JPH10176116A - Mothproofing of synthetic resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for mothproofing of a synthetic resin which has high safety and stable efficacy for a long period of time, is free from a lowering in efficacy by thermal decomposition, coloration of the resin, emission of an offensive odor during work, a change in properties and the like of the resin and can exhibit excellent repellent action on harmful insects for a long period of time by milling a mothproofing agent at the time of melt processing of a thermoplastic resin to conduct mothproofing. SOLUTION: A thermoplastic resin having repellent action on harmful insects is obtd. from a mothproofing agent comprising a terpene compd. incorporated in a suitable proportion into a mothproofing agent comprising at least one compd. selected from satd. dialkyl esters of dibasic acids represented by the formula ROOC(CH2 )n COOR (wherein R represents a 1-8C satd. alkyl residue and (n) is an integer of 5 to 18). The content of the terpene compd. is not less than 0.3wt.% based on the resin. Thermoplastic resins usable herein include polyethylene, styrene, polyvinyl, polyamide, polyester, polyether, polycarbonate, and polyurethane resins.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to insect repellent processing of a synthetic resin using a chemical obtained by blending a thermoplastic resin with a dibasic acid saturated dialkyl ester and a terpene compound which are excellent in safety.

[0002]

2. Description of the Related Art With regard to insect pests in homes, the occurrence of sanitary insect pests such as indoor dust mites has become a major problem due to the westernization of life and the spread of heating equipment. The most common and simplest method of controlling pests that infest parasites on rugs, such as beddings such as futons and blankets, as well as carpets and tatami mats, is to use insect repellents on rugs inhabited by pests. In addition, a method of directly spraying and applying to bedding, and a paper or sheet treated with a chemical are laid underneath to control and eliminate the propagation. However, drugs used as insect repellents have a problem in safety. Recently, due to the progress of chemistry, efforts have been made to reduce harm as much as possible while enhancing the efficacy of insect repellents. However, at the beginning of the development of insect repellents, the insect repellent effect was given priority, so that insect repellents having some harmful effects were widely used in homes.

When used at home as an insect repellent,
(1) Since the effect often disappears in a short period of time, it is necessary to repeat the processing. (2) Bad odor or pungent odor may be generated during treatment or use. (3) Since the effect of the drug is low, a large amount of the drug is required. (4) Drugs cannot be processed for those that come into direct contact with the human body or animals. (5) Since there is often concern about the harmfulness of drugs, general households cannot process and process the drugs. (6) The method of post-processing chemicals has a problem that the treated chemicals easily fall off during use, washing with water, washing, etc., and the effect is lost.

Further, organic compounds such as organic phosphoric acid compounds and dialkyl phthalates, and inorganic boron compounds such as orthoboric acid, sodium borate and sodium octaborate tetrahydrate have also been used as insect repellents and miticides. In addition, a method of spraying these compounds as powders or supporting them on a processed resin surface has also been adopted. However, in such a method, since the insect repellent used is highly harmful, there is a concern that a large amount of treatment may adversely affect the human body. On the other hand, inorganic boron compounds have low toxicity but are water-soluble, and thus have the disadvantage that their efficacy is lost in a short period of time.

[0005] Since the surface treatment of insect repellents is common for resin products, the insect repellent used for the processing is reduced in effectiveness due to oxidation by air or the influence of ultraviolet rays, or surface friction during use. For a long period of time, stable insect repellent effect cannot be maintained due to the dropping of the drug due to washing or washing. As a method of improvement, a method of directly kneading the resin has been studied.

However, problems of the method of adding an insect repellent during the heating and melting of a thermoplastic resin include, for example, a reduction in efficacy due to thermal decomposition, coloring of the resin, generation of a bad smell during operation, change in physical properties of the resin, and the like. . In particular, when the melting temperature is 200 ° C. or higher, the insect repellent is also susceptible to the influence.

[0007] Regarding the treatment of insect repellents, see Japanese Unexamined Patent Publication No.
There is also a carpet that has been subjected to insect repellent treatment as disclosed in Japanese Patent Application Laid-Open No. 271023/1990, and an insect repellent bedding in which borate glass powder is dispersed as disclosed in Japanese Patent Application Laid-Open No. 5-320015. However, the former is compounded in a binder,
This is a method in which a pile portion of a carpet is immersed to obtain an insect repellent effect, and the latter is a method in which powder is contained in resin fibers and drawn to obtain insect repellent fibers. You can only get a low one.

