, 0.7-13 weight part is still more preferable.

  The pH of the cleaning composition of the present invention can be appropriately set depending on the object to be cleaned. Among them, when the cleaning composition of the present invention is used for cleaning rolling oil or the like attached to the copper plate surface, From the viewpoint of improving the cleanability of the copper plate surface, it is preferably 4 to 12, more preferably 7 to 12, and still more preferably 9 to 12. The pH is adjusted, for example, with inorganic acids such as hydrochloric acid and nitric acid, organic acids such as acetic acid and citric acid, inorganic alkalis such as sodium hydroxide and potassium hydroxide, and organic amines such as monoethanolamine and diethanolamine. It can be adjusted using an agent.

  From the viewpoint that the cleaning composition of the present invention can be suitably used for continuous cleaning of rolling oil adhering to the surface of a steel plate (steel strip) or copper plate, a chelating agent, a water-soluble polymer carboxylic acid, an inorganic acid salt, and a benzotriazole It is preferable to contain at least one selected from the group consisting of derivatives.

《Chelating agent》
Examples of the chelating agent used in the present invention include aldonic acids such as gluconic acid and glucoheptonic acid, aminocarboxylic acids such as ethylenediaminetetraacetic acid, hydroxycarboxylic acids such as citric acid and malic acid, aminotrimethylene phosphonic acid, hydroxyethylidene diphosphone. Phosphonic acids such as acids, and alkali metal salts, lower amine salts, ammonium salts, alkanol ammonium salts thereof, and more preferably sodium gluconate, sodium glucoheptonate, sodium ethylenediaminetetraacetate, sodium citrate and hydroxyethylidene Sodium diphosphonate. These chelating agents may be used alone or in admixture of two or more.

  The content of the chelating agent is preferably 30 to 250 parts by weight, more preferably 50 to 200 parts by weight, with the total content of alkylglycoside, glyceryl ether and hydrocarbon being 100 parts by weight, from the viewpoint of detergency and economy. Preferably, 70 to 180 parts by weight are more preferable, and 100 to 150 parts by weight are even more preferable. On the other hand, when the cleaning composition is used for cleaning the copper plate, the content of the chelating agent is 100 parts by weight of the total content of alkylglycoside, glyceryl ether and hydrocarbon, from the viewpoint of detergency and prevention of discoloration. 0.1-3 weight part is preferable, 0.3-2 weight part is more preferable, 0.5-1.5 weight part is further more preferable, 0.7-1 weight part is further more preferable.

<Water-soluble polymer carboxylic acid>
As the water-soluble polymer carboxylic acid used in the present invention, the following general formula (2):

[Wherein R ^{3 to} R ⁸ are the same or different and each represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, an alkoxyl group having 1 to 5 carbon atoms, COOM or OH, and M represents a hydrogen atom or an alkali metal. Represents an alkylamine having 1 to 4 carbon atoms or an alkanolamine having 1 to 6 carbon atoms, m and n each represents the number of moles of the structural unit in parentheses, and m / n (molar ratio) is 0/10 to 10 / 1. ]
The compound represented by these is mentioned.

The both ends of the groups of the general formula (2) is not particularly limited, hydrogen, OH, alkyl group having 1 to 5 carbon atoms, an alkoxyl group having 1 to 5 carbon atoms, _SO 3 M (M is as defined above ) And the like, and the groups at both ends may be the same or different. m may be 0. Moreover, the weight average molecular weight (Mw) of the compound represented by the general formula (2) is preferably 1,000 to 100,000, more preferably 3,000 to 50,000, and further preferably 5,000 to 20,000. 000. The polymerization form may be block or random.

Specific examples of the water-soluble polymer carboxylic acid represented by the general formula (2), acrylic acid homopolymers, acrylic acid - maleic acid copolymer, alpha-hydroxy acrylic acid homopolymer, C ₅ olefin - maleic acid copolymer Examples thereof include polymers, isobutylene-maleic acid copolymers, and alkali metal salts or amine salts thereof. Acrylic acid homopolymer or acrylic acid-maleic acid copolymer is preferred. These water-soluble polymer carboxylic acids may be used alone or in admixture of two or more.

