JPWO2016143628A1 - Pest repellent stainless steel sheet and method for producing the same - Google Patents

Abstract

This pest repellent stainless steel plate includes a stainless steel plate original plate and a chemical conversion treatment layer provided on at least one surface of the stainless steel plate original plate. The content ratio of the pest repellent with respect to 100 parts by mass of the silane coupling agent is 10 to 50 parts by mass, and the adhesion amount of the chemical conversion treatment layer is 0.10 g / m 2 or more.

Description

The present invention relates to a stainless steel plate having pest repellent properties and a method for producing the same.
This application claims priority on March 6, 2015 based on Japanese Patent Application No. 2015-044643 for which it applied to Japan, and uses the content here.

The stainless steel sheet can have a high-grade appearance utilizing the beautiful metallic luster unique to stainless steel (see, for example, Patent Documents 1 and 2). For this reason, it is widely used for housings, interior materials, and cover materials of electrical appliances regardless of household or business use. Stainless steel sheets are widely used not only for their high-grade appearance but also for their corrosion resistance, so they are widely used in household or commercial kitchens and appliances installed in kitchens.
Incidentally, pests such as cockroaches tend to come close to places around the water such as kitchens and kitchens, and therefore pest control is required. In particular, many household appliances such as refrigerators and rice cookers generate heat due to their mechanism. Since household appliances that have generated heat tend to be a hotbed for insects such as cockroaches, materials used for household appliances are required to have insect repellent properties.

Generally, two types of insect repellents are known: contact repellent type and volatilization repellent type. The contact repellent-type pest repellent concentrates and is unevenly distributed on the surface layer portion of the coating film, thereby exhibiting a repellent effect when directly in contact with pests. Since the contact repellent pest repellent itself does not change in quality, a long-term sustained effect can be expected. However, when the contact repellent pest repellent is not unevenly distributed in the surface layer portion of the coating film, the effect becomes low.
Volatilization-repellent pest repellents gradually volatilize themselves, so that they do not attract pests, and have the advantage of widening the range for repelling pests. However, since the volatilization-repellent pest repellent gradually disappears due to volatilization, the repellent effect is difficult to maintain.
In household appliances and the like, it is rare to repaint or replace parts between purchase and disposal. Therefore, when providing pest repellency to household electrical appliances, a contact repellency type that easily maintains the effect is selected.
However, as described above, since only the contact repellent pest repellents present on the surface layer have a pest repellent effect, it is not easy to improve the pest repellent. Further, there has been a demand for a low cost while improving pest repellent.

Japanese Patent Laid-Open No. 02-11865 Japanese Patent Laid-Open No. 2002-143762

  An object of the present invention is to provide a pest repellent stainless steel sheet having a high pest repellent property and a low cost, and a method for producing the same.

The pest repellent stainless steel plate according to one aspect of the present invention includes a stainless steel plate original plate and a chemical conversion treatment layer provided on at least one surface of the stainless steel plate original plate, and the chemical conversion treatment layer comprises a synthetic pyrethroid compound. The pest repellent and the silane coupling agent are contained, the content of the pest repellent is 10 to 50 parts by mass with respect to 100 parts by mass of the silane coupling agent, and the adhesion amount of the chemical conversion treatment layer is 0. .10 g / m ² or more.
The method for producing a pest repellent stainless steel plate according to one aspect of the present invention includes a step of applying a chemical conversion treatment liquid to at least one surface of a stainless steel plate, and drying to form a chemical conversion treatment layer. The treatment liquid contains a pest repellent containing a synthetic pyrethroid compound, a silane coupling agent, and a solvent, and the content of the pest repellent is 10 to 50 parts by mass with respect to 100 parts by mass of the silane coupling agent. And the dry coating amount of the chemical conversion solution is 0.10 g / m ² or more.

The pest repellent stainless steel plate according to one embodiment of the present invention has high pest repellent property and low cost.
According to the method for producing a pest repellent stainless steel sheet according to one embodiment of the present invention, a pest repellent stainless steel sheet having high pest repellent and low cost can be easily produced.

It is a top view which shows the cover for a test used when pest repellency is evaluated. It is a perspective view which shows the test body used when pest repellency is evaluated. It is a top view explaining the evaluation method of pest repellent.

<Pest repellent stainless steel sheet>
The pest repellent stainless steel plate of the present embodiment includes a stainless steel plate and a chemical conversion treatment layer provided on at least one surface of the stainless steel plate. The pest repellent stainless steel plate of this embodiment does not include a top coat such as a clear coating film, and the chemical conversion treatment layer is the outermost layer.

