<b>Influence of Network Structure on the Hydrolysis Resistance ofMoisture Curable Adhesive Derved from Vegetable-Oil </b>

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  • INUI Jun
    R&D　Div. Research Laboratory, Konishi Co., Ltd. Molecular Engineering Institute, Kinki University
  • SATO Shinichi
    R&D　Div, Urawa Institute, Konishi Co., Ltd.
  • MATSUMOTO Kozo
    Faculty of Humanity-Oriented Science and Engneering, Kinki University
  • ENDO Takeshi
    Molecular Engineering Institute, Kinki University

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Other Title
  • <b>植物油脂からの湿気硬化型接着剤の設計と </b><b>架橋構造の耐加水分解性への影響 </b>
  • 植物油脂からの湿気硬化型接着剤の設計と架橋構造の耐加水分解性への影響
  • ショクブツ ユシ カラ ノ シッケ コウカガタ セッチャクザイ ノ セッケイ ト カケハシ コウゾウ ノ タイカスイブンカイセイ エ ノ エイキョウ

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Abstract

Bio-mass based curable resins having triethoxysilyl groups (bio-mass based silane terminated resins) were synthesized from castor oil (bio-mass polyol) and 3-isocyanatopropyltriethoxysilane. Dibutyltin dimethoxide (DBTDM) or boron trifluoride-monoethylamine complex (BF3－MEA) as a curing catalyst was blended with the bio-mass based silane terminated resin and 3-aminopropyltriethoxysilane to afford curable compositions. The cured products of the compositions were exposed to water at 80℃. The hydrolytic degradation was evaluated by IR spectroscopy. It was found that the both ester and urethane bonds in the cured compositions using BF3－MEA were more stable than those using DBTDM even after exporsed to water at 80℃. It was also found that resins cured by DBTDM were more susceptible to hydrolysis than uncured resins. BF3－MEA exhibited high catalytic activity, and the obtained materials showed almost the same adhering properties as those cured by DBTDM. It was expected that BF3－MEA can be a promising catalyst for bio-mass based silane terminated resin, and widely applicable to adhesives, sealants, and coatings.

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