JPS5854642B2 - Wood preservative and insect repellent treatment agents and their usage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a preservative and insect repellent treatment agent suitable for wood, particularly plywood, and a method for preservative and insect repellent treatment of wood using the treatment agent. An object of the present invention is to provide an antiseptic and insect repellent treatment agent suitable for use by mixing it into a disinfectant, and a method for using the same.

In recent years, the odor of formaldehyde emitted from plywood and the like has become a problem, and as adhesives with low formaldehyde content have come into use, insect damage to plywood and the like by the Japanese yellow beetle has increased noticeably.

Additionally, as plywood has come to be used for the exterior and structural parts of houses, the durability of plywood has come to be required, and for this reason, plywood that has been pre-treated with antiseptic and/or insect repellent treatment has come to be used. Ta.

Conventionally, when treating wood with rot and insect repellents,
A method is used in which the wood used is sprayed or impregnated with antiseptic and insect repellent agents.

However, particularly when preservative and insect repellent treatment is applied to plywood, a so-called adhesive mixing method is generally employed in which plywood is manufactured using an adhesive mixed with a preservative and/or insect repellent.

The adhesive mixing method can easily produce rot- and insect-proof treated plywood using normal plywood factory equipment, so it does not require investment in new equipment. A large amount of emulsifier or solvent must be used to suspend the preservative and/or insect repellent in the adhesive liquid, which may significantly reduce the adhesive performance or add preservative and/or insect repellent to the adhesive layer. Alternatively, since the insect repellent is embedded, the amount of the agent that permeates into the wood and exhibits its effectiveness is reduced, resulting in problems such as the need to add an excessive amount of the preservative and/or insect repellent.

In order for preservatives and/or insect repellents to work effectively, it is necessary to increase the moisture content of the veneer used when manufacturing plywood, but using veneers with a high moisture content may reduce adhesive performance. becomes noticeable and cannot be put to practical use.

On the other hand, in order to obtain stable adhesive performance, it is necessary to keep the moisture content of the veneer at a low level during plywood production. The amount increases, and therefore an excessive amount of the drug must be added, resulting in huge economic losses.

Conventionally, countermeasures have been considered for such contradictory problems, but a satisfactory and effective solution has not yet been found.

As a result of extensive research into solutions to these problems, the present inventors have developed a solution that combines an insoluble or poorly soluble antiseptic and/or insect repellent with a phenolic compound having a hydroxyl group at the meta-position of the benzene ring. By adding and mixing the preservative and/or insect repellent mixed composition with a normal aldehyde resin adhesive, the effect of the preservative and/or insect repellent can be fully exerted without deteriorating the adhesive performance. The present invention was completed based on the discovery that this can be achieved.

That is, the present invention provides a preservative and insect repellent treatment agent comprising a preservative and/or insect repellent that is insoluble or poorly soluble in water, and a phenolic compound having a hydroxyl group at the meta-position of a benzene ring, and a treatment agent that comprises an aldehyde. This is a method for preservative and insect repellent treatment of wood mixed in resin adhesives.

The phenolic compound having a hydroxyl group at the meta position of the benzene ring used in the present invention can be very easily mixed with water-insoluble or poorly soluble preservatives and/or insect repellents, and a stable mixed state can be obtained. Not only that, but it also has the effect of improving adhesive performance.

If a water-insoluble or poorly soluble preservative and/or insect repellent is mixed into urea resin, melamine resin, phenolic resin, etc. that have traditionally been used as adhesives for plywood, phase separation will occur immediately and the adhesion will deteriorate. Performance is also reduced, and the effects of the present invention cannot be obtained at all.

The phenolic compounds having a hydroxyl group at the meta position of the benzene ring used in the present invention include resorcinol, alkylresoldial, tannin, etc. These compounds may be used alone or in combination of two or more. can.

Preservatives that are insoluble or sparingly soluble in water include organic tin compounds such as triethyltin acetate and tributyltin oxide, chlorophenols such as chlororthophenylphenol, chlornaphthalenes, naphthenic acid metal salts, nitrophenols, and creoletin compounds. In addition, insect repellents include organochlorine compounds such as chlordane, pebtachlor, dieldrin, chlornaphthalene, and pentachlorphenol, organophosphorus compounds such as parathion,
These include carbamate compounds, pyrethrins, etc.

These antiseptic and insect repellent agents can be used alone or in combination as needed, and can be used in their original form or with the addition of solvents such as alcohols, ketones, kerosene, etc., or with surfactants. Add and use.

The mixing ratio of the phenolic compound having a hydroxyl group at the meta position of the benzene ring and the antiseptic and/or insect repellent may be any ratio, but the phenolic compound 1
10 to 00 parts by weight of preservatives and/or insect repellents
It is preferable to mix about 500 parts by weight.

Further, although these two components are usually mixed in advance, they may also be mixed immediately before use.

