JP5969798B2 - Cleaning composition for removing insect stains - Google Patents

Description

  The present invention relates to a cleaning composition that is excellent in removability against insect dirt attached to a hard surface of a railway vehicle or the like.

  Railcars that move at high speeds are particularly susceptible to insect fouling due to insects colliding with the top. Insect stains solidify when dried and cannot be easily removed, and it is necessary to use a cleaning agent having a high detergency. For example, it is conceivable to use an alkaline detergent having a high detergency (pH 12 or more), but aluminum vehicles have a problem of alkali corrosion and cannot be applied. On the other hand, neutral detergents have poor removability against insect stains, cannot be worked in a short time, and must be physically rubbed off. Furthermore, if the cleaning time is not sufficient due to the operation status, the cleaning operation must be terminated without completely removing insect dirt.

  Patent Document 1 discloses a car wash detergent composition having high washability. Patent Document 1 provides a cleaning composition in which high detergency is obtained and adverse effects on an aluminum vehicle body are reduced by using a specific glycol ether compound in combination with a surfactant and an alkali agent. It can be done.

JP-A-11-152497

  However, in the cleaning composition according to Patent Document 1, an alkali agent such as sodium hydroxide is added, and there is still concern about alkali corrosion for aluminum vehicles. Further, no attention has been paid to “insect stains” that are peculiar to high-speed vehicles, and there has been a demand for new cleaning compositions that can efficiently remove insect stains in a short time.

  Then, this invention makes it a subject to provide the cleaning composition which is excellent in the removability with respect to the insect dirt adhering to the hard surface.

  As a result of intensive research conducted by the present inventors in view of the above problems, a predetermined component such as polyoxyalkylene alkyl ether, an alcohol solvent, and a chelating agent are blended in a predetermined content and a predetermined ratio. Thus, it has been found that a cleaning composition showing good removability against insect dirt can be obtained. The cleaning composition has excellent removability against insect dirt even at a pH of 10 or lower, and can be applied to aluminum vehicles.

  That is, the present invention comprises at least one component (A) selected from the following components (a1), (a2) and (a3), an alcohol solvent (B) having a solubility parameter value of 15 or more, a chelating agent ( C), 100% by mass of the entire composition, 0.5% to 30% by mass of component (A), 1% to 30% by mass of alcohol solvent (B), It is a cleaning composition whose mass ratio (C / A) of the chelating agent (C) with respect to A) is 30 / 70-80 / 20.

(A1) Polyoxyalkylene alkyl ether represented by the following general formula (1) R ¹ O — [(C ₂ H ₄ O) _m / (AO) _n ] H (1)
(In the formula (1), R ¹ is a hydrocarbon group having 8 to 22 carbon atoms, AO is an alkylene oxide group having 3 to 5 carbon atoms, m is an average added mole number of ethylene oxide group, and m = 5 to 15, n is the average number of added moles of the alkylene oxide group, and n = 0 to 5. In the formula (1), C ₂ H ₄ O and AO are random or block bonds. May be.)

(A2) Polyoxyalkylene alkyl ester represented by the following general formula (2) R ² COO — [(C ₂ H ₄ O) _o / (AO) _p ] H (2)
(In the formula (2), R ² is a hydrocarbon group having 8 to 22 carbon atoms, AO is an alkylene oxide group having 3 to 5 carbon atoms, o is the average number of added moles of ethylene oxide group, and o = 5 to 15, p is the average number of added moles of the alkylene oxide group, and p = 0 to 5. In the formula (2), C ₂ H ₄ O and AO are random or block bonds. May be.)

In the present invention, (C ₂ H ₄ O) _m / (AO) _n (or (C ₂ H ₄ O) _o / (AO) _p ) refers to m 2 (or o) C ₂ H ₄ O. And n (or p) of AO are randomly bonded or block bonded.
In the present invention, the “average added mole number x to y” means that the average added mole number as a whole is in the range of x to y, even if the added mole number is less than x or more than y. If it is, it is included in the scope of the present invention. In such a case, the average number of added moles is determined based on the mass ratio of the component (X) having an added mole number less than x and the component (Y) having an added mole number exceeding y. For example, when the mass ratio is X / Y = 1, the average added mole number is 0.5 × x + 0.5 × y, and when the mass ratio is X / Y = 2/3, the average added mole number is 0. .4 × x + 0.6 × y.

