JPH02147685A - Cold-setting polyurethane adhesive for wood - Google Patents
Cold-setting polyurethane adhesive for woodInfo
- Publication number
- JPH02147685A JPH02147685A JP30261888A JP30261888A JPH02147685A JP H02147685 A JPH02147685 A JP H02147685A JP 30261888 A JP30261888 A JP 30261888A JP 30261888 A JP30261888 A JP 30261888A JP H02147685 A JPH02147685 A JP H02147685A
- Authority
- JP
- Japan
- Prior art keywords
- polyol
- component
- adhesive
- wood
- cold
- 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
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 53
- 239000000853 adhesive Substances 0.000 title claims abstract description 48
- 239000002023 wood Substances 0.000 title claims description 16
- 239000004814 polyurethane Substances 0.000 title claims description 14
- 229920002635 polyurethane Polymers 0.000 title claims description 14
- 229920005862 polyol Polymers 0.000 claims abstract description 40
- 150000003077 polyols Chemical class 0.000 claims abstract description 40
- 239000012948 isocyanate Substances 0.000 claims abstract description 17
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 15
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 15
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical class C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims abstract description 9
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims abstract description 8
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229920000538 Poly[(phenyl isocyanate)-co-formaldehyde] Polymers 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 230000000379 polymerizing effect Effects 0.000 claims abstract description 5
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims abstract description 4
- 125000000524 functional group Chemical group 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 19
- 239000000203 mixture Substances 0.000 abstract description 6
- 238000009998 heat setting Methods 0.000 abstract 1
- 238000001723 curing Methods 0.000 description 15
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 4
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 4
- 235000018185 Betula X alpestris Nutrition 0.000 description 3
- 235000018212 Betula X uliginosa Nutrition 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 2
- 239000004640 Melamine resin Substances 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000013008 moisture curing Methods 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000007718 adhesive strength test Methods 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
- C08G18/4812—Mixtures of polyetherdiols with polyetherpolyols having at least three hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/08—Polyurethanes from polyethers
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、木材の集成材などの接着に使用する常温硬化
型ポリウレタン接着剤に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a room temperature curing polyurethane adhesive used for adhering laminated wood and the like.
〈従来技術とその問題点〉
従来建材、家具、楽器等に用いられる木材用接着剤とし
ては、エリア樹脂系、メラミン樹脂系、フェノール樹脂
系等の熱硬化型樹脂系接着剤やウレタン系接着剤が広く
用いられている。<Prior art and its problems> Conventional wood adhesives used for building materials, furniture, musical instruments, etc. include thermosetting resin adhesives such as area resin, melamine resin, and phenol resin, and urethane adhesives. is widely used.
これらの接着剤のうちエリア樹脂系、メラミン樹脂系、
フェノール樹脂系は熱硬化性であるため耐熱接着性およ
び耐水接着性に優れているが、加熱を必要とするために
接着する木材に反りが発生し、寸法安定性に欠けるとと
もに、熱コスト的に不利であるという欠点がある。Among these adhesives, area resin type, melamine resin type,
Since phenolic resins are thermosetting, they have excellent heat- and water-resistant adhesion, but since they require heating, the wood to which they are bonded warps, lacks dimensional stability, and is expensive due to heat. It has the disadvantage of being disadvantageous.
このようなニーズから近年常温硬化型のポリウレタン系
接着剤、例えば常温硬化型の水性高分子−イソシアネー
ト系接着剤、湿気硬化型の１ ？ｆｔ性ポリウレタン接
着剤、２液性ポリウレタン接着剤等が提案されている。In response to these needs, in recent years room-temperature-curing polyurethane adhesives, such as room-temperature-curing water-based polymer-isocyanate adhesives, and moisture-curing type 1? FT polyurethane adhesives, two-component polyurethane adhesives, etc. have been proposed.
水性高分子−イソシアネート系接着剤は、接着強度は
十分な性能を有するが水系であるため、速硬化性に欠け
る。 また、湿気硬化型の１液性ポリウレタン接着剤は
、硬化に水分または湿分を必要とし、冬期の乾燥時には
、硬化不十分となったりまた多湿時には発泡を生じる等
の欠点を有する上に、接着強度、特に耐熱性に欠ける。Water-based polymer-isocyanate adhesives have sufficient adhesive strength, but because they are water-based, they lack fast curing properties. Moisture-curing one-component polyurethane adhesives require water or moisture for curing, and have the disadvantages of insufficient curing when dry in winter or foaming when humid. It lacks strength, especially heat resistance.
