JP2020510108A - 低モノマージイソシアネート含有量を有する反応性ホットメルトポリウレタン接着剤 - Google Patents
低モノマージイソシアネート含有量を有する反応性ホットメルトポリウレタン接着剤 Download PDFInfo
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- JP2020510108A JP2020510108A JP2019547349A JP2019547349A JP2020510108A JP 2020510108 A JP2020510108 A JP 2020510108A JP 2019547349 A JP2019547349 A JP 2019547349A JP 2019547349 A JP2019547349 A JP 2019547349A JP 2020510108 A JP2020510108 A JP 2020510108A
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- hot melt
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Classifications
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Abstract
Description
本発明は、約2以上の官能価を有する多官能イソシアネート及びポリオールから誘導されたイソシアネート官能性プレポリマーと、活性水素有機官能性シランと、活性水素非シランキャッピング剤と、熱可塑性ポリマーと、を含む反応性ホットメルト組成物を含む。
イソシアネート官能性プレポリマーは、約2以上の官能価を有する多官能イソシアネート及びポリオールから誘導される。
多官能性イソシアネートは、約2以上の官能価を有する。一実施形態では、官能価は2であり得る。イソシアネートは、芳香族又は脂肪族であってもよい。芳香族イソシアネートの代表的な例としては、ジフェニルメチレンジイソシアネート(methylene diisocyanate、MDI)、テトラメチルキシレンジイソシアネート、ナフタレンジイソシアネート、トルエンジイソシアネートが挙げられる。脂肪族ジイソシアネートの代表的な例としては、ヘキサメチレンジイソシアネート、イソホロンジイソシアネート、水素添加MDI、ドデカンジイソシアネート、及びポリマーイソシアネートが挙げられる。実施形態では、イソシアネートとしては、MDI、テトラメチルキシレンジイソシアネート、イソホロンジイソシアネート、トルエンジイソシアネート、ヘキサメチレンジイソシアネート、キシレンジイソシアネート、又はこれらの混合物を挙げることができる。一実施形態では、イソシアネートは、MDIである。
ポリオールは、ポリエーテルポリオール、ポリエステルポリオール、ダイマー酸系ポリオール、又はこれらの混合物を含むことができる。一実施形態では、ポリオールは固体である。別の実施形態では、ポリオールのうちの少なくとも1つはポリエステルである。ポリオールは、2以上、又は更には約2〜約4の官能価を有し得る。
ポリウレタンプレポリマーのイソシアネート基と反応性である少なくとも1つの官能基(例えば、水素)を含み、かつ少なくとも1つのシリル基を有する、任意の活性水素有機官能性シランを使用することができる。有用なシリル基の例としては、アルコキシシリル、アリールオキシシリル、アルキルオキシイミノシリル、オキシムシリル、及びアミノシリルが挙げられる。好ましい活性水素有機官能性シランとしては、例えば、二級アミノ−アルコキシシラン(例えば、メトキシアミノシラン)及びメルカプト−アルコキシシランが挙げられる。
活性水素非シランキャッピング剤は、ヒドロキシル、アミン、チオール、及びこれらの組み合わせからなる群から選択される活性水素反応性基を含む、シランを含まない成分である。
反応性ホットメルト接着剤組成物は、熱可塑性ポリマーを含む。熱可塑性ポリマーとしては、活性水素基を含まないポリマー、及び個々の成分として熱可塑性であるが熱可塑性ポリマーをウレタンプレポリマーと反応させることを可能にする活性水素基を含むポリマーが挙げられる。
反応性ホットメルト接着剤組成物は、残留ヒドロキシル又は酸官能基を有さない粘着付与剤を含むことができる。
接着剤は、可塑剤を含んでもよい。可塑剤は、室温で固体又は液体であり得る。
