Resin for repelling insects, fiber for repelling insects, and processed product thereof

Abstract

To provide means for achieving contact repellency against harmful insects through the use of icaridin or DEET, rather than pyrethroids as insecticides, with the aim of maximizing their repellency effects.SOLUTION: There is provided a resin for repelling insects, comprising a resin selected from Group A, a nonionic surfactant selected from Group B, an insect repellent component selected from Group C, and a cyclic saccharide. Group A: polyalkylene resin, polyester resin, polyamide resin, alkyd resin. Group B: sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyethylene glycol monoalkyl ester, polyglyceryl fatty acid ester. Group C: icaridin, DEET, lemon oil, eucalyptus oil.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an insect-repellent resin, an insect-repellent fiber, and a processed product thereof. In the present invention, "insect repellent" refers to the effect of preventing contact with blood-sucking insects such as mosquitoes and mites, and unpleasant and unsanitary insects such as cockroaches. [Background technology]

[0002] Contact with blood-sucking insects such as mosquitoes and ticks, and unpleasant and unsanitary insects such as cockroaches can cause the spread of infectious diseases such as mosquito-borne malaria and yellow fever, and the infection of viruses that cause deadly high fevers by ticks, and contact with unpleasant and unsanitary animals such as cockroaches can also cause microbial contamination. Under these circumstances, various resins containing pyrethroids have been developed for blood-sucking insects, and various drug release control means have also been developed. However, there are many difficulties in kneading low-temperature decomposable pyrethroids into resins with high melting points, and it must be said that the range of application is narrow (see, for example, Patent Documents 1 to 6). In addition, it is known that the effect of pyrethroids in these products is to suppress blood-sucking by repellency rather than insecticidal effect (https: / / tanatiku.com / kazuma / 1024).

[0003] Under these circumstances, we considered how to make the most of the repellent effect, and came up with the idea of ​​using icaridin or DEET instead of pyrethroid insecticides to repel mosquitoes by contact. However, although there are technologies to support these repellent ingredients in low-melting polymers and diffuse them into the surrounding area, or to apply them directly to the skin (see, for example, Patent Documents 7 and 8), there has been no attempt to incorporate them into polymers, process them into threads, or apply them to mosquito nets or clothing. This is due to the difficulty of incorporating them, as mentioned above.

[0004] It has been attempted to administer such compounds to the human body as vesicles containing cyclodextrin or the like in a polymer, but it has not been applied to everyday items such as clothing or mosquito nets (see, for example, Patent Document 9).

[0005] On the other hand, no resin for insect repellency characterized by containing a resin selected from Group A, a nonionic surfactant selected from Group B, an insect repellent component selected from Group C, and a cyclic sugar was known at all. Group A: Polyalkylene resins, polyester resins, polyamide resins, alkyd resins Group B: Sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyethylene glycol monoalkyl esters, polyglycerin fatty acid esters Group C: Icaridin, DEET, lemon oil, eucalyptus oil [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2012-001533 A [Patent Document 2] JP 2011-127020 A [Patent Document 3] JP 2015-063494 A [Patent Document 4] Japanese Patent Application Publication No. 08-245324 [Patent Document 5] JP 2002-255702 A [Patent Document 6] JP 2023-35859 A [Patent Document 7] Special table 2014-523446 publication [Patent Document 8] JP 2007-039342 A [Patent Document 9] Special Publication No. 2002-531530 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention was made under such circumstances, and our objective is to provide a means for maximizing the repellent effect by using icaridin or DEET instead of pyrethroid insecticides, and for repelling harmful insects through contact with them. [Means for solving the problem]