一方、２液性ポリウレタン接着剤は、比較的低分子量の
ポリオールとポリイソシアネートからなり、速硬化性を
有する利点があり、かつ常態の接着強度にも優れている
が、耐熱、耐水での接着力低下が激しく、集成材の接着
に用いても、屋外等、厳しい環境条件下での使用にたえ
ないので耐熱、耐水性の改善が望まれている。On the other hand, two-component polyurethane adhesives are composed of relatively low molecular weight polyols and polyisocyanates, and have the advantage of fast curing properties and excellent adhesive strength under normal conditions, but their adhesive strength under heat and water resistance is poor. The deterioration is severe, and even when used to bond laminated wood, it cannot withstand use under harsh environmental conditions such as outdoors, so improvements in heat resistance and water resistance are desired.
と、発明が解決しようとする課題〉
本発明の目的は、常態接着性、耐熱接着性および耐水接
着性に優れた常温硬化型の木材用接着剤を提供すること
にある。and Problems to be Solved by the Invention> An object of the present invention is to provide a room-temperature curing wood adhesive that has excellent normal adhesive properties, heat-resistant adhesive properties, and water-resistant adhesive properties.
く課題を解決するための手段〉
本発明者らは、かかる状況をかんがみ、本朝集成材用と
して速硬化性でかつ常態、耐熱、耐水接着性に優れた常
温硬化型２液性ポリウレタン接着剤を得るべく種々検討
を行った結果、本発明に至ったものである。In view of this situation, the present inventors have developed a two-component polyurethane adhesive that cures at room temperature and is fast-curing and has excellent normal, heat-resistant, and water-resistant adhesive properties for Honcho laminated wood. As a result of various studies aimed at obtaining the following, the present invention has been arrived at.
本発明は、ポリオール成分とイソシアネート成分とを含
有する２成分系の常温硬化型ポリウレタン接着剤に於て
、
（ａ）ポリオール成分が、ペンタエリスリトールにプロ
ピレンオキシドを付加重合させた水酸基価３８０〜６２
０のポリオール（Ａ）と、２．２′−ビス（４−ヒドロ
キシフェニル）プロパンにプロピレンオキシドを付加重
合させた水酸基価１９０〜３２５のポリオール（Ｂ）と
の混合物、
（ｂ）イソシアネート成分が常温液状で、平均官能基数
が２を越えるポリメチレンポリフェニルイソシアネート
、および／またはカルボジイミド変性４．４′−ジフェ
ニルメタンジイソシアネートであることを特徴とする木
材用常温硬化型ポリウレタン接着剤を提供する。The present invention provides a two-component cold-curing polyurethane adhesive containing a polyol component and an isocyanate component, in which (a) the polyol component is made by addition polymerizing pentaerythritol with propylene oxide and has a hydroxyl value of 380 to 62.
0 polyol (A) and a polyol (B) having a hydroxyl value of 190 to 325 obtained by addition polymerizing propylene oxide to 2,2'-bis(4-hydroxyphenyl)propane, (b) when the isocyanate component is at room temperature. To provide a cold-curing polyurethane adhesive for wood, which is liquid and is a polymethylene polyphenylisocyanate having an average functional group number of more than 2 and/or a carbodiimide-modified 4,4'-diphenylmethane diisocyanate.
ここで、前記ポリオール（Ａ）と前記ポリオール（Ｂ）
との混合比が重量比で３０／７０〜９０／１０であるの
が好ましい。Here, the polyol (A) and the polyol (B)
It is preferable that the mixing ratio is 30/70 to 90/10 by weight.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明の木材用接着剤は、ポリオール成分とイソシアネ
ート成分とを含有する２成分常温硬化型のポリウレタン
系接着剤である。The wood adhesive of the present invention is a two-component room temperature curing polyurethane adhesive containing a polyol component and an isocyanate component.
ポリオール成分は下記のポリオール（Ａ）とポリオール
（Ｂ）とを含有する。The polyol component contains the following polyol (A) and polyol (B).