  From the viewpoint of water softening performance, detergency and low COD (chemical oxygen demand), the content of the water-soluble polymer carboxylic acid is 100 parts by weight of the total content of the alkyl glycoside, glyceryl ether and hydrocarbon. 0.1-10 weight part is preferable, 0.5-7 weight part is more preferable, 1-5 weight part is further more preferable, and 2-3 weight part is still more preferable. By using 0.1 parts by weight or more, when water with high hardness such as industrial water is used, a water-insoluble salt is formed with fatty acid mixed with calcium ions or magnesium ions as dirt, resulting in poor cleaning. Can be effectively suppressed.

《Inorganic acid salt》
Examples of the inorganic acid salt used in the present invention include silicates such as sodium orthosilicate, sodium metasilicate, and sodium sesquisilicate (for example, No. 1 sodium silicate, No. 2 sodium silicate, No. 3 sodium silicate), and sodium dihydrogen phosphate. , Phosphates such as disodium hydrogen phosphate, trisodium phosphate, sodium pyrophosphate, sodium tripolyphosphate, sodium hexametaphosphate, carbonates such as disodium carbonate, sodium bicarbonate, dipotassium carbonate, potassium bicarbonate, boron Examples thereof include borate salts such as sodium silicate, among which sodium orthosilicate, sodium metasilicate, and disodium carbonate are preferable. These inorganic acid salts may be used alone or in admixture of two or more.

  From the viewpoint of detergency and economy, the content of the inorganic acid salt is preferably 0.1 to 3 parts by weight, with the total content of alkylglycoside, glyceryl ether and hydrocarbon being 100 parts by weight, 2 parts by weight is more preferable, 0.5 to 1.5 parts by weight is further preferable, and 0.7 to 1 part by weight is even more preferable.

<Benzotriazole derivative>
The benzotriazole derivative used in the present invention includes a general formula (3):

[In the formula, R ⁹ is —H, —CH ₂ OH, —CH (COOH) CH ₂ COOH, —CH ₂ —CH (OH) —CH ₂ OH, —CH ₂ CH (COOH) CH ₂ COOH, —CH ₂ N (C ₂ H ₄ OH) ₂ and —CH ₂ NH—CONH _2, one selected from the group consisting of R ¹⁰ is —H or —COOH]
The compound represented by these is mentioned. Among them, from the viewpoint of further improving the solubility in the cleaning liquid and the rust preventive effect on copper, R ⁹ in the general formula (3) is —CH ₂ CH (COOH) CH ₂ COOH or —CH ₂ NH—CONH ₂ , A benzotriazole derivative in which R ¹⁰ is —H is preferred.

  Specific examples of the benzotriazole derivative represented by the general formula (3) include 1,2,3-benzotriazole, 1- (1 ′, 2′-dicarboxyethyl) benzotriazole, 1- [N, N ′. -Bis (hydroxyethyl) aminomethyl] tolyltriazole and the like.

  The content of the benzotriazole derivative is preferably 0.01 to 0.3 parts by weight, with the total content of alkylglycoside, glyceryl ether and hydrocarbon being 100 parts by weight, from the viewpoint of detergency and economy. 03-0.2 weight part is more preferable, 0.05-0.15 weight part is further more preferable, and 0.07-0.1 weight part is still more preferable.

《Glycol ether》
The detergent composition of the present invention reduces the viscosity of the cleaning liquid, suppresses foaming at the time of cleaning, and further, from the viewpoint of reducing drainage load at the time of rinsing immediately after cleaning (hereinafter referred to as preliminary rinsing) It is preferable to contain. The glycol ether used in the present invention includes ethylene glycol monoalkyl (carbon number 1 to 12) ether, diethylene glycol monoalkyl (carbon number 1 to 12) ether, triethylene glycol monoalkyl (carbon number 1 to 12) ether, benzyl And monoalkyl (carbon number 1 to 12) ether of glycol, benzyl diglycol, phenyl glycol, propylene glycol or dipropylene glycol, and monoalkyl (carbon number 1 to 12) ether of dialkyl glycol (carbon number 2 to 12). Among them, ethylene glycol monohexyl ether, ethylene glycol mono 2-ethylhexyl ether, diethylene glycol monobutyl ether, diethylene glycol monohexyl ether, diethylene glycol Cleaning monohydric ether, triethylene glycol monobutyl ether, dipropylene glycol monobutyl ether, diethylene glycol dimethyl ether and diethylene glycol dibutyl ether are preferred, and a washing method for reducing the drainage load of the rinsing liquid described in Japanese Patent No. 2539284 (hereinafter referred to as oil-water separation) (Referred to as “method”), diethylene glycol monohexyl ether, diethylene glycol mono 2-ethylhexyl ether, dipropylene glycol monobutyl ether and diethylene glycol dibutyl ether are more preferable. These glycol ethers may be used alone or in admixture of two or more.

