JP2547355B2 - Termite-resistant vinyl chloride composition - Google Patents

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vinyl chloride resin composition used as an electric wire coating insulating material, and in particular, it has water resistance to prevent the outflow of an anti-termite agent due to rainwater or the like, and is more effective than before. The present invention relates to a termite-resistant vinyl chloride composition capable of suppressing the damage from termites over a long period of time.

[Prior art]

In recent years, excellent synthetic resins have been made inexpensively,
In terms of easiness of molding and good durability, vinyl chloride resin products have mainly appeared in all the daily sundries such as kitchen utensils. This vinyl chloride resin is used as an insulator or a sheath because of its good insulating performance, for an insulated electric wire, a cable, or the like covering a conductor or an insulated electric wire. Such insulated wires and cables covered with vinyl chloride resin are laid indoors and outdoors and are in constant contact with the outside world, and the outermost layer is covered with a vinyl chloride resin sheath. . When this sheath comes into contact with or collides with a hard metal or the like, it is easily damaged, and in some cases even a part thereof is damaged. Humans do not intentionally damage the sheaths of the insulated wires and cables, but they were often bitten by small animals in the outside world, especially termites. Termites have the effect of chewing and melting soft materials such as synthetic resin and wood, and electric wires and cables are no exception, and there have been cases where electric wires and cables were bitten by termites. In this insulated wire, cable, etc., the synthetic resin layer covering the conductor is
It is important for insulation from the ground and preventing ground faults.Damage of insulated wires, sheaths of cables, etc., and insulation layers due to termites and mice will seriously affect the durability of insulated wires, cables, etc. Is giving. Therefore, electric wires and cables have conventionally been provided with anti-termite measures. As a countermeasure against this, the outermost coating of electric wires / cables is formed by combining two cable cores, each of which is formed by coating a conductor with an insulator, interposing an intervening material, and coating a sheath thereon. A termite resistant wire / cable in which a termite proofing agent such as fenitrothion or chlorpyrifos is added to the sheath of the layer and the termite proofing agent is kneaded is considered. Alternatively, as shown in FIG.
Two cable cores 130 formed by covering 20 are put together, an inclusion 140 is interposed, an inner sheath 160 is covered thereon, and a metal layer 170 is provided on the inner sheath 160. An electric wire / cable having an anti-termite effect by 170 and having an outer sheath 180 coated thereon is considered.

[Problems to be Solved by the Invention]

However, in the case of electric wires / cables that are formed by adding an anti-termite agent to the former outermost coating layer of the former and kneading it, it is necessary to prevent the wires / cables from being immersed in water for a long time. There is a problem in that the termite agent dissolves in water and the residual rate of the termite preventive agent becomes low, and the termite resistance is no longer maintained. In addition, in the latter case of a wire / cable in which a metal layer 170 is provided between the inner sheath 160 and the outer sheath 180 and the termite proof effect is provided by the metal layer 170, the inner sheath 160 and the outer sheath 180 are Since the metal layer 170 is provided between them,
If the metal layer 170 is a Fe tape that is not easy to handle, it will lose its ant-preventive effect due to corrosion caused by the infiltration of rainwater. Has a problem that the remaining rate of the termite becomes low, and the durability of termite resistance is lost. INDUSTRIAL APPLICABILITY The present invention can provide water resistance, can prevent the outflow of termite repellents from water, and can maintain the efficacy of termite repellents more than ever before, and suppress damage from termites for a long time. An object of the present invention is to provide a termite-resistant vinyl chloride composition that can be used. You can

[Means for Solving the Problems]

To achieve the above object, in the termite-resistant vinyl chloride composition of the present invention, the plasticizer 20 to 150 parts by weight, the stabilizer 1 to 15 parts by weight, the filler 0 to 15 parts by weight to 100 parts by weight of the vinyl chloride resin. 1 to 10 parts by weight of hydrophobic silica is added to a termite-resistant thermoplastic composition obtained by mixing 1 to 10 parts by weight of fenitrothion with a vinyl chloride resin formed by mixing 1 part by weight of hydrophobic silica. Further, in order to achieve the above object, in the termite-resistant vinyl chloride composition of the present invention, a vinyl chloride resin 10
20 to 150 parts by weight of a plasticizer, 0 to 15 parts by weight of a stabilizer, and 0 to 15 parts by weight of a filler, and 0 to 15 parts by weight of a vinyl chloride resin, and 3 parts by weight of chlorpyrifos. 1 to 10 parts by weight of hydrophobic silica is blended with a plastic composition.