[0008]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the object of the present invention is not to carry out post-processing, but to knead and mix an insect repellent component into a molding resin to ensure safe use and washing. In this method, the insect repellent performance is not deteriorated and a long-term insect repellent effect is obtained.

[0009]

The present invention comprises a synthetic resin containing a terpene and an insecticide comprising a dibasic acid saturated alkyl ester represented by the following general formula [1] in an amount of 1 to 50% by weight in terms of terpene. Insect-resistant synthetic resin molded product, characterized by the following: RCOO (CH ₂ ) nCOOR [1] (wherein, R is a saturated alkyl group having 1 to 8 carbon atoms, and n is 5 to 5)
Indicates an integer of 18)

As a result of examining the application of dialkyl dibasic acid ester derivatives, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, corkic acid, azelaic acid, sebacic acid, nonanedicarboxylic acid, The effect was observed in dibasic acid dialkyl esters such as undecanedicarboxylic acid. The above insect repellent is mixed with a synthetic resin, and the terpene in the synthetic resin is 0.3% by weight based on the synthetic resin (hereinafter, referred to as a
% Of the synthetic resin).

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The base material of the insect-proof synthetic resin of the present invention is polyethylene resin, styrene resin, polyvinyl resin, polyamide resin, polyester resin,
It is a resin having thermoplasticity such as polyether resin, polycarbonate resin and polyurethane resin, but may be a single resin or a mixed resin.

The compounding amount of the insect repellent is 1 to 50%, preferably 1.5 to 7.0% by terpene in the synthetic resin. If the terpene content is less than 1.0%, the pest control effect may be insufficient, and if it exceeds 10.0%, inconvenience may occur during molding of the resin. The form of the resin can be a fibrous, film-like, cotton-like or molded article having a certain form.

The compounding method is performed in the process of melting the synthetic resin, but the compounding method is not particularly limited.
A high concentration of insect repellent may be added in advance to the synthetic resin to be used as a masterbatch polymer, and the insect repellent may be diluted with a synthetic resin without addition to a predetermined amount.
In addition, synthetic resins include heat stabilizers, weathering stabilizers, lubricants,
Additives such as dyes, pigments, antibacterial agents, ultraviolet absorbers, antioxidants, antistatic agents, flame retardants, deodorants, flavors, and inorganic fillers may be appropriately blended.

[0014]

EXAMPLES Hereinafter, the present invention will be described specifically with reference to Examples, but the present invention is not limited to these Examples. The test method in the examples was based on the following method.

(Example 1) (A) Insect repellent used in experiment: 2 parts of pinene / dipentene copolymer dibutyl sebacate (trade name: DBS, product of Daihachi Chemical Industry Co., Ltd.) 1 part (B) In experiment Synthetic resin used PP (Mitsui Noprene JHH-G) Ny (Kanebo nylon MC112) PET (Teijin polyester TR-8550) (C) Method of preparing resin containing insect repellent A 1% insect repellent was mixed with the resin used, and then a film was prepared. It was created. (D) Method for producing resin film containing insect repellent (1) Polypropylene [trade name: Mitsui Noprene JHH
-G] at a heating temperature of 210 to 230 [deg.] C., 1.0% of the insect repellent of the present invention was added and kneaded, and then used as a film having a thickness of 30 [mu] m by a Labo Plastomill in experiments. (2) 6 nylon [Product name: Kanebo nylon MC11
2) at a heating temperature of 230 to 250 ° C., 1.0% of the insect repellent of the present invention was added and kneaded, and the mixture was extruded with a Labo Plastomill [Toyo Seiki Seisakusho] extruded film production tester to a thickness of 30 μm. The film was used for the experiment. (3) Polyester [Product name: Teijin Polyester T
R-8550] at a heating temperature of 260 to 280 ° C.
After adding 1.0% of the insect repellent of the present invention and kneading, a film having a thickness of 30 μm was used in the experiment by Labo Plastmill.

