JPH04197602A - Manufacture of synthetic resin-impregnated cured wooden material - Google Patents
Manufacture of synthetic resin-impregnated cured wooden materialInfo
- Publication number
- JPH04197602A JPH04197602A JP33220590A JP33220590A JPH04197602A JP H04197602 A JPH04197602 A JP H04197602A JP 33220590 A JP33220590 A JP 33220590A JP 33220590 A JP33220590 A JP 33220590A JP H04197602 A JPH04197602 A JP H04197602A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- wood material
- aqueous solution
- wooden material
- condensation
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 229920005989 resin Polymers 0.000 claims abstract description 60
- 239000011347 resin Substances 0.000 claims abstract description 60
- 230000005855 radiation Effects 0.000 claims abstract description 23
- 239000007864 aqueous solution Substances 0.000 claims abstract description 22
- 238000009833 condensation Methods 0.000 claims abstract description 18
- 230000005494 condensation Effects 0.000 claims abstract description 17
- RNFNDJAIBTYOQL-UHFFFAOYSA-N chloral hydrate Chemical compound OC(O)C(Cl)(Cl)Cl RNFNDJAIBTYOQL-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229960002327 chloral hydrate Drugs 0.000 claims abstract description 13
- 239000002023 wood Substances 0.000 claims description 49
- 239000000243 solution Substances 0.000 claims description 33
- 230000001678 irradiating effect Effects 0.000 claims description 4
- 238000002347 injection Methods 0.000 abstract description 18
- 239000007924 injection Substances 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 15
- 229920003002 synthetic resin Polymers 0.000 abstract description 14
- 239000000057 synthetic resin Substances 0.000 abstract description 14
- YNJBWRMUSHSURL-UHFFFAOYSA-N trichloroacetic acid Chemical compound OC(=O)C(Cl)(Cl)Cl YNJBWRMUSHSURL-UHFFFAOYSA-N 0.000 abstract description 7
- 229960004319 trichloroacetic acid Drugs 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 239000003999 initiator Substances 0.000 abstract 1
- 238000006116 polymerization reaction Methods 0.000 description 10
- 229920000877 Melamine resin Polymers 0.000 description 7
- 238000012643 polycondensation polymerization Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 229920001807 Urea-formaldehyde Polymers 0.000 description 5
- 239000003377 acid catalyst Substances 0.000 description 5
- 239000004202 carbamide Substances 0.000 description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 3
- XPFVYQJUAUNWIW-UHFFFAOYSA-N furfuryl alcohol Chemical compound OCC1=CC=CO1 XPFVYQJUAUNWIW-UHFFFAOYSA-N 0.000 description 3
- 238000010526 radical polymerization reaction Methods 0.000 description 3
- 239000004640 Melamine resin Substances 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- -1 melamine methylol compounds Chemical class 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000011120 plywood Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000003505 polymerization initiator Substances 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 235000007173 Abies balsamea Nutrition 0.000 description 1
- 241000218685 Tsuga Species 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000007849 furan resin Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- OOYGSFOGFJDDHP-KMCOLRRFSA-N kanamycin A sulfate Chemical group OS(O)(=O)=O.O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CN)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O[C@@H]2[C@@H]([C@@H](N)[C@H](O)[C@@H](CO)O2)O)[C@H](N)C[C@@H]1N OOYGSFOGFJDDHP-KMCOLRRFSA-N 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N methanol Natural products OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 150000007523 nucleic acids Chemical class 0.000 description 1
- 102000039446 nucleic acids Human genes 0.000 description 1
- 108020004707 nucleic acids Proteins 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000010875 treated wood Substances 0.000 description 1
- 239000010876 untreated wood Substances 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Landscapes
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は建築用材料や家具等に用いられる改質された合
成樹脂含浸硬化木質材の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for producing a modified synthetic resin-impregnated hardened wood material used for building materials, furniture, and the like.