接着剤は、触媒を含んでもよい。好適な触媒は、ポリオールとポリイソシアネートとの間の反応、加水分解、及び/又はシラン基、イソシアネート基、又はこれらの組み合わせの後続の架橋反応を促進する。有用な触媒としては、例えば、例えば、2−2−ジモルホリノジエチルエーテル(dimorpholinodiethylether、DMDEE)、例えば、N,N−ジメチルアミノエタノール、N,N−ジメチル−シクロヘキサミン−ビス(2−ジメチルアミノエチル)エーテル、N−エチルモルホリン、N,N,N’,N’,N”−ペンタメチル−ジエチレントリアミン、及び1−2(ヒドロキシプロピル)イミダゾールを含む三級アミン、並びに、例えば、スズ(例えば、ジアルキルスズジカルボキシレート、例えば、ジブチルスズジラウレート及びジブチルスズジアセテート、カルボン酸第一スズ塩、例えばオクタン酸第一スズ及び酢酸第一スズ、テトラブチルジオルトジスタンノキサン)、チタン化合物、カルボン酸ビスマス、チタン酸有機ケイ素、チタン酸アルキル、及びこれらの組み合わせを含む金属触媒が挙げられる。反応性ホットメルト接着剤組成物は、2つ以上の触媒を含むことができる。
接着剤は、任意選択的に、例えば、酸化防止剤、接着促進剤、紫外線安定剤、触媒、レオロジー変性剤、殺生物剤、腐食防止剤、脱水剤、有機溶媒、着色剤(例えば、顔料及び染料)、充填剤、界面活性剤、難燃剤、ワックス、シラン変性粘着付与剤、及びこれらの混合物が挙げられる他の成分を含むことができる。
開示された接着剤組成物と共に使用するために適切な基材は、例えばガラス、金属、ポリカーボネート、アクリル、ABS、PVC、ビニル、木材、その他を含むことができる。開示された接着剤組成物は、有利にも、積層された物品の製作にも使用することができる。
粘度
粘度を、Thermosel(商標)試料ヒーターを備えるブルックフィールドDV−II+粘度計で決定した。#27スピンドルを、速度の20〜80%の目盛りであった読みを与えるように設定された速度で使用した。接着剤試料を、小さな金属缶内に密閉されたオーブン内で、必要な温度まで加熱した。スピンドル及び接着剤チャンバを、Thermosel(商標)中で必要な温度まで予熱した。適切な量の溶融接着剤を、チャンバに添加した。スピンドルを粘度計に取り付け、作動させた。15〜20分後、粘度の読み取りを行った。
200〜500グラムの接着剤をオーブン内で必要な温度まで予熱した。次いで、接着剤をUnion Toolの幅66cmの加熱されたロールコータ上に置き、特定の温度で走行させ、温度制御された建物内で周囲空気に1時間曝した。1時間の終了時に、接着剤の試料をロールコータから取り出し、その粘度を測定した。エージングさせた試料も、ゲルについて評価した。
最初の生強度は、第1の2.54cm(1インチ)の立方体のオーク木材キューブの1つの面に0.1ミリリットル(ml)の溶融*接着剤を塗布し、同じサイズの第2の立方体の1つの面を第1のキューブに押し付けることによって決定した。このキューブを、手圧力を30秒間適用することによって一緒に保持した。次いで、試料を室温で10分間エージングした。
*(比較実施例2−121℃(250°F)で適用し、比較例1及び全ての実施例−162.7℃(325℃)で適用した)
接着剤を一定温度オーブン内で予熱*した。次いで、接着剤をロールコータに注ぎ、135℃の温度で3.81cm(1.5インチ)×12.7cm(5.0インチ)×1.91cm(0.75インチ)の松材片に10〜12.5グラム/平方フィート(gsf)のコーティング量でコーティングした。6.35cm(2.5インチ)×2.54cm(1インチ)×0.318cm(0.125インチ)の大きさを有する火炎処理された繊維強化プラスチック(FRP)基材を、コーティングした松材の上に押圧して2.54cmのオーバーラップ接合を形成した。接着剤をコーティングした30秒後に、接合した基材を60psiニップローラーに3回通過させた。
*(比較例2−121℃(250°F)で予熱し、比較例1及び全ての実施例を162.7℃(325°F)で予熱しで予熱した)
重なり剪断結合調製試験方法に従って、結合部を調製した。10分間エージングした後、重なり剪断を、力計に取り付けられた剪断モジュールに挿入された1インチのFRPと共にImada引張試験機に配置し、ピン基材をバイスにクランプした。接着破壊のピーク荷重を記録した。記録された値は、3つの結合の平均である。
重なり剪断結合調製試験方法に従って、結合部を調製した。結合部を25℃及び相対湿度50%で4週間硬化させた。金属クリップを使用して、500グラムの荷重をFRP基材に取り付けた。取り付けられた荷重を有する試験片を100℃に設定したオーブンに装填し、接着結合破壊までの時間を記録した。記録された値は、1つの結合部の結果である。
工程1:ポリウレタンプレポリマーの調製
全ての実施例におけるポリウレタンプレポリマーは、ポリオールとMODAFLOW RESINモダプラウ樹脂とを、120℃の温度で1時間、真空下で混合することによって調製した。次いで、70℃で溶融MDIを加え、真空下で1〜3時間混合した。