[Action]

Thus, 1-10 parts by weight of hydrophobic silica is added to a termite-resistant thermoplastic composition obtained by mixing 1-10 parts by weight of fenitrothion, which is an anti-termite agent, or 3 parts by weight of chlorpyrifos, with a vinyl chloride resin. There is. This hydrophobic silica is one in which some or all of the silanol groups on the silica surface are substituted with methyl groups, and a termite-resistant thermoplastic composition in which 1-10 parts by weight of a termite-preventing agent, fenitrothion, is mixed with a vinyl chloride resin. It can be uniformly dispersed in the product and has a water-repellent effect. Therefore, the termite resistance effect can be maintained even when the termiticide such as fenitrothion or chlorpyrifos is immersed in water or warm water. That is, the outflow of the termiticide due to water or hot water can be prevented, the effect of the termiticide can be maintained more than before, and damage from termites can be suppressed for a long period of time.

【Example】

Examples of the present invention will be described below. Specific examples of the present invention will be described in comparison with comparative examples and conventional examples. Example 1 In this example, a vinyl chloride resin (specifically, a polymerization degree of 13
00 vinyl chloride resin) 100 parts by weight, dioctyl phthalate (DOP) 45 parts by weight, tribasic lead sulfate 4 parts by weight, barium stearate 1 part by weight, calcium carbonate 30 parts by weight, fenitrothion (specifically, 1 part by weight of Tomigard CX manufactured by Yoshitomi Pharmaceutical Co., Ltd. and 2 parts by weight of hydrophobic silica (Aerosil R-972 manufactured by Nippon Aerosil Co., Ltd.) are blended. Example 2 In this example, a vinyl chloride resin (specifically, a polymerization degree of 13
100 parts by weight of vinyl chloride resin (00), 45 parts by weight of dioctyl phthalate (DOP), 4 parts by weight of tribasic lead sulfate, 1 part by weight of barium stearate, 30 parts of calcium carbonate.
1 part by weight of fenitrothion (specifically, Tomigard CX manufactured by Yoshitomi Pharmaceutical Co., Ltd.) and 1 part by weight of hydrophobic silica (Aerosil R-972 manufactured by Nippon Aerosil Co., Ltd.). Example 3 In this example, a vinyl chloride resin (specifically, a polymerization degree of 13
100 parts by weight of vinyl chloride resin (00), 45 parts by weight of dioctyl phthalate (DOP), 4 parts by weight of tribasic lead sulfate, 1 part by weight of barium stearate, 30 parts of calcium carbonate.
1 part by weight, 3 parts by weight of chlorpyrifos (specifically, Rentorek manufactured by Sankyo Co., Ltd.), and 1 part by weight of hydrophobic silica (Aerosil R-972 manufactured by Nippon Aerosil Co., Ltd.). Example 4 In this example, a vinyl chloride resin (specifically, a polymerization degree of 13
100 parts by weight of vinyl chloride resin (00), 45 parts by weight of dioctyl phthalate (DOP), 4 parts by weight of tribasic lead sulfate, 1 part by weight of barium stearate, 30 parts of calcium carbonate.
10 parts by weight of fenitrothion (specifically, Tomigard CX manufactured by Yoshitomi Pharmaceutical Co., Ltd.) and 10 parts by weight of hydrophobic silica (Aerosil R-972 manufactured by Nippon Aerosil Co., Ltd.). Example 5 In this example, a vinyl chloride resin (specifically, a polymerization degree of 13
100 parts by weight of vinyl chloride resin (00), 45 parts by weight of dioctyl phthalate (DOP), 4 parts by weight of tribasic lead sulfate, 1 part by weight of barium stearate, 30 parts of calcium carbonate.
1 part by weight of fenitrothion (specifically, Tomigard CX manufactured by Yoshitomi Pharmaceutical Co., Ltd.) and 10 parts by weight of hydrophobic silica (Aerosil R-972 manufactured by Nippon Aerosil Co., Ltd.). Comparative Example A comparative example is a vinyl chloride resin (specifically, a polymerization degree of 1300
100 parts by weight of vinyl chloride resin), 45 parts by weight of dioctyl phthalate (DOP), 4 parts by weight of tribasic lead sulfate,
1 part by weight of barium stearate, 30 parts by weight of calcium carbonate, 2 parts by weight of fenitrothion (specifically, Tomi Guard CX manufactured by Yoshitomi Pharmaceutical Co., Ltd.), and 0.5 parts by weight of hydrophobic silica (Aerosil R-972 manufactured by Nippon Aerosil Co., Ltd.) are blended. It was done. Conventional Example 1 Conventional Example 1 is a vinyl chloride resin (specifically, a polymerization degree of 13
100 parts by weight of vinyl chloride resin (00), 45 parts by weight of dioctyl phthalate (DOP), 4 parts by weight of tribasic lead sulfate, 1 part by weight of barium stearate, 30 parts of calcium carbonate.
