WO2010073747A1

WO2010073747A1 - Deodorizing material with sustained vaporization properties for use in automobiles

Info

Publication number: WO2010073747A1
Application number: PCT/JP2009/057468
Authority: WO
Inventors: 昭夫小林; 智子嬉野; 俊幸奥谷; 勝久滝下
Original assignee: 石原薬品株式会社
Priority date: 2008-12-25
Filing date: 2009-04-13
Publication date: 2010-07-01
Also published as: JP2010148736A; CN102333549A; JP5468774B2

Abstract

Disclosed is a deodorizing material which, when employed inside a conventional automobile vehicle compartment, and especially inside a vehicle compartment fitted with an air conditioner, provides a stable deodorizing effect because it vaporizes over a long period, and, moreover, does not have any adverse effect on the air conditioner circuit. The deodorizing material has sustained vaporization properties and is for use in vehicles, and it comprises a fibrous sheet impregnated with, as an active ingredient, at least one phenol-based antimicrobial compound having in the molecular structure a hydroxyl group which binds readily with sources of unpleasant smells such as amines.

Description

Volatile sustainable deodorant material for automobile interior

The present invention is disposed in a vehicle interior, particularly in an air conditioner-equipped vehicle interior, and odors generated from the inside of an air conditioner circuit, for example, odors caused by the growth of microorganisms due to condensation in an evaporator are volatilized over a long period of time. The present invention relates to a deodorizing material for prevention.

In automobile cabins, especially in cabins equipped with air conditioners, it is inevitable that odors generated from the circuit inside the air conditioners and unpleasant odors caused by smoking are filled. Currently, the air conditioner is always in operation throughout the year, and miscellaneous dust and smoke adhere to and accumulate on the filter part from the outside air. There is.

As a deodorant for suppressing the odor in the interior of such an automobile, it has so far supported deodorant materials made of adsorptive porous materials such as activated carbon and silica gel, and natural or synthetic inorganic or organic deodorant substances. Deodorant materials supported on the body are known, but these deodorant materials have a deterrency within a certain period due to their limited adsorption capacity, but after that they have the disadvantage of losing deodorant properties. is there.

As an improvement of these disadvantages, orthophenylphenol, 4-chloro-3,5-dimethylphenol, 2-methyl-3-chlorophenol, methylphenol, methylparaben, ethylparaben, propylparaben, butylparaben, isopropylmethyl A stationary deodorant in which a granular material containing at least one sterilizing component selected from phenol, 8-quinolinol and sodium benzoate is contained in a breathable package has been proposed (Patent Document 1). reference).

On the other hand, antibacterial and antifungal agents (see Patent Document 2) in which a mixture of pellets containing colorants, antibacterial and antibacterial components and pellets containing aroma and deodorant are enclosed in a breathable packaging sheet, and an air conditioner circuit In order to suppress bacteria generated in the inside and prevent malodor, an antibacterial agent is dispersed in an aqueous solvent using an alkali metal salt of a fatty acid having a tertiary carboxyl group and having 8 or more carbon atoms as a dispersant, and an air conditioner circuit A method of spraying and fixing inside (see Patent Document 3), a fungicidal packaging material in which a base sheet is impregnated with a vaporizable antibacterial agent solid at room temperature, for example, parachlorometaxylenol (see Patent Document 4) An antibacterial product in which a molten mixture obtained by melting and mixing a color former and an aliphatic alcohol having a melting point of 30 to 200 ° C. with a phenol compound having a room temperature volatility is supported on an organic porous carrier (See Patent Document 5) have been proposed.

However, the deodorizing action in these prior arts is temporary or restrictive and cannot show the deodorizing action continuously over a long period of time.

JP2002-263178A (Claims and others) JP2002-369870A (Claims and others) JP3-146063A (Claims and others) JP11-91829A (Claims and others) JP2004-262898A (Claims and others) JP2003-261900A (Claims and others)

The present invention provides a stable deodorizing effect over a long period of time when used in a vehicle interior of a conventional automobile, particularly in a vehicle installed with an air conditioner, and has no adverse effect on the air conditioner circuit. It was made to provide odor materials.

