KR100553007B1 - Composition for Wood Preservation - Google Patents

Abstract

The present invention relates to a new wood preservative with high resistance to both fungi that rot wood and surface contamination of wood or microorganisms that discolor wood.

The wood preservatives are environmentally friendly, have a very simple manufacturing process, and have the excellent preservative and anti-fog function of wood.

Wood preservatives, wood preservatives, preservatives, copper, alkylammonium compounds (ACQ)

Description

Composition for Wood Preservation for Wood Preservation and Preservation             

1 to 3 is a photograph showing the growth inhibition of wood fungi by the wood preservative composition according to the present invention.

4 and 5 are photographs showing wood color bacterial growth inhibition by the wood preservative composition according to the present invention.

The present invention relates to a new wood preservative with high resistance to both fungi that rot wood and surface contamination of wood or microorganisms that discolor wood.

Wood is used for various purposes due to the naturalness of the material, ease of processing, beauty, friendliness, and the like. However, due to the limitation that wood is a natural material, the wood is decayed over time, the strength is reduced, or the surface is deteriorated and discolored due to the growth of bacteria on the surface of the wood, the quality is degraded. Accordingly, attempts have been made to obtain the antiseptic and aesthetic effect of wood in various ways.

CCA-based wood preservatives, which are currently used industrially, contain arsenic, which is a heavy metal which is low in price but very dangerous for the human body, and its use is gradually limited. In addition, ACQ-based wood preservatives are common to poisons and poisonous treatments, but the price is very expensive, it is difficult to use them universally.

Previously invented copper compound-based wood preservatives are alkaline wood preservatives formed by dissolving a water-insoluble copper salt or copper oxide. While preservatives of this type contain isothiazolones, there is a property in that surfactants cannot be used. Conventionally, such wood preservatives have a disadvantage of low economical efficiency because of the high price of isothiazolone, a material, and poor adhesion performance when applied to wood because no surfactant is included.

Therefore, there is a demand for the development of a new type of wood preservative, which is inexpensive and easy to obtain, and the manufacturing process is simple and the preservation and aesthetic effect of wood is not only excellent, but also the fixing performance is excellent when the wood is applied.

An object of the present invention is to solve the problems of the prior art, to provide a new wood preservative composition having a high resistance to the microorganisms to disinfect the surface of the fungus and wood discoloration, which directly decay wood.                         

Another object of the present invention is to provide a new wood preservative composition excellent in wood permeability and adhesion.

The present invention for achieving the above object, 5 to 12.5% by weight of the quaternary ammonium compound, 5 to 12.5% by weight of water soluble copper compound, 0.5 to 2% by weight of zinc ion It relates to an alkaline wood preservative composition composed of a water-insoluble zinc compound, 20 to 40% by weight of an alcohol amine and a solvent as the remainder.

In the present invention, the "wood preservative" means a formulation that imparts a "preservative" and "coldness" effect to wood. "Preservative" means the effect of suppressing the fungi of wood. Wood fungi include brown fungi that degrade cellulose, white fungi that degrade lignin, and soft fungi that differ slightly from these. Unlike surface contaminants, these fungi accompany the strength of wood of any kind. In the present invention, the term "defense" refers to the effect of inhibiting the growth of microorganisms that mainly cause surface contamination of wood, that is, color change of the surface of wood. Surface contaminants, depending on the type of surface contamination by bars, these surface contaminants representing different colors Aspergillus seusok (Aspergillus: black), Rizzo crispus in (Rhizopus: black), Fusarium genus (Fusarium: Red, Purple) there may be mentioned microorganisms (orange Monilia) global Cloud Stadium in (Glocladium:: green), in Trichoderma (Trichoderma green), in monilriah. Because surface contaminants of wood do not degrade cellulose, a component of the wood cell walls, they do not involve changes in the strength of wood, but contaminating the surface of wood significantly lowers the aesthetic and commodity value of wood.

The present invention has been completed as a result of focusing on the development of wood preservatives having both antiseptic and antiseptic function of wood.

In the present invention, the quaternary ammonium compound, copper ions and zinc ions have a bactericidal activity against fungi, and alcohol amines have an effect of increasing the solubility of the copper compound and the zinc compound. In the present invention, the solvent may be water or an organic solvent, if necessary. In each component, the wood preservation effect is insignificant when less than the set content ratio, and more than the set content ratio, the economic efficiency is lowered, but rather the effect is reduced.

