JPS5825355B2 - Thailand - Google Patents

Thailand

Info

Publication number
JPS5825355B2
JPS5825355B2 JP13744875A JP13744875A JPS5825355B2 JP S5825355 B2 JPS5825355 B2 JP S5825355B2 JP 13744875 A JP13744875 A JP 13744875A JP 13744875 A JP13744875 A JP 13744875A JP S5825355 B2 JPS5825355 B2 JP S5825355B2
Authority
JP
Japan
Prior art keywords
phenol
adhesive
urea resin
urea
formaldehyde
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.)
Expired
Application number
JP13744875A
Other languages
Japanese (ja)
Other versions
JPS5260831A (en
Inventor
深沢厚
長谷行正
田村靖夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SUGYAMA SANGYO KAGAKU KENKYUSHO
Original Assignee
SUGYAMA SANGYO KAGAKU KENKYUSHO
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SUGYAMA SANGYO KAGAKU KENKYUSHO filed Critical SUGYAMA SANGYO KAGAKU KENKYUSHO
Priority to JP13744875A priority Critical patent/JPS5825355B2/en
Publication of JPS5260831A publication Critical patent/JPS5260831A/en
Publication of JPS5825355B2 publication Critical patent/JPS5825355B2/en
Expired legal-status Critical Current

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  • Compositions Of Macromolecular Compounds (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Description

【発明の詳細な説明】 本発明は合板など木材の接着に好適な耐水性接着剤組成
物に係わり、その目的とするところは、高度の耐煮沸水
性と水分散性を有し、作業性の良好な接着剤を提供する
ことにある。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water-resistant adhesive composition suitable for bonding wood such as plywood. Our goal is to provide a good adhesive.

従来、フェノール変性アミン樹脂は成型材料や積層材料
として使用されていたが、水に対する分散性が劣るため
木材の接着剤としてはあまり利用されていなかった。
Conventionally, phenol-modified amine resins have been used as molding materials and laminated materials, but because of their poor dispersibility in water, they have not been widely used as adhesives for wood.

しかるに、近年、構造用特類合板の需要拡大にともない
、高度の耐煮沸水性を有する接着剤が要求されるように
なり、フェノール樹脂接着剤に比べて作業性ならびに経
済性に優るフェノール変性アミン樹脂接着剤が高度の耐
煮沸水性を有する接着剤として大きく注目されるように
なってきた。
However, in recent years, with the increasing demand for special structural plywood, adhesives with a high degree of boiling water resistance have become required, and phenol-modified amine resins, which are superior in workability and cost efficiency compared to phenolic resin adhesives, have become necessary. Adhesives have been attracting a lot of attention as adhesives that have a high degree of boiling water resistance.

しかしながら、フェノール変性アミン樹脂接着剤は、水
分散性の問題を解決することが困難であり、ゆえに、フ
ェノール変性アミン樹脂接着剤を使用したグルーミキサ
ーやスプレッダ−等の装置を水洗する場合は、該接着剤
を使用した後に、さらに水分散性の良好なユリア樹脂接
着剤などを使用してユリア樹脂液で水分散性を助けるな
どの方法がとられている。
However, it is difficult to solve the problem of water dispersibility with phenol-modified amine resin adhesives, and therefore, when washing equipment such as glue mixers and spreaders using phenol-modified amine resin adhesives, After using the adhesive, a method is used in which a urea resin adhesive with good water dispersibility is used and the water dispersibility is aided with a urea resin liquid.

