JPH06297409A - Wood modifier and modified wood treated therewith - Google Patents
Wood modifier and modified wood treated therewithInfo
- Publication number
- JPH06297409A JPH06297409A JP12184793A JP12184793A JPH06297409A JP H06297409 A JPH06297409 A JP H06297409A JP 12184793 A JP12184793 A JP 12184793A JP 12184793 A JP12184793 A JP 12184793A JP H06297409 A JPH06297409 A JP H06297409A
- Authority
- JP
- Japan
- Prior art keywords
- wood
- chitosan
- sodium silicate
- molecular weight
- low molecular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は木材改良剤及びそれで処
理した改良木材に関する。詳しくは、本発明は、キトサ
ンの低分子化物、例えば化学的或いは酵素的分解生成
物、及び珪酸ソーダの混合物からなることを特徴とする
木材改良剤及びそれで処理した改良木材に関する。本発
明は身体に無害な木材改良剤であり、木材の物性を強化
し、耐火性を向上し、抗収縮性を向上することができ
る。FIELD OF THE INVENTION This invention relates to wood improving agents and improved wood treated therewith. More particularly, the present invention relates to a wood improving agent and a modified wood treated therewith, which is characterized by comprising a mixture of a low molecular weight product of chitosan, for example, a chemical or enzymatic decomposition product, and sodium silicate. INDUSTRIAL APPLICABILITY The present invention is a wood-improving agent that is harmless to the body and can enhance the physical properties of wood, improve fire resistance, and improve anti-shrinkage properties.
【０００２】[0002]
【従来の技術】木材は天然の素材であり、腐る、狂う、
燃えるという性質は一面では欠点であるといえる。木材
の防菌、防カビ、防虫等の処理は、防腐剤を使用する
が、普通、防腐剤にパラフィン、界面活性剤等を加えた
もので、木材に撥水性を付与する加工をすることにより
行う、防腐性の溶媒としてガスオイル、軽油、高沸点灯
油留分などが使用され、浸透性は改善されるが、沸点が
高いため処理材の乾燥性が悪くなる等の問題点がある。
さらにこれら薬剤組成物の成分については、ヒトに対し
ても、作業上も安全なものであることが要求されてい
る。2. Description of the Related Art Wood is a natural material, and it decays, goes mad,
One can say that the property of burning is a drawback. Antiseptics are used to treat wood for antibacterial, antifungal, and insect repellent treatments.Usually, preservatives such as paraffin and surfactant are added to the wood to make it water repellent. Although gas oil, light oil, high boiling lighting oil fraction, etc. are used as the antiseptic solvent, the permeability is improved, but there is a problem that the drying property of the treated material is deteriorated due to the high boiling point.
Furthermore, the components of these pharmaceutical compositions are required to be safe for humans and work.
【０００３】木材に対する含浸については、従来より無
機物質の導入の考えはあるが、木材の中心の導管部内ま
での無機物質の導入、含浸には技術的に種々の制約があ
った。また、木材処理剤は処理された木材が耐用年数が
経過した後、廃材として処理する際、毒性の強いガスや
重金属類の溶出がないように選択されねばならない。Regarding the impregnation of wood, there has been a conventional idea of introducing an inorganic substance, but there have been various technical restrictions on the introduction and impregnation of the inorganic substance into the central conduit of the wood. Further, the wood treating agent must be selected so as not to elute highly toxic gas and heavy metals when it is treated as a waste material after the treated wood has passed its useful life.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、キトサンの
低分子化物、例えば化学的或いは酵素的分解生成物、及
び珪酸ソーダの混合物からなる安全な木材改良剤及びそ
れで処理した安全な改良木材を提供することを目的とす
る。SUMMARY OF THE INVENTION The present invention provides a safe wood improving agent comprising a mixture of a low molecular weight product of chitosan, for example, a chemical or enzymatic decomposition product, and sodium silicate, and a safe improved wood treated with the same. The purpose is to provide.
【０００５】[0005]
【課題を解決するための手段】そこで本発明はキトサン
の低分子化物、例えば化学的或いは酵素的分解生成物及
び珪酸ソーダの混合物からなる木材改良剤を使用する。
樹木は基本的には有限の資材であり生育についても長年
月を経て資材化されるものであり、これら木材の持つ機
能性の強化、向上は従来より望まれていた課題である。
木材の機能的強度の補強手段として樹脂などが加工含浸
されているが、これら樹脂によって耐火性については強
化されない。耐火性付与の一つの解決手段が木材の無機
質化であり、本発明は水ガラス、すなわち珪酸ソーダを
キトサンの低分子化物の混合物として木材に含浸させる
ことによって解決するものである。SUMMARY OF THE INVENTION The present invention therefore uses a wood conditioner comprising a mixture of chitosan low molecular weight products such as chemical or enzymatic degradation products and sodium silicate.
