JP2009023258A - Lumber mildew-proof composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lumber mildew-proof composition solving working efficiency, metal corrosiveness, mildew-proof property, and cost effectiveness as a lumber mildew-proof composition used in combination with a water soluble decay-proof ant-proof agent for lumber pressure impregnation composed of a copper salt or copper oxide as a principal component. <P>SOLUTION: The lumber mildew-proof composition containing, as effective components, 2-n-octyl-4-isothiazoline-3-one and alkyl dimethyl ammonium compound having 8-18C alkyl groups is used in combination with the diluted solution of the decay-proof ant-proof agent for lumber pressure impregnation composed of the copper salt or the copper oxide as the principal component. By this combined use, the mildew-proof property is remarkably improved without impairing the decay-proof property and ant-proof property when these compositions are combined rather than when these are added alone and the mildew-proof performance can be maintained for a long period of time, and further, metal corrosiveness is reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a wood fender composition used to prevent the occurrence of wrinkles on wood. Wood antibacterial composition used in combination with water-soluble preservative ant for water-based wood pressure injection mainly composed of copper salt or copper oxide to protect wood used especially as building and outdoor parts from decay and insect damage The present invention relates to a wood antifungal composition capable of maintaining antifungal performance over a long period of time without impairing antiseptic and antproof properties.

Wood materials used for building materials, plywood, etc. are pressure-injected with antiseptic, ant-proofing agents and insecticides into wood to prevent decay and damage caused by insects such as termites. ing. For such antiseptics and anticides, chemicals containing aqueous copper, arsenic and chromium, such as CCA, have been used, but they contain heavy metals that are highly toxic and are harmful to human livestock. There is a risk of polluting the environment. In recent years, copper salt or copper oxide and triazole-based antiseptic compounds, copper salt or copper oxide and quaternary ammonium compounds (Patent Documents 1 and 2) have been used as antiseptic and antifungal agents to protect highly safe wood instead of CCA. The water-soluble preservative antiseptic for wood injection is 10 to 50 times diluted with water and injected into the wood under pressure. The injection amount is as large as 200 to 500 kg / m ^3, and there is a problem that wrinkles are generated before the wood is dried and the commercial value is remarkably lowered. In order to prevent this, a mildew-proofing agent is added to the diluted solution of the above-mentioned water-soluble wood pressure-injecting antiseptic / preservative and pressure-injected.

Many antifungal agents for wood have been commercialized, but the physical properties of the above water-soluble preservatives for wood pressure injection, that is, the preservative component contains a metal salt, water insoluble copper salt or oxidation Since copper is dissolved in water with ammonia, ammonium salt or amines and its liquidity is alkaline, most commercially available antifungal agents do not dissolve, do not disperse, and do not exhibit long-term antifungal performance. .

Accordingly, isothiazoline compounds having a high initial antifungal effect have been used and proposed. (Patent Documents 1, 3, and 4) However, isothiazolone compounds containing a halogen element such as 4-chloro-2-methylisothiazoline-3-one and 4,5-dichloro-2-octyl-4-isothiazoline-3- When ON is used, it is difficult to use it at high concentration because it is corrosive to metal and has problems such as damage to the pressure pouring pot, pump, piping, and other devices, and skin irritation. And the biggest problem is that when the water-soluble wood preservative preservative for alkali injection is alkaline, the isothiazolone compound containing halogen element decomposes and the concentration decreases rapidly, so daily process control (concentration control) Is very complicated, and it is necessary to add a new isothiazolone compound containing a halogen element in order to maintain the concentration.

JP-A-10-249810 JP 2003-252705 A JP 2001-47408 A JP 2001-150404 A

The present invention relates to a wood fender composition used to prevent the occurrence of wrinkles on wood, which is a problem of the prior art, and in particular, is a water-soluble wood additive mainly composed of a copper salt or copper oxide. It is an object of the present invention to provide a wood antibacterial composition with improved workability, metal corrosiveness, antifungal property and economy as a wood antibacterial composition used in combination with a preservative antifungal agent for pressure injection.

As a result of earnest research on the wood antiseptic and antiseptic composition, the present inventor has obtained 2-n-octyl-4-isothiazolin-3-one (hereinafter abbreviated as OIT) as an active ingredient and an alkyl group having 8 to 18 carbon atoms. When an antifungal composition containing a dialkyldimethylammonium compound having an active ingredient as an active ingredient is used in combination with a dilute solution of a water-soluble pressurizing preservative for water-based wood based on copper salt or copper oxide, The present inventors have found that the cocoon effect and the anti-corrosion effect can be maintained over a long period of time, and that the workability is good and the metal is not corrosive, leading to the present invention.

