JPS61148001A - Wood mothproofing agent - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は木材、特に南洋材の防虫剤に関するものである
。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an insect repellent for wood, particularly tropical wood.

従来の技術 最近、ラワン材等南洋材の防虫には木材にホウ素化合物
および７ツ嵩化合物の水溶液を加圧または減圧注入する
方法が広く用いられるようになってきた。BACKGROUND OF THE INVENTION Recently, a method of injecting an aqueous solution of a boron compound and a 7-bark compound into the wood under pressure or under reduced pressure has come to be widely used to prevent insects from tropical wood such as lauan wood.

これらの化合物は製材の日本農林規格で防虫剤として認
められており、その防虫作用は広く知られている。These compounds are recognized as insect repellents by the Japanese Agricultural Standards for lumber, and their insect repellent effects are widely known.

かかるホウ素系の薬剤としてはホウ砂とホウ酸の混合物
または８ホウ酸ナトリウム４水和物が広く使用されてい
る。その理由は安全性が高く、安価であって、水溶性で
ある・ので取扱いが簡単であり、さらに加圧処理装置に
対する腐蝕性がない等であるゆ 発明が解決しようとする問題点 しかしながら、ホウ砂とホウ酸の混合物、または８ホウ
酸ナトリウム４水和物で南洋材を加圧、防虫加工すると
辺材と心材の移行部に赤〜赤紫色の着色を起す材がある
。特にサバ産の白色系材に多発している。As such boron-based agents, mixtures of borax and boric acid or sodium octaborate tetrahydrate are widely used. The reasons for this are that it is highly safe, inexpensive, easy to handle as it is water soluble, and is not corrosive to pressure treatment equipment. When South Sea wood is pressurized and insect-proofed with a mixture of sand and boric acid or sodium octaborate tetrahydrate, the transition area between sapwood and heartwood becomes colored red to reddish-purple. It is particularly common in white wood from Sabah.

この青色は加工直後よりも乾燥途中から認められ、特に
日光に＠震されるとさらに着色度が増す、このため防虫
加工後の材の商品価値を低下させ問題となっている。This blue color is more noticeable during drying than immediately after processing, and the degree of coloring increases even more when exposed to sunlight, which is a problem and reduces the commercial value of wood after insect-proofing.

処理液のＰＨがアルカリ側で着色度が強く、空気１日光
によってさらに強制されることが確認された。It was confirmed that the degree of coloring was strong when the pH of the treatment solution was on the alkaline side, and that it was further forced by air and sunlight.

現在のところ着色する材を事前にチェックし選別する技
術も確立されていない。At present, there is no established technology to check and select materials to be colored in advance.

従って、防虫薬剤（処理液）が青色を防止する性能を持
たなければならなくなった。そこでホウ砂とホウ酸の配
合割合を変えるか、または酸性成分を添加することによ
り処理液のＰＨを下げることで着色度は軽減されるが、
完全でなく、さらにＰＨが中性以下にまで低下すると加
圧装贋が鉄製のため腐蝕を起す、と同時に処理液中に鉄
イオンが出てくるため、この鉄イオンと材中のタンニン
様物質とが反応する。従って＠理液が暗色化し、処理材
も黒く仕上る。Therefore, insect repellents (treatment liquids) must have the ability to prevent blue color. Therefore, the degree of coloring can be reduced by lowering the pH of the treatment solution by changing the blending ratio of borax and boric acid or by adding an acidic component.
If the pH is not perfect and the pH drops below neutrality, corrosion will occur because the pressurized equipment is made of iron, and at the same time iron ions will be released into the treatment solution, so these iron ions and tannin-like substances in the material will reacts. Therefore, @the liquid becomes dark in color, and the treated material is also finished black.

問題点を解決するための手段 前記の如き処理材の着色を防止するには次の方法が考え
られる。Means for Solving the Problems The following methods can be considered to prevent the coloring of treated materials as described above.

（イ）前処理を行うことにより着色を防止する。(b) Preventing coloring by performing pretreatment.

（ロ）後処理を行うことにより着色した材をきれいにす
る。(b) Clean colored materials by performing post-treatment.

Ｖ→処理液に着色防止剤を添加する。V→Add a coloring inhibitor to the processing solution.

に）薬剤に着色防止剤を混合しておく。2) Mix an anti-coloring agent with the drug.