Trees are basically a finite material, and even for growth, they will be made into materials after many years, and the enhancement and improvement of the functionality possessed by these woods has long been a desired issue.
Although resin is processed and impregnated as a means for reinforcing the functional strength of wood, fire resistance is not enhanced by these resins. One solution to imparting fire resistance is mineralization of wood, and the present invention is to solve it by impregnating wood with water glass, that is, sodium silicate as a mixture of low molecular weight products of chitosan.
【０００６】木材が腐るのは、腐朽菌類、白アリ等がセ
ルラーゼ、ペクチナーゼ、ギ酸等により木材の構成物質
であるセルロース、ヘミセルロース、デンプン、ペクチ
ン等を分解して摂取、腐朽化するためである。一方、腐
朽菌類、白アリ、菌類、カビ類、その他節足動物類など
の細胞壁やプロテオグリカンではキチン質がこれらの構
築物質として存在する。木材を構成しているデンプン、
セルロース、ヘミセルロースはホモポリマーの酸性多糖
であり、その他に微量の有機金属類の銅やマンガン、鉄
などが存在する。Wood is spoiled because decay fungi, termites and the like decompose and ingest and decompose cellulose, hemicellulose, starch, pectin and the like which are constituents of wood by cellulase, pectinase, formic acid and the like. On the other hand, chitins exist as building substances in cell walls and proteoglycans of decaying fungi, termites, fungi, molds, and other arthropods. Starches that make up wood,
Cellulose and hemicellulose are homopolymeric acidic polysaccharides, and in addition, trace amounts of organometallics such as copper, manganese, and iron are present.
【０００７】分子量が３２０〜４８，０００の低分子化
キトサン及び化学的低分子化により還元末端に２．５−
アンヒドロマンノースをもつ低分子化キトサンは、等電
点をｐＨ８．５あたりに持つカチオン性の多糖及びオリ
ゴ糖で構成されるヘテロ糖であり、木材に対して親和性
がある。この親和性は、セルロースがＣ−５位にヒドロ
キシル基、Ｃ−３位にヒドロキシル基を持ち、キトサン
がＣ−５位に同じくヒドロキシル基、Ｃ−３位にヒドロ
キシル基、Ｃ−２位に反応性の強いカチオンに荷電した
アミノ基を持つという分子構造上の類似点に基づくと考
えられる。その上化学処理により低分子化したキトサン
の場合は、分子鎖末端にアルデヒド基を有する２．５−
アンヒドロマンノースが存在しているので、なおさら木
材の生体内における安定性があると推定される。[0007] A low molecular weight chitosan having a molecular weight of 320 to 48,000 and 2.5-
The low molecular weight chitosan having anhydromannose is a heterosaccharide composed of a cationic polysaccharide and an oligosaccharide having an isoelectric point around pH 8.5 and has an affinity for wood. This affinity is because cellulose has a hydroxyl group at the C-5 position and a hydroxyl group at the C-3 position, and chitosan reacts at the C-5 position at the same hydroxyl group, at the C-3 position at the hydroxyl group, and at the C-2 position. It is considered that it is based on the similarities in the molecular structure of having a charged amino group in a strong cation. Furthermore, in the case of chitosan whose molecular weight has been lowered by chemical treatment, 2.5- having an aldehyde group at the end of the molecular chain
Due to the presence of anhydromannose, it is presumed that there is even more stability of the wood in vivo.