ポリオール（Ａ）はペンタエリスリトールにプロピレン
オキシドを付加し、末端に水酸基を有する水酸基価が３
８０〜６２０のもので、好ましくは３８０〜４８０のも
のである。Polyol (A) is obtained by adding propylene oxide to pentaerythritol, and has a hydroxyl group at the end and a hydroxyl value of 3.
80 to 620, preferably 380 to 480.
水酸基価を３８０〜６２０とするのは３８０未満では、
接着性能が不十分であり、６２０を越えるとポリオール
（Ａ）が結晶化するためポリオール成分とインシアネー
ト成分の反応が完結しずらくなるからである。Setting the hydroxyl value to 380 to 620 is less than 380,
This is because the adhesive performance is insufficient, and if it exceeds 620, the polyol (A) will crystallize, making it difficult to complete the reaction between the polyol component and the incyanate component.
また、上記のようなポリオールを用いるのは十分な接着
力を得るためである。Further, the reason for using the above polyol is to obtain sufficient adhesive strength.
このようなポリオール（Ａ）は、下記構造式％式％ である。Such polyol (A) has the following structural formula % formula % It is.
ポリオール（Ｂ）は２．２′−ビス（４−ヒドロキシフ
ェニル）プロパンにプロピレンオキシドを付加し、末端
に水酸基を有する水酸基価が１９０〜３２５のもので、
好ましくは、１９０〜２５０のものである。Polyol (B) is obtained by adding propylene oxide to 2,2'-bis(4-hydroxyphenyl)propane, has a hydroxyl group at the end, and has a hydroxyl value of 190 to 325.
Preferably, it is 190-250.
水酸基価が１９０〜３２５とするのは、１９０未満では
接着性能が不十分であり、３２５を越えるとポリオール
成分とイソシアネート成分の反応が完結しずらくなるか
らである。The reason why the hydroxyl value is 190 to 325 is because if it is less than 190, the adhesive performance is insufficient, and if it exceeds 325, it becomes difficult to complete the reaction between the polyol component and the isocyanate component.
また、上記のように官能基を２個有するポリオール（Ｂ
）を用いるのは、ポリオール（Ａ）とイソシアネート成
分との相溶性を改良し、充分な接着力を得るためである
。In addition, as mentioned above, a polyol having two functional groups (B
) is used in order to improve the compatibility between the polyol (A) and the isocyanate component and to obtain sufficient adhesive strength.
このようなポリオール（Ｂ）は、下記構造式％式％
本発明においては、好ましくは、ポリオール（Ａ）とポ
リオール（Ｂ）との配合比を重量比で３０／７０〜９０
／１０となるようにする。Such polyol (B) has the following structural formula % formula % In the present invention, preferably, the blending ratio of polyol (A) and polyol (B) is 30/70 to 90 by weight.
/10.
このような配合比とするのは、この範囲外では架橋密度
の低下、相溶性の低下等のため十分な接着性能が得られ
ないからである。The reason why such a compounding ratio is used is that, outside this range, sufficient adhesive performance cannot be obtained due to a decrease in crosslinking density, a decrease in compatibility, and the like.
本発明の接着剤のポリオール成分には必須成分ポリオー
ル（Ａ）および（Ｂ）の他に必要により任意成分を配合
することができる。In addition to the essential polyols (A) and (B), optional components may be added to the polyol component of the adhesive of the present invention, if necessary.
このような任意成分としては、物性改良および増量等の
目的の充填剤（炭酸カルシウム、硫酸バリウム、タルク
、クレイ、マイカ等）反応促進、工程管理等の目的の触
媒（トリエチレンジアミン、ジブチルチンシラクレー１
・等）その他、着色剤、吸水剤、沈降防止剤、老化防止
剤等が例示できる。Such optional components include fillers (calcium carbonate, barium sulfate, talc, clay, mica, etc.) for the purpose of improving physical properties and increasing volume, and catalysts (triethylenediamine, dibutyltinsilacrylate, etc.) for the purpose of promoting reactions and controlling processes. 1
・etc.) Other examples include colorants, water-absorbing agents, anti-settling agents, and anti-aging agents.