As a result of intensive research to develop a deodorant material for use in the interior of an automobile, the present inventors have found that a phenolic antibacterial having a hydroxyl group in its molecular structure that easily binds to malodorous sources such as amines. Based on this finding, it was found that the active compound used as an active ingredient and the fiber board impregnated with this compound has volatility and sustained release and can continue to exhibit a deodorizing action over a long period of time. The present invention has been made.

That is, the present invention provides a volatilization sustained deodorizing material for automobile interiors comprising a fiber board impregnated with at least one phenolic antibacterial compound as an active ingredient.

According to the present invention, not only bad odors generated in the passenger compartment, especially bacteria that propagate in air conditioners, bad odors caused by spoilage odor of cigarettes, but also odors derived from tobacco smoke, sweat, body odor components, etc. over a long period of time. Materials that can be suppressed are provided.

In addition, since the deodorant material of the present invention contains an antibacterial compound at a high concentration, the volatilization amount is large, and since it is not packaged simply by fixing with a punch holder, the volatilization is not hindered and is long. There is an advantage that the volatilization of the antibacterial compound can be used continuously over a period of time.

The graph which shows the time-dependent change (day) of content (g) of the active ingredient in a reference example.

A phenolic antibacterial compound is used as an active ingredient in the deodorant material of the present invention. Since this compound has a low molecular weight of 200 or less, it has volatility, is safe for the human body, does not adversely affect the air conditioner circuit, and has a hydroxyl group. It has a binding property with a certain amine and can effectively remove the malodor. Examples of such compounds include o-phenylphenol, m-cresol, 4-chloro-3,5-dimethylphenol, 2-methyl-3-chlorophenol, methylparaben, ethylparaben, propylparaben, butylparaben, isopropylmethyl. Phenol, 8-quinolinol and the like can be mentioned. Among these, o-phenylphenol, 4-chloro-3,5-dimethylphenol, and 2-methyl-3-chlorophenol are preferable because they can effectively remove malodor. These compounds may be used alone or in combination of two or more.

Next, a plate-like body such as paper, pulp or felt is used as the fiber board to be impregnated with this active ingredient. As the shape of the plate-like body, any shape such as a square, a circle, an oval, a rhombus, etc., can be selected. It is preferable to form a rectangular parallelepiped having a thickness of 2 to 4 mm.

The content ratio of the active ingredient relative to the fiberboard is usually selected in the range of 10 to 60% by mass, preferably 30 to 50% by mass based on the mass of the fiberboard. If the amount is less than 10% by mass, the deodorizing ability becomes insufficient. If the amount exceeds 60% by mass, the excess amount may be exuded and contaminated when contacting an object. In addition, the sustainability of the deodorizing effect becomes longer as the content ratio increases.

The deodorant material of the present invention can further contain an adsorptive substance to improve the ability to remove malodors as desired. Examples of such adsorptive substances include activated carbon, graphite, carbon black, zeolite, and silicate gel.

If the content of these adsorptive substances is too large, the performance of the deodorizing material of the present invention is impaired, so the content is 50% by mass or less, preferably 30% by mass or less based on the mass of the fiberboard. It is good.

In addition, the deodorizing material of the present invention may contain a plant extract as a deodorizing component in order to further improve the deodorizing effect. Examples of such plant extract include peppermint oil, tea tree oil, rosemary oil, and hiba oil. The content ratio of these plant extracts is selected in the range of 0.01 to 2% by mass, preferably 0.05 to 1% by mass, based on the mass of the fiberboard.

The deodorant material of the present invention can be used by placing it at any location in the passenger compartment, the position of the passenger's foot, the outside of the air conditioner, and the inside of the blower unit inside air inlet.

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.

In addition, the antibacterial properties and deodorizing properties in Examples and Comparative Examples are evaluated by the following methods.

(1) Antibacterial property The deodorant material (30 × 20 × 3 mm) of the present invention was accommodated in a sample volatilization open-hole container (drilling holder) and left in a thermostat kept at 50 ° C. for a predetermined number of days.