【０００８】キトサンは単体ではＤ−グルコサミンあた
り７糖あたりの抗菌性が報告されており、抗カビ性につ
いては、低分子量化した分子量４８，０００以下のもの
も報告され、抗菌活性の存在が報告されている。これら
の抗菌、抗カビの作用を走査型電子顕微鏡で観察する
と、糸状菌やカワラタケ、ナミダタケ、オオウズラタケ
は脱アセチル化により分子構造が変化したキトサンに対
して、これらを分解して木材に侵入しようとしたとき、
自己の分泌する酵素によりキチン質を構造物質として保
有する自己の菌糸やグリカンが溶解していることが観察
され、増殖機能が停止していると推定される。特に低分
子化したキトサンは、Ｃ−２位にアミノ基をもち抗生物
質のカナマイシン類と類似した構造を持ち、原核細胞の
１６ｓリボソームＲＮＡに働き、リボソームの翻訳を特
異的に阻害すると報告され、また、リボザイムの一つと
して知られているグループ２のイントロン５′側のエキ
ソンは１６ｓリボソームＲＮＡの高次構造を認識し働く
事が考えられ、この事は菌類やカビ類の増殖の阻害作用
として働くことが期待される。[0008] Chitosan alone has been reported to have antibacterial properties per 7-sugar per D-glucosamine, and as for antifungal properties, low molecular weight compounds having a molecular weight of 48,000 or less have been reported and the presence of antibacterial activity has been reported. Has been done. When these antibacterial and antifungal actions are observed with a scanning electron microscope, filamentous fungi, kawaratake, namidatake, and oyster mushrooms attempt to break down chitosan whose molecular structure has been changed by deacetylation and try to penetrate into wood. When I did
It is presumed that the mycelia and glycans possessing chitin as a structural substance are dissolved by the enzyme secreted by the self, and the proliferative function is stopped. In particular, low molecular weight chitosan has an amino group at the C-2 position and has a structure similar to that of the antibiotic kanamycins, and is reported to act on 16s ribosomal RNA of prokaryotic cells and specifically inhibit the translation of ribosomes. In addition, the exon on the intron 5'side of group 2, which is known as one of ribozymes, may act by recognizing the higher-order structure of 16s ribosomal RNA, which is an inhibitory effect on the growth of fungi and molds. Expected to work.
【０００９】キトサンの化学的或いは酵素的分解生成物
１重量部に対して珪酸ソーダ０．１〜８．０重量部の割
合で使用するものが好ましい。最も好ましくは混合物は
ｐＨ５〜１２の水溶液として使用される。キトサンの酵
素的分解生成物は、キトサンの分子量が３２０〜４８，
０００の低分子量キトサンであり、キトサンの化学的分
解生成物は、分子量が３２０〜４８，０００の低分子量
キトサン及び２．５−アンヒドロマンノースの混合物で
ある。これらのものは、ｐＨ８．５の水溶液又は粉体の
状態で使用され、且つ濃度としては０．０１〜５％重量
％の範囲に調節して用いることが好ましい。このように
調節した低分子量キトサン、２．５−アンヒドロマンノ
ース等の水溶液に、０℃〜９０℃の温度範囲に加温しな
がら攪拌して、珪酸ソーダを添加する、低分子化キトサ
ン分子内の各官能基と珪酸ソーダの間で錯体化、若しく
は化学的結合が起きていると考えられる。It is preferable to use 0.1 to 8.0 parts by weight of sodium silicate with respect to 1 part by weight of a chemical or enzymatic decomposition product of chitosan. Most preferably the mixture is used as an aqueous solution having a pH of 5-12. The enzymatic degradation product of chitosan has a molecular weight of chitosan of 320 to 48,
000 low molecular weight chitosan and the chemical degradation product of chitosan is a mixture of low molecular weight chitosan with a molecular weight of 320-48,000 and 2.5-anhydromannose. These are used in the form of an aqueous solution or powder having a pH of 8.5, and the concentration is preferably adjusted to be in the range of 0.01 to 5% by weight and used. In the low molecular weight chitosan molecule, sodium silicate is added to the thus prepared aqueous solution of low molecular weight chitosan, 2.5-anhydromannose, etc. while stirring while heating in a temperature range of 0 ° C to 90 ° C. It is considered that complexation or chemical bonding occurs between each functional group of and the sodium silicate.
【００１０】錯体化が起きた糖鎖は珪酸ソーダと共に溶
液中に溶解し、低分子量キトサン及び２．５−アンヒド
ロマンノースによる赤色の求核呈色が確認される、キト
サン及び２．５−アンヒドロマンノースは、結合もしく
は錯体化した無機物質を木材の細胞組織内に特異的に導
入することができると推定される。珪酸ソーダのｐＨは
１２程度あり、分子量の大きいキトサンは析出沈降する
ので遠心分離操作等により除去する。これらの物質は木
材の柔組織及び細胞壁、細胞膜、導管部、維管束に対し
て含浸、導入することが困難なためである。The complexed sugar chain is dissolved in a solution together with sodium silicate, and a red nucleophilic coloration by low molecular weight chitosan and 2.5-anhydromannose is confirmed. Chitosan and 2.5-an It is presumed that hydromannose can specifically introduce a bound or complexed inorganic substance into the tissue of wood. Sodium silicate has a pH of about 12, and chitosan having a large molecular weight precipitates and precipitates. Therefore, it is removed by centrifugation or the like. This is because it is difficult to impregnate and introduce these substances into the soft tissue of wood, cell walls, cell membranes, conduits, and vascular bundles.
【００１１】木材への含浸は、これらの溶液中に木材を
浮遊させ又はこれらの溶液を木材表面にスプレーコート
等により被覆してから、真空含浸処理又は加圧含浸処理
をする、次いで、ｐＨ５〜７に調節した酢酸水溶液中に
て珪酸ソーダのガラス化と細胞質内への固定化をさせ、
蒸発乾燥させる、蒸発乾燥はアルコール類、フェノール
類、石油関連物質の蒸発性を利用してもよい。或いは上
記酢酸水溶液処理を省いてもよい。蒸発乾燥によりキト
サン等及び珪酸ソーダを木材細胞内に析出、固定化する
ことができる。導入剤として機能する低分子化キトサン
は、珪酸ソーダの他にクロム、マンガン、カルシウム、
ホウ酸、ホウ素、珪素、アルミニウム、鉄等の化合物又
はこれら化合物のイオンを木材細胞内に導入が可能であ
る。従来使用されている樹脂等も木材細胞内に導入が可
能であることはいうまでもない。The impregnation of wood is carried out by suspending the wood in these solutions or coating these solutions on the wood surface by spray coating or the like, followed by vacuum impregnation treatment or pressure impregnation treatment, and then pH 5 to 5. In the acetic acid aqueous solution adjusted to 7, vitrification of sodium silicate and immobilization in the cytoplasm,
Evaporative drying may be performed by utilizing the evaporative properties of alcohols, phenols and petroleum-related substances. Alternatively, the treatment with the acetic acid aqueous solution may be omitted. By evaporating and drying, chitosan or the like and sodium silicate can be precipitated and immobilized in wood cells. The low molecular weight chitosan that functions as an introduction agent is chromium, manganese, calcium, in addition to sodium silicate,
Compounds such as boric acid, boron, silicon, aluminum and iron or ions of these compounds can be introduced into wood cells. Needless to say, conventionally used resins and the like can also be introduced into wood cells.
【００１２】珪酸ソーダは水ガラスとも呼ばれ難燃性、
物性機能強化、防腐効果が優れている。珪酸ソーダはキ
トサンの低分子化物構成のヘテロ糖のＣ−５位のカルボ
キシル基及びＣ−３位のヒドロキシル基と錯体化を行う
事は容易に推察され。これらの低分子化キトサンのヘテ
ロ糖は核酸、塩基、各種糖タンパク質、糖脂質、ホルモ
ンタンパク質、抗体、アルカロイド、レクチン等の有機
物質と結合して生理調節、発現、制御に働く。一方、珪
酸の生体内での結晶構造は従来報告されているような結
晶構造とは相違し、低分子化キトサンが珪酸分子の間に
存在した状態で結晶化しており、これらのヘテロ糖が木
材を構成する柔組織のセルロース、ヘミセルロース、ペ
クチンと結合し木材の導管部内を始め中心部に固定して
いると考えられる。Sodium silicate, also called water glass, is flame retardant,
Excellent physical property enhancement and antiseptic effect. It is easily inferred that sodium silicate forms a complex with the carboxyl group at the C-5 position and the hydroxyl group at the C-3 position of the hetero sugar having a low molecular weight structure of chitosan. These low molecular weight chitosan heterosaccharides bind to organic substances such as nucleic acids, bases, various glycoproteins, glycolipids, hormone proteins, antibodies, alkaloids, and lectins to act for physiological regulation, expression, and control. On the other hand, the in-vivo crystal structure of silicic acid is different from that reported previously, and the low molecular weight chitosan is crystallized in the presence of silicic acid molecules. It is thought that it binds to the soft tissue cellulose, hemicellulose, and pectin that make up the wood, and fixes it in the central part of the wood, including in the conduit part.