(A3) Alkylamine oxide having an alkyl group having 8 to 22 carbon atoms

  In this invention, it is preferable that 0.5 to 30 mass% of chelating agents (C) are contained by making the whole composition into 100 mass%.

  In the present invention, the pH is preferably 10 or less.

  The cleaning composition according to the present invention is preferably used for removing insect stains attached to a hard surface.

  In particular, the hard surface is preferably the surface of a vehicle, and particularly preferably the surface of a vehicle using an aluminum material.

  ADVANTAGE OF THE INVENTION According to this invention, the cleaning composition excellent in the removability with respect to the insect dirt adhering to the hard surface can be provided.

  The cleaning composition according to the present invention comprises at least one component (A) selected from components (a1), (a2) and (a3), an alcohol solvent (B) having a solubility parameter value of 15 or more, A chelating agent (C), and the total composition is 100% by mass, the component (A) is 0.5% by mass to 30% by mass, and the alcohol solvent (B) is 1% by mass to 30% by mass. The mass ratio (C / A) of the chelating agent (C) to the component (A) is 30/70 to 80/20.

1. Ingredient (A)
The cleaning composition according to the present invention contains one or more components (A) selected from the components (a1), (a2) and (a3).

1.1. Ingredient (a1)
Component (a1) is a polyoxyalkylene alkyl ether represented by the following general formula (1).

^{_{R 1 O - [(C 2}} H 4 O) m / (AO) n] H (1)
(In the formula (1), R ¹ is a hydrocarbon group having 8 to 22 carbon atoms, AO is an alkylene oxide group having 3 to 5 carbon atoms, m is an average added mole number of ethylene oxide group, and m = 5 to 15, n is the average number of added moles of the alkylene oxide group, and n = 0 to 5. In the formula (1), C ₂ H ₄ O and AO are random or block bonds. May be.)

R ¹ in the above formula (1) is a hydrocarbon group. From the viewpoint of excellent removability against insect dirt, the carbon number is 8 to 22, 8 to 18 is preferable, and 10 to 15 is more preferable. As the hydrocarbon group for R ¹ , an alkyl group and an alkenyl group are preferable, and an alkyl group is particularly preferable.

  M in the above formula (1) is the average number of moles of ethylene oxide groups added. M which shows the effect outstanding with respect to insect dirt is 5-15 (mol), 6-12 are preferable and 8-12 are more preferable.

  AO in the above formula (1) is an alkylene oxide group. AO may have a methyl branched structure, an ethyl branched structure, or a propylene branched structure. AO is an alkylene oxide group having 3 to 5 carbon atoms, preferably 3 to 4, and particularly preferably a propyleneoxy group (PO) obtained by addition reaction of propylene oxide.

  In the above formula (1), n is the average number of added moles of the alkylene oxide group. N which shows the effect outstanding with respect to insect dirt is 0-5 (mol), 0-3 are preferable and 0-2 are more preferable.

  The polyoxyalkylene alkyl ether (a1) preferably has an HLB value of 8 or more and 15 or less, and more preferably 10 or more and 15 or less. The HLB value can be calculated by, for example, the Griffin method (HLB value = 20 × sum of formula weight of hydrophilic portion / molecular weight).

1.2. Ingredient (a2)
In the present invention, the following component (a2) is included instead of component (a1) or together with component (a1) because the above-mentioned component (a1) is very similar in physical properties and insect stains. Can do. Component (a2) is a polyoxyalkylene alkyl ester represented by the following general formula (2).

^{_{R 2 COO - [(C 2}} H 4 O) O / (AO) p] H (2)
(In the formula (2), R ² is a hydrocarbon group having 8 to 22 carbon atoms, AO is an alkylene oxide group having 3 to 5 carbon atoms, o is the average number of added moles of ethylene oxide group, and o = 5 to 15, p is the average number of added moles of the alkylene oxide group, and p = 0 to 5. In the formula (2), C ₂ H ₄ O and AO are random or block bonds. May be.)

R ² in the above formula (2) is a hydrocarbon group. From the viewpoint of excellent removability against insect dirt, the carbon number is 8 to 22, 8 to 18 is preferable, and 10 to 15 is more preferable. As the hydrocarbon group for R ² , an alkyl group and an alkenyl group are preferable, and an alkyl group is particularly preferable.