  The content of glycol ether is 100 parts by weight of the total content of alkylglycoside, glyceryl ether and hydrocarbon, from the viewpoint of washing at a high temperature of 30 ° C. or higher and washing with oil and water, and the oil-water separation method. 1-70 weight part is preferable, 5-50 weight part is more preferable, 15-40 weight part is further more preferable, 15-36 weight part is still more preferable.

《Other ingredients》
The cleaning composition of the present invention may contain a solubilizing agent for suppressing separation of the cleaning agent, a slurrying agent for making the appearance of the cleaning agent a white suspension.

  Examples of the solubilizers used in the present invention include fatty acids and salts thereof, and alkyl sulfates and salts thereof. Specifically, alkenyl succinic acid having 6 to 18 carbon atoms, caproic acid, enanthic acid, caprylic acid, caprin. Examples include acids, lauric acid, butyric acid, valeric acid, isobutyric acid, 2-ethylhexanoic acid, and salts thereof.

  Examples of the slurrying agent used in the present invention include the water-soluble polymer carboxylic acid, naphthalene dicarboxylic acid, naphthalene disulfonic acid, phthalic acid, and alkali metal salts or amine salts thereof.

  The detergent composition of the present invention is further provided with an antifoaming agent (for example, silicone, higher alcohol, higher fatty acid and salt thereof, pluronic type copolymer) that suppresses foam generated in the washing step within a range not impairing the effects of the present invention. , Tetranic copolymer, polyethylene glycol, polypropylene glycol, etc.), other surfactants, antiseptics, rust inhibitors and the like.

"water"
The water used in the present invention is not particularly limited, and examples include ion-exchanged water and pure water. Pure water is preferable for precision parts cleaning applications, and is used for cleaning tools, metals, glass, ceramics, or plastics. Is preferably ion-exchanged water. Pure water refers to tap water that has been passed through activated carbon, subjected to ion exchange treatment, further distilled, and passed through a predetermined filter as necessary. What is necessary is just to set content of water suitably according to the usage aspect of the cleaning composition of this invention.

<< Aspect 1 >>
For example, when the cleaning composition of the present invention is diluted with an aqueous medium such as water and used for cleaning a hard surface, the water content is from the viewpoint of preventing the cleaning composition from igniting and from the economical viewpoint. In the cleaning composition, 20 to 90% by weight is preferred, 40 to 80% by weight is more preferred, 45 to 75% by weight is more preferred, and 50 to 70% by weight is even more preferred.

<< Aspect 2 >>
Alternatively, when the cleaning composition of the present invention is used for cleaning a hard surface as it is, the content of water is 50 to 99.9% by weight in the cleaning composition from the viewpoint of reducing the drainage load during use. Preferably, 80 to 99.9% by weight is more preferable, 85 to 99.8% by weight is further preferable, and 86 to 99.7% by weight is even more preferable.

<Preparation method>
The cleaning composition of the present invention having the above-described configuration can be produced by mixing the above components and other components by a conventional method. For example, the alkylglycoside, the glyceryl ether, the hydrocarbon and the glycol ether are mixed with stirring, and other components are mixed as necessary, and finally water is added to produce the mixture. it can.

<Application>
The cleaning composition of the present invention can be applied to cleaning the surface of hard parts such as precision parts, jigs, metals, glass, ceramics, and plastics. Further, the cleaning composition of the present invention can be suitably applied to the cleaning of the surface of hard members such as metals, glass, ceramics, and plastics at low temperatures, particularly continuous cleaning of steel sheets in steelworks, etc. That is, the effect can be exhibited in continuous cleaning of copper plates in steelworks, such as immersion cleaning, spray cleaning, brush cleaning, and electrolytic cleaning, that is, immersion cleaning, shower cleaning, ultrasonic cleaning, and the like. The cleaning composition of the present invention can also be applied to cleaning by an oil / water separation method that reduces the drainage load of the rinsing liquid. By applying the cleaning composition of the present invention to the cleaning as described above, effects such as shortening of the cleaning time and energy saving are exhibited. Therefore, the present invention also relates to a method for cleaning a hard surface using the cleaning composition.

