JPS6127010A - Antpreventive, ratpreventive wire and cable - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an ant-proof, rat-proof electric wire and cable that are both termite-proof and rat-proof.

[Conventional technology]

Recently, there has been a demand for electric wires or cables that are both termite-proof and rat-proof. Known electric wires or cables that meet these requirements include wires or cables that are extruded and coated with resin compositions containing termiticides and rodent repellents to form termite- and rodent-proof coatings. .

[Problems that invention zero attempts to solve]

However, with extrusion coatings made of resin compositions containing termiticides and rodent repellents, the termiticides or rodent repellents volatilize due to the heat generated during the molding process of the coating, contaminating the working environment, and also cause thermal decomposition. and the residual rate of these in the coating decreases,
In order to obtain a sufficient #A% rodent repellent effect, a large amount must be added, resulting in an increase in manufacturing costs and a problem of deterioration of the heat resistance, mechanical properties, etc. of the coating itself.

Means for Solving Problem c] Therefore, in the present invention, a termiticide and a rodent repellent are included with cyclodextrin to form a stable clathrate compound, and this is mixed into a resin composition and extrusion coated. I decided to do so.

The termiticides used here include copper compounds such as copper naphthenate and cuprous oxide, organic phosphorus compounds such as chlorpyrifos, phoxim, chlorphoxine, fenitrothion, and tocthione, carbamite-based compounds such as carvaline and futeboxa, Pyrethroids such as permethrin and flamethrin are used.

In addition, as rodent repellents, organic tin compounds such as cycloheximide (naramycin), diptyltin oxide, and dibutyltin laurate are used.

And these termiticides and rodent repellents are siflovkis)
It is classified as an inclusion compound by IJ. Specifically, a termiticide and a rodent repellent are mixed in a predetermined ratio and dissolved in an organic solvent, and an appropriate amount of cyclodextrin is added thereto and stirred. Cyclodextrin has a large space within its molecule, and a termiticide or rodent repellent is coordinated within this space and hydrogen bonds with the cyclodextrin, producing a stable clathrate compound.

The organic solvent is then removed by appropriate means.

A powdered clathrate compound is obtained. Alternatively, the termiticide and rodent repellent are dissolved separately in an organic solvent, and added to the solution (IJ).
Separate clathrate compounds of termiticides and rodenticides may be obtained in the same manner by adding and stirring the mixture.

The content of termiticide and/or rodent repellent in the clathrate compound varies depending on the type of termiticide or rodent repellent;
It is considered to be 0 to 50 weight. Furthermore, in the case of a clathrate compound containing a termiticide and a termiticide at the same time, the ratio of the amounts of the two can be determined as appropriate depending on the intended use of the resulting electric wire and cable.

Next, a predetermined amount of this clathrate compound is added to a resin composition that will be used as a coating for an electric wire or cable. A clathrate compound containing a termiticide and a clathrate compound containing a rodent repellent are mixed in a predetermined ratio and then added to the resin composition, or the termite and rodent repellent are mixed in a predetermined ratio. At the same time, the included clathrate compound is added to the resin composition.

As the above-mentioned resin composition, a synthetic resin composition mainly composed of polyvinyl chloride resin, polyethylene resin, etc., or a synthetic rubber composition mainly composed of chloroprene rubber, ethylene propylene rubber, etc. can be arbitrarily selected depending on the purpose etc. . At this time, the amount of the above-mentioned clathrate compound added should be significantly smaller than the amount of conventional termiticides or rodent repellents, since thermal decomposition and volatilization of the internal termiticide or rodent repellent are small. The concentration of the termiticide or rodenticide can usually be in the range of 0.1 to 5% by weight.

The resin composition to which the clathrate compound has been added is then kneaded by a well-known kneading means, and then extruded and coated onto the wire insulation or cable sheath surface using an extruder equipped with a cross-layer die. It is considered to be an electric wire or cable with an ant- and rodent-proof coating. During this molding process, the termiticide and rodent repellent are protected as clathrate compounds, making them difficult to thermally decompose and volatilize; It is desirable to carry out the process at as low a temperature as possible. Therefore, while considering the mechanical properties, electrical properties, etc. of the anti-termite coating, increase the amount of liquid additives such as plasticizers, and improve the flowability at low temperatures. ), and the thickness of the anti-termite and anti-mouse coating is not particularly limited, but is generally 0.1 to 3+! u11
be reduced to a certain degree.

It should be noted that it is not just a product that forms an anti-termite or rodent-proof coating on the surface of an electric wire insulator or a cable sheath, but rather a resin composition that forms an electric wire insulator or a cable sheath. By adding a suitable amount of a compound and extrusion molding to form an insulator or sheath, these materials themselves can be made to have anti-termite and rodent-proof properties, thereby serving as an anti-termite and rodent-proof coating.