1 part by weight of fenitrothion (specifically, Tomigard CX manufactured by Yoshitomi Pharmaceutical Co., Ltd.). Conventional Example 2 Conventional Example 2 is a vinyl chloride resin (specifically, a polymerization degree of 13
100 parts by weight of vinyl chloride resin (00), 45 parts by weight of dioctyl phthalate (DOP), 4 parts by weight of tribasic lead sulfate, 1 part by weight of barium stearate, 30 parts of calcium carbonate.
1 part by weight and 3 parts by weight of fenitrothion (specifically, Tomigard CX manufactured by Yoshitomi Pharmaceutical Co., Ltd.) were mixed. Conventional Example 3 Conventional Example 3 is a vinyl chloride resin (specifically, a polymerization degree of 13
100 parts by weight of vinyl chloride resin (00), 45 parts by weight of dioctyl phthalate (DOP), 4 parts by weight of tribasic lead sulfate, 1 part by weight of barium stearate, 30 parts of calcium carbonate.
1 part by weight, and 3 parts by weight of chlorpyrifos (specifically, Rentorek manufactured by Sankyo Co., Ltd.) are blended. Termite efficacy test (ant bite test) on vinyl chloride compositions based on these examples, vinyl chloride compositions at 70 ° C
Table 1 shows the comparison results of the termite resistance test (ant bite test) after immersion in 120 h of warm water. The termite resistance test (termite bite test) shown in Table 1 is performed in the following manner. That is, a vinyl chloride composition based on Examples, and a vinyl chloride composition based on Comparative Examples,
50m long for each of the conventional vinyl chloride compositions
A roll sheet of a test piece of m, width 50 mm, thickness 5 mm was prepared (roll temperature 160 ° C. × 5 minutes), and gypsum was hardened to a thickness of 5 mm at the bottom of a cylindrical container having a diameter of 8 cm and a depth of 6 cm. On the container,
The test piece and the termite are added. Then, prepare a container in which a wet absorbent cotton is spread in a thickness of about 2 cm on the bottom surface of another water tank type glass container in advance, place the above cylindrical container on this, and test the test container at a temperature of 28 ± The figures show the numbers of termite mortality observed and recorded after one week of standing in the dark at 2 ° C. This test termite used 150 worker ants and 15 soldier ants for each test piece. In addition,
The ant bite test is evaluated as good when all 165 termites have died. The termite resistance test after immersion in water in Table 1 is the termite resistance test (ant bite test) after the test piece was immersed in hot water at 70 ° C for 120 hours, and is carried out in the following manner. . That is, for each of the vinyl chloride composition based on the example, the vinyl chloride composition based on the comparative example, and the vinyl chloride composition of the conventional example, 50 mm in length, 50 mm in width, and a roll sheet of a 5 mm thick test piece are prepared. (Roll temperature 160 ° C. × 5 minutes), and each test piece is immersed in hot water at 70 ° C. for 120 hours. Furthermore, this test piece, 8 cm in diameter, 6 cm in depth, on the bottom of a cylindrical container of gypsum on a container hardened to a thickness of 5 mm, put,
Place the termites in this container. Then, prepare a container in which a wet absorbent cotton is spread in a thickness of about 2 cm on the bottom surface of another water tank type glass container in advance, place the above cylindrical container on this, and test the test container at a temperature of 28 ± The figures show the numbers of termite mortality observed and recorded after one week of standing in the dark at 2 ° C. This test termite used 150 worker ants and 15 soldier ants for each test piece. In addition,
The ant bite test is evaluated as good when all 165 termites have died. For all the examples in Table 1 (No. 1 to No. 5), the test results in termite efficacy test were 165 dead termites, and the termite efficacy test was evaluated as good. , Ant-proof effect is recognized. Regarding the ant-preventing effect, even in the test results in the water-terminated termite resistance test after immersion in hot water of 70 ° C. for 120 hours, the ant bite test was performed, all the examples (No. 1 to No. 5) were dead. The number of termites is 165, and even if the termite-resistant thermoplastic composition is immersed in water or warm water for a long period of time, it has the same ant-repellent effect as that before the immersion in water or warm water. The effect