JPH10101503A - Insect proof material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an insect proof material which can not only effectively prevent damage of crops by insects, but also have repelling effect on insects in orchard or farm area. SOLUTION: This insect proof material comprises a polyolefin composition containing an amine compound represented by the formula R<1> -N[(CH2 CH2 O)n R<2> ]2 or an amide compound represented by the formula R<4> -CO-N[(CH2 CH2 O)n R<5> ]2 [R<1> and R<4> are each 5-22C alkyl group, alkenyl group, alkadienyl group, alkatrienyl group or alkynyl group; (m) and (n) are each an integer of 1-3; R<2> and R<5> are H or COR<3> (R<3> is 5-22C alkyl group, alkenyl group, alkadienyl group, alkatrienyl group or alkynyl group) in an amount of 0.1-10wt.% and is preferably formed into a bag for culturing fruits.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention provides an insect repellent material which not only can effectively prevent insect damage to crops in an orchard or a farm, but also has an effect of repelling insects in the orchard and the farm area.

[0002]

2. Description of the Related Art In orchards or farms, insecticides are generally sprayed over the entire area to prevent insect damage to crops.

[0003] Spraying of pesticides must be carried out regularly at the time of planting, at the time of growing, at the time of harvesting, etc., so that much trouble has been taken. In addition, since pesticides come into direct contact with plants and soil, the problem of residual chemicals in crops has recently been pointed out.

[0004] Therefore, it is necessary to minimize the use of insecticides. For agricultural products such as fruits, a method of cultivating them by covering them with cultivation bags so that insects are not physically attached thereto is used. Has been taken. However, such a method of covering crops with bags cannot prevent the insects from being attracted to the surroundings, and only the fruits and the like covered with the bags can be protected from insect damage.

Under these circumstances, various insect repellent materials having an effect of repelling insects have recently been proposed. For example, Japanese Unexamined Patent Publication (Kokai) No. 6-205519 discloses a resin material having an insect repellent effect in which glycerol monostearate is mixed in a resin.

[0006]

The resin material containing glycerol monostearate mixed therein has a good insect repellent effect, and it is desired to develop an insect repellent material having an enhanced repellent effect. Was rare.

[0007]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that a polyolefin composition having a specific composition has an excellent insect repellent effect. It was completed.

That is, the present invention is an insect repellent comprising a polyolefin composition containing 0.1 to 10% by weight of an amine compound represented by the following formula (1) or an amide compound represented by the following formula (2).

R ¹ -N [(CH ₂ CH ₂ O) _n R ² ] ₂ (1) R ⁴ -CO-N [(CH ₂ CH ₂ O) _m R ⁵ ] ₂ (2) (where R ¹ , R ⁴ represents an alkyl group having 5 to 22 carbon atoms, an alkenyl group, an alkadienyl group, an alkatrienyl group,
Represents an alkynyl group, n and m represent an integer of 1 to 3,
^2, R ⁵ is H or COR ³ (R ³ represents. Alkyl group of 5-22 carbon atoms, an alkenyl group, alkadienyl group, alkatrienyl group, an alkynyl group). )

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The amine compound used in the present invention is
In formula (1), R ^{1 having} a carbon number of 5 to 22 is used.
Are preferred. If the number of carbon atoms is too small, the film tends to block when used as a film described below. On the other hand, if the carbon number is too large, the insect repellent effect and the antifogging property described below will be insufficient. Also, R ³
Is a compound having 5 to 22 carbon atoms. For the same reason as above, a compound having 11 to 17 carbon atoms is preferable.

In the formula (1), n is from 1 to 3, and n = 1 is the most excellent.

These amine compounds have both antifogging property and antistatic property. In order to exhibit particularly excellent insect repellent effect and antifogging property, lauryl diethanolamine, myristyl diethanolamine, palmityl diethanolamine, stearyl diethanolamine, oleyl diethanolamine, stearyl diethanolamine monostearate, stearyl diethanolamine distearate, stearyl diethanolamine monomyristate It is preferable to use stearyl diethanolamine monopalmitate, palmityl diethanolamine monopalmitate, and the like, and a mixture thereof.

As the amide compound used in the present invention, those having 5 to 22 carbon atoms of R ⁴ in the formula (2) are used. In order to obtain more preferable results, 11 to 17 compounds are preferable. . If the number of carbon atoms is too small, the film tends to block when used as a film. When the carbon number is too large, the insect repellent effect and the antifogging property are insufficient. As R ³ , one having 5 to 22 carbon atoms is used. For the same reason as above, R ³ has 11 to 1 carbon atoms.
Seven are preferred.

In the formula (2), m of 1 to 3 is used, and m = 1 is most excellent.