《Cleaning method》
The cleaning method of the present invention includes a step of cleaning a hard surface using the cleaning composition (hereinafter sometimes simply referred to as a cleaning step), and further includes a component of the cleaning composition remaining on the hard surface. It is preferred to include a rinsing step and a drying step to wash away the solubilized soil and / or components of the cleaning composition.

  In the cleaning step, as described above, the cleaning composition of the present invention may be used as it is for cleaning a hard surface, but from the viewpoint of reducing drainage load, an aqueous medium such as water, preferably water, May be used for cleaning hard surfaces by diluting the cleaning composition of the present invention 1 to 10 times, more preferably 2 to 8 times, and further preferably 3 to 6 times. Moreover, when using the cleaning composition of this invention for steel plate washing | cleaning, it is an aqueous medium, such as water, Preferably it is water, Preferably it is 5 to 50 times, More preferably, it is 10 to 30 times, More preferably, it is 15 to 20 The cleaning composition may be diluted twice and used for cleaning the steel sheet surface.

Further, in the washing step, from the viewpoint of obtaining stable solubility and removability, it is preferable to use the detergent composition of the present invention having a pH change of 1 or less according to the following standard test, which is 0.5 or less. More preferably, a detergent composition is used. Note that the pH calibration method in the standard test is based on JIS Z8802.
<Standard test>
(1) Pure water (pH = 6-7, 1 μS / cm or less) is added to the cleaning composition to prepare a 10 wt% aqueous solution, and the pH of this aqueous solution at 25 ° C. is measured.
(2) 100 mL of the aqueous solution prepared in (1) is hermetically stored in a 1000 mL glass container at 60 ° C. for 21 days. During storage, the stopper is removed every 24 hours and the glass container is allowed to stand at 60 ° C. for 1 minute, then stoppered again, and the glass container is shaken five times.
(3) After the storage in (2), the pH of the aqueous solution after storage at 25 ° C. is measured.
(4) The absolute value of the difference between the pH measured in (1) and the pH measured in (3) is determined, and that value is taken as the pH change.

  The washing temperature in the washing step is preferably 40 ° C. or higher, more preferably 60 ° C. or higher, from the viewpoint of exhibiting sufficient solubility and removal with respect to dirt adhering to the hard surface. The washing temperature is preferably 90 ° C. or less, more preferably 80 ° C. or less, from the viewpoint of suppressing moisture evaporation.

  Although the cleaning time varies depending on the type of hard member to be cleaned and the amount and type of attached dirt, it cannot be said unconditionally, but the dirt is sufficiently removed from the hard surface in a cleaning time of 30 to 60 minutes.

  Examples of the cleaning means include various known cleaning means such as an immersion method, an ultrasonic cleaning method, an immersion rocking method, a spray method, an electrolytic cleaning method, and a hand wiping method. The hard surface can be cleaned alone or in combination.

  In the rinsing step, after the cleaning step is completed, the cleaning composition is discarded, and the soil and / or components of the cleaning composition solubilized in the cleaning composition components remaining on the hard surface are removed from the hard surface. Done to get rid of. The drying step is performed to dry the moisture remaining on the hard surface after the rinsing step is completed.

  The cleaning composition of the present invention can also be used for cleaning by an oil-water separation method that reduces the drainage load of the rinsing liquid.

  In Examples 1 to 10 and 23 to 25, and Comparative Examples 1 to 3 and 12 to 13, pure water was used as the component of the cleaning composition, and Examples 11 to 22 and 26 to 28 were used. And in Comparative Examples 4-11, all the water as a component of a cleaning composition used ion-exchange water.

<Cleanability of liquid crystal cell surface>
1. Preparation of Test Substrate A TFT (thin film transistor) liquid crystal was sealed in the gap of a liquid crystal cell (distance between gaps 5 μm), and the test substrate was allowed to stand at room temperature for 30 minutes.