（従来の技術）
従来から、木質材に合成樹脂液を注入、硬化して改質す
る方法が広く行われており、例えば、木質材にアクリル
樹脂、ポリエステル樹脂、ＭＭＡやスチレン等のモノマ
ー、プレポリマーなどの疎水性樹脂溶液を注入したのち
、熱や放射線でラジカル重合させることにより硬化させ
る方法や、酸触媒を添加した尿素樹脂、メラミン樹脂な
どの親水性樹脂溶液を木質材に注入したのち、加熱によ
り重合、硬化させる方法が採用されている。(Prior art) Conventionally, a method of injecting a synthetic resin liquid into wood material and curing it to modify it has been widely used. After injecting a hydrophobic resin solution such as a polymer and then curing it by radical polymerization with heat or radiation, or by injecting a hydrophilic resin solution such as urea resin or melamine resin with an acid catalyst into the wood material, A method of polymerizing and curing by heating is used.
（発明が解決しようとする課題）
しかしながら、前者のように疎水性樹脂溶液を木質材に
注入、硬化させγこ場合、圧縮強度や表面硬度、化粧性
を向上させることができるが、木質材は親水性であるた
めに、社内の微細な空隙部まで該樹脂溶液を含浸させる
ことができず、従って木質材に高い寸法安定性を付与す
ることができないと共に、煮沸等の過激な条件において
の使用が困難である等の問題点を有する。(Problem to be Solved by the Invention) However, in the former case, by injecting a hydrophobic resin solution into a wooden material and curing it, compressive strength, surface hardness, and cosmetic properties can be improved, but the Due to its hydrophilic nature, it is not possible to impregnate the resin solution into minute voids within the company, and therefore it is not possible to impart high dimensional stability to wood materials, and it cannot be used under extreme conditions such as boiling. There are problems such as difficulty in
一方、後者の親水性樹脂溶液においては、木質材はセル
ロースやリグニンなどのように側鎖にＯ）ｌ基を有して
いる成分よりなり、親水性であるから、両者は馴染み性
が良く、社内の微細な空隙部まで該樹脂溶液を含浸させ
ることができるが、尿素樹脂やメラミン樹脂は縮重合型
樹脂であってラジカル重合型樹脂ではないために放射線
による重合は行われず、そのため、上記のように酸触媒
を添加して加熱による重合反応で硬化させなければなる
ない。On the other hand, in the latter hydrophilic resin solution, the wood material is made of components having O)l groups in the side chains, such as cellulose and lignin, and is hydrophilic, so the two have good compatibility. The resin solution can be impregnated into the minute voids in the company, but since urea resins and melamine resins are condensation polymerization resins and not radical polymerization resins, they are not polymerized by radiation, so the above method is not possible. In this way, an acid catalyst must be added and the polymer must be cured through a polymerization reaction by heating.
この場合、酸触媒による重合過程では、核酸触媒の添加
後、樹脂溶液の粘度が徐々に高くなるために使用時間か
制約されて円滑な注入処理か行えなくなるばかりでなく
、柱内の微細空隙への注入度が低下して繰り返し使用す
ることか困難となり、加熱による硬化処理過程では、−
旦、樹脂溶液を柱内の微細空隙まで注入しても、加熱に
よって発生する内部の蒸気圧差により樹脂溶液が社外に
吹き出す可能性があり、微細空隙内での樹脂溶液の均一
な注入、硬化が行えないという問題点がある。In this case, in the polymerization process using an acid catalyst, the viscosity of the resin solution gradually increases after the addition of the nucleic acid catalyst, which limits the usage time and makes it impossible to perform a smooth injection process. The degree of injection decreases, making it difficult to use repeatedly, and during the curing process by heating, -
Even if the resin solution is injected into the microscopic voids within the column, there is a possibility that the resin solution will blow out due to the internal vapor pressure difference generated by heating, making it difficult to uniformly inject and harden the resin solution within the microscopic voids. The problem is that it cannot be done.