[0008] In view of this situation, the present inventors have made extensive research efforts in search of a means of using icaridin or DEET, rather than pyrethroid insecticides, to repel harmful insects through contact, and as a result have found that an insect repellent resin containing a resin selected from Group A, a nonionic surfactant selected from Group B, an insect repellent component selected from Group C, and a cyclic sugar has such properties, leading to the completion of the invention. That is, the present invention is as shown below. Group A: Polyalkylene resins, polyester resins, polyamide resins, alkyd resins Group B: Sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyethylene glycol monoalkyl esters, polyglycerin fatty acid esters Group C: Icaridin, DEET, lemon oil, eucalyptus oil <1> An insect repellent resin comprising a resin selected from Group A, a nonionic surfactant selected from Group B, an insect repellent component selected from Group C, and a cyclic sugar. Group A: Polyalkylene resins, polyester resins, polyamide resins, alkyd resins Group B: Sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyethylene glycol monoalkyl esters, polyglycerin fatty acid esters Group C: Icaridin, DEET, lemon oil, eucalyptus oil <2> The antibacterial repellent component selected from group C is icaridin. <1> 2. The insect repellent resin according to claim 1 . <3> the cyclic sugar is beta cyclodextrin; <1> or <2> A resin for decontamination as described above. <4> Characterized by having a micelle structure in the resin <1> ~ <3> 13. The resin according to any one of claims 1 to 12. <5> <1> ~ <4> A processed product obtained by processing the insect repellent resin described in any one of claims 1 to 4. <6> Characterized in that it is a yarn, <5> The processed product described in. Effect of the Invention

[0009] According to the present invention, we have considered making the most of the repellent effect, and have been able to provide a means of maximizing the repellent effect by utilizing icaridin or DEET instead of pyrethroid insecticides, thereby providing a means of repelling harmful insects through contact. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a micrograph of Example 1 (a drawing substitute photograph). [Diagram 2] FIG. 1 is a diagram showing an FTIR spectrum of Example 2 (a photograph substituting a drawing). [Diagram 3] FIG. 1 is a micrograph of Example 3 (a drawing substitute photograph). [Figure 4] FIG. 1 is a micrograph of Example 4 (a drawing substitute photograph). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The present invention is a resin for insect repellency, characterized by containing a resin selected from Group A, a nonionic surfactant selected from Group B, an insect repellent component selected from Group C, and a cyclic sugar. Group A: Polyalkylene resins, polyester resins, polyamide resins, alkyd resins Group B: Sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyethylene glycol monoalkyl esters, polyglycerin fatty acid esters Group C: Icaridin, DEET, lemon oil, eucalyptus oil

[0012] The resin is preferably a thermoplastic resin, and examples thereof include polyalkylene resins such as polyethylene and polypropylene, polyester resins such as polyethylene terephthalate, polyamide resins such as nylon, and alkyd resins, and polyethylene may be either high density or low density. It is preferable to use only one type of such resin, and its content in the decontamination agent of the present invention is preferably 60 to 99.997 mass% of the total amount, more preferably 65 to 99.996 mass%. In particular, in the present invention, it is preferable to select polyester or polyamide as the resin, since it has the effect of stably containing a low melting point compound in a high melting point polymer.

[0013] In the nonionic surfactant selected from sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyethylene glycol monoalkyl ester, and polyglycerin fatty acid ester, the fatty acid residue is preferably exemplified by behenic acid residue, stearic acid residue, myristic acid residue, lauric acid residue, oleic acid residue, isooctanoic acid residue, and the like, and particularly preferably oleic acid residue and lauric acid residue. In addition, particularly preferably exemplified by the alkyl group are stearyl group and lauryl group. Particularly preferably exemplified by the polyoxyethylene group are those having 2 to 6 oxyethylene groups. Particularly preferably exemplified by the polyglyceryl group are decaglyceryl group, octaglyceryl group, and hexaglyceryl group. Only one of these nonionic surfactants may be contained, or two or more of them may be contained in combination. The preferred amount of these is preferably 0.1 to 4 mass% based on the total amount of the polymer, and more preferably 0.002 to 1 mass%, of which the nonionic surfactant is preferably 0.001 to 2 mass%.

[0014] The polymer of the present invention is characterized by containing an insect repellent. As the insect repellent, for example, icaridin, DEET, lemon oil, and eucalyptus oil, which are represented in the above group C, can be preferably exemplified, and all of these can be commercially available. In addition, when used as a master batch, the content can be effectively controlled to a low level of 0.01 to 15 mass%, more preferably 0.1 to 5 mass%, so that the addition of such components can avoid impairing moldability. Since the actual effective amount of these components is 100 to 10,000 ppm, it is preferable that the final pellet obtained by diluting the master batch contains 150 to 15,000 ppm, more preferably 200 to 10,000 ppm.

