JPH0268364A - Miticidal carpet - Google Patents

Abstract

PURPOSE:To obtain the title carpet of high sustained releasability and having miticidal effect for a long period by incorporating menthone into the fibrous layer of a carpet and a resinous layer provided on the back surface of said fibrous layer. CONSTITUTION:The back surface of e.g., a carpet made from natural or synthetic fiber is coated with, e.g., as a backing resin, a latex composition prepared by adding (1) a sustainedly releasable formulation prepared by dispersing l- menthone in a preparation solution from cyclodextrin and water to (2) a latex from styrene-butadiene rubber or butadiene rubber, followed by hot-air drying, thus obtaining the objective miticidal carpet having great sustained effect for a long period.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to an acaricidal rug. For more details,
The present invention relates to a rug that has a sustained release effect on acaricidal agents.

(B) Conventional Technology House dust mites have long been well known as indoor mites that cause serious damage to humans.

However, as times have changed, the damage caused by dust mites has decreased, and new types of mite damage have begun to attract attention. The problem is now caused by allergy mites caused by mites and dust mites that live in houses, which were once thought to be harmless, as well as by the mites that prey on these mites, and now mite damage is common in developed countries. As we enter a new phase, these problems are increasing year by year, and there is a tendency for them to become more and more serious.

By the way, attempts have been made to repurpose organophosphorus insecticides, carbamate insecticides, pyrethroid insecticides, etc., which have traditionally been used to control pests, and use them as spray agents to control mite damage. There is.

On the other hand, a known pest repellent such as N,N-trimethyltoluamine is directly mixed into carpets such as car vents, where mites are easily infested and inhabited indoors, and especially into the linden wood, to prevent the spread of mites. Pest-repellent carpets made to suppress pests are known (Utility Model Publication No. 57-120386).
Publication No.).

(c) Problems to be solved by the invention However, none of the above-mentioned conventional insecticides used for controlling mites are decisive factors in control, and furthermore, they pose problems in terms of safety, environmental pollution, etc. It's the remnants.

On the other hand, although the pest-repellent carpet mentioned above is described as having a repelling effect on pests such as fleas, ticks, bedbugs, and cockroaches, the miticidal effect of the pest-repellent substance used is not described, and it is also said that it lasts for a long time. The safety of use for humans is also unknown.

The inventors of this invention conducted intensive research on a drug that has a remarkable acaricidal effect on mites, especially indoor mites, and found that it has a mite-killing effect on Q-menthon. . That is, to the best of the inventors' knowledge, there have been no effective drugs that can kill indoor dust mites such as the Dermatophagoides mites, which cause asthma, and the biting claw mites, upon immediate contact. However, the inventors found that ρ-menthone not only can easily kill any of the indoor mites mentioned above even in small amounts by contact, but also has the effect of killing the mites mites with its vapor alone. was confirmed. Furthermore, it is well known that ρ-menthone is highly safe for the human body.

Therefore, the inventors thought that the indoor mites could be effectively exterminated by using ρ-menthone, which is the active ingredient of the new step mite agent, in rugs.

However, rugs are always used for a long period of time.
Therefore, when using the above-mentioned chemicals, it is required that the volatilization is persistent over a long period of time.

This invention was made in view of the above circumstances, and aims to provide a rug that can sustain the goo-killing effect by using a new acaricidal ingredient, Q-methtone, which is gradually volatilized and formulated into a waxy formulation. It's Shino.

(d) Means for Solving the Problems Thus, according to the present invention, in a rug basically composed of a fiber layer and a filter resin layer provided on the back side of the fiber layer, a sustained release preparation containing menthone in the resin layer is provided. Provided is a miticidal rug characterized by containing:

The rug to which the present invention is applied may be of any type as long as it is basically composed of a fiber layer and a resin layer bonded to the back surface of the fiber layer, and the material, shape, structure, etc. Not particularly limited. Typical examples of such rugs include carpets and various types of cloaks. Examples of the above-mentioned car vents include loop carpets, tufted carpets such as cut carpets, neatle punch carpets, and carpets lined with these carpets. The fiber layer may be made of natural fibers or synthetic fibers.

