JPS5942709A - Vinyl chloride resin composition for ant preventive agent-containing colorable wire - 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 The present invention relates to a colorable coating composition for electric wires which is completely free from termite damage and is based on a vinyl chloride resin.

More specifically, the plasticizer is premixed with specific fast-acting and slow-acting termiticides, and a predetermined amount of the termiticide is mixed into the compounding material used together with the plasticizer gold-vinyl chloride resin to produce a colorable electric wire. The present invention relates to a coating composition for use in the present invention.

When burying electric wires and cables in areas where termites live,
Electric wires and cables are often damaged by termites, which deteriorates the electrical properties of the wire and cable sheathing materials, sometimes leading to short circuits.

Dieldrin was mixed into the covering material of electric wires and cables buried in such places to prevent ants, but dieldrin is highly toxic to humans and animals, and when it is mixed into the covering material, thorough measures must be taken during work. Its use is currently prohibited in Japan because it is undesirable from the standpoint of lubrication and environmental pollution.

Against this background, we have created a termite repellent that has excellent termite repellent effects, has a long-lasting medicinal effect, is non-toxic to humans and animals, and is easy to mix into coating materials. Although it is effective by itself with a specific organic phosphorus compound that has a strong effect, a high concentration of organic acid metal salt is mixed into the coating material at a certain blending ratio to maintain and supplement the effect of a fast-acting termiticide.
He discovered that these coating materials had extremely long-lasting effects, and filed a patent application in 1982-12274 on a manufacturing method for these coating materials.
No. 8 and 4T-Application No. 57-54095 were filed.

PVC resin compositions for electric wires can be divided into insulation and sheath formulations depending on the intended use, but basically they are made by adding plasticizers, stabilizers, fillers, etc. to vinyl chloride resin in various proportions, and further forming them as desired. Appropriate amounts of various coloring agents are added to give it a vivid color, and it is used as a covering material.

However, if all of the specific organic phosphorous compounds of termiticides are used in these formulations for electric wires, the vinyl chloride resin composition itself changes to a dull color before the colorant is applied, making it impossible to achieve the desired coloring and preventing electric wires from being colored as desired. - It was found that when used as a cable covering material, its commercial value was significantly impaired.

In coating materials for electric wires and cables that require multiple colors, vinyl chloride resin compositions containing termiticides discolor to dull colors, so if they are used only in a very narrow range, their utility value will be low.

As a result of further studies to solve these problems, the present inventor found that by using all of the selected anti-discoloration stabilizers, it is possible to achieve vivid coloring. He discovered that it was only necessary to color it black, etc., and completed the invention.

The present invention consists of a blend system of vinyl chloride resin, plasticizers, stabilizers, fillers, etc. in various blending ratios, and a specific organic phosphorus compound that has an immediate and strong effect on termites and maintains its effect. Colorable vinyl chloride for electric wires containing a termiticide, characterized in that after uniformly mixing an auxiliary termiticide of a supplementary organic acid metal salt, the wire is heated and colored by adding a coloring agent to the desired color. It is a resin composition.

The organic compounds of the fast-acting termiticide used in the present invention include fenitrothion, phoxim, chlorpyrifos,
These include acephate, chlorpyri 7-osmethyl, prothiophos, cyanophos, etc., and one or more of them are used.

It is desirable that the amount of the fast-acting termiticide incorporated in the vinyl chloride resin composition is at least 0.5% by weight or more.

Organic acid metal salts that maintain and supplement the effects of fast-acting termiticides include zinc persate, zinc octylate, copper naphthenate,
These are organic acid metal salts such as dibasic lead phthalate, zinc laurate, and dioctyltin dilaurate, and one or more of them are used.

The amount incorporated in the vinyl chloride resin composition is at least 0.
It is desirable that the content be 4% by weight or more.

Some of these organic acid metal salts are similar to stabilizers used for vinyl chloride resins, but when used in combination with them, it is desirable to use U1% by weight or more.

Next, the plasticizer used in the present invention includes di(2-ethylhexyl) phthalate, di-n-octyl heptathalate, diisobutyl phthalate, etc., but is not limited thereto.

In addition, the colorant can be commercially available paste color, color batch,
Color pellets, etc., and the filler is also a commercially available one.
It:i VC-limited.

Stabilizers for preventing discoloration used in formulations that can produce vivid colors include Li, Mg, Oa, Ba, Elr, and Z.
n, organic acid metal salts such as Sn, organic tin compounds, organic stabilizing aids, etc., and Oa-Zn series, Ba-Zn
Composite stabilizers may also be used, and one or more of them may be used.

When these stabilizers for preventing discoloration are used, the vinyl chloride resin composition containing the termiticide exhibits a natural color and can be easily colored into a desired color with the coloring agent.

The compounded stabilizers that cannot provide the desired coloring are Pb-based organic acid salts, p'b-based inorganic compounds, and Zn and Ca-based organic acid salts.

When using a Ca-based organic acid salt stabilizer, use Opb-based organic acid salts and Pb, which can be colored yellow-green-orange with a coloring agent, since the composition itself exhibits a yellow color.
When using the stability rule of inorganic compounds of yarn, the composition itself is grayish-black-black, so it can be colored grayish-black with a coloring agent.

When using a stabilizer consisting only of a Zn-based organic acid salt, the composition itself exhibits a brownish-black color, so it can be colored brownish-black-black with a coloring agent.

As explained above, in the present invention, if a selected stabilizer is used in the blending system of a vinyl chloride resin composition, even if all termiticides are added, the coloring agent can be used to color the electric wire and the desired color.
It can be effectively used not only as a coating material for cables but also for other vinyl chloride resin compositions for the same purpose.

