JP2912038B2 - Cleaning agent for insulated cable - Google Patents

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 an insulated cable, and more particularly to a jelly (silicone oil, liquid polybutene) previously filled in a cable for connecting an insulated cable for communication or power. Etc.), and a cleaning agent used for easily and safely cleaning and removing conductive substances such as oil stains, metal powder, and carbon powder that adhere during connection work.

[0002]

2. Description of the Related Art When connecting an insulated cable, it is necessary to remove jelly filled in the insulated cable and various conductive substances adhered during connection work. For this removal, various cleaning agents are generally used. The most common of these detergents is gasoline. However, the detergency of gasoline is insufficient for jelly, and the jelly adhering to the surface of the crosslinked polyethylene coating in the cable cannot be sufficiently removed,
There is a problem that the connection work is greatly hindered. Furthermore, the connection work of the insulated cable mainly consists of manholes,
Actually, the cleaning is performed in a small space such as a cave or a handhole and in a poorly ventilated place. Therefore, it is preferable that the cleaning agent used has no odor or toxicity, but gasoline is used. It has a strong odor and a low flash point, which poses a problem in fire prevention measures.

For example, fluorocarbon solvents such as Freon R-11 and Freon R-113 are known as detergents in place of gasoline. These solvents have the advantage of being less toxic and non-flammable,
On the other hand, they have the disadvantage that they have poorer detergency than gasoline and also cause so-called ozone depletion.

Also, 1,1,1-trichloroethane,
Chlorohydrocarbon solvents such as 1,2,3-trichloropropane, 1,1,2,2-tetrachloroethane, trichloroethylene and perchlorethylene are also known.
These solvents have good detergency and are nonflammable, but have problems with odor and toxicity.

Aromatic hydrocarbon solvents such as benzene, toluene and xylene; acetone, methyl ethyl ketone,
Ketone solvents such as methyl isobutyl ketone, cyclohexanone and methylcyclohexaine; ethyl ether, isopropyl ether, n-butyl ether, n-
Ether solvents such as hexyl ether and 1,4-dioxane are also known, but these are generally all
Unsuitable for toxicity, odor, flash point, etc.

Also, methyl formate, ethyl formate, propyl formate, butyl formate, methyl acetate, ethyl acetate, propyl acetate, butyl acetate, amyl acetate, ethyl butyrate, butyl butyrate, amyl butyrate, ethyl lactate, butyl lactate, amyl lactate, Ester solvents such as diethyl carbonate are also known, but these have problems in odor.

[0007]

The above-mentioned known cleaning agents, when used as a cleaning agent for connecting an insulated cable, are required in all aspects of detergency, odor, toxicity and flammability. The performance cannot be sufficiently satisfied. The present invention provides a cleaning agent for an insulated cable which solves the above-mentioned problems, has excellent detergency against jelly, has low odor and toxicity, has a relatively high flash point, and sufficiently satisfies the required performance in practical use. Aim.

[0008]

To achieve the above object, the present invention provides the following formula:

[0009]

Embedded image

(Wherein R ¹ and R ² are the same but different
Even if well, respectively, represent hydrogen or an alkyl group having 1 to 5 carbon atoms, m is at least one glycol ether compounds represented by represents 2 or 3), and the monoolefin 10-13 carbon atoms A cleaning agent for an insulated cable, characterized by comprising the mixture as an essential component.

The cleaning agent of the present invention contains, as an essential component, a mixture of the glycol ether compound represented by the formula (1) and a monoolefin described below. As a glycol ether compound as one component of this mixture , when m = 2, diethylene glycol monomethyl ether (R ¹ : H,
R ² : CH ₃ ) , diethylene glycol dimethyl ether (R ¹ , R ² : CH ₃ ) , diethylene glycol monoethyl ether (R ¹ : H, R ² : C ₂ H ₅ ) , diethylene glycol diethyl ether (R ¹ , R ² : C ₂ H ₅ ) , diethylene glycol methyl ethyl ether (R ¹ , R ² : CH ₃ or C ₂ H ₅ ) , diethylene glycol monopropyl ether (R ¹ : H, R ² : C ₃ H ₇ ) , diethylene glycol dipropyl ether (R ¹ , R ² : C ₃ H ₇ ) , diethylene glycol methyl propyl ether (R ¹ , R ² : CH ₃ or C ₃
H ₇ ) , diethylene glycol ethyl propyl ether (R ¹ , R ² : C ₂ H ₅ or C ₃ H ₇ ) , diethylene glycol monobutyl ether (R ¹ : H, R ² : C ₄ H ₉ ) , diethylene glycol dibutyl ether (R ¹ , R ² : C
₄ H ₉ ) , diethylene glycol methyl butyl ether (R ¹ , R ² : CH ₃ or C ₄ H ₉ ) , diethylene glycol ethyl butyl ether (R ¹ , R ² : C ₂ H ₅ or C ₄
H ₉ ) , diethylene glycol propyl butyl ether (R ¹ , R ² : C ₃ H ₇ or C ₄ H ₉ ) , diethylene glycol monopentyl ether (R ¹ : H, R ² : C ₅ H ₁₁ ) , diethylene glycol dipentyl ether (R ¹ , R ² : C
₅ H ₁₁ ) , diethylene glycol methyl pentyl ether (R ¹ , R ² : CH ₃ or C ₅ H ₁₁ ) , diethylene glycol ethyl pentyl ether (R ¹ , R ² : C ₂ H ₅ or C
₅ H ₁₁ ) , diethylene glycol propyl pentyl ether (R ¹ , R ² : C ₃ H ₇ or C ₅ H ₁₁ ) , diethylene glycol butyl pentyl ether (R ¹ , R ² : C ₄ H ₉ or C ₅ H ₁₁ ) . I can give it.