本発明はこのような問題点に鑑みてなされたものであっ
て、木質材と馴染み性の良い親水性樹脂を木質材の微細
空隙まで含浸させて均一に硬化させることを目的とした
合成樹脂含浸硬化木質材の製造方法を提供するものであ
る。The present invention was made in view of these problems, and is a synthetic resin impregnation method that aims to impregnate even the minute voids of wood materials with a hydrophilic resin that is compatible with wood materials and harden them uniformly. A method of manufacturing hardened wood material is provided.
（課題を解決するための手段）
上記目的を達成するために、本発明の合成樹脂含浸硬化
木質材の製造方法は、木質材に抱水クロラールを添加し
ている縮重合型樹脂水溶液を含浸させたのち、放射線を
照射巳て前記樹脂水溶液を重合、硬化させることを特徴
とするものである。(Means for Solving the Problems) In order to achieve the above object, the method for producing a synthetic resin-impregnated hardened wood material of the present invention involves impregnating a wood material with an aqueous condensation resin solution to which chloral hydrate has been added. Thereafter, the aqueous resin solution is polymerized and cured by irradiating with radiation.
（作 用）
木質材はセルロースやリグニンなどのようコニ側鎖にＯ
Ｈ基を有していて親水性であると共に、尿素樹脂やメラ
ミン樹脂等の縮重合型樹脂も親水性樹脂であるから両者
の馴染み性が良好であり、従って、縮重合型樹脂水溶液
は木質材内の微細空隙１’−まで浸透する。(Function) Wood materials have O in their side chains, such as cellulose and lignin.
Since it has an H group and is hydrophilic, condensation resins such as urea resins and melamine resins are also hydrophilic resins, so they have good compatibility with each other. Penetrates up to the microscopic voids 1'- within.
この際、縮重合型樹脂水溶液には、従来のような重合反
応を促進させる酸触媒を添加していないので、樹脂注入
時や繰り返し使用によっても徐々に重合度が進むことな
く、常時、低粘度を保持して木質材内の微細空隙部まで
円滑且つ確実に浸透するものである。At this time, the condensation type resin aqueous solution does not contain an acid catalyst that promotes the polymerization reaction as in conventional methods, so the degree of polymerization does not gradually increase even during resin injection or repeated use, and it always maintains a low viscosity. , and penetrates smoothly and reliably into the minute voids within the wood material.
こうして、木質材に縮重合型樹脂水溶液を注入したのち
、放射線を照射すると、該縮重合型樹脂水溶液に抱水ク
ロラールを添加しているので、放射線の照射により抱水
クロラールが分解してトリクロール酢酸が生成され、こ
のトリクロール酢酸が重合開始剤となって放射線縮重合
反応が行われる。In this way, when an aqueous condensation resin solution is injected into a wood material and then irradiated with radiation, chloral hydrate is added to the aqueous condensation resin solution. Acetic acid is produced, and this trichloroacetic acid serves as a polymerization initiator to carry out a radiation condensation polymerization reaction.
又、二のように放射線による重合であるから、木質材の
内部において、トリクロール酢酸が励起されて樹脂の縮
合重合が進行し、従来のような熱等Ｃ：よる重合反応に
比べて、−旦注入された樹脂溶液が柱内で殆ど移動する
ことなく、均一な樹脂の硬化を達成し得るものである。In addition, since the polymerization is carried out by radiation as shown in 2, trichloroacetic acid is excited inside the wood material and the condensation polymerization of the resin proceeds, compared to the conventional polymerization reaction by heat etc. Uniform resin curing can be achieved with almost no movement of the resin solution once injected within the column.
（実 施 例）
次に本発明の実施例を詳しく述べると、まず、木質材に
注入する縮重合型合成樹脂水溶液を調整する。(Example) Next, an example of the present invention will be described in detail. First, an aqueous condensation type synthetic resin solution to be injected into a wood material is prepared.
このような合成樹脂水溶液としては、フルフラール、フ
ルフリルアルコールなどの七ツマ−のｌＯ〜９５％濃度
の水溶液；尿素、メラミンのメチロール化４物や初期縮
合物または該初期縮合物をアルキル化したもののｌＯ〜
７０％濃度の水溶液等が用いられ、この合成樹脂水溶液
に触媒として抱水クロラール（ＣＣ１３ＣＨ（叶）２）
を添加して注入液とする。Examples of such synthetic resin aqueous solutions include aqueous solutions of 10 to 95% concentration such as furfural and furfuryl alcohol; urea and melamine methylol compounds, initial condensates, and alkylated initial condensates. lO~
A 70% concentration aqueous solution is used, and chloral hydrate (CC13CH (Kano)2) is added to this synthetic resin aqueous solution as a catalyst.
is added to make an injection solution.
次いで、この樹脂注入液を木質材に注入、浸透させる。Next, this resin injection liquid is injected into the wood material and allowed to penetrate.
注入処理される木質材としては、角材や板材、中空材等
の厚い製材品、合板、集成材、単板のような薄板等のい
ずれであってもよく、又、その樹種も特に限定されない
。The wood material to be injected may be any thick lumber product such as a square lumber, plate material, or hollow lumber, plywood, laminated wood, or thin board such as a veneer, and the type of wood is not particularly limited.
又、木質材に対する注入方法は、減圧法、加圧法、減圧
・加圧法、或いは浸漬法のいずれで行ってもよく、木質
材内に合成樹脂水溶液が均一に注入するように材の形状
や寸法、浸透性、樹種に適した方法、条件を適宜に選択
すればよい。In addition, the injection method into the wood material may be carried out by any of the reduced pressure method, pressurization method, reduced pressure/pressure method, or immersion method. , permeability, and the method and conditions suitable for the tree species may be selected as appropriate.
このような適宜な注入手段を用いて、木質材に抱水クロ
ラールを添加している縮重合型合成樹脂水溶液を注入す
ると、該縮重合型合成樹脂水溶液並びに木質材は共に親
水性であるために、樹脂水溶液は木材細胞の微細な空隙
内部にまで充分に且つ均一に浸透、含浸する。When a condensation type synthetic resin aqueous solution containing chloral hydrate is injected into a wood material using such an appropriate injection means, since both the condensation type synthetic resin aqueous solution and the wood material are hydrophilic, The aqueous resin solution penetrates and impregnates the inside of the fine pores of the wood cells sufficiently and uniformly.
こうして、木質材に縮重合型樹脂水溶液を注入したのち
、放射線を照射して該樹脂水溶液を重合硬化させる。After the aqueous condensation resin solution is injected into the wood material in this manner, the aqueous resin solution is polymerized and cured by irradiation with radiation.
使用する放射線としては、γ線、Ｘ線、電子線のいずれ
であってもよく、また、照射条件としてはＴ線を使用し
た場合には線量率１０３〜１０６ｒａｄ／ｈｒ、総線量
０．５〜２０Ｍｒａｄの範囲が好ましい。一方、電子線
を使用した場合には加速電圧０４３〜２．５ＭｅＶ、総
線量１〜１００Ｍｒａｄの範囲で注入樹脂水溶液を硬化
させることができるが、電子線は透過性が小さいので、
合板や製材品の表面のみの樹脂注入硬化処理や単板のよ
うな薄板の硬化処理を施すのユニ適する。The radiation used may be γ-rays, X-rays, or electron beams, and the irradiation conditions are: when T-rays are used, the dose rate is 103 to 106 rad/hr, and the total dose is 0.5 to A range of 20 Mrad is preferred. On the other hand, when using an electron beam, the injected resin aqueous solution can be cured at an accelerating voltage of 043 to 2.5 MeV and a total dose of 1 to 100 Mrad, but since the electron beam has low transparency,
It is suitable for resin injection hardening only on the surface of plywood and lumber products, and for hardening thin plates such as veneers.