【００１３】[0013]
【実施例】実施例により本発明を説明する。実施例１ 試験検体は、米マツの木材片の木目の良く詰まった柾目
部分を、同一木材から切りだした木材片で、木口面が５
００ｍｍ×６５０で、高さ４００ｍｍに切断したものを
３個、減圧デシケーター内１６８時間、シリカゲル上で
乾燥させたものを使用した。珪酸ソーダｐＨ１２，Ｓｉ
Ｏ２純分２９％，ＮａＯ ９．５％，粘度１３０ｃｐｓ
の水溶液２００ｍｌ，純水１００ｍｌに低分子化キトサ
ン（キトサン、キトオリゴ糖及び２．５−アンヒドロマ
ンノースの混合物）を６重量％，ｐＨ８．５の水溶液と
し珪酸ソーダ溶液に添加、総液量３００ｍｌ，ｐＨ１２
とし攪拌混合した。用意した試験木材片３個は、３０
分、６０分、９０分の３試験時間帯区分の含浸時間と
し、各加圧含浸圧力は１ｃｍ２当たり１０キロとした。
含浸の結果を表１、表２に示す。The present invention will be described with reference to examples. Example 1 A test sample is a piece of wood obtained by cutting out a well-grained grain portion of a piece of wood of pine pine from the same piece of wood, and having a knuckle surface of 5
Three pieces cut to a height of 400 mm with a size of 00 mm × 650 were dried on silica gel for 168 hours in a vacuum desiccator. Sodium silicate pH 12, Si
O 2 pure content 29%, NaO 9.5%, viscosity 130 cps
Aqueous solution (200 ml) and deionized water (100 ml) containing 6% by weight of low molecular weight chitosan (mixture of chitosan, chitooligosaccharide and 2.5-anhydromannose) as an aqueous solution of pH 8.5 and added to a sodium silicate solution, total volume 300 ml, pH 12
And mixed with stirring. 3 pieces of test wood prepared are 30
The impregnation time was divided into three test time zones of minutes, 60 minutes, and 90 minutes, and the pressure impregnation pressure was 10 kg per cm 2 .
The results of impregnation are shown in Tables 1 and 2.
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【表２】 [Table 2]
【００１６】実施例２ 実施例１で得られた含浸木材について、米マツの試験片
検体１を純水へ酢酸を添加してｐＨ４とした溶液中に約
３時間浸漬後、メタノール中ｐＨ７に４時間浸漬して１
晩室外で風乾した。検体２・検体３については、最初か
らメタノール溶液ｐＨ７に約２時間浸漬後室外で風乾１
晩した。検体１のものは、もとの木材と同様若しくはそ
れ以上色・香りのよい仕上がりである。検体２・３のも
のは、木材の表面が少し白くなった。これら木材細胞中
における珪酸ソーダの結晶構造は、走査型電子顕微鏡で
観察するとその間に低分子化キトサンが存在した状態で
結晶化しているのが確認された。 Example 2 With respect to the impregnated wood obtained in Example 1, a test piece specimen 1 of pine rice was soaked in a solution of acetic acid added to pure water to have a pH of 4 for about 3 hours, and then was added to a pH of 7 in methanol. Soak for 1 hour
Air dried outdoors in the evening. Samples 2 and 3 were soaked in methanol solution pH 7 for about 2 hours from the beginning and then air dried 1
I had an evening. Sample 1 has a finish with a color and fragrance similar to or better than the original wood. Samples 2 and 3 had a slightly whiter wood surface. The crystal structure of sodium silicate in these wood cells was confirmed to be crystallized in the presence of low molecular weight chitosan during the observation with a scanning electron microscope.
【００１７】[0017]
【発明の効果】木材の細胞質に浸透しやすい液状とな
り、木材細胞質に固定化される安全な木材改良剤及びそ
れで処理された安全な改良木材を提供することができ
る。木材細胞中に含浸された珪酸は５％以上で効果があ
る事が報告されているが、そのような珪酸ソーダによる
木材の無機質化を容易に達成することができ、防腐効
果、難燃性、抗収縮性等の物性強化に働き、木材の持つ
欠点を全てカバーする木材改良剤及びそれで処理された
改良木材を提供することができる。更に木材の使命終了
後の廃材を自然崩壊性とすることもできる。EFFECTS OF THE INVENTION It is possible to provide a safe wood improving agent which becomes a liquid which easily penetrates into the cytoplasm of wood and is immobilized in the wood cytoplasm, and a safe improved wood treated with the same. It has been reported that silicic acid impregnated in wood cells is effective at 5% or more. However, it is possible to easily achieve the mineralization of wood by such sodium silicate, and the antiseptic effect, flame retardancy, It is possible to provide a wood improving agent which works for strengthening physical properties such as anti-shrinkage property and covers all the drawbacks of wood and improved wood treated with the wood improving agent. Furthermore, the waste material after the end of the mission of wood can be made to be naturally disintegrating.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 辻村 鉄蔵 千葉県山武郡芝山町小池2759−３ 株式会 社共和テクノス内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuzo Tsujimura 2759-3 Koike, Shibayama-cho, Sanmu-gun, Chiba Prefecture Kyowa Technos Co., Ltd.