The resin layer in this invention means a resin layer that is applied and adhered to the back surface of the base fabric layer that supports the flocked layer in a rug, or the back surface of the panning layer. This resin layer has
A resin made of a known resin commonly used in the field can be used as is.

Latex can be mentioned as a typical example of the above-mentioned resin. The latex is usually used in the form of a latex emulsion in which colloidal natural rubber or synthetic rubber particles are emulsified and dispersed in an aqueous phase. The synthetic rubber particles may be any known synthetic rubber particles, and among these, styrene-butane rubber, butadiene rubber, acrylonitrile-butane rubber, acrylic rubber, or mixtures thereof are preferred. The size of these rubber particles and their content in the aqueous phase may be within the range commonly used in the field.

A menthone-containing sustained release preparation is added and mixed into the latex emulsion. For the menthone mentioned above, an essential oil containing substantially Q-menthone is used. “Substantially containing” means
At least about 10% (by weight) or more, preferably about 25%
The above means that the content is more preferably 32% or more. Therefore, other isomers of menthone may be included in addition to ρ-menthone. Examples of substances that substantially contain Q-menthone include Mentha
arvensis Lvar, piperascens
Holmes) and Seiyouno'y-tsuka (Men
tha Piperita L, )), beniroyal oil, dementholized heart oil (also known as menthone oil (ρ-menthone content: approx. 70
%) or white oil (turmentone content: 30%)]. Does the active ingredient listed above belong to monoterpene compounds? Monoterpene compounds are generally used in cosmetics, flavors, etc., and have been confirmed to be safe in terms of skin irritation, oral toxicity, etc., and have been tested in humans and animals. It is significantly safer for fish than conventional insecticides. Regarding the safety of turmentone, in addition to being approved as a flavoring agent for food additives, turmentone is also contained in pharmacopoeia turmeric oil, which has long been used as a raw material for the production of aromatic stomach medicines and poultices.
It has been empirically proven through long-term use. This active ingredient has an extremely strong acaricidal activity against mites that occur in homes, especially against dust mites, mites, and mites that belong to the house dust mite family, such as mites, which are ineffective with conventional acaricides. It is something that you have.

The essential oil substantially containing a-menthone or a-menthone, which is the acaricidal active ingredient, is subjected to sustained release treatment and used as a sustained release preparation. The sustained release treatment described above can be performed using sustained release techniques known in the art, such as microencapsulation and dextrin inclusion. For example, in the case of microencapsulation, a physicochemical method using coacervate of celadine as a wall material, a chemical method using a polymer film such as polyamide or polyimide as a wall material,
A mechanical method using a melted waxy material as the wall material can be mentioned. Further, in the case of inclusion, a method using cyclodextrin can be mentioned. In this case, ncrodextrins include αβ-1γ-isomers and branched dextrins with methyl and ethyl group side chains as modified dextrins, but it is possible to use any of these or a mixture of these. It can be selected as appropriate depending on the purpose. Specifically, a slurry liquid is prepared by mixing the active ingredient termentone or a substance substantially containing termentone in a 99.1 to 70:30 (heavy ratio) mixture of water and cyclodextrin; A sustained-release preparation can be obtained by, for example, spray-trying this to form a powder-like dry product.

As the above-mentioned cyclodextrin, a mixture obtained by decomposing starch may be used as it is, or a desired cyclodextrin may be isolated and used by purifying this decomposition product. Alternatively, dextrin may be mixed with the above cyclodextrin depending on the substance to be included. - For example, when peppermint oil is selected as the target substance, dextrin is preferable for inclusion because it does not encapsulate or physically adsorbs peppermint oil. Further, in the above-mentioned sustained release preparation, the substance to be included is usually contained in the resulting dry powder in an amount of about 10 to 30% by weight.