is recognized. That is, even when the termite-resistant thermoplastic composition is immersed in water or warm water for a long period of time, the persistence of the termite-preventing agent such as fenitrothion and chlorpyrifos in the termite-resistant thermoplastic composition is observed. This is that obtained by blending hydrophobic silica is that Example No. 1 is a hydrophobic silica in the composition of Conventional Example No. 1, Example No. 3 is a conventional example No. 3. It is clear from the fact that the composition was blended with hydrophobic silica, and Example No. 5 was obtained by blending the composition of Conventional Example No. 2 with hydrophobic silica. That is, it is clear that the hydrophobic silica has an effect of suppressing the outflow of the termite control agent from the termite-resistant thermoplastic composition when the termite-resistant thermoplastic composition is immersed in water or warm water for a long time. is there. The effect of suppressing the outflow of the anti-termite agent by the hydrophobic silica is that the compounding amount of the hydrophobic silica is 2 parts by weight of Example No. 1, 1 part by weight of Examples No. 2 and No. 3, No.4, No.5
The same effect is obtained in each case of 10 parts by weight. That is, the blending amount of the hydrophobic silica is related to the blending amount of fenitrothion, but it can be seen that the effect is obtained if the blending amount is 1 part by weight or more. Further, the termite control effect of fenitrothion is that the compounding amount of fenitrothion is 1 part by weight of Examples No. 1 and No. 5, 3 parts by weight of Example No. 2 and 10 parts by weight of Example No. 4, respectively. In the case of, the same effect is obtained. That is, although the blending amount of fenitrothion varies depending on the blending amount of the hydrophobic silica, it is clear that if 1 part by weight is blended, a sufficient effect can be obtained by changing the blending amount of the hydrophobic silica. Further, comparing Example No. 2 and Example No. 3, it is found that Example No. 2 and Example No. 3 contain 3 parts by weight of fenitrothion as an antitermite agent. The composition of Example No. 3 is exactly the same, except that 3 parts by weight of chlorpyrifos is blended as an anti-termite agent. That is, Example No. 2 and Example No. 3 differ only in the termite control agent to be compounded. Example No. 2 and Example No. 3 in which the type of the ant-preventive agent is different have the same ant bite test result. That is, this indicates that the same result can be obtained by using either fenitrothion or chlorpyrifos as the termiticide. On the other hand, Comparative Example No. 1 in Table 1 has 2 parts by weight of fenitrothion and 0.5 parts by weight of hydrophobic silica, and the composition is the same as the vinyl chloride composition based on the examples, although the compounding amounts thereof are different. The test results in the termite efficacy test of the test sample prepared by the vinyl chloride composition based on this Comparative Example No. 1, the number of dead termites is 165, the termite effect is recognized, but termite resistance after water immersion The result of the efficacy test is 103 dead termites, and the evaluation of the ant bite test is poor. That is, it is understood that fenitrothion is blended in 2 parts by weight, but since the blending amount of the hydrophobic silica is 0.5 parts by weight, the effect of suppressing the outflow of the termite controlling agent by the hydrophobic silica does not work. In addition, the conventional examples (No. 1 to No. 3) in Table 1 contain fenitrothion (No. 1, No. 3) or chlorpyrifos (No. 2) which is an antitermite, but are hydrophobic. No silica was added. Therefore, the test result in the termite efficacy test of the test sample prepared by the vinyl chloride composition based on the conventional example (No.1 to No.3) shows that the number of dead termites is 165, and the termite-preventing effect is recognized. However, the test result in termite efficacy test after immersion in water showed that the number of dead termites was 10 (No.
1), 54 (No.2), 51 (No.3)
It is defective. That is, the vinyl chloride compositions based on the conventional examples (No. 1 to No. 3) contain 1 to 3 of the termiticide fenitrothion (No. 1, No. 3) or chlorpyrifos (No. 2).
Although it is mixed in parts by weight, since hydrophobic silica is not mixed in at all, the termite control agent loses its long-lasting effect by being dissolved and extracted in water or warm water. It represents.