(Stainless steel plate)
Examples of the stainless steel plate used in the present embodiment include commonly used stainless steel plates such as ferrite, austenite, and martensite.
Further, the surface of the stainless steel plate may be polished by various polishing methods. As a polishing method, for example, No. defined in the JIS standard is used. 4 polishing, HL polishing and the like.

(Chemical conversion treatment layer)
The chemical conversion treatment layer is a layer provided for protecting the stainless steel plate. A normal stainless steel plate is provided with a chemical conversion treatment layer.
The chemical conversion treatment layer in this embodiment contains a silane coupling agent and a pest repellent, and may contain a resin as an optional component. Usually, a chromate treatment solution is used as a chemical conversion treatment agent for stainless steel plates. If the chemical conversion treatment layer contains a silane coupling agent, it is not necessary to use a chromate treatment solution. For this reason, it can be made chromate-free and the load on the environment can be suppressed.
As the silane coupling agent, at least one of an aminosilane-based silane coupling agent and an epoxysilane-based silane coupling agent is preferable.
Here, as the aminosilane coupling agent, for example, N-2 (aminoethyl) 3-aminopropylmethyldimethoxysilane, N-2 (aminoethyl) 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane Etc.
Examples of the epoxy-based silane coupling agent include 2- (3,4 epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, and the like.
The said silane coupling agent may be used individually by 1 type, and may use 2 or more types together.

The adhesion amount of the chemical conversion treatment layer is 0.10 g / m ² or more in order to ensure pest repellent properties.
On the other hand, the adhesion amount of the chemical conversion treatment layer is preferably 0.30 g / m ² or less. If the adhesion amount of the chemical conversion layer exceeds the upper limit, the chemical conversion layer may not be formed stably. Moreover, since the chemical conversion treatment layer becomes thick and it becomes difficult to see the base of the stainless steel plate, the aesthetic appearance unique to stainless steel may be impaired.
Further, the adhesion amount of the chemical conversion layer is more preferably 0.18~0.30g / ^{m 2,} further preferably 0.20~0.30g / ^{m 2.}
The adhesion amount of the chemical conversion treatment layer is determined by the following procedure. First, the adhesion amount of an element derived from a silane coupling agent is measured by fluorescent X-ray analysis to obtain the adhesion amount of the silane coupling agent. Subsequently, the adhesion amount of a chemical conversion treatment layer is calculated | required by a following formula.
Adhesion amount of chemical conversion treatment layer = Adhesion amount of silane coupling obtained by fluorescent X-ray analysis x {(solid content (mass) of silane coupling agent contained in chemical conversion solution + pest repellent contained in chemical conversion treatment solution) Solid content (mass)) / (solid content of silane coupling agent contained in chemical conversion liquid (mass))}
When the chemical conversion treatment layer is provided on both surfaces of the stainless steel plate, the amount of adhesion of both chemical conversion treatment layers may be the same or different.

