本申请涉及特种工业轮胎领域,具体公开了一种高硬度聚氨酯轮胎及其制备方法;一种高硬度聚氨酯轮胎由包含固化剂和异氰酸酯预聚物组成,NH2:NCO化学计量比为0.9‑1.25:1;固化剂为小分子二胺与氯化钠的络合物在己二酸二辛酯中的分散液,异氰酸酯预聚物为二异氰酸酯和聚醚多元醇组成;其制备方法为:将二异氰酸酯与聚醚多元醇进行预聚反应,得异氰酸酯预聚物;小分子二胺、氯化钠络合后分散在己二酸二辛酯中,得固化剂;将固化剂、异氰酸酯预聚物混合得胶凝混合物;胶凝混合物经浇注、胶凝、脱模、二次硫化,制得成品;使聚氨酯轮胎具有较高的硬度,即使在低温条件下承载重物时自身形变量仍较小。

    The invention relates to the field of special industrial tires, and particularly discloses a high-hardness polyurethane tire and a preparation method thereof. The high-hardness polyurethane tire is composed of a curing agent and an isocyanate prepolymer, wherein the stoichiometric ratio of NH2 to NCO is (0.9-1.25): 1; the curing agent is a dispersion liquid of a complex of micromolecular diamine and sodium chloride in dioctyl adipate, and the isocyanate prepolymer is composed of diisocyanate and polyether polyol; the preparation method comprises the following steps: carrying out prepolymerization reaction on diisocyanate and polyether polyol to obtain an isocyanate prepolymer; complexing small molecule diamine and sodium chloride, and dispersing in dioctyl adipate to obtain a curing agent; mixing a curing agent and the isocyanate prepolymer to obtain a gelling mixture; and carrying out pouring, gelling, demolding and secondary vulcanization on the gelling mixture to obtain a finished product. The polyurethane tire has high hardness, and the self deformation quantity is still small even when the polyurethane tire bears a heavy object under the low-temperature condition.


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    Titel :

    一种高硬度聚氨酯轮胎及其制备方法


    Erscheinungsdatum :

    2023-03-17


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    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 / B60C VEHICLE TYRES , Fahrzeugreifen / C08J Verarbeitung , WORKING-UP / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS