To provide a bound stopper having high mechanical strength, excellent in durability against fatigue breakdown or settling upon repeatedly receiving large load, and further capable of being simply manufactured.SOLUTION: In a bound stopper 10 made of polyurethane foam, the polyurethane foam is obtained from a composition for polyurethane foam containing at least an isocyanate component and foaming agent. The isocyanate component comprises urethane prepolymer with an isocyanate group obtained by mixing a polyol component and polyrotaxane, having a constituent containing an annular molecule with an active hydrogen group, in a molten state, and then compounding the mixture with isocyanate.SELECTED DRAWING: Figure 1

    【課題】機械的強度が大きく、且つ大荷重を繰り返し受けた時の疲労破壊やへたり等に対する耐久性に優れ、更に製造の容易なバウンドストッパの提供を目的とする。【解決手段】ポリウレタン発泡体製のバウンドストッパ10において、ポリウレタン発泡体を、少なくともイソシアネート成分と発泡剤とを含むポリウレタン発泡体用組成物から得られたものとし、イソシアネート成分が、ポリオール成分と、活性水素基を有する環状分子を構成体に含むポリロタキサンと、を溶融状態で混合した後にイソシアネートを配合することにより得られたイソシアネート基を有するウレタンプレポリマーからなる。【選択図】図1


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    Title :

    BOUND STOPPER AND MANUFACTURING METHOD THEREOF


    Additional title:

    バウンドストッパおよびその製造方法


    Contributors:

    Publication date :

    2019-05-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F16F SPRINGS , Federn / B60G VEHICLE SUSPENSION ARRANGEMENTS , Radaufhängungen und Federungen für Fahrzeuge / C08G MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS , Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind



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