本発明のイソシアネート成分における必須成分のイソシ
アネートとしては、常温液状で平均官能基数が２を越え
るポリメチレンポリフェニルイソシアネートまたはカル
ボジイミド変性した４、４′−ジフェニルメタンジイソ
シアネートが使用される。As the essential isocyanate in the isocyanate component of the present invention, polymethylene polyphenylisocyanate which is liquid at room temperature and has an average functional group number of more than 2 or carbodiimide-modified 4,4'-diphenylmethane diisocyanate is used.
具体的には、ポリメチレンポリフェニルイソシアネート
は、−殻構造式
で表わされるクルードＭＤＩの混合物が例示される。Specifically, polymethylene polyphenylisocyanate is exemplified by a mixture of crude MDI represented by a -shell structural formula.
カルボジイミド変性した４、４′−ジフェニルメタンジ
イソシアネートは、具体的には下記の一般構造式の化合
物の混合物が例示される。A specific example of the carbodiimide-modified 4,4'-diphenylmethane diisocyanate is a mixture of compounds having the following general structural formula.
また必須成分のイソシアネートは、必要に応じ上記２種
のイソシアネート混合物を用いることが出来る。Further, as the essential component isocyanate, a mixture of the above two types of isocyanates can be used as necessary.
本発明の接着剤において、ポリオール成分とイソシアネ
ート成分とは、イソシアネート成分のＮＧＯ基とポリオ
ール成分のＯＨ基との比（ＮＣＯ基１０Ｈ基）が１．０
〜１．７、好ましくは１．２〜１．４となるように配合
する。In the adhesive of the present invention, the polyol component and the isocyanate component have a ratio of NGO groups in the isocyanate component to OH groups in the polyol component (NCO group 10H group) of 1.0.
-1.7, preferably 1.2-1.4.
この範囲外では、耐水性、耐熱性の接着性能が低下して
くる。Outside this range, water resistance and heat resistance adhesive performance will deteriorate.
このようにして得られる本発明の木材用接着剤は、特に
、構造用集成材の接着剤として建材、家具、楽器等に好
適に用いられる。The wood adhesive of the present invention obtained in this manner is particularly suitable for use as an adhesive for structural laminated timber for building materials, furniture, musical instruments, and the like.
この場合の塗布量は１００〜２５０ ｇ／ｍ２程度とす
ればよい。In this case, the coating amount may be approximately 100 to 250 g/m2.
例えば、接着しにくい木材とされるカバ材に適用しても
、各接着性を指標する下記の接着力で示される要求特性
を充分満足することができる。For example, even when applied to birch wood, which is a wood that is difficult to adhere to, it is possible to fully satisfy the required properties shown by the adhesion strength below, which is an index of each adhesive property.
接着性 剪断接着力
常態 １３（ｌ ｋｇｆ／ｃｍ’
以上耐熱（１００℃） １１０ ｋｇｆ／ｃ
ｍ’以上耐水（６０℃温水） ９０ ｋｇｆ
／ｃ＋ａ”以上〈実施例〉
以下に、実施例および比較例を示し、本発明を具体的に
説明するが、本発明は、これに限定されるものではない
。Adhesion Shear adhesive strength normal condition 13 (l kgf/cm'
Heat resistance (100℃) 110 kgf/c
Water resistant over m' (60℃ warm water) 90 kgf
/c+a'' or more <Example> The present invention will be specifically explained below by showing Examples and Comparative Examples, but the present invention is not limited thereto.
実施例および比較例で行った接着剤調整法、試験片作製
法および各種の圧縮剪断接着力試験法は以下の通りであ
る。The adhesive preparation method, test piece preparation method, and various compression shear adhesive strength test methods performed in Examples and Comparative Examples are as follows.
（１）接着剤調整法
各種の水酸基価を有するポリオール（Ａ）とポリオール
（Ｂ）とを計量し、ＩＩＬの三ツロフラスコにそれぞれ
投入し配合した。 その後１００℃ａｍｍＨｇ下で３時
間撹拌脱水し、水分率１１００ｐｐ以下にした。 こ
れにトリエチレンジアミンの３３％ジプロピレングリコ
ール溶液を加え十分撹拌混合し、主剤を調製した。(1) Adhesive Preparation Method Polyols (A) and polyols (B) having various hydroxyl values were weighed and put into a Mitsuro flask of IIL and blended. Thereafter, the mixture was stirred and dehydrated at 100°C under ammHg for 3 hours to reduce the moisture content to 1100 pp or less. A 33% dipropylene glycol solution of triethylene diamine was added to this and thoroughly stirred and mixed to prepare a main ingredient.