また、フェノール変性アミン樹脂接着剤は、フェノール
樹脂の縮合度が高くなると水分散性が極端に悪くなり、
使用中に分離し易くなる傾向があるため、フェノール樹
脂の縮合度をある程度以下に抑えることが必要となり、
それゆえ、接着剤が木材中に過度に浸透し易くなって欠
膠による接着不良を引き起したり、合板などのごとき木
材表面に汚染を生じたりするなどの欠点を生じ、従って
、接着する木材の乾燥を過度に行ない木材の含水率を低
くしておかねばならないなどの制約を生じている。
In addition, phenol-modified amine resin adhesives have extremely poor water dispersibility when the degree of condensation of the phenol resin increases.
Since it tends to separate easily during use, it is necessary to suppress the degree of condensation of the phenol resin to a certain level.
Therefore, the adhesive tends to penetrate excessively into the wood, resulting in poor adhesion due to lack of glue, and contamination of the wood surface such as plywood. This creates constraints such as the need to keep the moisture content of the wood low by excessively drying the wood.

本発明者らは、このようなフェノール変性アミン樹脂接
着剤における従来法の問題点を解決するため種々研究の
結果、フェノール樹脂を乳濁化せしめ、それを公知のユ
リア樹脂接着剤に混合することにより、高度の耐煮沸水
性を有し、かつ水分散性に優れた接着剤が得られること
を見出し、本発明を完成した。
In order to solve the problems of the conventional methods of phenol-modified amine resin adhesives, the present inventors have conducted various studies and found that they emulsified a phenol resin and mixed it with a known urea resin adhesive. It was discovered that an adhesive having a high degree of boiling water resistance and excellent water dispersibility could be obtained by this method, and the present invention was completed.

本発明において、公知のユリア樹脂接着剤に混合するフ
ェノール樹脂乳濁液は、フェノール1モルに対してホル
ムアルデヒド1〜4モルを公知の保護コロイド物質(例
えば、メチルセルロース、カルボキシメチルセルロース
、ヒドロキシエチルセルロースのごとき繊維素誘導体、
アクリルアマイド、ポリビニルアルコールなど)または
(および)界面活性剤の存在下において、金属酸化物、
もしくは金属水酸化物、あるいは金属塩、アンモニア、
アミンなどの1種または2種以上の触媒を加えて反応せ
しめ、任意の縮合度になったときに反応系のpHを下げ
るか、あるいは高度の縮合度まで反応を進めて乳濁化し
て得られるものである。
In the present invention, the phenolic resin emulsion to be mixed with the known urea resin adhesive contains 1 to 4 moles of formaldehyde per mole of phenol and a known protective colloid substance (for example, fibers such as methylcellulose, carboxymethylcellulose, and hydroxyethylcellulose). elementary derivatives,
acrylamide, polyvinyl alcohol, etc.) or (and) in the presence of surfactants, metal oxides,
or metal hydroxide, or metal salt, ammonia,
It can be obtained by adding one or more catalysts such as amines to cause a reaction and lowering the pH of the reaction system when a desired degree of condensation is reached, or by proceeding the reaction to a high degree of condensation and making it emulsified. It is something.

この際、フェノール1モルに対するホルムアルデヒドの
モル比が1モル以下となると得られたフェノール変性ユ
リア樹脂接着剤の硬化速度が遅くなり、作業性の低下を
来たし、一方、ホルムアルデヒドが4モル以上になると
得られたフェノール変性ユリア樹脂接着剤のホルムアル
デヒド臭が強くなり、作業環境を悪化せしめるばかりか
接着剤の保存性を低下せしめるので適当でない。
At this time, if the molar ratio of formaldehyde to 1 mole of phenol is less than 1 mole, the curing speed of the resulting phenol-modified urea resin adhesive will be slow, resulting in a decrease in workability, while on the other hand, if the formaldehyde content is 4 moles or more, The formaldehyde odor of the phenol-modified urea resin adhesive becomes strong, which not only worsens the working environment but also reduces the shelf life of the adhesive, which is not suitable.

フェノール樹脂乳濁液はフェノールの1部をメラミン、
ユリア、クレゾール、キシレノール、レソルシノール、
リグニン、タンニン等で代替シテ得た変性フェノール樹
脂乳濁液を使用しても本発明の効果を減少するものでな
い。
Phenol resin emulsion is made by replacing part of the phenol with melamine,
urea, cresol, xylenol, resorcinol,
Even if a modified phenolic resin emulsion substituted with lignin, tannin, etc. is used, the effects of the present invention will not be diminished.