2. Preparation of Cleaning Composition Each component was added and mixed so as to have the compositions shown in Table 1 and Table 2, and cleaning compositions of Examples 1 to 10 and Comparative Examples 1 to 3 were prepared.

3. Cleaning test The detergent composition prepared in 1 was heated to 40 ° C. The test substrate prepared in step 1 was placed, ultrasonically cleaned (39 kHz, 200 W) for 10 minutes, and then rinsed for 3 minutes in each of the 4 pure water tanks (40 ° C.), and then 30 minutes with a 90 ° C. hot air dryer. It dried for minutes and made it the observation sample.

[Cleanability]
The liquid crystal remaining in the gap of the observation sample and the mixture of the liquid crystal and the detergent composition that was not sufficiently discharged at the time of rinsing were observed with a polarizing microscope (25 times magnification) to evaluate the cleanability of the liquid crystal cell surface. did. For the evaluation of the cleaning property, a value obtained by dividing the total area of the observed gap by subtracting the total area of the portion where the liquid crystal and the mixture of the liquid crystal and the detergent composition remained is divided by the total area of the observed gap. Based on the value, the evaluation was made according to the following evaluation criteria. The results are shown in Tables 1 and 2.
〔Evaluation criteria〕
◎: 90% or more ○: 80 to less than 90% Δ: 40 to less than 80% ×: less than 40%

4). Repeated cleaning test In order to evaluate the repeated cleaning properties of the cleaning composition, the liquid crystal saturated dissolution concentration was examined. 2. 20 g of the cleaning composition prepared in (1) was heated to 40 ° C., 0.02 g of TFT liquid crystal was added thereto, and held at 40 ° C. for 3 minutes. Thereafter, the cleaning composition was visually confirmed, and if it was transparent, it was determined that the TFT liquid crystal was dissolved, and the same operation was repeated until the cleaning composition became cloudy. The saturated dissolution concentration was calculated from the amount obtained by subtracting 0.01 g from the amount of liquid crystal in which the cleaning liquid composition became cloudy for the first time, and defined as the liquid crystal saturation dissolution concentration.

For example, assuming that 0.24 g of TFT liquid crystal is added, the liquid crystal saturation dissolution concentration is calculated as (0.24-0.01) / (20 + 0.24-0.01) × 100. . Using such a liquid crystal saturated dissolution concentration, the washability was repeatedly evaluated based on the following evaluation criteria. The results are shown in Tables 1 and 2. In addition, the thing of (double-circle) or (circle) was set as the pass.
〔Evaluation criteria〕
◎: 2% or more ○: 1% or more to less than 2% △: 0.5% or more to less than 1% ×: less than 0.5%

5. Rinsing test (1) Evaluation of rinsing water In order to evaluate the state of rinsing water after rinsing, a 5% by weight aqueous solution of each cleaning composition is preliminarily rinsed, and a 0.5% by weight aqueous solution of each cleaning composition is used. The rinsing liquid was prepared, and the preliminary rinsing liquid and the rinsing liquid at 60 ° C. were visually observed as to whether or not they were clouded, and the rinsing water was evaluated. In addition, it was set as the pass if at least the rinse liquid was not cloudy. The results are shown in Tables 1 and 2.