硬化剤は、ポリメチレンポリフェニルイソシアネート（
クルードＭＤＩ：ＮＣＯ基含有率３１％）と
カルボジイミド変性４．４′−ジフェニルメタンジイソ
シアネート（液状ＭＤＩ：ＮＣＯ基含有率２９％）とを
用いた。The curing agent is polymethylene polyphenylisocyanate (
Crude MDI (NCO group content: 31%) and carbodiimide-modified 4,4'-diphenylmethane diisocyanate (liquid MDI: NCO group content: 29%) were used.
この主剤と硬化剤とを２液少量計量混合装置を用いてイ
ソシアネート基／水酸基のモル比で１．２となるように
計量混合した。This main agent and curing agent were measured and mixed using a two-liquid small quantity metering and mixing device so that the molar ratio of isocyanate groups to hydroxyl groups was 1.2.
（２）試験片作製法
（１）項で得られた接着剤をＪＩＳに６８５２に準拠し
た試験片カバ柾目材（２５ｍｍｘ ３０ｍｍｘ１０＋ｎ
ａ＋）に接着面積が２５ｍｍｘ ２５ｍｍになるように
塗布し、５ ｋｇｆ／ｃｍ’の圧力で１５分間圧締した
。 塗布量は１００〜１５０ ｇ／ｍ’とした。(2) Test piece preparation method The adhesive obtained in section (1) was prepared using a JIS 6852-compliant test piece birch straight grain material (25 mm x 30 mm
a+) so that the adhesive area was 25 mm x 25 mm, and the adhesive was pressed at a pressure of 5 kgf/cm' for 15 minutes. The coating amount was 100 to 150 g/m'.
なお、試験片カバ柾目材は含水率６〜１２％に調湿した
ものを使用した。The birch straight-grained test pieces used had been adjusted to have a moisture content of 6 to 12%.
解圧した試験片を２０℃で４８時間以上養生した。The depressurized test piece was cured at 20°C for 48 hours or more.
（３）各種の圧縮剪断接着力試験法
（ｉ）常態試験
（２）項で得られた試験片をＪＩＳに６８５２ （１９
７６）に従いそのままの状態で試験した。(3) Various compression shear adhesion test methods (i) Normal test The test pieces obtained in section (2) were rated according to JIS 6852 (19
76) and tested as is.
（ｉ ｉ）耐温水試験
ＪＩＳに６８５２ （１９７６）に従い、６０℃恒温水
中に３時間浸漬後、室温の水中に冷めるまで浸し、ぬれ
たままの状態で試験した。(ii) Hot water resistance test According to JIS 6852 (1976), the test piece was immersed in constant temperature water at 60°C for 3 hours, then immersed in water at room temperature until cooled, and tested while still wet.
（ｆｉｉ）耐熱試験
１００℃恒温空気中に２４時間放置後、そのまま１００
℃下で試験した。(fii) Heat resistance test After being left in constant temperature air at 100℃ for 24 hours,
Tested at ℃.
接着力の目標値は下記に示すとおりである。The target value of adhesive strength is as shown below.
常 態： １３０ ｋｇｆ／ｃｍ２以上耐 熱＋ １１
０ ｋｇｆ／ｃｍ２以上耐温水： ９０ ｋｇｆ／ｃ
ｍ’以上実施例、比較例の圧縮剪断接着力は、試験片５
ケについての接着力の平均値で示した。Normal state: 130 kgf/cm2 or more Heat resistance + 11
0 kgf/cm2 or more hot water resistance: 90 kgf/c
m' or more The compression shear adhesive strength of Examples and Comparative Examples is test piece 5.
It is shown as the average value of adhesive strength for .
果を第１表および第２表に示す。The results are shown in Tables 1 and 2.