The pest repellent contained in the chemical conversion treatment layer includes a synthetic pyrethroid compound that is a contact repellent pest repellent. In this embodiment, the pest repellent is composed only of a synthetic pyrethroid compound.
As a synthetic pyrethroid compound, acrinatrin << chemical name: S-α-cyano-3-phenoxybenzyl = (Z)-(1R, 3S) -2,2-dimethyl-3- [2- (2,2,2 -Trifluoro-1-trifluoromethylethoxycarbonyl) vinyl] cyclopropanecarboxylate >> aresulin I << chemical name: 2,2-dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylic acid 2-methyl- 4-oxo-3- (2-propenyl) -2-cyclopenten-1-yl ester >>, allethrin II << chemical name: 3- (3-methoxy-2-methyl-3-oxo-1-propenyl) -2, 2-dimethylcyclopropanecarboxylic acid 2-methyl-4-oxo-3- (2-propenyl) -2-cyclopenten-1-yl ester >>, D-teto Rametrin << Chemical Name: (1R) -2,2-Dimethyl-3β- (2-methyl-1-propenyl) cyclopropane-1β-carboxylic acid [(1,3,4,5,6,7-hexahydro-1 , 3-Dioxo-2H-isoindol) -2-yl] methyl >>, Resmethrin << Chemical name: 2,2-Dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylic acid (5-benzyl-3) -Furyl) methyl >>, furamethrin << chemical name: 2,2-dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylic acid 5-propargylfuran-2-ylmethyl >>, phenothrin << chemical name: 2,2 -Dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylic acid m-phenoxybenzyl >>, permethrin << chemical name: 3- (2,2-dichloroeth ) -2,2-dimethylcyclopropane-1-carboxylic acid (3-phenoxybenzyl) >>, ciphenothrin << chemical name: 2,2-dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylic acid Cyano (3-phenoxyphenyl) methyl >>, brathrin << Chemical name: 2,2-dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylic acid (6-chloro-1,3-benzodioxole- 5-yl) methyl >>, etofenblox << chemical name: 2- (4-ethoxyphenyl) -2-methylpropyl = 3-phenoxybenzyl ether >>, cyfluthrin << chemical name: 2- (2,2-dichlorovinyl) -3,3-dimethylcyclopropanecarboxylic acid α-cyano-4-fluoro-3-phenoxybenzyl >> tefluthrin << chemical name: 2, 3 , 5,6-tetrafluoro-4-methylbenzyl = (Z)-(1RS, 3RS) -3- (2-chloro-3,3,3-trifluoro-1-propenyl) -2,2-dimethylcyclo Propanecarboxylate >>, bifenthrin << Chemical name: 2-methylbiphenyl-3-ylmethyl = (1RS, 2RS) -2- (Z)-(2-chloro-3,3,3-trifluoro-1-propenyl)- 3,3-dimethylcyclopropanecarboxylate, profluthrin << chemical name: (1R) -2,2-dimethyl-3α-[(Z) -1-propenyl] cyclopropane-1β-carboxylic acid-2,3,5 , 6-tetrafluoro-4-methylbenzyl >>, metfurthrin << chemical name: (1R, 3R) -2,2-dimethyl-3- (1-propenyl) cyclopropanecarboxylic acid 2,3,5,6 Tetrafluoro-4- (methoxymethyl) benzyl >>, transfluthrin << chemical name: (1R, 3S) -3- (2,2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylic acid (2,3, 5,6-tetrafluorophenyl) methyl >>, pyrethrin << chemical name: (1R, 3R) -3-[(E) -3-methoxy-2-methyl-3-oxo-1-propenyl] -2,2- Dimethylcyclopropanecarboxylic acid (S) -2-methyl-4-oxo-3-[(Z) -2,4-pentadienyl] -2-cyclopenten-1-yl >>, empentrin << chemical name: (1R) -2 , 2-dimethyl-3- (2-methyl-1-propenyl) cyclopropanecarboxylic acid 1-ethynyl-2-methyl-2-pentenyl >>, plaretrin << chemical name: 2,2-dimethyl-3- (2- Methyl-1-propen-1-yl) -1-cyclopropanecarboxylic acid 2-methyl-4-oxo-3- (2-propynyl) -2-cyclopenten-1-yl >>, imiprothrin << Chemical name: 2,2 -Dimethyl-3- (2-methyl-1-propenyl) -1-cyclopropanecarboxylic acid [2,5-dioxo-3- (2-propynyl) imidazolidin-1-yl] methyl >> and the like. As a pest repellent, 1 type selected from the said compound group may be used independently, and 2 or more types may be used together.

  As a pest repellent, since it has higher pest repellent properties, and also has high heat resistance and long-lasting pest repellent effect, acrinathrin << chemical name: S-α-cyano-3-phenoxybenzyl = (Z)-(1R , 3S) -2,2-dimethyl-3- [2- (2,2,2-trifluoro-1-trifluoromethylethoxycarbonyl) vinyl] cyclopropanecarboxylate >> is preferred.

In the chemical conversion treatment layer, when the content of the silane coupling agent is 100 parts by mass, the content ratio (content) of the pest repellent is 10 to 50 parts by mass, and preferably 10 to 25 parts by mass. .
When the content ratio of the pest repellent is less than the lower limit, the pest repellent effect is not sufficiently exhibited. On the other hand, when the content ratio of the pest repellent exceeds the upper limit, the improvement of the pest repellent effect reaches its peak, and even if the content ratio is increased, the cost is increased and it is useless.

  The chemical conversion treatment layer may contain a colorant and the like as long as the formation and functions of the chemical conversion treatment layer are not impaired.

<Method for producing pest repellent stainless steel sheet>
The method for producing a pest repellent stainless steel plate according to the present embodiment includes a step of forming a chemical conversion treatment layer by applying a chemical conversion treatment liquid to at least one surface of a stainless steel plate original plate and drying it.

The chemical conversion treatment liquid is a liquid containing a pest repellent containing a synthetic pyrethroid compound, a binder, and a solvent. In this embodiment, the pest repellent is composed only of a synthetic pyrethroid compound.
There is no restriction | limiting in particular as a solvent contained in a chemical conversion liquid, For example, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, ethyl acetate, butyl acetate, isobutyl acetate, toluene etc. can be used. One type selected from the solvent group may be used alone, or two or more types may be used in combination.
The chemical conversion treatment liquid may contain a colorant in order to impart design properties to the pest repellent stainless steel plate.

