JPH10287896A - Detergent for magnetic card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject detergent capable of releasing a coated film on the surface of a magnetic card, developing excellent detergent properties and improving a working environment, by using a quaternary ammonium hydroxide as an alkali component. SOLUTION: This detergent comprises a quaternary ammonium hydroxide such as a compound of the formula [R<1> to R<4> are each a 1-6C alkyl, alkenyl, phenyl, benzyl or a group of the formula (Cn H2n O)1 H ((m) is 1-5; (n) is 2-4)] as an essential component and (B) a compound of the formula R<5> O(Cn H2n O)m R<6> (R<5> is a 1-8C alkyl or alkenyl; R<6> is H or R5 ; (m) is 1-4; (n) is 2 or 3). Preferably the detergent comprises 0.1-10 wt.% of the component A and 0-80 wt.% of the component B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning agent for removing and cleaning a coating applied and printed on the surface of a magnetic card for collecting and reproducing the magnetic card. More specifically, the present invention relates to a cleaning agent which exhibits an excellent cleaning effect by adding an alkali component.

[0002]

2. Description of the Related Art Magnetic cards typified by prepaid cards such as telephones are widely used, and there is a demand for collection and recycling after use. For this reason, it is necessary to completely remove the coating on the surface of the magnetic card in order to collect and recycle it. Conventionally, cleaning agents used for this purpose include ketones such as methyl ethyl ketone, halogenated hydrocarbons such as methylene chloride, and solvents such as tetrahydrofuran, dimethylformamide and dimethyl sulfoxide, alone or in combination. (JP-A-64-24799). In addition, there is a case where an aromatic hydrocarbon such as xylene is used as a general solvent, and a case where an inorganic alkali agent such as sodium hydroxide is added to glycol ether.

[0003]

However, with these solvents, the effect of removing or cleaning the coating film on the surface of the magnetic card is not sufficient, and it is necessary to take measures against odor and to pay attention to the concentration in the environment. Problems have also been pointed out from the environmental point of view. Further, in the case of adding an inorganic alkali agent to glycol ether, there is a problem that the detergent itself undergoes phase separation and the inorganic alkali agent is precipitated, and the cleaning effect is not sufficient. SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic card cleaning agent which exfoliates a coating film on the surface of a magnetic card, has excellent cleaning properties, and is satisfactory in terms of working environment.

[0004]

Means for Solving the Problems The present inventors have made intensive studies to achieve the above object, and as a result, the use of quaternary ammonium hydroxide as an alkali component in a cleaning agent meets this object. And completed the present invention. That is, the present invention is a magnetic card detergent containing quaternary ammonium hydroxide.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, examples of the alkyl group having 1 to 6 carbon atoms of R ^{1 to} R ^{4 in} the general formula (1) of (A) include a methyl group, an ethyl group, a propyl group and a butyl group. Group, isopropyl group and tert-butyl group, hexyl group,
Examples of the (C _n H _2n O) _m H group include an oxyethylene group, an oxypropylene group, and an oxybutylene group. Preferred among R ^{1 to} R ⁴ are an alkyl group having 1 to 4 carbon atoms, a benzyl group, an oxyethylene group,
An oxypropylene group is particularly preferable, and an alkyl group having 1 to 2 carbon atoms, a benzyl group and an oxyethylene group are particularly preferable.

Specific examples of (A) include tetramethylammonium hydroxide, tetraethylammonium hydroxide,
Tetrapropylammonium hydroxide, tetrabutylammonium hydroxide, trimethylethylammonium hydroxide, trimethylpropylammonium hydroxide, trimethylbutylammonium hydroxide, trimethylpentylammonium hydroxide, trimethylhexylammonium hydroxide, dimethyldiethylammonium hydroxide, hydroxide Methyl triethyl ammonium, trimethyl benzyl ammonium hydroxide, triethyl benzyl ammonium hydroxide, methyl tribenzyl ammonium hydroxide, methyl diethyl benzyl ammonium hydroxide, trimethyl (2-hydroxyethyl) ammonium, triethyl (2-hydroxyethyl) hydroxide Ammonium, trimethyl (3-hydroxypropyl) ammonium hydroxide, triethyl hydroxide (3- Mud hydroxypropyl) ammonium, hydroxide dimethyldi (2-hydroxyethyl) ammonium, hydroxide dimethyldi (3-hydroxypropyl)
Ammonium and mixtures thereof.