(Method for Evaluating Mite Prevention Performance) A sample film cut out to a diameter of 4 cm was laid on a plastic petri dish having a diameter of 4 cm and a height of 0.6 cm. Put. This is placed in the center of a plastic petri dish having a diameter of 9 cm and a height of 1.5 cm. Between these large and small petri dishes, about 3,000 well-propagated tick culture media are introduced as the number of viable mites and uniformly spread. Place this on an adhesive sheet, 27 x 13 x 9c
m, put the adhesive sheet together with the adhesive sheet in a plastic container for storing food, put saturated saline solution, cover the container, and reduce the humidity in the container to about 75.
%, Stored in a thermostat at 25 ± 1 ° C. and bred for one day and night, and the mite was collected from the feed by a water jet method, and then the tick repelling rate was calculated by the following formula. The test was repeated three times in consideration of variations. In addition,
Dermatophagoides pteronyssinus was used for the experiment. Tick repellent rate (%) = (1-number of mites in treated area / number of mites in control area) x 100

Water jet method A sample is spread on a 30-mesh sieve having a diameter of 18 cm,
Place a vat of the same diameter (capacity: about 5 liters) underneath, and spray water vigorously onto the sample with a shower. By this operation, the mites attached to the sample are washed out and fall into the lower bat. When the vat is full, suction filter all the water in the vat. Repeat this operation until no mites are seen.
Repeat three times. In addition, the repellent rate which can be said to be mite-proof is 70% or more.

Repellency test of insecticide-containing resin film against Dermatophagoides pteronyssinus Using insect-controlling agent-containing resin film (1)

A mite repellent test was conducted by the intrusion prevention method. Using this test result and the resin film (2) containing the insect repellent, a mite repellent test was conducted by the intrusion prevention method. A mite repellent test was conducted by the intrusion prevention method using the insecticide-containing resin film (3). Table 1 shows the test results.

[0020]

[Table 1]

[0021]

The following general formula (1): ROOC (CH ₂ ) nCOOR (1) wherein R is an alkyl residue having 1 to 8 carbon atoms, and n is 5 to 1
Represents an integer of 8. Insect repellent processing of a synthetic resin comprising an insect repellent obtained by mixing a terpene compound with one or more insect repellents selected from dialkyl dibasic acid esters represented by the formula (1) and a thermoplastic resin. According to the method, the added amount is 1 to 50.0% in terms of terpene amount.
Preferably, 1.0 to 7.5% is kneaded when the thermoplastic resin is melted, and then molded to obtain a molded resin product having excellent insect repellency against long-term pests. The terpene compound in the synthetic resin molded product contains 0.3% or more of the entire resin.

[Brief description of the drawings]

FIG. 1 is a layout diagram of a petri dish used in an intrusion prevention method in a mite repellent test according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 Petri dish (diameter 9 cm) 2 Petri dish (diameter 4 cm) 3 Test specimen 4 Tick culture medium 5 Powder feed 6 Adhesive sheet

Continued on the front page (51) Int.Cl. ⁶ Identification code FI C08K 5/01 C08K 5/01 5/11 5/11

Claims (4)

[Claims] 1. The following general formula (1): ROOC (CH ₂ ) nCOOR (1) wherein R is a saturated alkyl residue having 1 to 8 carbon atoms, and n is 5
Represents an integer of ~ 18. Insect repellent processing of a synthetic resin characterized by comprising a thermoplastic resin and an insect repellent obtained by blending a terpene compound with one or more insect repellents selected from dibasic acid saturated dialkyl esters represented by the formula (1): . 2. The synthetic resin according to claim 1, wherein the synthetic resin contains 1 to 50% by weight of a terpene compound of a repellent, which is a terpene or a dibasic acid saturated alkyl ester represented by the general formula [1]. Insect repellent processing. 3. A terpene compound contained in the synthetic resin molded article constituted by using the insect-proof thermoplastic synthetic resin according to claim 1 or 2 in an amount of 0.3% by weight or more based on the whole resin. Insect repellent processing of synthetic resin. 4. The thermoplastic resin is a polyethylene resin, a styrene resin, a polyvinyl resin, a polyamide resin,
The insect repellent treatment of the synthetic resin according to claim 1, which is a polyester resin, a polyether resin, a polycarbonate resin, or a polyurethane resin.