These amide compounds also have antifogging properties and antistatic properties. Particularly excellent insect repellent effect, and in order to exhibit antifogging properties, lauric acid diethanolamide, myristic acid diethanolamide, palmitic acid diethanolamide, stearic acid diethanolamide,
It is preferable to use oleic acid diethanolamide, stearic acid diethanolamide monostearate, and the like, and a mixture thereof.

When used as a bag for cultivating fruits described later, the amine compound represented by the formula (1) is more excellent in antifogging property than the amide compound represented by the formula (2).

Here, if the same amine compound or amide compound does not have the structure represented by the above formula (1) or (2), an excellent insect repellent effect as in the present invention cannot be obtained. These amine compounds and amide compounds are compounds having anti-fogging properties as described above, but even compounds having the same anti-fogging properties are fatty acid esters of polyhydric alcohols generally used as anti-fogging agents, for example, glycerin fatty acids. Esters, sorbitan fatty acid esters, pentaerythritol fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyethylene glycol fatty acid esters, polyglycerin fatty acid esters, etc., have excellent antifogging properties, but have insufficient insect repellent and repellent effects.

The concentration of the amine compound or the amide compound is 0.1 to 10% by weight in the polyolefin composition. When used as a rod-shaped or plate-shaped molded body, a rope, or a net described below, the content is preferably 1 to 7% by weight. If the amount is less than 0.1% by weight, a sufficient insect repellent effect cannot be exhibited.
If the content is more than 0% by weight, molding becomes difficult, and the strength is insufficient.

Further, when used as a film, it is preferable to use 0.1.
2-3% by weight is preferred. If it is less than 0.1% by weight, the insect repellent effect and antifogging property are insufficient, and if it is more than 10% by weight, molding becomes difficult and the film is easily blocked.

The polyolefin used in the present invention is not particularly limited, and a known one can be used. For example, ethylene, propylene, 1-butene, 1-pentene, 1-hexene,
A homopolymer of an α-olefin such as 4-methyl-1-pentene, a copolymer of the above α-olefins,
Copolymers of monomers other than α-olefins copolymerizable with olefins and α-olefins, and mixtures thereof, and the like. As the monomer other than the above α-olefin,
Examples thereof include vinyl acetate, maleic acid, vinyl alcohol, methacrylic acid, methyl methacrylate, and ethyl methacrylate.

Among these polyolefins, polypropylene, polyethylene, propylene-ethylene copolymer, propylene-1-butene copolymer and ethylene-propylene-1-butene copolymer are preferred in view of chemical stability.

The insect-controlling material of the present invention is used by kneading the above-mentioned amine compound or amide compound into polyolefin and processing it into a certain form. The form of processing and the method of use are not particularly limited, but generally, rods, plate-like molded articles, ropes, nets, films, bags and the like can be suitably used.

When the insect-controlling material of the present invention is used as a rod-shaped or plate-shaped molded product, the above-mentioned amine compound or amide compound is kneaded into a polyolefin, and is subjected to injection molding, extrusion molding, calender molding or the like to form a plate, sheet, or sheet. It is formed into a shape such as a pile. By spreading or hanging the molded article around a farm or orchard, or by driving a pile-shaped molded article, an insect repellent effect and an insect repellent effect can be obtained.

When the insect-controlling material of the present invention is used as a rope or a net, the above-mentioned amine or amide is kneaded into a polyolefin and formed into a yarn by inflation uniaxial drawing, or into a fiber by a monofilament molding method. How to make a rope. Alternatively, a method of processing these into a net or forming a net directly using a netron method is used. The rope or net obtained by these methods is stretched around a farm or orchard, or by covering the whole, to obtain an insect repellent effect and an insect repellent effect on the whole farm or orchard.

When the insect repellent material of the present invention is used as a film, the above-mentioned amine compound or amide compound is kneaded into a polyolefin and extruded to form a uniaxially or biaxially stretched film, a cast film, or a blown film. By spreading the obtained film around a farm or orchard or covering the whole, an insect repellent effect on the whole farm or orchard,
An effect of repelling pests can be obtained.

When the insect repellent material of the present invention is used as a bag for cultivating fruits, the polyolefin into which the above-mentioned amine compound or amide compound has been kneaded is processed into a cast film or a biaxially stretched film, and then subjected to fusing sealing or heat sealing. A bag is used as a bag, or a bag is formed by an inflation film forming method, and a method of covering the immature fruit in an orchard is used.

The bag for cultivating fruits used in this way has not only an insect repellent effect on fruits, but also an insect repellent effect on the whole orchard. In addition, since the bag is transparent, the ripening state of the fruit can be easily observed, and since it has anti-fogging properties, the inner and outer surfaces of the bag are exposed to water droplets condensing on the bag due to moisture generated from the fruit and changes in outside air humidity. Can be prevented from fogging.