しかしながら、（イ）、（ロ）の方法は２回の工程にな
り不利である。However, methods (a) and (b) are disadvantageous because they require two steps.

さらにイ１の方法では表面処理であり、後で加圧処理さ
れるため効果がなくなる、１０１の方法では一度変色し
た材にはかなり強い処理が必要である。また−梱包全部
が着色するわけではないため結束をほどく必要も生じる
。などの理由からρ場とに）の方法について検討した結
果、（ハ）の方法よりも口の方法の方がより簡易で経済
的であること、および着色防止剤として次の条件を満た
す必要があることがわかった。Furthermore, method A1 is a surface treatment and is no longer effective because it is subjected to pressure treatment afterwards, while method A1 requires a fairly strong treatment for materials once discolored. Also, since not all of the packaging is colored, it may be necessary to untie the packaging. As a result of considering the method (C) for the following reasons, we found that the method (C) is simpler and more economical than the method (C), and that the coloring preventive agent must satisfy the following conditions. I found out something.

圓）水溶性である。En) Water soluble.

（ｂｌホウ酸と併用できる。(Can be used in combination with bl boric acid.

１０１材を着色しない。101 Do not color the material.

（ｄ）安全性が高く、取扱いが容易である。(d) High safety and easy handling.

師）アルカリ性でありＰＨ調整に使える。Master) It is alkaline and can be used for pH adjustment.

（ｆ）鉄腐蝕を起さない。(f) Does not cause iron corrosion.

（２）処理材からのホウ酸の定量に影響しない。(2) Does not affect the quantitative determination of boric acid from treated materials.

（５）処理液中のホウ酸の濃度測定に影響しない。(5) Does not affect the concentration measurement of boric acid in the processing solution.

（１）安価である。(1) It is inexpensive.

本発明者らは前記の結果から防虫効果は勿論のこと、防
虫加工を行うことによる処理材の着色を防止しうる木材
防止剤について研究した結果、薬剤としてのホウ酸に着
色防止剤としてリン酸の塩類を併用することにより、防
虫効果に加えて処理材の着色を防止し、さらに加圧また
は減圧等の処理！４置の金、寓腐蝕も抑え、処理液の汚
損をも軽減できることを見い出した。Based on the above results, the present inventors researched wood inhibitors that not only have an insect repellent effect but also can prevent the discoloration of treated wood due to insect repellent treatment. By using salts in combination, in addition to the insect repellent effect, it prevents coloring of the treated material, and furthermore, it can be used for treatments such as pressurization or depressurization! It has been found that it can also suppress metal corrosion and reduce staining of the processing solution.

すなわち本発明の目的はホウ酸とリン酸の塩類とを主成
分として含む木材防虫材を提供することである。That is, an object of the present invention is to provide a wood insect repellent material containing boric acid and phosphoric acid salts as main components.

本発明に使用するホウ酸は白色の結晶性粉末で水にＷＩ
解すると弱い酸性を示す、辺材の、ＴＡＳの防虫処理で
は処理材の辺材中にホウ酸としてα３％以上含まれてい
ればとツクキクイムシに対する防虫効果が得られると規
定されている。Boric acid used in the present invention is a white crystalline powder that can be mixed with water.
In other words, in the TAS insect repellent treatment of sapwood, which exhibits weak acidity, it is stipulated that the insect repellent effect against the Japanese tree beetle can be obtained if the sapwood of the treated wood contains α3% or more as boric acid.

また本発明に使用するリン酸の塩類としてはリン酸２水
素ナトリウム、リン酸水素２ナトリウム、リン酸５ナト
リウム、リン酸２水素カリウム、リン酸水素２カリウム
、リン酸３カリウム、りン酸２水素アンモ＝ウム、りン
酸水素２アンモニウム、リン酸５アンモニウム、トリポ
リリン酸ナトリウム、ビロリン酸カリウム、ヘキサメタ
リン酸ナトリウム、ピロリン酸ナトリウムなどがあげら
れるが、特にアンモニウム塩類が特に好ましい。In addition, the phosphoric acid salts used in the present invention include sodium dihydrogen phosphate, disodium hydrogen phosphate, pentasodium phosphate, potassium dihydrogen phosphate, dipotassium hydrogen phosphate, tripotassium phosphate, and dibasic phosphate. Examples include ammonium hydrogen, diammonium hydrogen phosphate, pentaammonium phosphate, sodium tripolyphosphate, potassium pyrophosphate, sodium hexametaphosphate, and sodium pyrophosphate, with ammonium salts being particularly preferred.