Claims (5)
混合物からなることを特徴とする木材改良剤。1. A wood improving agent comprising a mixture of a low molecular weight product of chitosan and sodium silicate.
珪酸ソーダ０．１〜８．０重量部の割合で使用する請求
項１記載の木材改良剤。2. The wood improving agent according to claim 1, which is used in a ratio of 0.1 to 8.0 parts by weight of sodium silicate to 1 part by weight of a low molecular weight product of chitosan.
求項１又は請求項２記載の木材改良剤。3. The wood improving agent according to claim 1, wherein the mixture is an aqueous solution having a pH of 5 to 12.
木材改良化剤で処理した改良木材。4. An improved wood treated with the wood improving agent according to claim 1, claim 2 or claim 3.
の改良木材。5. The improved wood according to claim 4, wherein the treatment is impregnation or coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12184793A JPH06297409A (en) | 1993-04-13 | 1993-04-13 | Wood modifier and modified wood treated therewith |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12184793A JPH06297409A (en) | 1993-04-13 | 1993-04-13 | Wood modifier and modified wood treated therewith |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06297409A true JPH06297409A (en) | 1994-10-25 |
Family
ID=14821411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12184793A Withdrawn JPH06297409A (en) | 1993-04-13 | 1993-04-13 | Wood modifier and modified wood treated therewith |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06297409A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07227808A (en) * | 1994-02-22 | 1995-08-29 | Toyo Mokuzai Boufu Kk | Wood preservative |
| DE10042196A1 (en) * | 2000-08-28 | 2002-03-28 | Wolfgang Dellith | Low-toxicity, environmentally-neutral, long-lasting protectant for wood against insects and fungi has water-soluble alkali silicate as main ingredient |
| JP2011509201A (en) * | 2008-01-09 | 2011-03-24 | ストラ・エンソ・ウッド・プロダクツ・オサケユキテュア・リミテッド | Method of pressure impregnating wood or wood products with a wood preservative containing water glass, and impregnated wood or wood products |
| FR3058155A1 (en) * | 2016-11-03 | 2018-05-04 | Universite De Pau Et Des Pays De L'adour | NEW FLAME RETARDANT COMPOSITIONS |
| CN109049210A (en) * | 2018-09-25 | 2018-12-21 | 安徽省汉甲机电设备科技有限公司 | A kind of modified wicker wicker plaiting article of chitosan graft |
-
1993
- 1993-04-13 JP JP12184793A patent/JPH06297409A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07227808A (en) * | 1994-02-22 | 1995-08-29 | Toyo Mokuzai Boufu Kk | Wood preservative |
| DE10042196A1 (en) * | 2000-08-28 | 2002-03-28 | Wolfgang Dellith | Low-toxicity, environmentally-neutral, long-lasting protectant for wood against insects and fungi has water-soluble alkali silicate as main ingredient |
| JP2011509201A (en) * | 2008-01-09 | 2011-03-24 | ストラ・エンソ・ウッド・プロダクツ・オサケユキテュア・リミテッド | Method of pressure impregnating wood or wood products with a wood preservative containing water glass, and impregnated wood or wood products |
| FR3058155A1 (en) * | 2016-11-03 | 2018-05-04 | Universite De Pau Et Des Pays De L'adour | NEW FLAME RETARDANT COMPOSITIONS |
| WO2018083269A1 (en) * | 2016-11-03 | 2018-05-11 | Université De Pau Et Des Pays De L'adour | Novel fire-retardant compositions |
| US11319428B2 (en) | 2016-11-03 | 2022-05-03 | Université De Pau Et Des Pays De L'adour | Fire-retardant compositions |
| CN109049210A (en) * | 2018-09-25 | 2018-12-21 | 安徽省汉甲机电设备科技有限公司 | A kind of modified wicker wicker plaiting article of chitosan graft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000704 |