(2) Rinsability evaluation <1> A 10% by weight aqueous solution (500 g) of each cleaning composition was heated to 60 ° C., and a glass panel (35 × 48 mm) having 0.2 mg of TFT liquid crystal adhered to each of them. 18 pieces were soaked for 10 minutes.
<2> Thereafter, the panel was slowly pulled up over 20 seconds and immersed in a first rinsing tank containing 500 g of pure water at 60 ° C. for 2 minutes.
<3> The panel was pulled up from the first rinsing tank in the same manner as in <2> and immersed in a second rinsing tank containing 500 g of pure water at 60 ° C. for 2 minutes.
<4> The panel is pulled up from the second rinse tank in the same manner as in <2>, immersed in an extraction tank (ultrasonic tank) containing 500 g of pure water at 70 ° C., and treated with ultrasonic waves (38 KHz, 400 W) for 10 minutes. The components of the liquid crystal and / or the cleaning composition solubilized in the cleaning composition remaining on the panel surface were extracted.
<5> Next, the organic matter concentration of the rinsing water in each rinsing tank (first and second) and the extraction water in the extraction tank is measured by TOC (total organic carbon meter), and in the first rinsing tank according to the following formula: The oil removal rate was calculated.
Formula: Oil removal rate (%) in the first rinsing tank =
(Organic weight of rinse water in the first rinse tank) / (Organic weight of rinse water in the first rinse tank + Organic weight of rinse water in the second rinse tank + Organic weight of extraction water in the extraction tank) × 100
<6> Rinseability was evaluated according to the following evaluation criteria based on the oil removal rate calculated in <5>. The results are shown in Tables 1 and 2. In addition, the thing of (double-circle) or (circle) was set as the pass.
〔Evaluation criteria〕
◎: Oil removal rate of the first rinsing tank is 90% or more ○: Oil removal rate of the first rinsing tank is 70% to less than 90% Δ: Oil removal rate of the first rinsing tank is 50% to less than 70% X: Oil removal rate of the first rinsing tank is less than 50%

  From the results of Table 1, the cleaning compositions obtained in Examples 1 to 5 and 7 to 10 are transparent because the preliminary rinsing liquid and the rinsing liquid are transparent, the rinsing performance is high, and the cleaning performance is also high. It can be seen that there is no liquid crystal or a mixture of the liquid crystal and the detergent composition in the later gap, and the liquid crystal exhibits high detergency. In Example 6, the cleaning composition is capable of oil-water separation, and the preliminary rinsing liquid becomes cloudy, but since the rinsing liquid is transparent, it was solubilized in the remaining components of the cleaning composition. It has been shown that the components of the liquid crystal and / or cleaning composition can be sufficiently rinsed.

  On the other hand, from the results of Table 2, it can be seen that the cleaning compositions obtained in Comparative Examples 1 and 2 are transparent in rinsing water, but do not contain hydrocarbons, so that the cleaning properties are low. Therefore, these cleaning compositions do not have sufficient performance as industrial cleaning liquids that are often washed repeatedly with the same cleaning liquid. Moreover, although the comparative example 3 contains a hydrocarbon and has liquid crystal washing | cleaning property, it is inferior in rinsing property, As a result, it does not have sufficient performance as an industrial cleaning liquid.

《Cleanability of steel sheet surface 1》
1. Preparation of Test Steel Sheet A steel sheet cold-rolled to a thickness of 0.5 mm and having an adhesion oil amount of 350 mg / m ² was cut into a size of 50 mm long × 25 mm wide to obtain a test steel sheet.

2. Preparation of cleaning composition (1) Preparation of cleaning composition (cleaning composition without dirt) The cleaning composition of Example 11 was prepared by adding and mixing the components so as to have the composition shown in Table 3. The sample was diluted 18 times with ion-exchanged water and subjected to characteristic evaluation.
(2) Preparation of pseudo-deteriorated cleaning agent composition Scum extracted oil obtained by extracting with hexane from scum adhering to and deposited on a rolling mill is 1.0 per 100 parts by weight of the cleaning agent composition prepared in (1). It added to the cleaning composition so that it might become a weight part, and it fully stirred and prepared the pseudo-deteriorating cleaning composition.

3. Cleaning test The cleaning composition (cleaning composition without stains) and the pseudo-deteriorating cleaning composition prepared in the above were heated to 40 ° C., and a pair of electrode plates each having a size of 100 mm in length and 50 mm in width placed therein ( The distance between the electrode plates is 20 mm), and the test steel plate is immersed for 1 second in the center at the same distance, and then the steel plate potential is switched once from negative to positive at a current density of 10 A / dm ^2. Washed. Subsequently, the sample was rinsed by water spray (water temperature 20 ° C., water pressure 0.2 MPa) at a position 10 cm from the spray head for 1 minute in a hot air dryer at 60 ° C. to obtain an observation sample.

[Cleanability]
Divide the observation sample into 5 equal parts, and the oil content measuring device “EMIA-111” (manufactured by Horiba) The average of 5 sheets was taken as the measured value. If the value was less than 45 mg / m ² , it was evaluated as a pass. The results are shown in Table 3.