The cleaning agent of the present invention contains quaternary ammonium hydroxide as an essential component, but when the compound (B) represented by the following general formula (2) is used in combination, the cleaning effect is increased. preferable. ^{_{R 5 O (C n H 2n}} O) m R 6 (2) ( wherein, R ⁵ is an alkyl group having 1 to 8 carbon atoms, R ⁶ is hydrogen or an alkyl group having 1 to 8 carbon atoms, n represents 2 An integer of 3, m
Represents an integer of 1 to 4. )

Examples of the alkyl group having 1 to 8 carbon atoms for R ^{5 in} the general formula (2) of the compound (B) include methyl, ethyl, propyl, butyl, isopropyl and te
Examples thereof include an rt-butyl group, a hexyl group, and an octyl group. Among them, preferred from the viewpoint of the washing effect are a methyl group, an ethyl group, a propyl group, an isopropyl group and a butyl group. When the number of carbon atoms in the alkyl group exceeds 8, the cleaning property deteriorates. Examples of the alkyl group having 1 to 8 carbon atoms for R ⁶ include a methyl group, an ethyl group, a propyl group, a butyl group,
Examples include an isopropyl group and a tert-butyl group, a hexyl group, and an octyl group. Among R ⁶ , preferred are hydrogen and an alkyl group having 1 to 4 carbon atoms. In particular, hydrogen, a methyl group, and an ethyl group are preferable because they exhibit excellent cleaning effects. When the number of carbon atoms in the alkyl group exceeds 8, the cleaning property deteriorates. C _n H _2n O in the formula represents an oxyethylene group and / or an oxypropylene group. From the viewpoint of the cleaning effect, it is preferable that at least an oxyethylene group is contained. m represents the number of moles of ethylene oxide and / or propylene oxide added, and is usually an integer of 1 to 4, preferably 2 to 3. When m is greater than 2, the form of addition of ethylene oxide and / or propylene oxide may be alone, or may be a random or block addition thereof. When m is more than 4, the cleaning property is deteriorated.

Specific examples of (B) include alkylene glycol monoalkyl ethers (diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, triethylene glycol monomethyl ether, Triethylene glycol monopropyl ether, triethylene glycol monobutyl ether, ethylene propylene glycol monomethyl ether, ethylene propylene glycol monoethyl ether, ethylene propylene glycol monopropyl ether, ethylene propylene glycol monobutyl ether, diethylene propylene glycol monomethyl ether, diethylene Propylene glycol monoethyl ether, diethylene propylene glycol monopropyl ether, diethylene propylene glycol monobutyl ether, triethylene propylene glycol monomethyl ether, triethylene propylene glycol monopropyl ether, triethylene propylene glycol monobutyl ether, tetraethylene propylene glycol monoethyl ether, ethylene Dipropylene glycol monomethyl ether, ethylene dipropylene glycol monoethyl ether, ethylene dipropylene glycol monopropyl ether, ethylene dipropylene glycol monobutyl ether, ethylene propylene glycol monotert-butyl ether, dipropylene glycol monomethyl ether, dipropylene Glycol monoethyl ether, dipropylene glycol monobutyl ether, etc.), alkylene glycol dialkyl ethers (diethylene glycol dimethyl ether, diethylene glycol diethyl ether, triethylene glycol dimethyl ether, triethylene glycol diethyl ether, diethylene glycol methyl ethyl ether, etc.) and mixtures thereof. Can be

The amount of the quaternary ammonium hydroxide (A) in the detergent of the present invention is usually 0.1 to 10%, preferably 1 to 5% on a weight basis in terms of detergency and handleability. It is. The amount of the compound (B) represented by the general formula (2) is usually 0 to 80%, preferably 10 to 60% by weight.

