JPS5944359B2 - Cleaning solvent composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cleaning solvent composition, the purpose of which is to remove various stains, such as stains mainly composed of tobacco resin containing various phenols, nicotine, etc. It is an object of the present invention to provide a cleaning solvent composition which has high cleaning power and long cleaning durability.

Dirt on the electrode plates and ventilation fans of air purifiers installed in offices, conference rooms, etc. is more difficult to remove than ordinary dirt. Such stains are mainly caused by cigarette smoke. If such dirt is firmly attached and gradually oxidized over a long period of time, it is difficult to remove it with ordinary cleaning solvents such as polyethylene glycol. For this purpose, it is physically wiped off with a special detergent aqueous solution consisting of water, hydrogen peroxide, alcohol, alkali silicate, surfactant and anticorrosion agent as described in Japanese Patent Publication No. 48-42936. method is being carried out. However, this method of physically wiping is laborious and time consuming, and the above-mentioned drawbacks are especially noticeable in cases where dozens of electrode plates need to be cleaned at once, such as in air purifiers. I'm coming. As a result of continuing intensive research in order to solve the above-mentioned difficulties, the present inventor has discovered that halogenated hydrocarbon solvents of 40 to 95
Weight% and aliphatic polyhydric alcohol having 2 to 6 carbon atoms 5 to 6
A cleaning solvent composition containing an aliphatic monohydric alcohol having 1 to 6 carbon atoms to 0% by weight so that the resulting mixed solvent forms a uniform layer has an extremely strong cleaning power. It was discovered that even tough stains mainly composed of resin can be almost completely removed by immersion in the solvent for just a few minutes.
The invention related to No. 00 (Japanese Patent Application No. 51-132201) was completed.

The present inventor has conducted further research based on the above invention, and has discovered a cleaning solvent composition that has greater cleaning power and further improved sustainability of the cleaning effect, and has completed the present invention.

That is, the present invention provides (a) 40 to 85% by weight of a halogenated hydrocarbon solvent (hereinafter referred to as "component a"), (b) the following general formula [1], [] and [] or alkenyl group, carbon number 7-26 alkylphenyl group or C2-20 acyl group, R2 is C1
~20 alkyl groups or hydroxyalkyl groups, R3
represents a hydrogen atom or a methyl group, l is an integer of 2 to 20, m and n are each 0 or an integer of 1 to 20, and 1≦m+n≦
A range of 20 is shown.

] (hereinafter referred to as "component b")
(c) at least one selected from monohydric alcohols having 1 to 6 carbon atoms, ethylene glycol monoalkyl ethers having 3 to 6 carbon atoms, and ketones having 3 to 7 carbon atoms (hereinafter referred to as This relates to a cleaning solvent composition containing 10 to 40% by weight (referred to as "component c") as a main component.

In the composition of the present invention, the above components a, b and c
It is essential that the ingredients be contained in a predetermined ratio.

If the above-mentioned predetermined ratio is exceeded or if any component is missing, the excellent effects of the present invention will not be exhibited. The component a used in the present invention, that is, the halogenated hydrocarbon solvent, is a hydrocarbon substituted with at least one chlorine atom, fluorine atom, or bromine atom, and has 1 to 4 carbon atoms.

Such halogenated hydrocarbons include, for example, methylene chloride, chloroform, 1,1-dichloroethane, 1
・2-dichloroethane, 1,1,1-trichloroethane, trichlorethylene, perchloroethylene, trichloromonofluoromethane, tetracucarodifluoroethane, trichlorotrifluoroethane, dibromotetrafluoroethane, 1,3 dibromotetrafluoroethane, 1
・3-dichloropropane, 2,2-dichloropropane,
Examples include 1,3-dichlorobutane and 1,4-dichlorobutane, which may be used alone or in combination of two or more. The amount of halogenated hydrocarbon solvent used is 40 to 85
% by weight, more preferably in the range of 50-85% by weight. If it is out of the range of 40 to 85% by weight, component b,
The detergency is poor regardless of the proportion of component c used.

In component b, the general formula N3 [wherein, R3 is a hydrogen atom or a methyl group, and l is 2 to 20]
[representing an integer] includes polyethylene glycol-polypropylene glycol.