このような放射線を縮重合型樹脂水溶液を注入した木質
材に照射すると、縮重合型樹脂水溶液に添加している抱
水クロラールが放射線によって次式に示すように分解し
てトリクロール酢酸を生成する。When such radiation is applied to a wood material injected with an aqueous condensation resin solution, the chloral hydrate added to the condensation resin aqueous solution is decomposed by the radiation as shown in the following formula, producing trichloracetic acid. .
ＣＣ１３ＣＨ（ＯＨ） ｚ □→ＣＣｌ５ＣＯＯＨ
こうして生成されたトリクロール酢酸が重合開始剤とな
って縮重合型樹脂水溶液の放射線縮重合反応が行われる
。CC13CH(OH) z □→CCl5COOH
The trichloroacetic acid thus produced serves as a polymerization initiator to carry out the radiation condensation polymerization reaction of the aqueous condensation resin solution.
従って、放射線の照射によって木質材の内部において、
トリクロール酢酸が励起されて注入された樹脂溶液が社
内で殆ど移動することなく縮合重合が進行し、均一な樹
脂の硬化が行われるものである。Therefore, inside the wood material by irradiation with radiation,
The trichloroacetic acid is excited and the injected resin solution undergoes condensation polymerization with almost no movement within the company, resulting in uniform curing of the resin.
木質材に放射線の照射後、直ちに、又は数日間放置して
注入樹脂の硬化を促進させたのち、この合成樹脂注入処
理木質材を水または炭酸水素ナトリウムなどのアルカリ
希薄水溶液で洗浄して木質材に付着している未反応モノ
マーと生成した酸を除去し、次いで熱風或いは減圧乾燥
、自然乾燥等によって木質材を乾燥し、合成樹脂注入硬
化木質材（ＷＰＣ）を得るものである。Immediately after irradiating the wood material with radiation, or leaving it for several days to accelerate the curing of the injected resin, the synthetic resin injection treated wood material is washed with water or a dilute alkaline aqueous solution such as sodium bicarbonate to form the wood material. The unreacted monomers attached to the wood and the generated acid are removed, and then the wood material is dried by hot air, vacuum drying, natural drying, etc. to obtain a synthetic resin injection cured wood material (WPC).
次に、本発明の具体的な実施例を示す。Next, specific examples of the present invention will be shown.
〔実施例 ｌり
３７％濃度のホルムアルデヒド水溶液：尿素−１゜Ｏ：
３０の割合で混合してなる樹脂水溶液を三ツロフラスコ
に入れたのち、適量の水酸化ナトリウム水溶液を添加し
てｐＨを７〜８に調整し、オイルハス上で９０°Ｃ１１
時間加熱、攪拌を行った。さらに、冷却後、蟻酸を添加
してｐＨを４に調整したのち、９０°Ｃで３時間、加熱
、攪拌を行い、次いで、この樹脂水溶液に水酸化ナトリ
ウム水溶液を加えて中和させたのち、減圧蒸留により脱
水して尿素プレポリマーとし、この尿素プレポリマーの
４０％水溶？Ｆ！ｊ、に抱水クロラールを２％添加して
尿素樹脂を主成分とする注入液を調整した。[Example: Formaldehyde aqueous solution with a concentration of 37%: Urea - 1°O:
After putting the resin aqueous solution mixed at a ratio of 30% into a Mitsuro flask, add an appropriate amount of sodium hydroxide aqueous solution to adjust the pH to 7 to 8, and heat it on an oil bath at 90°C 11
The mixture was heated and stirred for a period of time. Furthermore, after cooling, formic acid was added to adjust the pH to 4, followed by heating and stirring at 90°C for 3 hours, and then, after neutralizing by adding a sodium hydroxide aqueous solution to this resin aqueous solution, Dehydrated by vacuum distillation to make urea prepolymer, and 40% of this urea prepolymer is soluble in water? F! 2% of chloral hydrate was added to j, to prepare an injection solution containing urea resin as a main component.