On the other hand, in the present invention, in order to increase the anti-foaming effect of the preservative, Iodopropynyl Butylcarbamate (hereinafter referred to as "IPBC") and 2- (4-thiazolyl) -benzimidazole (hereinafter referred to as "TBZ") may each contain 1 to 100,000 ppm. Can be. Preferably each of these is contained 10 to 10,000 ppm. These compounds have bactericidal activity, particularly against bacteria that grow on the surface of wood.

In the present invention, the quaternary ammonium compound is preferably alkyl dimethyl benzyl ammonium chloride. In addition, the water-soluble copper compound is preferably inexpensive and easy to obtain copper sulfate or copper chloride. In the present invention, the water-insoluble zinc compound is preferably zinc oxide, zinc sulfate or zinc carbonate, and the alcohol amines are preferably mono ethanolamine, diethanolamine or triethanolamine.

The wood preservative composition according to the present invention has the advantage that the components are nontoxic and inexpensive, and the manufacturing process is very simple. Since the composition according to the present invention is prepared through the reaction at room temperature and atmospheric pressure, the equipment cost is low, and the reaction time is short, so that the product can be produced in large quantities through a small reactor. The wood preservative composition of the present invention can be prepared by a simple method as follows.

It can be obtained by first mixing a predetermined amount of quaternary ammonium compound, water and alcohol amine, and then slowly adding and stirring the water-soluble copper compound and zinc compound. If necessary, add an appropriate amount of IPBC and TBZ while stirring.

The prepared alkaline wood preservative composition according to the present invention has a pH of about 9 to 12, and means an active ingredient in the composition (a component which can actually eliminate wood decay or color bacteria in the solution, where copper sulfate, alkylammonium, IPBC, TBZ, etc.) concentration is 10 to 20% by weight. The wood preservative composition of the present invention may be diluted with water or organic solvent or water and organic solvent mixture and then applied to the wood to be treated, coalesced into the wood by dipping or soaked under suitable pressure application means.

Hereinafter, the present invention will be described in more detail with reference to Examples and Application Examples. The following examples are merely illustrative for the purpose of describing the present invention, and thus the scope of the technical spirit of the present invention is not changed or reduced. In addition, it will be apparent to those skilled in the art that the wood preservative composition according to the present invention may be obtained by using a content ratio or a manufacturing method different from the content ratio or manufacturing method shown in the following examples.

As can be seen from the table, in the case of TYP bacteria, ACQ products had an effect of inhibiting fungal growth up to 2,000-fold dilution, but the composition according to the present invention showed an effect of inhibiting fungal growth even at a much lower concentration of 5,000-fold dilution medium. It was.

In addition, in the case of TRV bacteria, ACQ products had an effect of inhibiting fungal growth in a 10,000-fold dilution medium, but the composition according to the present invention showed an effect of inhibiting fungal growth in a much lower concentration of 20,000-fold dilution medium.

Therefore, it was confirmed that the wood preservative composition according to the present invention showed much better antiseptic performance than the products used in the prior art.

Microbial growth after culture is shown in Figure 1 ( TYP bacteria) and Figure 2 ( TRV bacteria).

(2) Forced swelling tests were conducted to analyze the extent to which the compositions according to the invention prepared in Example (1) directly reduced the swelling of wood.

As an experiment to examine the preservative effect, the test wood from the cedar (crytomeria japonica) sapwood was used in accordance with the preservative efficacy test method of KS M 1701, 1997 wood preservative. In order to investigate the preservative performance of wood-treated fungi of pharmaceutical treated wood, brown rot fungi (TYP: Tyromyces palustris ), which are defined in KS M 1701, 1997 preservative efficacy test method of wood preservatives, White mushroom, cloud mushroom (TRV: Trametes versicolor ) was used as the test bacteria.

After the forced swelling test for 3 months, the specimens were taken out and photographed of the microorganisms (Fig. 3). Then, the hyphae adhered to the surface of the specimens were removed, and dried in a dryer at a temperature of 60 ° C. for 48 hours. Tables 3 to 5 show. Table 3 shows the weight loss rate of the untreated group, and Table 4 and Table 5 show the weight loss rate of the test group inoculated with TVP and TRV bacteria after the treatment (elution method, cosmetic desorption method) according to the present invention.