The preservative and insect repellent treatment agent of the present invention comprising a water-insoluble or poorly soluble preservative and/or insect repellent and a phenolic compound having a hydroxyl group at the meta-position of a benzene ring is generally used for bonding plywood, etc. By mixing it with aldehyde-based resin adhesives, wood can be treated to prevent rot and insects.

That is, the preservative and insect repellent treatment agent of the present invention is a co-condensate or a mixture of one or more of urea resin, melamine resin, phenol resin, etc., or a co-condensate or mixture of these resins and polyester resin during the production of plywood. A conventionally known aldehyde resin adhesive such as a modified product or a mixture with a thermoplastic resin such as vinyl acetate, polyvinyl alcohol, 5BR1NBR, etc., or a predetermined filler, water, curing agent, etc. to the adhesive as necessary. It is used by adding only the required amount to the glue solution mixed in the proportions.

The amount added varies depending on the thickness and structure of the plywood to be manufactured, the amount of application, etc., but the amount of Q, 5 to 30
% is appropriate.

The antiseptic and insect repellent treatment agent of the present invention can impart excellent antiseptic and insect repellent effects to wood using the adhesive by simply mixing it into an aldehyde resin adhesive.
In addition, aldehydes such as formaldehyde, acetaldehyde, glyoxal, N-butyraldehyde, acrolein, furfural, etc., or aldehyde donors that decompose to produce aldehydes such as paraformaldehyde, hexamethylenetetramine, α-polyoxymethylene, etc. The effect can be further improved by adding one or more of them.

Furthermore, the effect can be similarly improved by using an aldehyde resin adhesive containing about 1 to 10% of free aldehyde into which the antiseptic and insect repellent treatment agent of the present invention is mixed. be able to.

In this case, since the phenolic compound contained in the antiseptic and insect repellent treatment agent of the present invention effectively combines with the free aldehyde in the adhesive, the antiseptic and insect repellent treated plywood manufactured using the adhesive The amount of aldehyde released from the gas is extremely small.

If the preservative and insect repellent treatment agent of the present invention is used according to the method of the present invention, stable adhesive performance can be obtained even when bonding veneers with high moisture content, so that the preservative and/or insect repellent can penetrate into the wood. Good antiseptic and insect repellent effects can be obtained without using excessive amounts of chemicals.

Therefore, it becomes possible to economically produce rot- and insect-proofed plywood of stable quality.

Examples of the present invention will be shown below, and the effects thereof will be explained.

I8
:l■Example 1 A mixed solution of 30 parts of sierre oil resorcinol whose main component is alkylresorcinol, chlordane, and an organic tin compound (manufactured by Yoshitomi Pharmaceutical Co., Ltd., insect repellent, preservative, TW
By thoroughly stirring and mixing 70 parts of Y-PWI 5C), a wood preservative and insect repellent treatment agent (product of the present invention) which does not separate even when left indoors for more than one month was obtained.

Commercially available melamine/urea resin adhesive (Honen Oil Co., Ltd., K
, ML-Q44) 100 parts, wheat flour (Nippon Seifun,
20 parts (manufactured by K., Akadatag), 9 parts of water, 0.5 parts of ammonium chloride powder, 15 parts of the above-mentioned product of the present invention, and 3 parts of paraformaldehyde were placed in an M glue mixer and stirred thoroughly.
An adhesive-containing size liquid was obtained.

This paste solution was applied to both sides of a lauan veneer with a thickness of 1.4 mm and a moisture content of 10% at a rate of 13 t/900 crl per side, and on both sides with a thickness of 0.7 mm and a moisture content of 14~ Each layer of 15% lauan veneer is stacked on top of each other and weighs 10 kg at room temperature.
After pressing at a pressure of /crA for 20 minutes, it was inserted into a hot press maintained at a temperature of 120°C and hot pressed at a pressure of 9 kg/crA for 1 minute.

After the plywood thus obtained was left indoors for one week, the adhesive strength was measured by repeated boiling according to the Japanese Agricultural Standards (JAS) test method.

At the same time, a test piece of plywood cut into 30 parts m x 30 mvt was placed on agar inoculated with Trichoderma viridi spores, cultured for 14 days at a temperature of 28°C, and the state of mold growth on the test piece was observed.

Also, for comparison, 100 parts of melamine/urea resin adhesive (manufactured by Hounen Seifun Co., Ltd., ML-044), 20 parts of wheat flour (K, M, Akafuda, made by Nippon Seifun Co., Ltd.), 9 parts of water, and ammonium chloride. Using a paste made by adding 0.5 part of powder and 10 parts of a mixed solution of chlordane and organotin compound (Yoshitomi Pharmaceutical Co., Ltd., antiseptic, insect repellent, TWY-PWI5C), under exactly the same conditions. A plywood was manufactured and similar tests were conducted on this plywood.

The results are shown in the table below.