The film used for the bag for growing fruit of the present invention may be a single layer or a multilayer. Polyolefin in the case of a single layer, among the polyolefins described above,
It is common to use a homopolypropylene or propylene-α-olefin copolymer having good transparency and film rigidity.

As a typical example of a multi-layer structure, the base layer is made of the above-mentioned homopolypropylene or propylene-α-olefin copolymer or a mixture thereof, and the surface layer is made of a sealing material or a protective film. A layer made of a resin having excellent cloudiness, for example, polyethylene, propylene-ethylene copolymer, ethylene-1-butene copolymer, ethylene-
An embodiment in which a layer made of a propylene-1-butene copolymer, a blend containing these polyolefins as a main component, or the like is laminated on one side or both sides is given. At this time, the amine compound or the amide compound may be contained in either the base material layer or the surface layer, or may be contained in both, but the content of the whole film must be within the above range.

In the present invention, the film forming the bag for cultivating fruits is selected to have a thickness of 10 to 60 μm depending on the use. In the case of a multilayer structure, the thickness of the surface layer is preferably 30% or less, more preferably 20% or less of the core layer, in terms of transparency and film rigidity.

Further, by providing pores in the fruit cultivation bag of the present invention, the antifogging property and the insect repelling effect can be further improved. Considering the size of the pest and the respiration of the fruit, the size of the pores is 0.1-2 mm in diameter, 5000-5
00000 pieces / m ² , preferably 0.2 to 1 mm in diameter,
It is 10,000 to 200,000 pieces / m ² .

The method for producing a film for forming a fruit-growing bag of the present invention is not particularly limited as long as it is the above-mentioned method. A resin obtained by mixing an amine compound or an amide compound with a polyolefin is melted and extruded from a T-die. A method in which one or both sides are corona-discharged after forming a cast film. Further, a method of biaxially stretching the resin extruded from the T-die and subjecting one or both surfaces to a corona discharge treatment is used.

In the case of a laminated film, a method of coextruding a surface layer resin and a substrate layer resin, a method of laminating a surface layer resin on a substrate layer, and the like are used.

Although corona discharge treatment is not always necessary, it is advantageous for exhibiting better antifogging properties.
Corona discharge treatment density varies depending on the resin used,
Generally, it is 10 to 50 W · min / m ² .

It is preferable that the film is biaxially stretched in terms of film rigidity, transparency, and surface gloss. The stretching ratio is generally 3 to 6 times in the machine direction (MD) of the film and 7 to 12 times in the direction perpendicular to the direction (TD).

A lubricant, an anti-blocking agent and the like can be added to the bag for cultivating fruit used in the present invention, if necessary. In addition, by printing on the upper part of the bag, fruits and the like which are easily tanned by direct sunlight can be uniformly matured.

[0037]

As described above, the insect-controlling material of the present invention is as follows.
By using a polyolefin composition having a specific composition, not only can insect pests in an orchard or a farm be effectively prevented, but also a repellent effect against insects in the orchard and farm areas can be exhibited. It is considered that the amine compound and the amide compound used in the present invention have an excellent insect repellent effect and an insect repellent effect.

When the insect repellent material of the present invention is used as a bag for cultivating fruits, it has an insect repellent effect, a repellent effect and an anti-fogging effect which cannot be obtained with conventional cultivation bags, so that the growth state of the fruit is reduced. It can be grown very effectively while observing.

Since the insect repellent material of the present invention has the above-mentioned properties, it can effectively prevent insect damage to crops and damage from crossing during the pollination of fruits in orchards or farms. Exhibits a repellent effect on insects in the area. In particular, mosquitoes, dirt mosquitoes, moths, turtles, bugs, and their larvae are unlikely to occur. In addition, the pests can be used as useful insect repellent materials, for example, workers who work in the farm can work without wearing insect repellent clothes and equipment, because the work is not hindered by pests.

[0040]

EXAMPLES The present invention will be described below with reference to examples and comparative examples, but the present invention is not limited to these examples.

The evaluation method used in the following examples will be described.

(1) Insecticidal effect of turtle insects on pears 5: No insects donated to bags.

4: Little insects donated to the bag.

3: Some insects donate to the bag.

2: The insects donate to the bag.

1: Insects donate considerably to the bag.

(2) Repellent effect of turtle insects in the farm or orchard area 5: No insects donate to the area.

4: Little insects donated to the area.

3: Some insects donate to the area.

2: Insects donate to the area, but have some repelling effects.

1: A considerable number of insects have come to the area and have no repellent effect.