また、公知のユリア樹脂接着剤は、ユリア単体とホルム
アルデヒドとを縮合して得たユリア樹脂接着剤を使用す
るものである。
Further, a known urea resin adhesive uses a urea resin adhesive obtained by condensing urea alone and formaldehyde.

ユリア樹脂接着剤とフェノール樹脂乳濁液の混合割合は
、任意の比率で混合できるが、ユリア樹脂接着剤100
重量部に対してフェノール樹脂乳濁液10〜300重置
部程度の範囲内において混合することが望ましい。
The mixing ratio of the urea resin adhesive and the phenolic resin emulsion can be any desired ratio, but the urea resin adhesive 100%
It is desirable to mix within a range of about 10 to 300 parts by weight of the phenol resin emulsion.

本発明方法により得られるフェノール変性ユリア樹脂接
着剤は合板の接着のみならず、パーティクルボードの接
着、ツキ板やフラッシュパネルの接着など広範な木材用
接着剤として有効に利用することができる。
The phenol-modified urea resin adhesive obtained by the method of the present invention can be effectively used not only for adhesion of plywood but also for a wide range of wood adhesives, such as adhesion of particle boards, veneer boards, and flash panels.

次に本発明の実施例を示す。Next, examples of the present invention will be shown.

実施例 l フェノール1モルとホルムアルデヒド2.5モルとの混
合液に酢酸亜鉛をフェノールに対して2重量係、ポリビ
ニルアルコール(KKクラレ製、ポバール1178)を
フェノールに対して10重重量添加し、25重重量苛性
ソーダ水溶液でpH8,6に調整して90℃で4時間反
応せしめ、白濁したところで冷却し、パラトルエンスル
ホン酸を徐々に加えてpH7,0に調整し、フェノール
樹脂乳濁液を得た。
Example 1 To a mixed solution of 1 mole of phenol and 2.5 moles of formaldehyde, 2 parts by weight of zinc acetate and 10 parts by weight of polyvinyl alcohol (Poval 1178, manufactured by KK Kuraray) were added to each part of the phenol. The pH was adjusted to 8.6 with a heavy weight caustic soda aqueous solution and reacted at 90°C for 4 hours. When it became cloudy, it was cooled, and para-toluenesulfonic acid was gradually added to adjust the pH to 7.0 to obtain a phenol resin emulsion. .

このフェノール樹脂乳濁液100重量部と市販のユリア
樹脂接着剤(豊年製油KK製、UL−002)100重
量部とを混合して本発明の耐水性接着剤を得た。
A water-resistant adhesive of the present invention was obtained by mixing 100 parts by weight of this phenol resin emulsion with 100 parts by weight of a commercially available urea resin adhesive (UL-002, manufactured by Hounen Oil Co., Ltd.).

本発明に係わる接着剤の耐水性と水分散性を下記の方法
により測定した。
The water resistance and water dispersibility of the adhesive according to the present invention were measured by the following method.

前記の方法により得た本発明の接着剤200gに小麦粉
(日清製粉KK製、赤花)50g、水20g1塩化アン
モニウム粉末1gを配合して糊液を調製した。
A glue solution was prepared by blending 200 g of the adhesive of the present invention obtained by the above method with 50 g of wheat flour (Akahana, manufactured by Nisshin Seifun KK), 20 g of water, and 1 g of ammonium chloride powder.

この糊液lOgをビーカーにとり、室温(28〜30°
C)にて3時間放置した後、100gの水を加えて攪拌
し、水分散性を観察したところ糊液は均一に分散し、良
好な水分散性を示した。
Take 10g of this glue solution in a beaker and put it at room temperature (28~30°
After being left to stand for 3 hours in C), 100 g of water was added and stirred, and the water dispersibility was observed. The size liquid was uniformly dispersed, showing good water dispersibility.