As is clear from these results, if the antiseptic and insect repellent treatment agent of the present invention is used according to the method of the present invention, plywood with excellent antiseptic performance can be obtained without reducing the adhesive performance of plywood.

Example 2 50 parts of resorcinol and chlordane solution (to Shinto paint,
5W-7075) was mixed with 50 parts of Insect Repellent, 5W-7075) and thoroughly stirred to obtain a wood insect repellent treatment agent (product of the present invention) that does not separate even if left indoors for more than one month.

100 parts of melamine-urea resin adhesive with a free formaldehyde content of 2.2%, 20 parts of wheat flour, 9 parts of water, 0.5 part of ammonium chloride powder, and 4 parts of the above-mentioned product of the present invention may be added to a glue mixer. The mixture was stirred to obtain an adhesive-containing paste liquid.

Apply this glue to both sides of a lauan veneer with a thickness of 1.4 and a moisture content of 10% at a rate of 13 t/900 crA per side☆☆
0.7 mm thick, moisture content 14~ on both sides.
Layer each 15% lauan veneer together and heat at room temperature for 10 minutes.
After pressing for 20 minutes at a pressure of kg/crti, the temperature was 12
It was inserted into a hot press maintained at 0°C and hot pressed at a pressure of 9 kg/cA for 1 minute.

After the plywood thus obtained was left indoors for one week, the adhesive strength and the amount of chlordane extracted were measured by repeated boiling according to the Japanese Agricultural Standards (JAS) test method.

For comparison, 100 parts of the same melamine/urea resin adhesive, 20 parts of wheat flour, 9 parts of water, 0.5 part of ammonium chloride powder, and chlordane solution (K
Plywood was manufactured under exactly the same conditions using a sizing solution prepared by adding 2 parts of 5W-7075, an insect repellent manufactured by .

The results are shown in the table below.

As is clear from these results, if the insect repellent treatment agent of the present invention is used according to the method of the present invention, plywood with excellent insect repellent performance can be obtained without reducing the adhesive performance of the plywood.

Example 3 40 parts of sierre oil resorcinol, whose main component is alkylresorcinol, and 60 parts of chlordane solution (Yoshitomi Pharmaceutical Co., Ltd., K, insect repellent, VCA-P) were mixed, stirred thoroughly, and placed in a room. A wood insect repellent treatment agent (product of the present invention) which does not separate even after being left for more than a month was obtained.

Commercially available melamine/urea resin adhesive (Honen Oil Co., Ltd., K
, ML-044) 100 parts, wheat flour (Nippon Seifun,
20 parts of Aka-Fuda, manufactured by Akihabara Co., Ltd.), 9 parts of water, 0.5 parts of ammonium chloride powder, and 5 parts of the above-mentioned product of the present invention were put into a glue-making mixer (stirred to obtain a glue-containing glue solution).

Using this glue solution, plywood manufactured under the same conditions as Example 2 was left indoors for one week, and then the Japanese Agricultural Standards (JAS)
According to the test method, repeated boiling adhesive strength and chlordane extraction amount were measured.

For comparison, we used a sizing solution made by adding 100 parts of the same melamine/urea resin adhesive, 20 parts of wheat flour, 9 parts of water, 0.5 parts of ammonium chloride powder, and 3 parts of chlordane solution. Plywood was manufactured under the same conditions, and similar tests were conducted on this plywood.

The results are shown in the table below.

As is clear from these results, if the insect repellent treatment agent of the present invention is used according to the method of the present invention, plywood with excellent insect repellent performance can be obtained without reducing the adhesive performance of the plywood.

Claims (1)

[Scope of Claims] 1. A preservative and insect repellent treatment agent comprising a water-insoluble or poorly soluble preservative and/or insect repellent and a phenolic compound having a hydroxyl group at the meta-position of a benzene ring. 2. The antiseptic and insect repellent treatment agent according to claim 1, which is casieroyl isorcinol, a phenolic compound having a hydroxyl group at the meta position of the benzene ring. 3. A preservative and insect repellent treatment agent consisting of an insoluble or poorly soluble preservative and/or insect repellent and a phenolic compound having a hydroxyl group at the meta position of the benzene ring is mixed into the aldehyde resin adhesive. Wood preservative and insect repellent treatment method. 4. When mixing an antiseptic and insect repellent treatment agent consisting of a preservative and/or insect repellent that is insoluble or poorly soluble in water and a phenolic compound having a hydroxyl group at the meta position of the benzene ring into an aldehyde resin adhesive, aldehyde or aldehyde The method according to claim 3, wherein a donor is used or added. 5 Aldehyde resin adhesive containing 1 to 10% of a preservative and/or insect repellent that is insoluble or poorly soluble in water and a preservative and insect repellent treatment agent consisting of a phenolic compound having a hydroxyl group at the meta position of the benzene ring. 4. A method according to claim 3, containing free aldehyde.