この注入液を３０ Ｘ ３０ Ｘ ６０ｍｍ寸法のヘイ
ツガ柾目の全乾燥木質材に注入した。This injection solution was injected into a completely dry hemlock straight-grain wood with dimensions of 30 x 30 x 60 mm.
注入処理は、まず、該木質材を収容した容器をデシケー
タに入れ、アスピレータで３０ｍｍＨｇの減圧下におい
て３０分間保持し、次いで、容器内に注入液を導入した
のち常圧に戻し、しがるのち、該容器を加熱装置に移し
て１０Ｋｇ／ｃｆｆｌの圧力下で２時間の加圧を施すこ
とによって行った。In the injection process, first, the container containing the wood material is placed in a desiccator, held under a reduced pressure of 30 mmHg with an aspirator for 30 minutes, then the injection solution is introduced into the container, and the pressure is returned to normal pressure. This was carried out by transferring the container to a heating device and applying pressure under a pressure of 10 kg/cffl for 2 hours.
こうして樹脂注入処理された木質材を取り出して樹脂水
溶液の揮散防止のために遮光性有するア／Ｌ／ ミｆ５
により包被したのち、コバルト６ｏニよって線量率４
Ｘ１０３Ｇｙ／Ｈで適宜時間、Ｔ線の放射を行い、木質
材に注入されている樹脂水溶液を重合、硬化させた。In this way, the resin-injected wood material is taken out and has a light-shielding property A/L/Mi f5 to prevent the aqueous resin solution from volatilizing.
After being covered with cobalt 6o, the dose rate was 4
T-ray radiation was performed at X103 Gy/H for an appropriate time to polymerize and harden the resin aqueous solution injected into the wood material.
Ｔ線による照射後、該木質材を３日間放置してさらに内
部の樹脂硬化を進行させたのち、アルミ箔を除去し、し
かるのち、多量の水で木質材表面の未反応モノマーや酸
などを洗い落とし、減圧乾燥を行って脱水して合成樹脂
含浸硬化木質材を得た。After irradiation with T-rays, the wooden material was left for three days to allow the resin inside to harden, and then the aluminum foil was removed, and then unreacted monomers, acids, etc. on the surface of the wooden material were removed with a large amount of water. It was washed off and dehydrated by drying under reduced pressure to obtain a hardened wood material impregnated with a synthetic resin.
（実施例 ２つ
抱水クロラールを添加しているメラミン樹脂スミテック
ス・レジンＭ−３（住友化学株式会社製）を注入液とし
て使用し、上記実施例と同一条件で上記木質材に注入し
たのち、放射線の照射を行って合成樹脂含浸硬化木質材
を得た。(Example 2) A melamine resin Sumitex Resin M-3 (manufactured by Sumitomo Chemical Co., Ltd.) containing two chloral hydrates was used as an injection solution, and after injecting it into the above wood material under the same conditions as in the above example. A hardened wooden material impregnated with a synthetic resin was obtained by irradiation with radiation.
本発明の実施例における合成樹脂含浸硬化木質材は、表
面硬さが未処理木材に比べて２倍以上も増加しており、
従って、従来から柔らがいために重歩行用材として採用
できなかった針葉樹材でも、本発明による樹脂注入硬化
処理を施すことによってこれらの用途に適用できるもの
である。The hardened wooden material impregnated with synthetic resin in the examples of the present invention has a surface hardness more than twice that of untreated wood,
Therefore, even softwood materials that could not be used as materials for heavy walking due to their softness can be applied to these uses by applying the resin injection hardening treatment according to the present invention.