結
表に示す結果より、実施例１〜７は、常態接着性、耐熱
接着性および耐水接着性のすべての要求特性を満足する
ことが確記される。From the results shown in the table, it is confirmed that Examples 1 to 7 satisfy all the required properties of normal adhesion, heat-resistant adhesion, and water-resistant adhesion.
また、木材には反りの発生もなかった。Further, no warpage occurred in the wood.
〈発明の効果〉
本発明によれば、常態接着性、耐熱接着性および耐水接
着性に優れた木材用接着剤が得られる。 このものは常
温硬化型であるため、加熱硬化型のものと異なり、構造
用集成材に適用しても反りが発生せず寸法安定性に優れ
る。<Effects of the Invention> According to the present invention, a wood adhesive having excellent normal adhesiveness, heat-resistant adhesiveness, and water-resistant adhesiveness can be obtained. Since this product is a room temperature curing type, unlike a heat curing type, it does not warp even when applied to structural laminated timber and has excellent dimensional stability.
Claims (2)
る２成分系の常温硬化型ポリウレタン接着剤に於て、 （ａ）ポリオール成分が、ペンタエリスリトールにプロ
ピレンオキシドを付加重合させた水酸基価３８０〜６２
０のポリオール（Ａ）と、２，２′−ビス（４−ヒドロ
キシフェニル）プロパンにプロピレンオキシドを付加重
合させた水酸基価１９０〜３２５のポリオール（Ｂ）と
の混合物、 （ｂ）イソシアネート成分が常温液状で、平均官能基数
が２を越えるポリメチレンポリフェニルイソシアネート
、および／またはカルボジイミド変性４，４′−ジフェ
ニルメタンジイソシアネートであることを特徴とする木
材用常温硬化型ポリウレタン接着剤。(1) In a two-component cold-curing polyurethane adhesive containing a polyol component and an isocyanate component, (a) the polyol component is made by addition polymerizing pentaerythritol with propylene oxide and has a hydroxyl value of 380 to 62.
0 polyol (A) and a polyol (B) with a hydroxyl value of 190 to 325 obtained by addition polymerizing propylene oxide to 2,2'-bis(4-hydroxyphenyl)propane, (b) isocyanate component at room temperature A cold-curing polyurethane adhesive for wood, which is liquid and is a polymethylene polyphenylisocyanate having an average number of functional groups exceeding 2 and/or a carbodiimide-modified 4,4'-diphenylmethane diisocyanate.
の混合比が重量比で３０／７０〜９０／１０である請求
項１記載の木材用常温硬化型ポリウレタン接着剤。(2) The room temperature curing polyurethane adhesive for wood according to claim 1, wherein the mixing ratio of the polyol (A) and the polyol (B) is from 30/70 to 90/10 by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30261888A JPH02147685A (en) | 1988-11-30 | 1988-11-30 | Cold-setting polyurethane adhesive for wood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30261888A JPH02147685A (en) | 1988-11-30 | 1988-11-30 | Cold-setting polyurethane adhesive for wood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02147685A true JPH02147685A (en) | 1990-06-06 |
Family
ID=17911151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30261888A Pending JPH02147685A (en) | 1988-11-30 | 1988-11-30 | Cold-setting polyurethane adhesive for wood |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02147685A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5643983A (en) * | 1995-08-30 | 1997-07-01 | Ashland Inc. | Moisture curable 100% solids one component plywood adhesive |
| JP2007077206A (en) * | 2005-09-12 | 2007-03-29 | Oshika:Kk | Highly water-resistant adhesive composition |
| JP2020041103A (en) * | 2018-09-13 | 2020-03-19 | Dic株式会社 | Two-component adhesive, laminated film and package |
-
1988
- 1988-11-30 JP JP30261888A patent/JPH02147685A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5643983A (en) * | 1995-08-30 | 1997-07-01 | Ashland Inc. | Moisture curable 100% solids one component plywood adhesive |
| JP2007077206A (en) * | 2005-09-12 | 2007-03-29 | Oshika:Kk | Highly water-resistant adhesive composition |
| JP4585948B2 (en) * | 2005-09-12 | 2010-11-24 | 株式会社オーシカ | Highly water-resistant adhesive composition |
| JP2020041103A (en) * | 2018-09-13 | 2020-03-19 | Dic株式会社 | Two-component adhesive, laminated film and package |
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