Further, a protective material made of a highly breathable, open-woven fabric, knitted fabric, etc. may be provided on the outside of this coating to protect it.

[Effect]

For such termite- and rodent-proof wires and cables, the termite- and rodent-proofing agent contained in the termite- and rodent-proofing coating is added as a stable clathrate compound with cyclodextrin. Therefore, the amount of volatilization and thermal decomposition caused by the heat during molding processing is significantly reduced, and the effective survival rate in the coating is increased. Therefore, the amount of termiticide and rodent repellent added is small, and ant- and rodent-proof electric wires and cables with high termite- and rodent-proofing effects can be manufactured at low cost. Furthermore, since termiticides and rodent repellents do not volatilize, the working environment of the processing plant is not contaminated with gases from these chemicals.

〔Example〕

Hereinafter, experimental examples will be shown to clarify the effects of the present invention.

(Experiment Example 1) Chlorpyrifos as a termiticide and cyclohegisiimide (naramycin) as a rodent repellent were mixed at a tx weight ratio of 2:1 and dissolved in an organic solvent, and an appropriate amount of cyclodextrin was mixed therein and stirred. and was made into an clathrate compound. Then, the organic solvent was removed to obtain a powdery clathrate compound having a chlorpyrifos content of 20% by weight and a cycloheximide content of 10% by weight. Then, this powdered clathrate compound was added to the polyvinyl chloride resin composition in the following amount.

Polyvinyl chloride resin 100 parts by weight Dioctyl phthalate 50 parts by weight Calcium carbonate 2
0 parts by weight Organotin-based stabilizer 5 parts by weight Powder clathrate compound 9.2 parts by weight This mixture was mixed in a mixer, kneaded in a Banbury mixer, and then mixed in an extruder equipped with a cross-layer rad die. A termite and rat-proof coating with a thickness of 1.0 U was formed on the cable sheath. The extrusion temperature was 160°C.

A portion of this anti-termite and anti-mouse coating was collected, and the amount of residual chlorpyrifos and residual cycloheximide contained therein was analyzed and quantified by infrared analysis. As a result, the amount of residual chlorbirifos was 0.95% by weight and the residual rate was 95%, and the amount of residual cycloheximide was 0.46% by weight and the residual rate was 92%.

(Experimental Example 2) Chlorpyrifos was dissolved in an organic solvent, cyclodextrin was mixed therein, stirred, and the organic solvent was removed to obtain a powdery clathrate compound having a chlorpyrifos content of 30% by weight. In the same manner, a powdery clathrate compound having a cycloheximide content of over 30% by weight was obtained. These two types of clathrate compounds were added to the polyvinyl chloride resin composition used in Experimental Example 1. The cycloheximide clathrate compound was added in 1.7 doses to form a similar anti-termite and anti-mouse coating. Regarding this product, the amount of residual lorvilfos and the amount of residual cycloheximide were determined in the same manner as in Experimental Example 1 above. The amount of residual chlorvirphos is 0.94% by weight, with a residual rate of 95, and the amount of residual cycloheximide is 0.45%.
The residual rate was 901% by weight.

(Example 3) The clathrate compound prepared in Experimental Example 1 was mixed with polyethylene at a weight ratio of 1:1, and an ant- and rat-proof masterbatch was produced using an extrusion granulator. For this masterbatch 10Vc, polyethylene berene) 90%.

and extrusion coating onto stranded conductors using an extruder.

When the residual amount of this product was determined in the same way, the residual amount of chlorbilifos was 0.87% by weight and %'A survival rate 8
In Section 7, the residual cycloheximyl content was 0.44% by weight, and the residual rate was 88%. [Effects of the Invention] As explained above, the termite- and rat-proof electric wires and cables of the present invention have the following properties: The electric wire or cable is extruded and coated with a resin composition containing a clathrate compound in which termiticides and rodent repellents are encapsulated with cyclodextrin, so the termiticide or rodent repellent is removed by the heat during the molding process. 9, which is thermally decomposed, hardly volatilizes and is contained at a high residual rate, so high anti-counterfeit and ant-proof effects can be obtained with a small amount of addition. It has an ant and rat repellent effect and can be produced at low cost.
No termite or rodent repellent gas is generated during processing, so there is no contamination of the working environment. Furthermore, when an anticide and a rodent repellent are added separately as clathrate compounds to the aI@composition, the anticide and rodent repellent are not directly mixed, so there are no anticides that are contraindicated in combination. A combination of rodent repellent and rodent repellent can also be used.

Claims (1)

[Claims] An anti-termite and anti-mouse electric wire/cable, characterized in that an electric wire or cable is coated by extrusion with a resin composition containing a termiticide and a rodent repellent clathrated with cyclodextrin.