対照として、公知のユリア樹脂接着剤100重量部とレ
ゾール型フェノール樹脂初期縮合物50重量部とを混合
して得たフェノール変性ユリア樹脂接着剤を使用し、同
様な配合で製糊した糊液について同様な方法で水分散性
を調べたところ、糊液はガム状になって沈澱した。
As a control, we used a phenol-modified urea resin adhesive obtained by mixing 100 parts by weight of a known urea resin adhesive and 50 parts by weight of a resol-type phenolic resin initial condensate, and made a size liquid with the same composition. When the water dispersibility was examined in the same manner, the paste became gummy and precipitated.

一方、前記の方法により得た本発明の接着剤糊液を厚さ
2.5 mmのラワン単板の両面に40g/900dの
割合で塗布し、さらに厚さ2.5罷のラワン単板を土工
に重ね合わせて圧力10kg/fflで20分間冷圧圧
縮した。
On the other hand, the adhesive size liquid of the present invention obtained by the above method was applied to both sides of a 2.5 mm thick lauan veneer at a rate of 40 g/900 d, and then a lauan veneer with a thickness of 2.5 mm was coated. It was piled up on the earthwork and cold-pressed for 20 minutes at a pressure of 10 kg/ffl.

次いで、この合板を120℃の温度に保ったホットプレ
スにて10ky/iの圧力で3分間加熱圧着して構造用
合板を製造した。
Next, this plywood was heat-pressed for 3 minutes at a pressure of 10 ky/i using a hot press kept at a temperature of 120° C. to produce a structural plywood.

この合板の接着強さをJAS規格に準じて測定したとこ
ろ下表の結果を得た。
The adhesive strength of this plywood was measured according to JAS standards, and the results shown in the table below were obtained.

以上の測定結果より、本発明の接着剤は水分散性に優れ
、かつJAS特類親類規格格する高度の耐煮沸水性を有
するものであることがわかる。
From the above measurement results, it can be seen that the adhesive of the present invention has excellent water dispersibility and high boiling water resistance that meets the JAS special relatives standard.

Claims (1)

【特許請求の範囲】[Claims] 1 (イ)尿素単体とホルムアルデヒドとを縮合して得
られるユリア樹脂接着剤と、(ロ)フェノール1モルに
対してホルムアルデヒド1.0〜4.0モルをメチルセ
ルロース、カルボキシメチルセルロース、ヒドロキシエ
チルセルロース、アクリルアマイド、ポリビニルアルコ
ールのごとき保護コロイド物質または(および)界面活
性剤の存在下で反応を進め、乳濁化せしめて得たフェノ
ール樹脂乳濁液、とからなる耐水性接着剤組成物。
1 (a) A urea resin adhesive obtained by condensing simple urea and formaldehyde, and (b) 1.0 to 4.0 mol of formaldehyde per 1 mol of phenol to methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, acrylamide. , a phenolic resin emulsion obtained by reacting and emulsifying in the presence of a protective colloid substance such as polyvinyl alcohol or (and) a surfactant.
JP13744875A 1975-11-15 1975-11-15 Thailand Expired JPS5825355B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13744875A JPS5825355B2 (en) 1975-11-15 1975-11-15 Thailand

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13744875A JPS5825355B2 (en) 1975-11-15 1975-11-15 Thailand

Publications (2)

Publication Number Publication Date
JPS5260831A JPS5260831A (en) 1977-05-19
JPS5825355B2 true JPS5825355B2 (en) 1983-05-26

Family

ID=15198840

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13744875A Expired JPS5825355B2 (en) 1975-11-15 1975-11-15 Thailand

Country Status (1)

Country Link
JP (1) JPS5825355B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3346153C2 (en) * 1983-12-21 1994-04-07 Deutsche Texaco Ag, 2000 Hamburg Process for the production of modified phenolic resin wood binders and their application in the production of particle boards

Also Published As

Publication number Publication date
JPS5260831A (en) 1977-05-19

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