Next, the deodorizing material is taken out from the container, and is attached to the center inside the lid of the petri dish containing the medium coated with A. niger on the entire surface with a double-sided adhesive tape and left at 25 ° C. for 3 days. did. The effect of each deodorant material after the passage of a predetermined number of days at 50 ° C. was evaluated by measuring the size of a circle in which the growth of black koji mold was prevented and based on the following criteria.
○: 50 mm or more Δ: 30 mm or more and less than 50 mm ×: less than 30 mm

(2) Deodorant A small cup was placed in a 5 liter desiccator, and 0.1 ml of a 1% ammonia-ethanol solution was placed therein. Next, the same deodorizing material used in (1) is taken out of the container after a predetermined number of days, and arranged next to each small cup, and the odor concentration after being left for 30 minutes using a detector tube is measured. The deodorization rate was evaluated according to the following criteria. The higher this value, the higher the deodorizing effect.

○: 30% or more Δ: 20% or more and less than 30% ×: less than 20%

Reference Example: An aluminum bag-like body provided with a fiberboard (30 × 20 × 3 mm) made of paper fiber impregnated with 0.23 g of 4-chloro-3,5-dimethylphenol and provided with an air passage window (7 × 7 mm) The content of 4-chloro-3,5-dimethylphenol was measured over time under the condition of being stored in (50 × 50 mm) (drilled holder) and kept at 50 ° C. The results are shown in FIG. 1 as a graph.

Next, when an approximate expression of the number of days (x) with respect to the mass change amount (y) was obtained based on this graph,
y = −0.0071x−0.02521
It became.

Based on this formula, the total number of days for which 4-chloro-3,5-dimethylphenol was volatilized was calculated to be 288 days.

From this, it can be inferred that the fiberboard impregnated with 4-chloro-3,5-dimethylphenol as an active ingredient can last for at least 180 days.

Example Paper using potato dextrose agar medium inoculated with black spore spores and containing 40% by mass of 2-methyl-3-chlorophenol, 4-chloro-3,5-dimethylphenol or o-phenylphenol as active ingredients About the fiber board (30x20x3mm) which consists of fibers, the antibacterial property and deodorizing property of each deodorizing material after leaving at 50 degreeC for 3 days, 7 days, 14 days, 21 days, and 30 days were measured. The results are shown in Table 1.

Comparative Example 1
50 ° C. exactly as in the Examples except that 2- (4-thiazolyl) benzimidazole, zinc bis (2-pyridylthio-1-oxide) or hexadecylpyridinium chloride is used as the active ingredient instead of the active ingredient in the Examples. Then, the antibacterial and deodorant properties were measured in the same manner. The results are shown in Table 2.

Comparative Example 2
2-Methyl-3-chlorophenol, 4-chloro-3,5-dimethylphenol or o-phenylphenol mixed with paraffin, and beads with an average particle size of 3 mm, based on the total content of 0.1% by mass Manufactured. This was stored in a breathable cloth bag and used in almost the same volume as in the Examples. Similarly, the black block inhibition state was measured for 30 days, but all were less than 30 mm and showed low antibacterial properties. Moreover, it was found that the deodorizing property is less than 20%, which is inferior to the deodorizing material of the present invention.

The deodorant material of the present invention is suitable as a deodorant material for automobile cabins, particularly in a room where an air conditioner is installed.

Claims

A volatilization sustained deodorizing material for automobile interiors comprising a fiberboard impregnated with at least one phenolic antibacterial compound as an active ingredient.
The deodorant material according to claim 1, wherein the phenolic antibacterial compound is o-phenylphenol, 2-methyl-3-chlorophenol or 4-chloro-3,5-dimethylphenol.
The deodorant material according to claim 1 or 2, impregnated with 10 to 60% by mass of an active ingredient based on the mass of the fiberboard
The deodorant material according to claim 1, 2 or 3, wherein the fiberboard is a rectangular parallelepiped having a size of 25 to 35 mm in length, 15 to 25 mm in width, and 2 to 4 mm in thickness.
The deodorant material according to any one of claims 1 to 4, comprising a plant extract as a deodorant component.