これらのりン酸の塩類は水に溶解したとき。When these phosphoric acid salts are dissolved in water.

各々の性質によって酸性〜アルカリ性を示すが本発明の
木材防虫剤のＰＲ調整をする場合、単独または２つ以上
のものを組み合わせ使用することは可能である。Each of them exhibits acidic to alkaline properties depending on their properties, but when adjusting the PR of the wood insect repellent of the present invention, it is possible to use them alone or in combination of two or more.

本発明の木材防虫剤は前記の如きホウ酸およびりン酸の
塩類からなるが、これらの配合比はホウ酸７０〜９５重
量％、リン酸の塩類５〜５０重景％が好ましい。ホウ酸
が前記配合比よりも過少になれば防虫効力が懸念され、
また過大であればリン酸の塩類の種々の効果に影響を与
える。すなわち中性附近へのＰＨ調整、金属腐蝕防止等
の効果が失われる。The wood insect repellent of the present invention is composed of salts of boric acid and phosphoric acid as described above, and the blending ratio thereof is preferably 70 to 95% by weight of boric acid and 5 to 50% by weight of salts of phosphoric acid. If the amount of boric acid is less than the above mixing ratio, there is a concern about the insect repellent effect.
Moreover, if it is too large, various effects of the phosphoric acid salts will be affected. In other words, the effects of adjusting the pH to around neutrality, preventing metal corrosion, etc. are lost.

本発明の木材防虫剤を実際に木材に加工する際は°、ホ
ウ酸およびリン酸の塩類、必要により他の防虫剤、防カ
ビ剤等を同時にまたは別々に水に溶解して常法により加
圧（または減圧）注入処理を行う。When the wood insect repellent of the present invention is actually processed into wood, salts of boric acid and phosphoric acid, and if necessary, other insect repellents, fungicides, etc., are dissolved in water at the same time or separately and added using a conventional method. Perform a pressure (or reduced pressure) injection process.

以下実施例、試験例を挙げて本発明を具体的に説明する
がこれらに限定するものではない。The present invention will be specifically explained below with reference to Examples and Test Examples, but the present invention is not limited thereto.

実施例１゜ ホウ酸８５重量部とリン酸水素２アンモニウム１５重量
部を混合して本発明の木材防虫剤を得た。Example 1 A wood insect repellent of the present invention was obtained by mixing 85 parts by weight of boric acid and 15 parts by weight of diammonium hydrogen phosphate.

実施例２゜ ホウ酸９０重量部とリン酸水素５アンモニウム１０重量
部を混合して本発明の木材防虫剤を得た。Example 2 A wood insect repellent of the present invention was obtained by mixing 90 parts by weight of boric acid and 10 parts by weight of 5-ammonium hydrogen phosphate.

実施例３゜ ホウ酸８５重量部とリン酸水素２ナトリウム１５重量部
を混合して本発明の木材防虫剤を得た。Example 3 A wood insect repellent of the present invention was obtained by mixing 85 parts by weight of boric acid and 15 parts by weight of disodium hydrogen phosphate.

比較例１゜ ホウ酸７０重量部とホウ砂３０重量部を混合して木材防
虫剤を得た。Comparative Example 1 A wood insect repellent was obtained by mixing 70 parts by weight of boric acid and 30 parts by weight of borax.

比較例２゜ ホウ酸９０重量部とホウ砂１０重量部を混合して木材防
虫剤を得た・ 比較例３゜ ８ホウ酸ナトリウム４水和物からなる木材防虫剤を得た
。Comparative Example 2: A wood insect repellent was obtained by mixing 90 parts by weight of boric acid and 10 parts by weight of borax. Comparative Example 3: A wood insect repellent consisting of 8° sodium borate tetrahydrate was obtained.