The dialkyldimethylammonium compounds having an OIT and an alkyl group having 8 to 18 carbon atoms, which are active ingredients of the wood antifungal composition of the present invention, are widely used as antiseptics and antifungal agents. However, when it contains an OIT and a dialkyldimethylammonium compound having an alkyl group having 8 to 18 carbon atoms as an active ingredient, rather than adding each independently to a dilute solution of a water-soluble wood pressure-injecting antiseptic and antifungal agent, The present inventors have found that the fouling performance is drastically improved and that the fouling performance is maintained for a long time without impairing the antiseptic and ant-proof properties. In addition, compared with conventionally used and proposed isothiazolone compounds containing a halogen element, the metal oxide is less corrosive, and the biggest disadvantage is the decomposition of the dialkyldimethyl having an OIT of the present invention and an alkyl group having 8 to 18 carbon atoms. A mixture containing an ammonium compound as an active ingredient has almost no decomposition and is excellent in workability and economy.

（Ｒ１とＲ２は同じかあるいは異なり、炭素数８〜１８のアルキル基を示す。Ｘ−は対イオンを示す）で表される。対イオンは、ハロゲンイオン、硫酸イオン、リン酸イオン、有機酸イオン等が挙げられるが、塩素イオンが好ましい。これらのジアルキルジメチルアンモニウム化合物であればいずれの化合物でも使用することができるが、ジデシルジメチルアンモニウムクロライド（以下ＤＤＡＣと略す）が好ましく、特に銅塩又は酸化銅を主成分とする水溶性木材加圧注入用防腐防蟻剤の希釈液中での防黴性においてＯＩＴとの相乗的効果が期待できる。 The dialkyldimethylammonium compound having an alkyl group having 8 to 18 carbon atoms in the present invention has the general formula (1)

(R1 and R2 are the same or different and each represents an alkyl group having 8 to 18 carbon atoms. X- represents a counter ion). Examples of the counter ion include a halogen ion, a sulfate ion, a phosphate ion, and an organic acid ion, and a chlorine ion is preferable. Any compound can be used as long as it is a dialkyldimethylammonium compound, but didecyldimethylammonium chloride (hereinafter abbreviated as DDAC) is preferable, and water-soluble wood pressurizing mainly containing a copper salt or copper oxide as a main component. A synergistic effect with OIT can be expected in the antifungal property in the diluted solution of the antiseptic and antifungal agent for injection.

OIT which is an active ingredient of the wood antifungal composition of the present invention and an alkyl group having 8 to 18 carbon atoms are added to a dilute solution of a water-soluble wood preservative antiseptic agent mainly composed of copper salt or copper oxide. The mixing ratio in the case of adding the dialkyldimethylammonium compound is 1:49 to 49: 1, more preferably 1:19 to 19: 1 by weight. If the mixing ratio is other than this, a synergistic effect cannot be obtained in the antifungal property, so that the amount added to the diluting solution increases, which is disadvantageous in terms of economy.

In addition, preservative for pressure injection of water-soluble wood mainly composed of a copper salt or a copper oxide as a main component of a dialkyldimethylammonium compound having an OIT and an alkyl group having 8 to 18 carbon atoms as an active ingredient of the wood antifungal composition of the present invention There are no particular restrictions on the form of addition to the dilute solution of the termite preventive, but examples include solubilizers and emulsions.

When used as a solubilizer, various solvents that can dissolve OIT and a dialkyldimethylammonium compound having an alkyl group having 8 to 18 carbon atoms, such as alcohols, glycols, glycol ethers, both of which are hydrophilic solvents Used in water, ketones and water. Furthermore, you may add a nonionic and / or anionic surfactant as needed.

When used as an emulsion, various solvents that can dissolve OIT and a dialkyldimethylammonium compound having an alkyl group having 8 to 18 carbon atoms, such as aliphatic hydrocarbons and aromatic carbonization, both of which are hydrophobic solvents, are used. Those dissolved in hydrogen, esters or the like are used. Furthermore, you may add a nonionic and / or anionic surfactant as needed.

Commercially available products that are commonly used as preservatives for water-soluble pressure-injecting water-soluble wood based on copper salts or copper oxides can be used. For example, Maitrek ACQ (manufactured by Kosipu Leatherbing Co., Ltd.) ), Tanaris CY (manufactured by Coppers Arch Chemical Co., Ltd.) and the like. When adding this invention composition to these dilution liquids, it adds in 50-1000 ppm as a sum total of OIT and the dialkyl dimethyl ammonium compound which has a C8-C18 alkyl group. At concentrations below this range, the antifungal effect is not fully exhibited, and at concentrations above this range, it is disadvantageous in terms of economy.

Next, although an example and a comparative example of the present invention are given and explained, the present invention is not limited to these. Table 1 shows the composition of the compositions of Examples and Comparative Examples. In addition, the numerical value of a mixing | blending is weight%.