【The invention's effect】

Since the present invention is configured as described above,
The following effects are achieved. 1 to 10 parts by weight of a termite-preventing agent, fenitrothion, in a vinyl chloride resin is added to a termite-resistant thermoplastic composition.
Since it contains 10 parts by weight of hydrophobic silica, it can be made water resistant and can prevent the outflow of termite control agents from the termite resistant thermoplastic composition when immersed in water or warm water for a long time. , It is possible to suppress the damage from termites over a long period of time by making the termite repellent more effective than before. Chlorpyrifos, an anti-termite agent, added to vinyl chloride resin
By adding 1 to 10 parts by weight of hydrophobic silica to a termite-resistant thermoplastic composition blended by weight, water resistance can be imparted, and termite resistance when immersed in water or warm water for a long time It is possible to prevent the outflow of the termite control agent from the thermoplastic composition, to maintain the efficacy of the termite control agent more than before, and to suppress damage from termites for a long period of time.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an anti-termite rodent electric wire / cable. 110 ... Conductor 120 ... Insulator 130 ... Cable core 140 ... Inclusion 160 ... Inner sheath 170 ... Metal layer 180 ... Outer sheath

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location H01B 3/44 H01B 3/44 P 7/28 7/28 D

Claims (2)

(57) [Claims] 1. A plasticizer 20 to 150 per 100 parts by weight of a vinyl chloride resin.
Fenitrothion 1 to vinyl chloride resin composed of 1 part by weight, 1 to 15 parts by weight of stabilizer, and 0 to 15 parts by weight of filler.
~ 10 parts by weight to the termite resistant thermoplastic composition,
Termite-resistant vinyl chloride composition comprising 1 to 10 parts by weight of hydrophobic silica 2. Plasticizer 20-150 per 100 parts by weight of vinyl chloride resin
1 part by weight, 1 to 15 parts by weight of a stabilizer, and 0 to 15 parts by weight of a filler are mixed, and 3 parts by weight of chlorpyrifos is added to a vinyl chloride resin. 1-10 parts by weight of a termite-resistant vinyl chloride composition.