Assuming that the preservative contained in the wood may be washed by rainwater or the like in the actual state even after the preservative is immersed in the wood or sprayed under pressure, in this application example, the group that simply treated the preservative (desorption), After the preservative treatment, the treated wood was immersed in water for 10 days and then divided into dry groups (solvents).

As can be seen from the table, when the wood preservative composition according to the present invention is treated, even though the leaching process, the weight loss of the copper during the test is almost not seen that there is a high antiseptic effect.

Forced post-test results are shown in FIG.

Application Example 2 Analysis of Wood Effect Effect of the Composition According to the Present Invention

(1) The effect of the wood preservative composition of the present invention prepared in Example (2) on the growth of microorganisms causing color change of wood was investigated.

As an experiment to examine the anti-foaming effect, the test wood according to the preservation effect test method of the wood preservative of the Japan Preservation Association Standard No. 2 was used. Five species, including Penicillium citrinum (PEC), Aspergillus niger (ASN), Aureobasidium pullulans (AUP), Chaetomium globosum (CHG), and Rhizopus nigricans (RHN) were used.

A solution of PDA (Potato dextrose Agar) was prepared, cooled to 50 ° C., and the composition according to Example (2) was diluted at a predetermined ratio to prepare a solid medium. Inoculating the test bacteria in the medium and incubated at room temperature for 3-7 days to observe the growth of microorganisms and the results are shown in Table 6 and Figures 4 and 5. In the table,-indicates no microbial growth, ± indicates minimal microbial growth, and + indicates viable microbial growth.

As can be seen in the table and figure, it can be seen that the wood preservative composition according to the present invention inhibits the growth of microorganisms that induce color change of wood at relatively low concentrations.

(2) Experiment in accordance with the test method for the taste of wood flavoring agent of the Japan Wood Conservation Association Standard No. 2 to analyze the degree to which the composition according to the present invention prepared in Example (2) directly reduces the color change of wood Was performed. The fungi mentioned in the above (1) were used as test bacteria.

After incubation, the growth of the cells was examined according to the same criteria as in Table 7, and the results of the experiment are shown in Table 8.

As shown in Table 8, it was confirmed that the wood preservative composition according to the present invention can effectively inhibit the growth of microorganisms that cause color change of wood even at very low concentrations.

The wood preservative composition of the present invention has an excellent effect against the microorganisms that stain and discolor the fungi and the surface to directly thicken wood. In other words, the antiseptic performance as well as the antiseptic performance is excellent. At present, the domestically sold ACQ is imported in its entirety and the price is high because it comes in liquid form.

The wood preservative of the present invention has the advantage of better performance than the imported ACQ and improved the anti-fog performance by the addition of organic compounds, it can be lowered to less than half in terms of price.                     

In addition, the present invention is a simple manufacturing process, because the reaction occurs at room temperature, atmospheric pressure, the equipment cost is low and the reaction time is very short.

Claims (6)

5 to 12.5% by weight of quaternary ammonium compounds, 5 to 12.5% by weight of copper ions, water-soluble copper compounds, 0.5 to 2% by weight of water-insoluble zinc compounds, 20 to 40% by weight The alkaline wood preservative composition comprised from the alcohol amine and the solvent as remainder. The method of claim 1, An alkaline wood preservative composition containing 1 to 100,000 ppm of IPBC and 2- (4-thiazolyl) -benzimidazole, respectively. The method according to claim 1 or 2, Wherein said quaternary ammonium compound is alkyl dimethyl benzyl ammonium chloride. The method according to claim 1 or 2, The water-soluble copper compound is an alkaline wood preservative composition, characterized in that the copper sulfate or copper chloride. The method according to claim 1 or 2, The water-insoluble zinc compound is an alkaline wood preservative composition, characterized in that zinc oxide, zinc sulfate or zinc carbonate. The method according to claim 1 or 2, The alcohol amines are mono ethanolamine, diethanolamine or triethanolamine, the alkaline wood preservative composition, characterized in that.

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