4). Foaming test 2. In a 25 mL test tube. 10 mL of the stain-free cleaning composition prepared in (1) was filled, and the liquid temperature was kept at 40 ° C. Thereafter, the test tube was shaken 10 times by hand, and the initial foam height was defined as the volume of the detergent composition and the foam height immediately after standing. Moreover, after hold | maintaining the test tube at 40 degreeC for 1 minute, the volume which combined the detergent composition and foam height just after leaving still was made into the foam height after leaving still for 1 minute.

[Initial foaming and foaming properties]
If the initial foam height (initial foamability) was 16 mL or less and the foam height (foaming property) after standing for 1 minute was 11 mL or less, it was evaluated as a pass. The results are shown in Table 3.

  From the results in Table 3, it can be seen that the detergent composition obtained in Example 11 is excellent in the detergency of the steel sheet and has a low foaming property.

《Cleanability of steel sheet surface 2》
1. Preparation of test steel plate A test steel plate was prepared in the same manner as in << Sheetability of steel plate surface 1 >>.

2. Preparation of cleaning composition (1) Preparation of cleaning composition (cleaning composition without dirt) Each component was added and mixed so as to have the composition shown in Table 4, and Examples 12 to 15 and Comparative Examples 4 to 7 cleaning compositions were prepared.
(2) Preparation of pseudo-deteriorating detergent composition A pseudo-deteriorating detergent composition was prepared in the same manner as in << Degradability of steel sheet surface 1 >>.

3. Cleaning test The same test as in "Cleaning property of steel sheet surface 1" was performed.

[Cleanability]
The same evaluation as in “Cleanability 1 on steel sheet surface” was performed. The results are shown in Table 4.

4). Foaming property test The same test as in "Cleaning property of steel sheet surface 1" was performed.

[Initial foaming and foaming properties]
The same evaluation as in “Cleanability 1 on steel sheet surface” was performed. The results are shown in Table 4.

  From the results of Table 4, the detergent compositions obtained in Examples 12 to 15 are all superior in the cleanability of steel plates and have low foaming properties than those obtained in Comparative Examples 4 to 7. I understand that.

<Cleanability of copper plate surface>
1. Production of test copper plate A copper plate cold-rolled to a thickness of 1 mm and having an adhered oil content of 70 mg / m ² was cut into a size of 35 mm long × 120 mm wide to obtain a test copper plate.

2. Preparation of Cleaning Composition Each component was added and mixed so as to have the composition shown in Table 5, and cleaning compositions of Examples 16 to 22, 26 to 28 and Comparative Examples 8 to 11 were prepared. The cleaning compositions of Examples 17 to 22 and 26 to 28 were prepared by adding and mixing each component so as to have the composition shown in Table 5, and then diluted 4 times with ion-exchanged water to obtain the following composition. 3. Used for washing test.

3. Cleaning test The detergent composition prepared in 1 was heated to 50 ° C. The test copper plate produced in step 1 was immersed and subjected to ultrasonic cleaning (25 kHz, 600 W) for 30 seconds. Next, the copper plate was rocked for 2 to 3 seconds in ion-exchanged water heated to 50 ° C. Thereafter, the test copper plate was showered with tap water at 25 ° C. for 30 seconds and then immersed in a 5% by weight aqueous solution of citric acid at 25 ° C. for 10 seconds. Thereafter, the test copper plate was showered with tap water at 25 ° C. for 30 seconds, and then immersed in 25 ° C. ion exchange water for 5 seconds. Finally, water droplets remaining on the test copper plate were blown off by air blowing, and the test copper plate was dried with a hot air dryer at 90 ° C. for 10 minutes to obtain an observation sample.

[Cleanability]
The observation sample was divided into five equal parts, and the amount of oil adhering to the copper plate of each observation sample was measured using an oil content measuring device “EMIA-111” (manufactured by Horiba, Ltd.), and the average of the five samples was taken as the measured value. If the value was less than 10 mg / m ² , it was evaluated as a pass. The results are shown in Table 5.