  In the above formula (2), o is the average number of moles of ethylene oxide groups added. “O” indicating an excellent effect on insect dirt is 5 to 15 (mol), preferably 6 to 12, and more preferably 8 to 12.

  AO in the above formula (2) is an alkylene oxide group. AO is an alkylene oxide group having 3 to 5 carbon atoms, preferably 3 to 4, and particularly preferably a propyleneoxy group (PO) obtained by addition reaction of propylene oxide. AO may have a methyl branched structure, an ethyl branched structure, or a propylene branched structure.

  In the above formula (2), p is the average number of added moles of the alkylene oxide group. P which shows the effect outstanding with respect to insect dirt is 0-5 (mol), 0-3 are preferable and 0-2 are more preferable.

  The polyoxyalkylene alkyl ester (a2) preferably has an HLB value of 8 or more and 15 or less, more preferably 10 or more and 15 or less.

1.3. Ingredient (a3)
Component (a3) is an alkylamine oxide having an alkyl group having 8 to 22 carbon atoms. As a result of intensive studies by the present inventors, it has been found that the component (a3) has an excellent removability against insect stains as well as the components (a1) and (a2). Therefore, in the present invention, the component (a3) can be included instead of the components (a1) and (a2) or together with the components (a1) and (a2).

  The alkyl group carbon number of the alkylamine oxide is from 8 to 22, preferably from 8 to 15, and more preferably from 10 to 12, from the viewpoint of showing an excellent effect on insect dirt.

  The content of the component (A) in the cleaning composition according to the present invention is 100% by mass of the entire composition, and the lower limit is 0.5% by mass or more, preferably 3% by mass or more, more preferably 5% by mass or more. The upper limit is 30% by mass or less, preferably 20% by mass or less, more preferably 15% by mass or less. If the concentration of the component (A) is too low, sufficient removability against insect dirt cannot be obtained, and if the concentration is too high, the stability of the cleaning composition is poor.

2. Alcohol solvent (B)
The detergent composition according to the present invention includes an alcohol solvent (B) having a solubility parameter value (SP value) of 15 or more.

The “dissolution parameter value” is explained as follows. That is, when the evaporation energy per mole of the liquid is ΔE _v [kJ · mol ⁻¹ ] and the molar volume is V _m [cm ³ · mol ⁻¹ ], the dissolution parameter value δ [J ^1/2 · cm ^−3/2 ] is defined by the following formula (3).

δ = (ΔE _v / V _m ) ^1/2 (3)

The solubility parameter value is used as a physicochemical constant indicating the magnitude of the intermolecular interaction in the liquid. For various compounds, based on Delta] E _v values actually measured, in addition to the solubility parameter value at room temperature are known, as disclosed in JP-A-2002-253652, ΔE _v values measured are unknown Even if it is a compound, ΔE _v is accurately calculated from the relational expression ΔE _v = 2.54 × 10 ⁻⁴ T _b ² using the standard boiling point T _b [K], and the solubility parameter value is calculated using this. Can be calculated. Alternatively, for the normal boiling point T _b is the unknown compounds, taking into account the boiling point of the measurement pressure, it is possible to identify a normal boiling point T _b by a known calculation formula.

  The alcohol solvent (B) having a solubility parameter value of 15 or more is excellent in removability against insect dirt. In the present invention, only one alcohol solvent (B) may be included, or two or more alcohol solvents (B) may be included. The alcohol solvent (B) showing particularly excellent removability against insect dirt is as follows.

  Of the aromatic alcohols, benzyl alcohol (SP value 23.7) is preferred.

  Among the polyol monoethers, 3-methoxy-3-methyl-1-butanol (SP value 20.3), 2-benzyloxyethanol (SP value 22.7), and 2-phenoxyethanol (SP value 23.4) are preferable. .

  Among polyalkylene glycols, triethylene glycol (SP value 24.5) and dipropylene glycol (SP value 22.2) are preferable.

  Among the polyethylene glycol monoethers, diethylene glycol monoethyl ether (SP value 20.6), diethylene glycol monobutyl ether (SP value 19.4), and triethylene glycol monophenyl ether (SP value 20.3) are preferable.

  Particularly preferred alcohol solvent (B) is 3-methoxy-3-methyl-1-butanol or diethylene glycol monoethyl ether.