[0015] The polymer of the present invention is characterized in that it contains a cyclic sugar. As such a cyclic sugar, for example, cyclodextrin is a preferred example, and among them, β-cyclodextrin is a preferred example. Such a cyclic sugar can be contained only one type, or two or more types can be contained in combination. The preferred content of these is preferably 0.01 to 5 mass %, more preferably 0.05 to 3 mass %, in total. Such components, together with the nonionic surfactant selected from the sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyethylene glycol monoalkyl ester, and polyglycerin fatty acid ester, have the effect of making the polymer substrate into a structure in which the repellent can move through the micelle. That is, it is considered that the cyclodextrin becomes the host, and the guest surfactant and the repellent move while exchanging places. And since the guest is lipophilic and the outside of the host is hydrophilic, it is considered that the surfactant can move to the interface that appears as a surfactant and can move. To construct such a structure, the polymer of the present invention has the effect of stably containing the repellent in the high melting point resin, and at the same time, it can keep them in the space for a long time. The continuous release is due to the fact that the drug moves not only from the surface but also from inside the polymer. This stabilization and sustained release is believed to be due to the endothermic reaction of the micelles formed in the polymer and the stability of the micelles themselves.

[0016] In addition to the above components, the resin of the present invention may contain any component that is usually contained in a resin. Preferred examples of such components include ultraviolet absorbers, colorants, antioxidants, plasticizers, and insecticides. The resin of the present invention can be made into a resin for processing by treating the above essential components and any optional components according to a conventional method. For example, a single-screw extruder and a pelletizer are combined, all components are charged into the single-screw extruder, mixed and melted, extruded, cut, and formed into pellets. The obtained pellets can be processed into fibers by melt spinning, or into parts of any shape by blow molding using a mold. It is also possible to produce master pellets, dilute them with resin pellets, and then process them.

[0017] The fiber of the present invention can be produced by spinning the resin, or by twisting the spun fiber. By twisting fibers having different release rates of zeolite, which may be supported by a metal as a decontamination component, it is possible to adjust the release rate and duration of release of the repellent.

[0018] The fibers thus obtained can be processed into nets or cloth by knitting or spinning. Such fibers, nets, and cloth release the components having decontaminating properties continuously and for a long time, and are therefore useful for infectious disease countermeasures, particularly those transmitted by insects. Preferred examples of such processed products include insect repellent sheets, mosquito nets, and clothing that are processed into films to protect fruits from mold.

[0019] The present invention will be described in more detail below with reference to examples. EXAMPLES

[0020] The ingredients were mixed according to the recipe shown below, heated and kneaded at 240°C, and then processed with a pelletizer to obtain the resin pellets of the present invention. The micrograph is shown in Figure 1. The presence of micelles is observed. The content of icaridin was 1.8% by GCMS.

[0021] [Table 1] EXAMPLES

[0022] The pellets prepared in Example 1 were stored at 55°C for one month and then subjected to FTIR measurement. The chart is shown in Figure 2. The peak of icaridin can be confirmed, which shows that the pellets have a retention ability in addition to a release ability. EXAMPLES

[0023] A master batch was prepared according to the following recipe in the same manner as in Example 1. A micrograph is shown in Figure 3. The presence of micelles can be seen.

[0024] [Table 2] EXAMPLES

[0025] A master batch was prepared according to the following recipe in the same manner as in Example 1. A micrograph is shown in Figure 4. The presence of micelles can be seen.

[0026] [Table 3] [Industrial Applicability]

[0027] The present invention has applications in pest repellent and infection prevention products.

Claims

1. An insect repellent resin comprising a resin selected from Group A, a nonionic surfactant selected from Group B, an insect repellent component selected from Group C, and a cyclic sugar. Group A: Polyalkylene resins, polyester resins, polyamide resins, alkyd resins Group B: Sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyethylene glycol monoalkyl esters, polyglycerin fatty acid esters Group C: Icaridin, DEET, lemon oil, eucalyptus oil

2. 2. The insect repellent resin according to claim 1, wherein the antibacterial repellent component selected from group C is icaridin.

3. 3. The decontamination resin of claim 1 or 2, wherein the cyclic sugar is a beta-cyclodextrin.

4. The resin according to any one of claims 1 to 3, which has a micelle structure within the resin.

5. A processed product obtained by processing the insect repellent resin according to any one of claims 1 to 4.

6. 6. The workpiece according to claim 5, characterized in that it is a thread.

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