[Occurrence of rust or oily spots]
The observation sample was visually confirmed to check for the occurrence of rust or oily spots, and evaluated according to the following evaluation criteria. The results are shown in Table 5. In addition, all items were accepted as ○ or ○.
〔Evaluation criteria〕
◎: No occurrence of rust or oily spot ○: Slightly observed the occurrence of rust or oily spot △: One point of occurrence of obvious rust or oily spot ×: Multiple occurrences of obvious rust or oily spot

  From the results shown in Table 5, the cleaning compositions obtained in Examples 16 to 22 are superior to those obtained in Comparative Examples 8 to 11 in terms of copper plate cleaning, rust prevention effect, and stain prevention. I understand. Further, from the results of Examples 26 to 28, from the viewpoint of preventing the occurrence of oily spots, the pH of the cleaning composition is preferably 4 to 12, more preferably 7 to 12, and even more preferably 9 to 12 It turns out that it is preferable.

<PH stability>
1. Preparation of Cleaning Composition Each component was added and mixed so as to have the composition shown in Table 6, and cleaning compositions of Example 23 and Comparative Examples 12 to 13 were prepared.

2. pH stability test The pH change was measured according to the standard test. The results are shown in Table 6.

  From the result of Table 6, the pH change by the standard test of the cleaning composition obtained in Example 23 is 1 or less, and the pH change by the standard test of the cleaning composition obtained in Comparative Examples 12 to 13 is 1. Thus, it is considered that the cleaning composition of the present invention can stably maintain excellent solubility and removability with respect to various types of dirt for a long period of time.

<Oil / water separation>
1. Preparation of Cleaning Composition Each component was added and mixed so as to have the composition shown in Table 8 to prepare the cleaning compositions of Examples 24 and 25, respectively. In addition, characteristic evaluations other than oil-water separability of the cleaning composition shown in Table 8 are the results of evaluation in the same manner as in the above-mentioned “cleanability of liquid crystal cell surface”.

2. Oil-water separation test For each of the cleaning composition prepared in Step 1, the cleaning composition solution diluted with ion-exchanged water so that the components other than water are 5% by weight is put in a glass bottle having a diameter of 40 mm, a height of 120 mm, and a capacity of 100 ml. The mixture was kept warm for 1 hour in an atmosphere of ° C. Thereafter, the state 1 of each cleaning composition solution is observed, and when the solution is divided into upper and lower layers, the solution is stirred for 10 seconds by moving the glass bottle up and down vigorously, and further in state 2 Was observed. The observation results were evaluated according to the evaluation criteria shown in Table 7. The results are shown in Table 8. In addition, all items were accepted as ○ or ○.
〔Evaluation criteria〕

  From the results in Table 8, it can be seen that the cleaning compositions of Examples 24 and 25 are excellent in oil / water separation properties. From this, it is thought that the cleaning composition of this invention can reduce drainage load by removing an oil component by oil-water separation.

  The cleaning composition of the present invention can be suitably used for cleaning precision parts, jigs and tools, metals, glass, ceramics, plastics, and the like.

Claims (13)

  A detergent composition for hard surfaces containing an alkyl glycoside, glyceryl ether, hydrocarbon and water.   The cleaning composition according to claim 1, wherein the hydrocarbon is a compound having 10 to 18 carbon atoms.   The cleaning composition according to claim 1, wherein the alkyl glycoside is an alkyl polyglucoside.   The ratio of each component to the total amount of alkyl glycoside, glyceryl ether and hydrocarbon is 20 to 80% by weight alkyl glycoside, 2 to 70% by weight glyceryl ether and 3 to 50% by weight hydrocarbon. The cleaning composition as described.   The detergent composition according to any one of claims 1 to 4, wherein the weight ratio of alkylglycoside / glyceryl ether is 0.28 to 40.   Furthermore, the cleaning composition in any one of Claims 1-5 containing an alkaline agent.   pH is 4-12, The cleaning composition in any one of Claims 1-6.   Furthermore, the cleaning composition in any one of Claims 1-7 containing a chelating agent and / or water-soluble polymeric carboxylic acid.   Furthermore, the cleaning composition in any one of Claims 1-8 containing an inorganic acid salt and / or a benzotriazole derivative.   Furthermore, the cleaning composition in any one of Claims 1-9 containing glycol ether.   The cleaning composition according to any one of claims 1 to 10, wherein the content of water is 20 to 90% by weight in the cleaning composition.   The pH change by a standard test is 1 or less, The cleaning composition in any one of Claims 1-11. A method for cleaning a hard surface using the cleaning composition according to claim 1.