（発明の効果）
以上のように本発明の合成樹脂含浸硬化木質材の製造方
法は、木質材Ｏコ抱水クロラールを添加している縮重合
型樹脂水溶液を含浸させたのち、放射線を照射して前記
樹脂水溶液を重合、硬化させるものであり、尿素樹脂や
メラミン樹脂等の縮重合型樹脂が親水性樹脂であるから
成分の側鎖にＯＨ基を有する木質材との馴染み性が極め
て良く、そのため、該樹脂水溶液を木質材内の微細空隙
にまで浸透させることができるのは勿論、親水性樹脂は
ラジカル重合型樹脂に比べて安価であって、簡単に使用
できると共に溶剤として清水を用いるために環境汚染も
少な（てすみ、実用に適するものである。(Effects of the Invention) As described above, the method for producing a hardened wood material impregnated with a synthetic resin of the present invention involves impregnating the wood material with an aqueous condensation resin solution containing chloral hydrate, and then irradiating the wood material with radiation. The aqueous resin solution is polymerized and cured, and since polycondensation resins such as urea resins and melamine resins are hydrophilic resins, they have extremely good compatibility with wood materials having OH groups in the side chains of the components. Therefore, not only can the aqueous resin solution penetrate into the microscopic voids within the wood material, but hydrophilic resins are cheaper and easier to use than radical polymerization resins, and they use clean water as a solvent. It also causes less environmental pollution and is suitable for practical use.
さらに、縮重合型樹脂水溶液に抱水クロラールを添加し
ているので、放射線の照射によって始めて重合を開始さ
せることができ、従って、樹脂注入時や繰り返し使用に
よっても徐々に重合度が進むことなく、常時、低粘度を
保持して木質材内の微細空隙部まで円滑且つ確実に浸透
させることができる。Furthermore, since chloral hydrate is added to the condensation polymerization type resin aqueous solution, polymerization can only be started by irradiation with radiation. Therefore, the degree of polymerization does not gradually increase during resin injection or repeated use. It maintains a low viscosity at all times, allowing it to penetrate smoothly and reliably into the minute voids within the wood material.
又、このように放射線による重合であるから、木質材の
内部で抱水クロラールが励起されて樹脂の縮合重合が進
行し、従来のような熱等による重合反応に比べて、−旦
注入された樹脂溶液が社内で殆ど移動することなく、均
一な樹脂の硬化を達成し得るものであり、その上、尿素
やメラミン、フラン樹脂などはそれ自体が硬くて、上記
重合硬化処理により木質材の耐圧強度、表面強度を著し
く向上させることができるので、柔らかい針葉樹材から
なる木質材の改質にも極めて有効である。In addition, since polymerization is carried out by radiation, chloral hydrate is excited inside the wood material and condensation polymerization of the resin progresses. Uniform resin curing can be achieved with almost no movement of the resin solution within the company.In addition, urea, melamine, furan resins, etc. are hard in themselves, and the above polymerization curing process improves the pressure resistance of wood materials. Since the strength and surface strength can be significantly improved, it is also extremely effective for modifying wood materials made of soft coniferous materials.
Claims (1)
型樹脂水溶液を含浸させたのち、放射線を照射して前記
樹脂水溶液を重合、硬化させることを特徴とする合成樹
脂含浸硬化木質材の製造方法。(1) A synthetic resin-impregnated hardened wood material characterized by impregnating a wood material with an aqueous condensation resin solution containing chloral hydrate, and then irradiating the wood material with radiation to polymerize and harden the resin aqueous solution. manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33220590A JPH04197602A (en) | 1990-11-28 | 1990-11-28 | Manufacture of synthetic resin-impregnated cured wooden material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33220590A JPH04197602A (en) | 1990-11-28 | 1990-11-28 | Manufacture of synthetic resin-impregnated cured wooden material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04197602A true JPH04197602A (en) | 1992-07-17 |
Family
ID=18252355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33220590A Pending JPH04197602A (en) | 1990-11-28 | 1990-11-28 | Manufacture of synthetic resin-impregnated cured wooden material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04197602A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005533689A (en) * | 2002-07-26 | 2005-11-10 | ウッド ポリマー テクノロジーズ エーエスエー | Furan polymer impregnated wood |
-
1990
- 1990-11-28 JP JP33220590A patent/JPH04197602A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005533689A (en) * | 2002-07-26 | 2005-11-10 | ウッド ポリマー テクノロジーズ エーエスエー | Furan polymer impregnated wood |
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