試験例１．　着色防止効果確認（室内試験）第１表に示
す各側の薬剤を各々水Ｃ２重量％溶解して得た水溶液を
着色しやすい南洋材（２，５ａ　Ｘ　１０　ｃｓ　Ｘ　
２０　ｃｍ　）に減圧注入（１５０１〜２００１／ｄ）
し、！５８間室内風乾後、４日間日光曝露を行い着色度
を見た。その結果は第１表に示す如くであった。Test example 1. Coloration prevention effect confirmation (indoor test) An aqueous solution obtained by dissolving 2% by weight of water C in each side of the chemicals shown in Table 1 was prepared using South Sea wood (2.5a x 10 cs x
20 cm ) vacuum injection (1501-2001/d)
death,! After drying indoors for 58 days, it was exposed to sunlight for 4 days and the degree of coloration was determined. The results were as shown in Table 1.

第１表 ＃　１　：　ピンク色に着色 ＃　２：赤色に着色 ＃　５：赤紫色に着色 試験例２　着色防止効果確認（実用処理）第２表に示す
各薬剤で行った実用処理の結果を第２表に示す。Table 1 #1: Colored pink #2: Colored red #5: Colored reddish-purple Test Example 2 Coloring prevention effect confirmation (practical treatment) The results of practical treatment performed with each agent shown in Table 2 are shown in Table 1. It is shown in Table 2.

処理液は各々１．７重量％、処理材は着色しやすい南洋
材（２，５２Ｘ　５０　ｅｘ　Ｘ　３００　ｃｍ　）を
使用。処理方法は常法通りの加圧注入処理で薬液吸収量
は約１５０１！／ｍ’１着色度評価は表１の場合と同じ
４ 第２表 試験例６　鉄腐蝕性試験（室内試験） 第５表に示す各薬剤を各々水に２重量％醇解して得た水
ｍ液に、Ｗ色しやすい南洋材の木粉を約２４時間浸漬し
、濾過して得られた液に磨いた鉄クギを入ｆｔ５日後ク
ギ並びに液の変化をｗ４察した。結果を第３表に示す。Each treatment liquid was 1.7% by weight, and the treatment material used was South Sea wood (2.52 x 50 ex x 300 cm), which is easily colored. The treatment method is the usual pressurized injection process, and the amount of chemical liquid absorbed is approximately 1501! /m'1 Coloring degree evaluation is the same as in Table 14 Table 2 Test Example 6 Iron corrosion test (indoor test) Water obtained by dissolving 2% by weight of each drug shown in Table 5 in water. South sea wood flour, which is easily colored W, was soaked in solution M for about 24 hours, and polished iron nails were added to the solution obtained by filtration.After 5 days, changes in the nails and the solution were observed w4. The results are shown in Table 3.

第３表 試験例４゜ 比較例２の混合物を使って実用処理を続けたところ、材
への赤い着色は認めなかったが、加圧釜、薬液混合槽、
材搬入用レール、台車等に明らかなサビを認め、さらに
処理液が暗色化し処理材が黒くぼく仕上った。Table 3 Test Example 4゜When practical treatment was continued using the mixture of Comparative Example 2, no red coloring was observed on the material, but the pressure cooker, chemical mixing tank,
There was obvious rust on the rails and trolleys for transporting the materials, and the treatment solution had darkened, resulting in a black finish to the treated materials.

試験例５゜ 実施例１の混合物を１．７％溶解して得た水溶液を使っ
て実用処理を行い、その処理材中のホウ酸含有量につい
て製材ＪＡＳのホウ素化合物によって防虫処理された材
のホウ酸の定量方法に基づいて分析を行った結果、処理
材の辺材部分の表面から５１ＨＩの深さに於て０．９８
％のホウ酸が検出され、ａ材ＪＡＳの規格値１３％以上
を充分に満足することがわかった。Test Example 5゜ Practical treatment was carried out using an aqueous solution obtained by dissolving 1.7% of the mixture of Example 1, and the boric acid content in the treated material was evaluated for the insect repellent treatment with the boron compound of Lumber JAS. As a result of analysis based on the quantitative method of boric acid, it was found that at a depth of 51HI from the surface of the sapwood part of the treated wood,
% of boric acid was detected, and it was found that the A material JAS standard value of 13% or more was fully satisfied.

Claims (1)

【特許請求の範囲】[Claims] ホウ酸とリン酸の塩類とを主成分として含むことを特徴
とする木材防虫剤。A wood insect repellent characterized by containing salts of boric acid and phosphoric acid as main ingredients.