＊１：４−クロロ−２−メチルイソチアゾリン−３−オン
＊２：４，５−ジクロロ−２−オクチル−４−イソチアゾリン−３−オン
＊３：ジエチレングリコールモノブチルエーテル
＊４：ポリオキシアルキレンアルキルエーテル

* 1: 4-chloro-2-methylisothiazolin-3-one * 2: 4,5-dichloro-2-octyl-4-isothiazolin-3-one * 3: diethylene glycol monobutyl ether * 4: polyoxyalkylene alkyl ether

Test Example 1 and Test Example 2 show the wood decompression injection processing method.
(Test Example 1) Reduced pressure injection treatment 1 to wood
A preservative antiseptic for wood pressure injection (trade name: Tanaris CY Coopers Arch Chemical Co., Ltd.) containing copper oxide and a triazole-based antiseptic compound as a component was diluted 40 times with water, and this was adjusted to a predetermined concentration in Example 1. -3 and Comparative Examples 1-4 were added under reduced pressure to wood (Batesga: 4 × 7 × 1 cm). These diluted solutions were also injected under reduced pressure when left at room temperature for one month. The amount of diluent injected at this time was 250 kg / m ³ or more with respect to the wood.

(Test Example 2) Reduced pressure injection treatment 2 to wood
Anti-corrosive ant for pressure injection of wood containing copper salt and quaternary ammonium compound (trade name: Maitrek ACQ Co., Ltd., manufactured by Koshiipu Reabing Co., Ltd.) diluted 25 times with water The diluted solutions to which the Examples 1 to 3 and the Comparative Examples 1 to 4 were added were injected into wood (Batesga: 4 × 7 × 1 cm) under reduced pressure. These diluted solutions were also injected under reduced pressure when left at room temperature for one month. The amount of diluent injected at this time was 250 kg / m ³ or more with respect to the wood.

The wood protection test method is shown in Test Example 3.
(Test Example 3) Wood fouling test The test pieces injected under reduced pressure in Test Examples 1 and 2 were allowed to stand overnight and then subjected to a wood fouling test. This test piece was placed on a potato dextrose agar plate, sprinkled with 1 ml of a spore mixed spore suspension, cultured at a temperature of 28 ° C. and a humidity of 95% for 30 days, and observed every 14 days. Examples of the test bacteria include Aspergillus niger, Cladosporium cladosporoides, Penicillium funiculosum, Aureobasidium pullulans, Gliocladium virens, Fusarium sp. Was used. The results are shown in Tables 2 and 3. However, the display of the degree of pupal growth is based on the following judgment.

−: No growth of wrinkles on the specimen.
+: Growth of wrinkles is seen on the side of the test piece.
++: The growth area of wrinkles on the test piece is less than 1/3 of the total area.
+++: The growth area of wrinkles on the test piece is 1/3 or more of the total area.

Table 2 shows the results of the antifouling test of the test piece subjected to the vacuum injection treatment in Test Example 1.

Table 3 shows the results of the antifouling test of the test piece subjected to the vacuum injection treatment in Test Example 2.

From Table 2 and Table 3, the composition of Examples 1-7 of this invention showed the very favorable antifungal effect compared with Comparative Examples 1-3. Further, Comparative Example 4 had a good antifungal effect immediately after the treatment, but the antifouling effect was remarkably reduced when the diluent was poured after being left for 30 days.

Test Example 3: Iron Corrosion Test A solution obtained by diluting 40 times with a water antiseptic ant for pressure injection of wood (trade name: Tanaris CY Copers Arch Chemical Co., Ltd.) containing copper oxide and a triazole-based antiseptic compound as components. (Pressure treatment 1 liquid) and antiseptic ant for pressure injection of wood (trade name: Maitrek ACQ, manufactured by Koshii Rezabing Co., Ltd.) with water containing copper salt and quaternary ammonium compound as components 0.2% of the compositions of Example 2, Comparative Example 3 and Comparative Example 4 were added to a 25-fold diluted solution (pressure treatment 2 liquids). Polished iron pieces (25 × 25 × 2 mm) were put in these diluted solutions, and left at room temperature for 1 month to observe iron corrosivity. The results are shown in Table 4.

From Table 4, the compositions of Examples 5 and 6 of the present invention are not corrosive to iron, and no change is observed in the diluted solution. The composition of Comparative Example 4 was found to be iron corrosive, and the diluent also had a tendency to discolor.

The wood antibacterial composition of the present invention exhibits excellent antifungal performance, and in particular, the wood antifungal of the present invention in a dilute solution of a water-soluble preservative antiseptic agent for pressurization of water based on copper salt or copper oxide. Excellent antifungal properties are obtained when the composition is added and wood is treated. And since it is a wood protection composition that can maintain the protection performance for a long period of time without impairing the antiseptic and ant protection properties, it is not necessary to add a new wood protection composition and it is economical. Compared to conventional and proposed antifungal agents, the pressure injection device is less corrosive.

Claims (3)

Wood antifungal composition comprising 2-n-octyl-4-isothiazolin-3-one and a dialkyldimethylammonium compound having an alkyl group having 8 to 18 carbon atoms as active ingredients The wood antifungal composition according to claim 1, wherein the dialkyldimethylammonium compound is didecyldimethylammonium chloride. The wood antifungal composition according to claim 1 or 2, for imparting antifungal performance by adding to a dilute solution of a water-soluble wood preservative antiseptic ant containing a copper salt or copper oxide as a main component