In the compound of general formula [1], if 1 is less than 2, the detergency of the composition is good, but if dirt components accumulate in the composition due to repeated washing, the detergency may not last long. Produces a tendency to be inferior in sex. Moreover, when 1 is 21 or more, there is a tendency for the detergency to decrease. In order to further increase the effect, it is preferable to use a compound of the general formula [] where l is an integer of 5 to 20. Also, when an aliphatic polyhydric alcohol having 2 to 6 carbon atoms is used instead of the compound of general formula [1], the cleaning power is equivalent to that of the compound of general formula [1]. However, it has poor cleaning power sustainability. General formula [wherein R1 represents an alkyl group or alkenyl group having 1 to 20 carbon atoms, an alkylphenyl group having 7 to 26 carbon atoms, or an acyl group having 2 to 20 carbon atoms, and R3 and l are the same as above] Typical examples of the compounds represented are polyoxyethylene octyl ether, polyoxyethylene lauryl ether, polyoxyethylene oleyl ether, polyoxyethylene nonyl phenyl ether, polyoxyethylene octyl phenyl ether, and polyoxyethylene monolauryl ether. Examples include polyoxyethylene monostearate and polyoxyethylene monostearate.

In the general formula [], when 1 is less than 2, the detergency of the composition obtained is reduced, and when 1 is 21 or more, the detergency of the composition obtained is reduced. Therefore, l is 2~
Preferably, a range of 20 compounds is used. In order to enhance the effect even more, it is preferable to use a compound in which l is in the range of 5 to 20. General formula [wherein R2 is an alkyl group or hydroxyalkyl group having 1 to 20 carbon atoms, m and n are O
or an integer from 1 to 20 and 1≦m+n≦20, and R3 is the same as above] Typical examples of compounds represented by the formula include methyldiethanolaminetriethanolamine, polyoxyethylenehexylamine, and Examples include oxyethylene laurylamine and polyoxyethylene tallow amine.

In the general formula [], (m+n) exceeds 20,
Poor cleaning power. When a compound in which (m+n) is O, that is, R2NH2 is used, there are disadvantages such as poor cleaning power and corrosivity to metals such as aluminum. If you want to further increase the effect, 1≦m+n〈
Preferably, a range of 10 compounds is used. The above component b can be used alone or in a mixture of two or more.

In this case, the above-mentioned effects of the present invention are fully exhibited by using the compound of the general formula [], but the above-mentioned effects become more pronounced when the compound of the general formula [] or [] is used. The amount of these compounds used is 5 to 20% by weight, preferably 1
It is 0 to 20% by weight. If it is outside this range, the detergency and detergency durability will be poor. c used in the present invention
Ingredients: Monohydric alcohol with 1 to 6 carbon atoms, 3 to 6 carbon atoms
at least one selected from ethylene glycol monoalkyl ether and ketones having 3 to 7 carbon atoms.

Examples of monohydric alcohols having 1 to 6 carbon atoms include methanol, ethanol, n-propanol, IsO propanol, n-butanol, IsO-butanol, sec-butanol, tertiary-butanol, 1-pentanol, 3-pentanol, Examples include 1-hexanol, 3-hexanol, and cyclohexanol. Examples of the ethylene glycol monoalkyl ether having 3 to 6 carbon atoms include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, and ethylene glycol monobutyl ether. As a ketone having 3 to 7 carbon atoms,
Examples include acetone, methyl ethyl ketone, diethyl ketone, and dipropyl ketone. One type or two or more types of each of the above c components are used. The amount of component e used is
It is 10 to 40% by weight, preferably 30% by weight or less.
If the amount is outside the range of 10 to 40%, the detergency and its sustainability will be reduced.

Since the components a, b, and c of the present invention dissolve in each other and do not form a nonuniform layer, the method for producing the cleaning solvent composition of the present invention is not important; Component c may be mixed in any order.

Other solvents, surfactants, etc. can be added to the solvent composition of the present invention, if necessary.