  The content of the alcohol solvent (B) in the cleaning composition according to the present invention is 100% by mass as a whole, and the lower limit is 1% by mass or more, preferably 5% by mass or more, more preferably 10% by mass or more. The upper limit is 30% by mass or less, preferably 20% by mass or less, more preferably 18% by mass or less. If the concentration of the alcohol solvent (B) is too low, sufficient removability against insect stains cannot be obtained, and if the concentration is too high, the stability of the cleaning composition is poor.

3. Chelating agent (C)
The cleaning composition according to the present invention contains a chelating agent (C). In the present invention, only one type of chelating agent (C) may be included, or two or more types may be included.

  Examples of the chelating agent (C) include aminopolyethylene such as nitrilotriacetic acid, iminodiacetic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, glycol etherdiaminetetraacetic acid, hydroxyethyliminodiacetic acid, triethylenetetraaminehexaacetic acid, and diencoric acid. Acetic acid or salts thereof; organic acids such as diglycolic acid, oxydisuccinic acid, carboxymethyloxysuccinic acid, citric acid, lactic acid, tartaric acid, oxalic acid, malic acid, oxydisuccinic acid, gluconic acid, carboxymethylsuccinic acid, carboxymethyltartaric acid Or salts thereof; aminotri (methylenephosphonic acid), 1-hydroxyethylidene-1,1-diphosphonic acid, ethylenediaminetetra (methylenephosphonic acid), diethylenetriaminepenta (methylenephosphonic acid), alkalis thereof Genera or an amine salt; and the like can be used.

  Among these, nitrilotriacetic acid, ethylenediaminetetraacetic acid, gluconic acid, citric acid or salts thereof are more preferable because they have better removability against insect dirt, and particularly nitrilotriacetic acid, ethylenediaminetetraacetic acid, gluconic acid. Or these salts are preferable.

  In the cleaning composition according to the present invention, the chelating agent (C) is contained in a predetermined ratio with respect to the component (A). Specifically, the lower limit of the mass ratio (C / A) of the chelating agent (C) to the component (A) is 30/70 or more, preferably 40/60 or more, more preferably 50/50 or more, and the upper limit. Is 80/20 or less, preferably 70/30 or less, more preferably 60/40 or less. When it is out of the range, the concentration of the component (A) or the chelating agent (C) becomes too low, and the repellency removal property is poor.

  Moreover, it is preferable that content of the chelating agent (C) in the cleaning composition which concerns on this invention is 0.5 to 30 mass% by making the whole composition into 100 mass%. The lower limit is more preferably 2% by mass or more, particularly preferably 5% by mass or more, and the upper limit is more preferably 20% by mass or less, and particularly preferably 15% by mass or less. As described above, if the concentration of the chelating agent (C) is too low, sufficient removability against insect dirt may not be obtained, and if the concentration is too high, the stability of the cleaning composition may be inferior.

4). Other Components The cleaning composition according to the present invention includes the above component (A), alcohol solvent (B) and chelating agent (C) in a predetermined content and a predetermined ratio. It is not particularly limited. For example, all the remainder can be water. Or it is also possible to add various additives in the range which does not impair the effect of this invention. Examples of the additive include known surfactants, builders, thickeners, alcohol solvents other than the alcohol solvent (B), and the like.

  As described above, the cleaning composition according to the present invention contains a predetermined component (A) such as polyoxyalkylene alkyl ether, an alcohol solvent (B), and a chelating agent (C) with a predetermined content and a predetermined content. By mix | blending by ratio, it can be set as the cleaning composition which shows favorable removability with respect to insect dirt. That is, the cleaning composition according to the present invention is suitably used for removing insect stains adhering to a hard surface, particularly preferably used for cleaning the surface of a vehicle, and a vehicle using an aluminum material (for example, a railway) Most preferably, it is used for surface cleaning of a vehicle.

The cleaning composition according to the present invention has excellent removability against insect dirt even at a pH of 10 or less, and there is no concern about corrosion of aluminum. About pH, handling property etc. are considered, More preferably, it is 5-9, Most preferably, it is 6-8.

  Hereinafter, based on an Example, this invention is explained in full detail.