Therefore, when peppermint oil is used as the inclusion target substance, the resulting dry powder will contain 3 to 9% by weight of the active ingredient Q-menthone.

The menthone-containing sustained release preparation obtained as described above is used in a latex emulsion in an amount sufficient to release an effective amount of the acaricidal component without inhibiting the adhesive ability of the latex. Specifically, it can be used in a wide range of about 0.1 to 100% by weight based on the solid content of the latex. For example, when the above-mentioned sustained release preparation is obtained in powder form by inclusion of cyclodextrin, it may be added and mixed in a range of 1 to 30% by weight based on the solid content of the latex. Regarding this, reference will be made to the description of the embodiment described later.

Incidentally, the latex emulsion is prepared into a latex composition by using fillers and thickeners known in the art in the usual amount range.

At this time, ordinary additives such as vulcanizing agents, vulcanization accelerators, anti-aging agents, etc. are added for the purpose of preventing deterioration or improving the quality of the rubber components within a range that does not impede the adhesive ability of the latex and the effects of the present invention. You can leave it there.

In this invention, a composition for forming a resin layer, such as the latex composition described above, is applied to the back surface of the fiber layer using a carpet coater, a spray device, or the like. In the above application, a resin composition is used so that an effective amount of the acaricidal active ingredient can be present in the resin layer after the application is formed. For example, in the case of a latex composition containing a menthone-containing sustained release preparation in the proportions mentioned above, 1 to 20%
g/cm'.

It should be noted that a backing material such as Nyuto may be attached to the back surface of the resin layer formed as described above, if necessary.

(E) Effect According to the present invention, the active ingredient is released from the sustained release preparation contained in the resin layer of a rug that basically consists of a fiber layer and a resin layer adhered to the back surface of the fiber layer. Menthone is gradually volatilized, and the atmosphere above the fiber layer and the atmosphere under the resin layer come into contact with menthone over a long period of time.

The present invention will be described in detail below with reference to Examples, but the present invention is not limited thereby.

(F) Example Sustained Release Preparation First, 120 parts of β-ncrodextrin and 30 parts of dextrin were dispersed in 850 parts of water to prepare a 15% dextrin solution. Add 40 parts of peppermint oil to this prepared liquid,
The temperature was maintained at 308C and stirred at 2.00 rpm for 1 hour to obtain a slurry liquid. Spray try this slurry liquid,
0 parts of dry powder was obtained. This powder had a Hatsukaura content of about 20%.

Preparation of latex (adhesive) Styrene-butadieno rubber latex (as solid content) 100 parts Sustained release formulation 25 parts Filler 200 parts Thickener
1 part water
50 parts The above preparation involves gradually adding the sustained release preparation to the styrene-butadiene rubber latex while stirring, then stirring for a while, then adding fillers and thickeners and stirring well. Next, water was added and mixed.

A level pile carpet made with 8 inch tufting density using 1680 de/19.8 filament 848 thread (fabric weight is 1.1 kg/m'2.
The latex composition obtained above was coated with a water-containing weight of 1.5 kg/m by a reverse coater onto a bail length of 5 mm.
2, and at the same time pasted together a tweed cloth with a basis weight of 7 oz/sq.
It was treated at °C for 6 minutes and raised.

(G) Effects of the Invention According to this invention, the acaricidal active ingredient Mettone is gradually volatilized from the sustained-release preparation contained in the resin layer, so that it remains on the fiber layer and the resin layer for a long period of time. Maintain a miticidal atmosphere below. Also, the entire room using this rug will maintain a long-lasting tiered effect.

Claims (1)

[Claims] 1. A rug basically consisting of a fiber layer and a resin layer provided on the back side of the fiber layer, characterized in that the resin layer contains a menthone-containing sustained release preparation. Acaricidal rugs.