JPS6311326B2 - - Google Patents

Description

[Detailed description of the invention]

A. Industrial Application Field The present invention relates to a repellent having a feeding damage inhibiting effect on textile pests. More specifically, the present invention is stable even at relatively high temperatures, does not have an adverse effect on plastics, metals, paints, etc., and has low toxicity to the human body.
Moreover, the present invention relates to a repellent having an excellent feeding damage suppressing effect and a long-lasting effect. B. Conventional technology Traditionally, as insect repellents for fibers such as wool and silk, cypress, naphthalene, paradichlorobenzene, etc. have been commonly used. Among these, paradichlorobenzene has a strong insecticidal effect and is inexpensive. is the most widely used. However, this paradichlorobenzene
It is an organochlorine-based chemical with a high vapor pressure, and has strong insecticidal power against textile pests at saturated concentrations, but when used in large quantities at high concentrations in a highly airtight environment, it has a characteristic odor and is harmful to the human body. It has the disadvantage that it has an undesirable effect on the polystyrene molded product, and that it alters and deforms the polystyrene molded product when it comes into contact with it. On the other hand, naphthalene and camphor have the disadvantage of low feeding damage control efficacy against textile pests. To compensate for this, various synergists have been proposed to enhance the insect repellent efficacy of naphthalene and camphor. (Japanese Patent Application Laid-open No. 53-109938, JP-A No. 54-101425, JP-A No. 59-42302
Publication No. 59-43445, etc.). However, these crystalline insect repellents made of a combination of naphthalene and a synergist or camphor and a synergist will liquefy if left in a temperature environment of around 40 to 50 degrees Celsius for a long period of time, such as during product storage. Or, if it comes into direct contact with plastic products such as polystyrene, metal foil, etc., it has the disadvantage of altering, deforming, and discoloring these products. C. Problems to be Solved by the Invention The purpose of the present invention is to overcome the drawbacks of these conventional synergists for naphthalene or camphor, to avoid liquefaction even at relatively high temperatures, and to be able to be used in plastics, metals, and paints. To provide a textile insect repellent that does not have a negative effect on insects, has a long-lasting insect repellent effect, and is highly safe for the human body. D. Means for Solving the Problems As a result of various studies on synergists to be used in combination with naphthalene or camphor, the present inventor found that the combinations of naphthalene and succinic acid and camphor and succinic acid could be used for the above purpose. We have found that the invention is compatible, and have completed the present invention based on this knowledge. That is, the present invention provides a textile pest repellent containing a combination of naphthalene and succinic acid and a combination of camphor and succinic acid as active ingredients. Succinic acid (also known as ethylene dicarboxylic acid) used in the textile pest repellent of the present invention has a melting point of 185°C and a boiling point of
It is a white crystal with a temperature of 235℃, and is also used as a food additive, and is a compound whose safety for the human body has been confirmed. However, succinic acid itself is not known to act as an insect repellent or insecticide. However, it was completely unexpected that when succinic acid was combined with naphthalene or camphor, it exerted a synergistic feeding inhibiting effect as a synergist that significantly increased the feeding damage inhibiting effects of naphthalene and camphor against textile pests. Ta. The optimum mixing ratio of succinic acid to naphthalene or camphor depends on the sealability, size, material, etc. of the container used, but is usually selected in the range of 1 to 30% by weight relative to naphthalene or camphor. Since the vapor pressure of succinic acid at room temperature is approximately 1/20 that of naphthalene, the content of succinic acid tends to increase over time. Therefore, if the initial mixing ratio of succinic acid is too high, only succinic acid will remain after naphthalene or camphor has completely evaporated, which is undesirable, and if it is too low, the synergistic feeding inhibition effect will not be effectively exerted. Therefore, the mixing ratio of succinic acid to naphthalene or camphor is preferably within the above range. E Effects of the Invention The textile pest repellent of the present invention is a combination of naphthalene or camphor with succinic acid as a synergist, and has an excellent feeding damage suppressing effect and a long-lasting effect. Moreover, it is safe and has low toxicity to the human body. Furthermore, unlike conventional products, it does not liquefy at all even if left in a relatively high-temperature environment of 40 to 50 degrees Celsius for a long period of time, and even if it comes into direct contact with plastic products such as polystyrene, it will not deteriorate in quality. It is an extremely practical textile pest repellent as it does not deform or change the color tone of metal foil or paint. F. Examples Next, the present invention will be explained in more detail with reference to Examples. Example 1 A repellent was prepared by mixing 1 g of succinic acid crystals and 20 g of naphthalene. Weigh 1g of this repellent in a weighed bottle, place it on the bottom of a wide-mouth glass bottle, put the lid on the bottle, and leave it in a thermostatic chamber at about 25-30℃ for 2-3 hours, then open the lid and quickly remove the bottle. Nakani 40
Hang a basket containing 10 day-old burr larvae and standard wool cloth. Immediately cover it with a lid and leave it in a constant temperature and humidity chamber at 30°C and 65% humidity for 5 days, then remove the wool and measure the amount of feeding damage. For comparison, naphthalene alone and succinic acid alone were also measured at the same time. The test was repeated three times, and the average value of the amount of feeding damage was calculated. The results are shown in Table 1.

[Table] Example 2 A repellent was prepared by thoroughly mixing 1 g of succinic acid crystals and 10 g of naphthalene. Take 1 g of this repellent and place it at the bottom of a wide-mouthed glass bottle, and above it hang a basket containing 10 burr larvae with an average weight of 3.3 mg each. Next, the wide-mouth bottle was sealed and left in a constant temperature and humidity chamber at 30°C and 65% humidity for 5 days, after which the basket was removed and the number of dead insects was counted. For comparison, naphthalene alone and succinic acid alone were also tested at the same time. The test was repeated three times and the average values are shown in Table 2.

[Table] Example 3 A repellent was prepared by mixing 1 g of succinic acid crystals and 20 g of camphor. The results of measuring the amount of feeding damage in the same manner as in Example 1 are shown together with the results of measurements of camphor alone, a mixture of fumaric acid and camphor, and a mixture of glutaric acid and camphor, which were simultaneously carried out for comparison. Shown in 2.

【table】

Claims (1)

[Claims] 1. A textile pest repellent containing a combination of naphthalene or camphor and succinic acid as an active ingredient. 2. The textile pest repellent according to claim 1, wherein the ratio of naphthalene or camphor to succinic acid is in the range of 100:1 to 100:30 by weight.