JPH03145407A - Rodent repellent - Google Patents

Abstract

PURPOSE:To obtain a rodent repellent for a rubber, plastics or wood, etc., having excellent sustaining activity by making a terpenoid having an excellent rodent repellent effect in a low cost to be microcapsuled with wall material and/or contain in porous material. CONSTITUTION:The aimed rodent repellent contains either a terpenoid microcapsuled with a wall material such as urea resin, polyamide or calcium carbonate or a terpenoid contained in a porous material such as porous silica, zeolite or activated charcoal, or the both as active ingredients. As said terpenoid, especially an essential oil containing <=10wt.% volatile component having <=200 deg.C boiling point is preferably mixed. Said rodent repellent may be used in a method such as incorporated in a synthetic polymer, or extrusion or injection molding, or adding in paint. Activity is able to be sustained for a long period of time by microcapsulation or incorporating into a porous material.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to rodent repellents, particularly synthetic or natural organic polymers,
In particular, the present invention relates to a rat-proofing agent that is effective in preventing chewing and eating damage caused by rats to rubber, plastic, wood, and the like.

[Prior art/problems to be solved by the invention] The main damage caused by rats is, for example, chewing and feeding damage (especially,
Machines such as computers going down or malfunctioning); Corrosion or breakage of cables due to nesting, urination, defecation, etc. inside the machine;
Chewing and eating damage to packaging materials, chewing and eating damage to plastic products, etc. are too numerous to mention.

Conventionally, cycloheximide has been used as an effective rodent repellent, but this compound is extremely expensive, and the development of an alternative rodent repellent has been eagerly awaited.

Under these circumstances, the present inventors have conducted various studies and have discovered that terpenoids have extremely effective rodent repellent effects (especially repellent effects against rats). However, the present inventors have discovered that the rodent-repellent activity of the terpenoid rapidly decreases even if the terpenoid is left as is or, for example, in a product formed by kneading it into a resin composition.

Therefore, an object of the present invention is to provide a rodent repellent that is excellent in rodent repellent effect, is inexpensive, and has a long-lasting rodent repellent activity.

[Means to solve the problem]

The above-mentioned object is solved by the present invention, that is, by a rodent repellent containing as an active ingredient at least one selected from terpenoids microencapsulated in a wall material and terpenoids contained in a porous material.

The terpenoids used in the present invention include not only hydrocarbons but also 1141 compounds such as alcohols, ketones, and acids that have a hydrocarbon skeleton, terpenes,
Examples include sesquiterpenes, diterpenes, triterpenes, and the like.

Examples of the terpenoids used in the present invention include the following compounds: chain diterpene compounds and derivatives thereof, represented by

Regarding R in the above formula, examples of lower alkyl include methyl, ethyl, n-propyl, 1so-propyl, n-
Examples include lower alkyl having 1 to 4 carbon atoms such as butyl.

Furthermore, the terpenoids include limonene, camphene, pinene, geraniol, linalool, menthol, cineole, ascaridol, borneol, citral, camphor, hinokitiol, phytol, phytonadione [2methyl-3-(3,7,11,15 −
tetramethyl-2hexadecenyl)-1,4-naphthalenediol], phytonasiol [2-methyl-3-
(3,7゜11,15-tetramethyl-2-hexadeicenyl)-1,4-naphthalenedione], vitamin K (
In particular, vitamin K1% vitamin) etc. are exemplified.

Preferable terpenoids have a boiling point (under 1 atmosphere, the same applies hereinafter) of 200°C or higher, particularly 250°C or higher,
Furthermore, a temperature of 280°C or higher is preferred.The terpenoid may be used alone or as a mixture.The terpenoid is an essential oil component, and in the present invention, it may be used in the form of an essential oil. It is also used as a terpenoid-containing embodiment that also contains other components such as crude extracts from plants (phytoncides). Among the above-mentioned essential oils and crude extracts from plants, those containing volatile components with a boiling point of 200° C. or less of 10% by weight or less, especially 5% by weight or less are preferable.