In the chemical conversion liquid, when the content of the silane coupling agent is 100 parts by mass, the content ratio (content) of the pest repellent is 10 to 50 parts by mass, and preferably 10 to 25 parts by mass. .
When the content ratio of the pest repellent is less than the lower limit, the pest repellent effect is not sufficiently exhibited. On the other hand, when the content ratio of the pest repellent exceeds the upper limit, the improvement of the pest repellent effect reaches its peak, and even if the content ratio is increased, the cost is increased and it is useless.

The method for applying the chemical conversion liquid is not particularly limited, and for example, spraying, roll coating, bar coating, curtain flow coating, electrostatic coating, and the like can be employed.
Moreover, when forming a chemical conversion treatment layer after application | coating of a chemical conversion treatment liquid, it is preferable to bake and dry so that the surface arrival temperature (PMT) of a stainless steel plate may be set to 60-140 degreeC.

<Operational effects of this embodiment>
In the pest repellent stainless steel plate of this embodiment, since the chemical conversion layer contains the pest repellent in the above-mentioned specific amount, the pest repellent is high. In particular, when the chemical conversion treatment layer is thinned, the amount of the pest repellent present on the surface of the chemical conversion treatment layer increases, so that the pest repellent property can be further increased. Also, the use efficiency of the pest repellent is increased.
In the production of a stainless steel plate, the formation of the chemical conversion treatment layer is a normal process. For this reason, if a pest repellent is contained in the chemical conversion treatment layer, pest repellent can be imparted to the stainless steel plate at low cost without adding special equipment and processes.

  Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples. However, the present invention is not limited to the following examples.

Example 1
As a stainless steel plate, a stainless steel plate SUS430 / No. Manufactured by Nippon Steel & Sumikin Stainless Steel Co., Ltd. 4 Abrasive finish was used.
A non-chromate chemical conversion treatment solution containing an aminosilane-based silane coupling agent, acrinathrine, and a solvent in the following content ratio was prepared.
Content ratio of aminosilane coupling agent: 2.0 parts by mass, content ratio of acrinatrin: 0.2 parts by mass, content ratio of solvent: 98.0 parts by mass.
The non-chromate chemical conversion treatment solution was applied to both surfaces of this stainless steel plate using a roll coater so that the dry coating amount of the chemical conversion treatment solution was 0.18 g / m ² . Next, the surface treatment temperature (PMT) was baked to 100 ° C. and dried to form a chemical conversion treatment layer to obtain a stainless steel plate. When the aminosilane coupling agent was 100 parts by mass, the content of acrinatrin was 10.0 parts by mass.

(Example 2)
A stainless steel plate as in Example 1 except that the content of acrinathrin in the chemical conversion treatment liquid was changed to 0.5 parts by mass and the content of acrinathrin with respect to 100 parts by mass of the aminosilane coupling agent was changed to 25.0 parts by mass. Got.

(Example 3)
A stainless steel plate as in Example 1 except that the content of acrinatrin in the chemical conversion treatment liquid was changed to 1.0 part by mass, and the content of acrinathrin with respect to 100 parts by mass of the aminosilane coupling agent was changed to 50.0 parts by mass. Got.

Example 4
A stainless steel plate was obtained in the same manner as in Example 2 except that the dry coating amount of the chemical conversion solution was changed to 0.10 g / m ² .

(Example 5)
A stainless steel plate was obtained in the same manner as in Example 2 except that the dry coating amount of the chemical conversion solution was changed to 0.13 g / m ² .

(Example 6)
A stainless steel plate was obtained in the same manner as in Example 2 except that the dry coating amount of the chemical conversion solution was changed to 0.21 g / m ² .

(Example 7)
A stainless steel plate was obtained in the same manner as in Example 2 except that the dry coating amount of the chemical conversion solution was changed to 0.24 g / m ² .

(Example 8)
A stainless steel plate was obtained in the same manner as in Example 2 except that the dry coating amount of the chemical conversion solution was changed to 0.30 g / m ² .

(Comparative Example 1)
A stainless steel plate as in Example 1 except that the content of acrinatrin in the chemical conversion solution was changed to 0.1 parts by mass and the content of acrinathrin with respect to 100 parts by mass of the aminosilane coupling agent was changed to 5.0 parts by mass. Got.

(Comparative Example 2)
The content of acrinatrin in the chemical conversion treatment liquid is changed to 0.5 parts by mass, the content of acrinathrine with respect to 100 parts by mass of the aminosilane coupling agent is 25.0 parts by mass, and the dry coating amount of the chemical conversion treatment liquid is set to 0. A stainless steel plate was obtained in the same manner as in Example 1 except that the amount was changed to 08 g / m ² .