The detergent composition of the present invention contains, in addition to the above-mentioned quaternary ammonium hydroxide as an alkali component, an organic alkali such as an alkanolamine, sodium hydroxide,
Inorganic alkalis such as potassium hydroxide, sodium carbonate and potassium carbonate can be added. Further, in order to impart permeability and wettability, for example, nonionic surfactants such as ethylene oxide adduct of nonylphenol, ethylene oxide adduct of octylphenol, ethylene oxide adduct of fatty acid, and perfluoroalkyl ethylene oxide adduct, sodium alkyl sulfate, and alkylbenzene Anionic surfactants such as sodium sulfonate, alkyl phosphates and higher fatty acid salts, cationic surfactants such as benzalkonium chloride, and amphoteric surfactants such as alkyl betaine can be added.

For cleaning a magnetic card using the cleaning agent of the present invention, the temperature is from room temperature to 100 ° C., preferably 30 to 70 ° C.
A washing machine with a brush roll immersed in the cleaning agent of the present invention,
After washing with an ultrasonic washing machine or the like, rinsing with water or warm water, and then drying.

[0013]

EXAMPLES The present invention will be described in detail with reference to the following Examples, but it should not be construed that the present invention is limited thereto. In the examples,% indicates% by weight unless otherwise specified. Examples 1 to 13 and Comparative Examples 1 to 4 <Washability test> Magnetic card 1000
The sheets were placed, and washed with an ultrasonic cleaner at 50 ° C. for 60 minutes while rotating and rocking. Then, after rinsing with tap water and drying, the presence or absence of a coating film on the surface of the magnetic card was visually checked. Evaluation criteria A: Out of 1,000 magnetic cards, no more than 20 magnetic cards had a coating film remaining. ：: Out of 1,000 magnetic cards, 20 to 50 magnetic cards with the coating film remaining. B: Out of 1,000 magnetic cards, 50 to 200 magnetic cards with the coating film remaining. ×: Out of 1,000 magnetic cards, 200 or more magnetic cards with the remaining coating film were found. <Comparison of Stability> The cleaning agents shown in Examples and Comparative Examples
It was left at 0 ° C., and after 30 minutes, the appearance was visually observed and compared. ：: good stability without change in appearance ×: poor stability with phase separation or sediment.

[0014]

[Table 1]

[0015]

The cleaning agent of the present invention contains quaternary ammonium hydroxide and effectively removes and cleans the coating on the surface of the magnetic card. It is a very useful cleaning agent for magnetic cards that does not cause phase separation and the like found in cleaning agents to which an inorganic alkali agent has been added, and has no problem in odor or working environment.

Claims (3)

[Claims] 1. A magnetic card detergent comprising a quaternary ammonium hydroxide. 2. The cleaning agent according to claim 1, wherein the quaternary ammonium hydroxide is a compound (A) represented by the following general formula (1). General formula: (Wherein, R ¹ , R ² , R ³ and R ⁴ represent an alkyl group having 1 to 6 carbon atoms, an alkenyl group, a phenyl group, a benzyl group,
And a (C _n H _2n O) _m H group (where n is an integer of 2 to 4,
m is an integer of 1 to 5). ) 3. The cleaning agent according to claim 1, further comprising a compound (B) represented by the general formula (2). General _{^{formula: R 5 O (C n H}} 2n O) m R 6 (2) ( wherein, R ⁵ is an alkyl group having 1 to 8 carbon atoms, an alkenyl group, R ⁶ is hydrogen or alkyl of 1 to 8 carbon atoms Group, alkenyl group, n represents an integer of 2 to 3, and m represents an integer of 1 to 4.)