Examples of the present invention will be described below.

The test evaluation consisted of making all the formulations of vinyl chloride resin compositions with and without the addition of termiticides, kneading them in a test roll at 170°C for 10 minutes in order to match the actual conditions of extrusion coating on electric wires and cables. A sheet with a thickness of 2 ran was prepared by heating and pressurizing at 175° C. for 5 minutes, and the state of discoloration due to the relationship between the termiticide and the stabilizer was visually observed and evaluated.

Table 1 shows example formulations that give a natural color when a fast-acting termiticide and an auxiliary termiticide of an organic acid metal salt that maintains and supplements its effect are mixed into each formulation of the vinyl chloride resin composition. .

Table 2 corresponds to Table 1, and is an original reference example formulation in which termiticides are not added.

Table 6 shows the results showing the state of no discoloration in the relationship between the termiticide and the stabilizer for preventing discoloration corresponding to Table 1.

Table 4 shows the results of discoloration in the original reference example formulation in which no termiticide was added, corresponding to Table 2.

As seen from Table 4, Reference Example A I, 2.6.4
Single stabilizers such as Li, Mg, Ca, Ea, Sr etc. of ゜6 cause the color to change to brown, a single Sn-based stabilizer of A7 causes the color to change to yellow, and pure organic stabilizing aids of A8 and 9 change the color to brown. However, the composite stabilizer A5.10.11.12 does not change color and exhibits a natural color.

However, according to the results in Table 6, all of the discolored samples in Table 4 changed to natural colors. This phenomenon is considered to be the effect of the presence of Zn in the auxiliary termiticide of the organic acid metal salt.

Therefore, Li, Mg, Ca, Ba, Sr,
In formulations in which an organic acid metal salt such as Sn, an organic tin compound, and an organic stabilizing aid are used alone as stabilizers, the Zn-based organic acid A salt stabilizer may be added separately.

That is, Li-Zn, Mg-Zn, 0a-Zn
, Ba-Zn, 19r-Zn.

-5n-Zn, Zn-organotin compound, and Zn-pure organic stabilizing aid based composite stabilizers allow the composition to have a natural color even if a termiticide is added, so any desired color can be created using a coloring agent. Table 5 shows that when a fast-acting termiticide is mixed with an auxiliary termiticide of an organic acid metal salt that maintains and supplements the effect of the vinyl chloride resin composition, the composition This is an example formulation that changes color.

In correspondence with Table 5, Table 6 is an original reference example formulation in which no termiticide is added.

Table 7 shows the results showing the state of discoloration in the relationship between termiticides and stabilizers corresponding to Table 5.

Table 8 shows the results showing the state of discoloration in the original reference example formulation in which no termiticide was added, corresponding to Table 6.

As can be seen from Table 8, when a Zn-based sole stabilizer was used in Reference Example 15, the color changed to brownish-black, but the others exhibited a natural color.

However, in the results of the blended systems containing the termiticides in Table 7, all the compositions that had natural colors in Table 8 changed color.

That is, the Fb-based stabilizer of Example A15 changed the color to grayish black, and the Ca-based stabilizer of A14 changed the color to yellow.
When the Zn-based stabilizer in No. 5 was used alone, the color changed to brownish-black, and A I6.
All of the Pb-based inorganic stabilizers listed in 17, 18, and 19 change color to black.

Therefore, in the case of a compound system that changes color when a termiticide is mixed in, the gray-black color is changed from gray-black to black by the colorant, the yellow color is changed from yellow-green to orange by the colorant, and the brown-black and black color is changed to a deep brown color by the colorant. -You can make it black.

Next, Table 9 shows the results of the termite prevention test in Examples.

For the ant control test, the test piece size was 50 x 50 x 2 mm.
For each piece, 150 house termites, worker ants, and 15 soldier ants were used.

Plaster is placed at the bottom of a cylindrical container with a diameter of 1 cm and a depth of 37 cm, and the entire test piece is placed on top of the gypsum and termites are placed on top of it.

Separately, line the bottom and surface of a suitably sized aquarium-shaped glass container with damp absorbent cotton, and place the cylindrical container on top of it.Place such a test device in a constant temperature bath at a temperature of 28 ± 1°C. Termite mortality was observed.

The results in Table 9 show that when the fast-acting termiticide is 21 parts by weight for 100 parts by weight of vinyl chloride resin, the mortality rate is 10 parts in one week.
05!6, but it has been separately confirmed that if the amount is 4 parts by weight, the mortality rate will be 100% in 6 to 4 days.

In the reference example, the termites die because the test piece does not serve as a nutrient source.

Further, in field tests conducted over five years, the composition according to the present invention has not caused termite damage at all.

As explained above, the present invention incorporates a quick-acting termiticide and an auxiliary termiticide of an organic acid metal salt into the blending system of a vinyl chloride resin composition to exhibit a sustained effect, and the composition It has been revealed that PVC resin compositions can be vividly colored to any desired color using a coloring agent. Therefore, PVC resin compositions can be applied not only to electric wires, but also to other industrial fields for the same purpose, such as for termite prevention. Since it can also be used in vinyl chloride resin compositions, it has great industrial practical value.

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Claims (1)

[Claims] In a composition formed by blending a plasticizer, a stabilizer, a lubricant, a filler, etc. with a vinyl chloride resin, organic phosphorous compounds such as fenitrothion, phoxim, chlorpyrifos, acephate, chlorbilifos-methyl,
A termiticide characterized by mixing one or more of Grothiophuos, Cyanoaus, or one or more organic acid metal salts having a synergistic sound effect into the entire composition, and coloring it into a desired color with a coloring agent. A vinyl chloride resin composition for electric wires that can be colored.