(3) Anti-fogging effect of bag for cultivating fruit 5: There is no fogging in the bag, and the state of fruit can be well observed.

4: The bag is slightly cloudy, but the fruit condition can be observed well.

3: The bag is cloudy, but the state of the fruit can be observed.

2: The bag is cloudy and the fruit condition cannot be observed well.

1: The bag is cloudy and the state of the fruit cannot be observed at all.

Example 1 Stearyl diethanolamine monostearate (1% by weight) was added to homopolypropylene (MI = 2), and the mixture was melt-kneaded to obtain a resin for the base layer. On the other hand, a propylene-ethylene random copolymer having an ethylene content of 6 mol% was used as a resin for the surface layer, and two sides of a 20 μm base material layer were formed on both surfaces using a tenter biaxial stretching apparatus and an in-line laminating apparatus.
A biaxially stretched film having a surface layer of μm was laminated. In addition,
The stretching ratio was 4.5 times for MD and 10 times for TD, and both surfaces of the film were subjected to a corona discharge treatment of 30 W · min / m ² . This film was cut into 20cm × 3
0cm bag, and a hole with a diameter of 0.5mm
It was emptied at a rate of 00 pieces / m ² to obtain a bag for growing fruits.

The fruit cultivation bag thus obtained is
All pears in the 00m ² pear garden were attached using a string. The antifogging effect of the fruit cultivation bag, the insect repellent effect on pears, and the repellent effect of the whole orchard were observed, and the results are shown in Table 1.

Example 2 The procedure of Example 1 was repeated, except that 0.3% by weight of stearyldiethanolamine was added as an amine compound. The results are shown in Table 1.

Example 3 The procedure of Example 1 was repeated, except that 2% by weight of myristyldiethanolamine monopalmitate was added as an amine compound. The results are shown in Table 1.

Example 4 Example 1 was repeated except that 1% by weight of stearic acid ethanolamide was added as an amide compound instead of the amine compound.
The same was done. The results are shown in Table 1.

Example 5 The procedure of Example 1 was repeated except that 0.5% by weight of myristic acid diethanolamide was added as an amide compound instead of the amine compound. The results are shown in Table 1.

Example 6 The procedure of Example 1 was repeated, except that 0.2% by weight of stearyldiethanolamine and 1% by weight of lauric acid diethanolamide were added. The results are shown in Table 1.

Example 7 The same procedure as in Example 1 was carried out except that a hole was not made in the bag for growing fruits.

Table 1 shows the results.

COMPARATIVE EXAMPLE 1 Nothing was applied to the pear garden of 100 m ² pears, and the insect repellent effect on pears and the repellent effect of the whole orchard were observed. The results are shown in Table 1.

Comparative Example 2 The same procedure as in Example 1 was carried out except that no amine compound was added.

Table 1 shows the results.

Comparative Example 3 The procedure of Example 1 was repeated, except that 1% by weight of glycerin monostearate was added instead of the amine compound. The results are shown in Table 1.

Comparative Example 4 The procedure of Example 1 was repeated except that 1% by weight of sorbitan monopalmitate was used instead of the amine compound. The results are shown in Table 1.

Comparative Example 5 1% by weight of stearic acid amide was used instead of the amine compound.
The same procedure as in Example 1 was carried out except for the addition. The results are shown in Table 1.

Comparative Example 6 Stearyl diethanolamine monostearate was added to 12
The same procedure as in Example 1 was carried out except that the amount was changed to% by weight, but the film was blocked and could not be molded into a fruit growing bag.

[0073]

[Table 1]

Continued on the front page (51) Int.Cl. ⁶ Identification code FI B29D 22/00 B29D 22/00 C08K 5/17 C08K 5/17 5/20 5/20 C08L 23/02 C08L 23/02 // (A01N 37 / 20 33:04) B29K 23:00

Claims (2)

[Claims] 1. An amine compound represented by the following formula (1) or an amide compound represented by the following formula (2):
An insect repellent comprising a polyolefin composition containing 0% by weight. R ¹ -N [(CH ₂ CH ₂ O) _n R ² ] ₂ (1) R ⁴ -CO-N [(CH ₂ CH ₂ O) _m R ⁵ ] ₂ (2) (where R ¹ and R ⁴ Is an alkyl group having 5 to 22 carbon atoms, an alkenyl group, an alkadienyl group, an alkatrienyl group,
Represents an alkynyl group, n and m represent an integer of 1 to 3,
^2, R ⁵ is H or COR ³ (R ³ represents. Alkyl group of 5-22 carbon atoms, an alkenyl group, alkadienyl group, alkatrienyl group, an alkynyl group). ) 2. A bag for cultivating fruit, which is formed by bagging a film comprising the polyolefin composition according to claim 1.