[0012] In the case of m = 3, the group of triethylene glycol ether corresponding to the foregoing compounds, for example
For example, triethylene glycol dimethyl ether (R ¹ ,
R ² : CH ₃ ), triethylene glycol diethyl ether
(R ¹ , R ² : C ₂ H ₅ ), triethylene glycol dip
Propyl ether (R ¹ , R ² : C ₃ H ₇ ), triethylene glycol
Recall dibutyl ether (R ¹ , R ² : C ₄ H ₉ ) and the like .

[0013]

[0014]

[0015]

The other component of the mixture has 10 to 13 carbon atoms.
The monoolefin, a linear or branched alkene having a carbon number of 10 to 13 (ethylenically hydrocarbon), in concrete terms, decene, undecene, dodecene, tridecene,
Tetradecene is used.

Each of these may be used alone,
Two or more kinds may be used in appropriate combination. These things
Among olefins, in terms of detergency, <br/> olefin emissions of 10 to 13 carbon atoms, in particular, alpha - olefin is preferred.

The mixing ratio of the glycol ether compound and the monoolefin in the mixture is not particularly limited, but from the viewpoint of the balance between detergency and volatility, the former 10 to 10 parts by weight of the mixture is used. It is preferably 90 parts by weight and the latter 90 to 10 parts by weight. Particularly preferably, the former is 40 to 60 parts by weight, and the latter is 60 to 4 parts by weight.
0 parts by weight.

The cleaning agent of the present invention may be used in the same manner as in the prior art, and there is no particular limitation on the method of use. For example, the connection portion of the insulated cable may be directly immersed in a cleaning agent, flushed with a spray device, or brushed with mechanical means such as human power. This detergent can be used as it is, and the temperature during use is usually room temperature. If necessary, it may be used under heating or blowing.

The amount of the detergent used in cleaning the insulated cable and the ratio of the active ingredient in the detergent are determined according to the amount of jelly to be removed and the type thereof,
What is necessary is just to select suitably considering a flash point, volatility, etc. Needless to say, known additives such as a dye for confirming the degree of washing and a perfume as a measure against odor may be appropriately added to the detergent.

[0021] Subsequent connection work can be performed on the insulated cable from which jelly has been removed in this way, and the desired connection work can be completed.

[0022]

EXAMPLES A cleaning agent was prepared by mixing the glycol ether compound and the hydrocarbon compound shown in Table 1 at the indicated mixing ratio (weight ratio). Each of the obtained detergents had almost no odor. A cleaning test of the following specifications was performed using each of these cleaning agents, and the cleaning power was evaluated. The results are shown in Table 1 together with the flash point of each cleaning agent.

For comparison, a similar cleaning test was carried out on a commercially available gasoline, Freon R-113, and the results are also shown. Washing test: A silicone oil (KF-96-50C, manufactured by Shin-Etsu Silicone Co., Ltd.) was applied to the surface of a polyethylene sample having a length of 50 mm, a width of 25 mm and a thickness of 2 mm.
3 drops (about 30 mg) of S) are dropped with a dropper. Then, 100 to 150 mg of each cleaning agent is separately infiltrated into a JK wiper (manufactured by Juzen Kimberly Co., Ltd.), and the surface of the polyethylene sample is wiped with the wiper at the indicated temperature.

The total reflection infrared absorption spectrum of the sample surface was measured, and the characteristic absorption wave number (717.5 cm ^-1 ) of polyethylene was measured.
The relative ratio of the absorption intensity of the characteristic absorption wave number (798.5 cm ^-1 ) of the silicone oil to the absorption intensity of the silicone oil is determined. The smaller the value of the relative ratio is, the less silicone oil remains on the sample surface, that is, the better the detergency of the used detergent is.

[0025]

[Table 1]

[0026]

As is apparent from the above description, the cleaning agent for insulated cables of the present invention has excellent detergency, little odor and low toxicity compared with gasoline conventionally used. . Further, since it is a non-halogen type, it does not cause destruction of the ozone layer unlike a fluorocarbon type cleaning agent. Moreover, the flash point is the charge compared to gasoline
Minute rather high, is a useful cleaning agent to say from the disaster of the plane.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Fumio Otsu 1-3-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Inside the Tokyo Electric Power Company (72) Inventor Yoshiharu Segawa 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Inside Electric Industries Co., Ltd. (72) Inventor Takamitsu Omori 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Inside Furukawa Electric Co., Ltd. (72) Inventor Junichi Maeno 3-4-33, Imafukuminami, Joto-ku, Osaka City In the laboratory of the Chemical Industry Co., Ltd. (72) Inventor Jiro Mizue 3-4-33, Imafukuminami, Joto-ku, Osaka City In the laboratory of Arakawa Chemical Industry Co., Ltd. (56) References JP-A-2-173,096 (JP, A) JP-A-61-293274 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) C11D 7/60 C11D 7/26 C11D 7/24

Claims (2)

(57) [Claims] (1) The following formula: (Wherein, R ^1, R ² may be the the same or different and each represents hydrogen or an alkyl group with carbon number. 1 to 5, m represents 2 or 3) glycol represented by d
At least one kind of a compound having 10 to 10 carbon atoms;
Mixture of 13 monoolefins as an essential component
A cleaning agent for an insulated cable, comprising: 2. The insulated cable cleaning agent according to claim 1 , wherein the mixture ratio of the glycol ether compound to the monoolefin in the mixture of claim 1 is from 10 to 90:90 to 10 by weight.