熱可塑性ポリマー(複数可)、可塑剤、及び粘着付与剤を、177℃の温度で均一になるまで溶融状態でブレンドした。次に、120℃で予熱した工程1からのポリウレタンプレポリマーを添加し、全混合物の温度を120℃に下げながら、真空下で混合を1〜3時間続けた。次いで、触媒及び任意の追加の材料、例えば、二級アミノシラン、ジボタルアミン、ヒドロキシエチルオキサゾリジンを添加し、接着剤を更に30分間〜1時間混合した。
上記の方法に従って製造した予熱したポリウレタンプレポリマーに、触媒(JEFFCAT DMDEE)、SILQUEST A−15及びジブチルアミンを添加し、120℃で1〜3時間混合した。
Claims (15)
- 反応性ホットメルト接着剤組成物であって、
a.約2以上の官能価を有する多官能性イソシアネート及びポリオールから誘導されたイソシアネート官能性プレポリマーと、
b.活性水素有機官能性シランと、
c.活性水素非シランキャッピング剤と、
d.熱可塑性ポリマーと、を含む、反応性ホットメルト接着剤組成物。 - 滴定によって測定したときに、0.1重量%未満のイソシアネート含有量を有する、請求項1に記載の反応性ホットメルト接着剤組成物。
- 分析前にモノマージイソシアネートを発色団で誘導体化する、UV検出による高速液体クロマトグラフィー(HPLC)によって測定したときに、0.002重量%以下の前記モノマージイソシアネート含有量を有する、請求項1に記載の反応性ホットメルト接着剤組成物。
- 前記プレポリマー中のシラン反応基対非シラン反応基当量比が、1:5〜5:1である、請求項1に記載の反応性ホットメルト接着剤組成物。
- 粘着付与剤を更に含む、請求項1に記載の反応性ホットメルト接着剤組成物。
- 前記熱可塑性ポリマーが、ポリエーテルポリエステルブロックコポリマー、ポリウレタン、ビニルポリマー、及びアクリルポリマーからなる群から選択される、請求項1に記載の反応性ホットメルト接着剤組成物。
- 少なくとも2つの異なる熱可塑性ポリマーを含む、請求項1に記載の反応性ホットメルト接着剤組成物。
- ポリエーテルポリエステルブロックコポリマーとビニルポリマーとを含む、請求項7に記載の反応性ホットメルト接着剤組成物。
- 前記粘着付与剤が、芳香族炭化水素樹脂である、請求項5に記載の反応性ホットメルト接着剤組成物。
- 可塑剤を更に含む、請求項1に記載の反応性ホットメルト接着剤組成物。
- 前記プレポリマーが、室温で固体である、請求項1に記載の反応性ホットメルト接着剤組成物。
- 前記有機官能性シランが、アミノシランである、請求項1に記載の反応性ホットメルト接着剤組成物。
- 前記活性水素非シランキャッピング剤が、ヒドロキシル官能性オキサゾリジン、二級アミノ官能性アルカン、モノアルコール、ジオール、トリオール、チオール、非フェノール性ヒドロキシル基含有粘着付与剤、及びフェノール変性粘着付与剤からなる群から選択される、請求項1に記載の反応性ホットメルト接着剤組成物。
- 前記活性水素非シランキャッピング剤が、2〜12個の炭素の鎖長を有する、請求項1に記載の反応性ホットメルト接着剤組成物。
- 触媒を更に含む、請求項1に記載の反応性ホットメルト接着剤組成物。
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- 2018-03-09 KR KR1020197025110A patent/KR102516538B1/ko active IP Right Grant
- 2018-03-09 EP EP18714897.8A patent/EP3592818B1/en active Active
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US20180258330A1 (en) | 2018-09-13 |
CA3051453C (en) | 2022-05-24 |
WO2018165546A1 (en) | 2018-09-13 |
MX2019010607A (es) | 2019-10-17 |
KR20190124225A (ko) | 2019-11-04 |
EP3592818B1 (en) | 2022-12-14 |
CN110382649B (zh) | 2022-04-12 |
EP3592818A1 (en) | 2020-01-15 |
AU2018230473A1 (en) | 2019-08-08 |
US10787596B2 (en) | 2020-09-29 |
CA3051453A1 (en) | 2018-09-13 |
JP7394624B2 (ja) | 2023-12-08 |
PL3592818T3 (pl) | 2023-04-11 |
CN110382649A (zh) | 2019-10-25 |
KR102516538B1 (ko) | 2023-03-30 |
AU2018230473B2 (en) | 2023-01-12 |
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