<Preparation of cleaning composition>
As shown in Tables 1 and 2, each component was blended in a predetermined amount and a predetermined ratio to obtain cleaning compositions according to Examples 1 to 12 and Comparative Examples 1 to 11, respectively. Details of each component are as follows. In addition, both of the sophanol 30 and the soffanol 200 used in Example 12 are those in which the average added mole number m of the ethylene oxide group is out of the range of 5 to 15, but by mixing both, the average added mole number m Is in the range of 5 to 15 (specifically, m = 9.8).

1) Softanol 30 (Nippon Shokubai Co., Ltd., Softanol 30, Polyoxyethylene alkyl ether, C ₁₂ -C ₁₄ secondary alcohol 100%, Average number of added moles of ethylene oxide group m = 3, HLB = 7.9)
2) Softanol 70 (Nippon Shokubai Co., Ltd. Softanol 70, polyoxyethylene alkyl ether, C ₁₂ -C ₁₄ secondary alcohol 100%, average added mole number of ethylene oxide group m = 7, HLB = 12.1)
3) Softanol 120 (Nippon Shokubai Softanol 120, polyoxyethylene alkyl ether, C ₁₂ -C ₁₄ secondary alcohol 100%, average number of moles of ethylene oxide added m = 12, HLB = 14.5)
4) SOFTANOL 200 (manufactured by Nippon Shokubai Ltd. SOFTANOL 200, polyoxyethylene alkyl _ethers, secondary 100% alcohol, the average addition mole number m = 20, HLB = 16.3 ethylene oxide groups of C 12 _{-C 14)}
5) A-1 (compound in which an average of 9 moles of ethylene oxide and an average of 2 moles of propylene oxide are added to a primary alcohol having 10 to 14 carbon atoms in order of average)
6) Sofmin L (Sophin L, lauryl dimethylamine oxide, 30%, manufactured by Toho Chemical Industry Co., Ltd.)
7) MS-400 (Ionette MS-400 manufactured by Sanyo Chemical Industries, Ltd., polyoxyethylene monostearate ester, average added mole number of ethylene oxide o = 9.1, HLB = 11.9)
8) DG (Nippon Shokubai Co., Ltd. Seafosol DG, diethylene glycol monoethyl ether, 99% or more, SP value 20.6)
9) Solfit (Kuraray Co., Ltd. Solfit, 3-methoxy-3-methyl-1-butanol, 98% or more, SP value 20.3)
10) Crewat GL (Nagase ChemteX Corp. Crewat GL, sodium gluconate, 100%)
11) Trisodium citrate (manufactured by Iwata Chemical Industry Co., Ltd. Trisodium citrate, trisodium citrate dihydrate, 99% or more)
12) MS-1000 (Sanyo Chemical Co., Ltd. Ionette MS-1000, polyoxyethylene monostearate ester, average added mole number of ethylene oxide o = 22.7, HLB = 15.7)
13) DPM (Dowanol DPM manufactured by Dow Chemical Corporation, dipropylene glycol methyl ether, 99% or more, SP value 9.4)
14) PM (Dowanol PM manufactured by Dow Chemical Co., Ltd., glycol ether (propylene glycol methyl ether), 99% or more, SP value 10.2)
15) Potassium pyrophosphate (Tahira Chemical Co., Ltd., potassium pyrophosphate, tetrapotassium diphosphate, 97% or more)
16) KOH (Asahi Glass Co., Ltd., liquid caustic potash, potassium hydroxide solution, 48% or more)

<Evaluation of cleaning composition>
About each cleaning composition, the insect stain | pollution | contamination removal property and the influence on an aluminum material were each evaluated.

1. Insect removability The red caterpillar was placed uniformly on a painted plate and allowed to stand at 50 ° C. for 24 hours. Thereafter, 10 ml of the sample was dropped on the painted plate, washed 20 times with a washability tester equipped with a brush (1125 ± 113 g), and the appearance was visually evaluated (the red caterpillar is an aquatic organism, but attached to the top of the vehicle) Since the insect stains and red worms correlate well, we used red worms to simulate the insect stains attached to the head. The evaluation results are shown in Tables 1 and 2 below. The evaluation indexes are as follows.
◎: Excellent ○: Good △: Standard ×: Inferior

2. Influence on Aluminum Material After the aluminum material (A5083P) was immersed in each cleaning composition at room temperature for 1 day, the appearance was visually evaluated. The evaluation results are shown in Tables 1 and 2 below. The evaluation indexes are as follows.
○: no gloss change ×: gloss reduction