The terpenoid of the present invention may be either a natural product or a synthetic product.The synthetic product is produced by organic synthesis using a known method. In addition, natural products are extracted from plants of the cypress family (for example, cypress, cypress, cypress, etc.), various shrubs, etc. (particularly water extraction, especially water extraction under reflux heating, alcohol, etc.) It is produced by extraction with 81 solvents such as ketones and ethers.

Microencapsulation of terpenoids is achieved by known means,
For example, it may be carried out by the method described in JP-A No. 61-155325 or a method similar to this. Methods such as drying, spraying, and granulation are employed.

In the present invention, the terpenoid may be used dissolved in a solvent. In this case, the solvent may be any solvent as long as it does not impair the rodent repellent activity of the terpenoid. Examples of such solvents include methyl alcohol, ethyl alcohol, etc. alcohol,
Alcohols such as propyl alcohol and butyl alcohol: ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, ethyl butyl ketone, and cyclohexanone 1! l: ethyl ether, butyl ether, amyl ether, hexyl ether, ethyl vinyl ether,
Ethers such as cellosolve and calpitol: hexane,
heptano, octane, benzene, toluene, xylene,
Hydrocarbon solvents such as aliphatic hydrocarbons such as cyclohexane and aromatic hydrocarbons: Mineral oils such as kerosene, light oil, and paraffin oil M
:Acetate ester, propionate ester, butyrate ester, lactic acid ester, oxalate ester, crotonate ester, salicylate ester, benzoate ester, phthalate ester, adipate ester, sebacate ester,
Esters such as phosphoric acid esters: Examples include low molecular weight epoxy resins.

Furthermore, terpenoids may be used with the solvents shown below, and the esters include dimethyl phthalate, diethyl phthalate, dibutyl phthalate, diethyl phthalate, dioctyl phthalate, diisodecyl phthalate, butylbenzyl phthalate, dimethyl isophthalate, di-2-ethyl Phthalate esters such as hexyl phthalate, ditridecyl phthalate, di-normal alkyl phthalate; adipate esters such as diisobutyl adipate and dioctyl adipate; dibenzyl sebacate;
It is preferable to select from phosphate esters such as sebacate esters such as dioctyl sebacate, triphenyl diphosphate, tricresyl phosphate, trioctyl phosphate, and octyldiphenyl phosphate.

The wall material of the microcapsules of the present invention may be made of a polymeric material formed using a monomer or a reactive material such as a low molecular weight prepolymer, such as a urea resin, a melamine resin, a urea/melamine mixed resin, or a phenol resin. , polyamide, polyester, voluria, polyurethane and the like, as well as those made of inorganic materials such as calcium carbonate and calcium silicate.

In the present invention, examples of the porous substance for containing the terpenoid include porous silica such as Shirasu balloon, inorganic porous substances such as zeolite, activated carbon, and activated clay.

Examples of methods for incorporating the terpenoid into the porous material include means such as adsorption and impregnation.

The rodent repellent of the present invention may contain other rodent repellents, antioxidants, colorants, fillers, flame retardants (magnesium hydroxide, aluminum hydroxide, halogen organic flame retardants, antimony trioxide, etc.), etc. May be blended.

The rodent repellent of the present invention is preferably used as a rodent repellent for organic polymers. ,bamboo,
Synthetic organic polymers include plasticized or non-plasticized polyvinyl chloride, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylic acid copolymer, ethylene-propylene, etc. Copolymers, ethylene-propylene-diene terpolymers, ultra-low-density linear polyethylene, low- to high-density polyethylene or crosslinked products thereof, ultra-high molecular weight polyethylene, poly-4-methylpentene-11 nylon , polyester, various rubbers,
Examples include thermoplastic elastomers and other synthetic organic polymers.

These are commercialized in the form of resin molded products, paints, adhesives, etc.

The content of terpenoids in the rodent repellent of the present invention is 1 to 1000 parts by weight, preferably 10 to 500 parts by weight, per 100 parts by weight of 1 ton of wall material or porous material. i
Parts by weight, particularly preferably 10 to 200 parts by weight. Regarding the amount of terpenoids mentioned above, the above amount may be used not only when using terpenoids alone, but also when using terpenoid mixtures such as essential oils and crude extracts from plants (phytoncide, etc.). The same applies to the description of .