<Evaluation>
About the obtained stainless steel plate, pest repellent property was measured as follows. The results are shown in Tables 1 and 2.

-Pest repellency Pest repellency was evaluated by the following method.
First, as shown in FIG. 1, a regular rectangular column 12 having a length of 5 mm and a length of 40 mm is attached to one side of a square plywood plate 11 having a length of 70 mm and a width of 70 mm along each side of the surface. A cover 10 was produced. Next, as shown in FIG. 2, the test cover 10 was attached on a test plate 20 a made of a stainless steel plate manufactured in each example, and the test body 1 was manufactured.
In addition, the test cover 10 is attached on the stainless steel plate original plate (stainless steel plate SUS430 / No. 4 polished finish material manufactured by Nippon Steel & Sumikin Stainless Steel Co., Ltd.) 20b used in each example, and the test specimen 2 for comparison is used. Was made.
As shown in FIG. 3, the test body 1 and the comparative test body 2 were placed inside the box 3, and water 4 and bait 5 were placed between the test body 1 and the comparative test body 2. Thereafter, 20 adult German cockroaches were placed in the box 3 and left for 24 hours. After leaving, the test cover 10 of the test body 1 and the comparative test body 2 was removed, and the number of German cockroaches existing in the test body 1 and the number of German cockroaches existing in the comparative test body 2 were counted. Based on this number, the pest repellent rate was calculated by the following formula (1).
The same test was performed 6 times on the stainless steel plate of each example, and the pest repellent rate was obtained in each test. The average value of the obtained pest repellent rate was calculated, and the average value was defined as the pest repellent rate of the stainless steel plate. Tables 1 and 2 show pest repellent rates (average values of pest repellent rates in six tests) of this stainless steel plate. The degree of repellent effect was evaluated by the pest repellent rate of the stainless steel plate.
Because cockroaches prefer dark and narrow places, they usually enter the gaps formed under the test cover, but the cockroaches refrain from pest repellent if the board installed under the test cover is pest repellent. It becomes like this. Therefore, the higher the pest repellent property of the stainless steel plate in the test body, the more likely cockroaches are gathered inside the comparative test body that does not have the pest repellent property. Therefore, pest repellent can be evaluated by comparing the number of German cockroaches present in the test specimen 1 with the number of German cockroaches present in the comparative test specimen 2.
Pest repellent rate (%) = (1- [number of German cockroaches present in the test body) / [number of German cockroaches present in the test specimen for comparison]) × 100 (1)
Pest repellent 80% or more: Pass, 90% or more is particularly excellent.
Pest repellent less than 80%: Fail

Implementation in which the content ratio of the pest repellent to 100 parts by mass of the silane coupling agent is 10 to 50 parts by mass, and the dry coating amount (adhesion amount of the chemical conversion layer) of the chemical conversion solution is 0.10 g / m ² or more The stainless steel plates of Examples 1 to 8 were excellent in pest repellent properties.
The stainless steel plate of Comparative Example 1 in which the content ratio of the pest repellent to 100 parts by mass of the silane coupling agent was less than 10 parts by mass was low in pest repellent.
The stainless steel plate of Comparative Example 2 in which the dry coating amount of the chemical conversion solution (adhesion amount of the chemical conversion layer) was less than 0.10 g / m ² had low insect repellency.

  The pest repellent stainless steel sheet of the present invention has high pest repellent properties and can be manufactured at low cost. For this reason, the pest repellent stainless steel plate of the present invention can be suitably applied as a material for household appliances that require countermeasures against pests.

Claims (2)

A stainless steel plate, and a chemical conversion treatment layer provided on at least one surface of the stainless steel plate,
The chemical conversion treatment layer contains a pest repellent containing a synthetic pyrethroid compound and a silane coupling agent,
The pest repellent stainless steel, wherein the content ratio of the pest repellent to 10 parts by mass of the silane coupling agent is 10 to 50 parts by mass, and the amount of the chemical conversion treatment layer is 0.10 g / m ² or more. steel sheet. Applying a chemical conversion treatment liquid to at least one surface of the stainless steel plate, and drying to form a chemical conversion treatment layer,
The chemical conversion treatment solution contains a pest repellent containing a synthetic pyrethroid compound, a silane coupling agent, and a solvent, and the content ratio of the pest repellent with respect to 100 parts by mass of the silane coupling agent is 10 to 50. Mass part,
A method for producing a pest repellent stainless steel sheet, wherein the dry coating amount of the chemical conversion solution is 0.10 g / m ² or more.

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