The cleaning compositions according to Examples 1 to 12 were excellent in insect stain removability and had no adverse effect on the aluminum material.
On the other hand, in the cleaning composition according to Comparative Example 1, the amount of component (A) added was lower than the range of the present invention, and sufficient removability against insect dirt was not obtained.
In the cleaning composition according to Comparative Example 2, the amount of the alcohol solvent (B) added was below the range of the present invention, and sufficient removability against insect stains was not obtained.
In the cleaning compositions according to Comparative Examples 3 and 6, the average added mole number m of the ethylene oxide group of the component (A) was out of the scope of the present invention, and sufficient removability against insect dirt could not be obtained. .
In the cleaning composition according to Comparative Example 4, the SP value of the alcohol solvent (B) was out of the scope of the present invention, and sufficient removability against insect stains was not obtained.
The cleaning compositions according to Comparative Examples 5 and 7 have a compounding ratio C / A between the component (A) and the chelating agent (C) that is out of the scope of the present invention, and has sufficient removability against insect stains. It was not obtained.
As a result of using the potassium hydroxide as an alkaline agent, the cleaning composition according to Comparative Example 8 had a pH of the composition exceeding 10, and the aluminum was corroded and discolored.
In the cleaning composition according to Comparative Example 9, the amount of alkylamine oxide added was outside the scope of the present invention, and sufficient removability against insect stains was not obtained.
In the cleaning composition according to Comparative Example 10, the number of added moles of ethylene oxide of the polyoxyethylene alkyl ester deviated from the scope of the present invention, and sufficient removability against insect stains was not obtained.
In the cleaning composition according to Comparative Example 11, aluminum was discolored by potassium pyrophosphate, and sufficient removability was not obtained with respect to insect removability.

  Although the present invention has been described with reference to the most practical and preferred embodiments at the present time, the invention is not limited to the embodiments disclosed herein. However, the present invention can be appropriately changed without departing from the gist or concept of the invention that can be read from the claims and the entire specification, and a cleaning composition with such a change is also included in the technical scope of the present invention. Must be understood.

  The cleaning composition according to the present invention can clean insect stains adhering to a hard surface in a short time. In particular, it can be suitably used as a cleaning agent for railway vehicles.

Claims (4)

Including one or more components (A) selected from the following components (a1), (a2) and (a3), an alcohol solvent (B) having a solubility parameter value of 15 or more, and a chelating agent (C),
100% by mass of the entire composition, 0.5% by mass to 30% by mass of the component (A), 1% by mass to 30% by mass of the alcohol solvent (B),
The mass ratio (C / A) of the chelating agent (C) to the component (A) is 30/70 to 80/20.
A cleaning composition used for removing insect stains adhering to a hard surface .
(A1) Polyoxyalkylene alkyl ether represented by the following general formula (1) R ¹ O — [(C ₂ H ₄ O) _m / (AO) _n ] H (1)
(In the formula (1), R ¹ is a hydrocarbon group having 8 to 22 carbon atoms, AO is an alkylene oxide group having 3 to 5 carbon atoms, m is an average added mole number of ethylene oxide group, and m = 5 to 15, n is the average number of added moles of the alkylene oxide group, and n = 0 to 5. In the formula (1), C ₂ H ₄ O and AO are random or block bonds. May be.)
(A2) Polyoxyalkylene alkyl ester represented by the following general formula (2) R ² COO — [(C ₂ H ₄ O) _o / (AO) _p ] H (2)
(In the formula (2), R ² is a hydrocarbon group having 8 to 22 carbon atoms, AO is an alkylene oxide group having 3 to 5 carbon atoms, o is the average number of added moles of ethylene oxide group, and o = 5 to 15, p is the average number of added moles of the alkylene oxide group, and p = 0 to 5. In the formula (2), C ₂ H ₄ O and AO are random or block bonds. May be.)
(A3) Alkylamine oxide having an alkyl group having 8 to 22 carbon atoms The cleaning composition of Claim 1 which contains the said chelating agent (C) 0.5 to 30 mass% by making the whole composition into 100 mass%. The cleaning composition according to claim 1 or 2, wherein the pH is 10 or less. The cleaning composition in any one of Claims 1-3 whose said hard surface is the surface of a vehicle.