The amount of the rodent repellent of the present invention to be used is, for example, when kneaded into a synthetic organic polymer intended for rodent repellent,
flN part attack, i[l usually about 0.1 to 10.01 parts by weight, preferably about 1 to 50 parts by weight.

The composition comprising the above synthetic organic polymers and the rodent repellent of the present invention may be molded into desired articles by extrusion molding, injection molding, etc., or primary molded products such as tapes, sheets, pipes, etc. Furthermore, the rodent repellent of the present invention may be used in the form of a paint together with common paint-forming materials, or may be used in the form of a paint, such as polybutene, grease, asphalt, silicone, atactic polypropylene, microcrystalline wax, It may be used in the form of a putty by using it together with a viscous liquid or semi-solid such as liquid Rolobrene rubber.

[Example/Experiment example]

The present invention will be specifically described below based on Examples and Experimental Examples.

Reference Example 1 Finely chopped fresh leaves of Hinoki cypress were placed in an extraction flask, heated and extracted in water, and the extract obtained by distilling with steam was left to stand to obtain an essential oil containing terpenoids as an oil layer.

Example I Rodent repellent made by microcapsulating the essential oil of Reference Example 1 in polyamide (containing essential oil ii: about 8 mL) Example 2 Porous silica with an average particle size of about 10 μm was placed in a vacuum container. The vacuum was then evacuated at 10 mmHg for 1 hour, and then the essential oil of Reference Example I was injected into the vacuum container, and the pressure was then returned to normal to incorporate the essential oil into the porous silica, thus reducing the essential oil content. Approximately 80% by weight of rodent repellent was produced.

Example 3 Instead of the porous silica of Example 2, the average particle size was about 8 pm.
A rodent repellent having an essential oil content of about 50% by weight was produced by using the zeolite and treating according to Example 2.

Reference Example 2 A mixture of various shrub chips was placed in an extraction flask, heated and extracted in water, and the extract obtained by distilling with steam was allowed to stand to obtain Nea oil containing terpenoids as an oil layer.

Example 4 The essential oil of Reference Example 2 was used in place of the essential oil of Reference Example 1 used in Example 2, and a rodent repellent with an essential oil content of approximately 50% by weight was obtained by treating according to Example 2. was manufactured.

Experimental Example 1 In a polyvinyl chloride loft with a length of 15CI and a diameter of
1III11 thick rodent repellent layer containing each of the rodent repellents (4) (50 parts by weight of rodent repellent per 100 parts by weight of the polymer composition)
We have prepared one with

As a comparative example, a product with a similar structure but containing no rodent repellent was prepared.

Using the samples of the above Examples and Comparative Examples, an experiment was conducted to measure the rat-proofing effect using the following test method.

(Rodent-proof test method) Each sample was placed in a cage with 3 rats under constant feeding and water supply.
The samples were placed together with other rats, left for one day, and examined for chewing damage caused by the sample rats. In the evaluation, if the loft of the sample was bitten to the extent that it was exposed, the bite was considered to be present, and if the rat-proof layer of the sample was only left with mouse tooth marks, the bite was judged to be non-bite.

As a result, the samples containing the rodent repellents of Examples 1 to 4 had no biting damage, while the comparative samples had biting damage.

〔effect〕

The rodent repellent of the present invention has an excellent rat repellent effect against rats,
Furthermore, the terpenoids which are the rodent repellent ingredients are inexpensive, and the rodent repellent of the present invention maintains its rodent repellent activity for a long time, making it extremely useful as a rodent repellent for electric wires, building materials, etc.

Claims (2)

[Claims] (1) A rodent repellent containing at least one type of active ingredient selected from terpenoids microencapsulated in a wall substance and terpenoids contained in a porous substance. (2) The rodent repellent according to claim 1, wherein an essential oil containing 10% by weight or less of volatile components with a boiling point of 200° C. or less is blended as a terpenoid.