Other solvents include nonpolar solvents such as benzene, toluene, xylene, pentane, hexane, nitromethane,
Polar solvents such as dimethylformamide and tetrahydrofuran are used. In addition, the surfactant is appropriately selected from cationic surfactants, anionic surfactants, nonionic surfactants, etc. that are generally used for detergents, and among them, ionic surfactants are used. is preferred.
Examples of these ionic surfactants include metal or amine salts of alkylbenzene sulfonic acids, alkyl sulfuric acids, and N-alkyloyl sarcosines, trialkyl quaternary surfactants,
Examples include class ammonium compounds, alkyl betaines, alkylimidazolines, and the like. When cleaning with the cleaning solvent composition of the present invention, any method may be used, such as a method in which the object to be cleaned is immersed in the cleaning solvent composition of the present invention, or a method in which the stain is washed away by spraying it as an aerosol type. ~ As mentioned above, the cleaning solvent composition of the present invention not only has a powerful and long-lasting effect on stains mainly composed of tobacco tar, but also can clean them very easily, and can also be cleaned easily with other general cleaning agents. Hardly adhered oily or tar-like dirt that is difficult to remove, such as oily dirt on kitchen or kitchen ventilation fans, oily or tar-like dirt on tunnel walls, road signs, toll booths, etc. caused by automobile exhaust gas, etc. It is also highly effective for cleaning.

Example 1 An electrostatic precipitator electrode plate that had been used for a considerable period of time and whose entire surface had turned blackish brown due to dirt mainly composed of cigarette smoke was cut into a size of 50 mm x 50 mm. Used as items to be washed.

200 cc of each of solvent compositions 4 to 5 shown in Table 1 below were placed in a beaker and gently stirred on a magnetic stirrer.

The article to be washed, whose weight had been measured in advance, was suspended from a wire and immersed in this stirring bath. At the same time, a stopwatch was started, and after exactly 2 minutes, the object to be washed was taken out and gently immersed in methanol to remove the non-volatile solvent.
It was then dried in a dryer and its weight was measured. The stain removal rate was calculated using the following formula. However, WO is the weight of the item to be washed before washing, W is the weight of the item to be washed after washing, and w is the weight of the item to be washed after washing. The weight of the washed items measured later is shown.

The results are shown in Table 1.

Example 2 200CC of each of solvent compositions 4 to 5 shown in Table 1 above
The mixture was poured into a beaker and gently stirred over a magnetic stirrer.

Electrostatic precipitator electrode plates (size: 50 mm x 50 mm) of the same type as those used in Example 1 were placed in this cleaning solution for 2 minutes each to wash a total of 50 plates. Thereafter, one electrode plate, whose weight had been measured in advance, was placed in the above-mentioned cleaning solution and washed, and the stain removal rate was measured in the same manner as in Example 1.

The results are shown in Table 1. Comparative Example 1 Only one component among the components of the solvent composition 4 of the present invention used in Example 1 was removed, and (a) component a-b component, (b) component a-c component, and (c) component b-c. The components were combined to obtain a composition.

Claims (1)

[Scope of Claims] 1(a) 40 to 85% by weight of halogenated hydrocarbon solvent, (
b) The following general formulas [I], [II] and [III]▲There are mathematical formulas, chemical formulas, tables, etc.▼[I]▲There are mathematical formulas, chemical formulas, tables, etc.▼[II]▲There are mathematical formulas, chemical formulas, tables, etc. There is▼
[III] [In the formula, R^1 is an alkyl group or alkenyl group having 1 to 20 carbon atoms, an alkylphenyl group having 7 to 26 carbon atoms, or an acyl group having 2 to 20 carbon atoms, and R^2 is an acyl group having 1 to 20 carbon atoms. ~20 alkyl groups or hydroxyalkyl groups,
R^3 is a hydrogen atom or a methyl group, 1 is an integer of 2 to 20, m and n are each 0 or an integer of 1 to 20, and 1≦m
+n≦20. ] and (c) a monohydric alcohol having 1 to 6 carbon atoms, and (c) a monohydric alcohol having 3 to 6 carbon atoms.
A cleaning solvent composition comprising 10 to 40% by weight of at least one selected from ethylene glycol monoalkyl ether and ketone having 3 to 7 carbon atoms as a main component. 2. The cleaning solvent composition according to claim 1, wherein in the general formulas [I] and [II], 1 is an integer of 5 to 20. 3 In general formula [III], m and n are 0 or 1 to 10
The cleaning solvent composition according to claim 1, which is an integer in the range of 1≦m+n≦10.