Soft polyurethane elastomer containing isocyanurate ring
    6.
    发明授权
    Soft polyurethane elastomer containing isocyanurate ring 失效
    含有异氰脲酸酯环的软质聚氨酯弹性体

    公开(公告)号:US4124573A

    公开(公告)日:1978-11-07

    申请号:US763900

    申请日:1977-01-31

    IPC分类号: C08G18/09 C08G18/18 C08G18/48

    摘要: A soft polyurethane elastomer containing isocyanurate ring prepared by reacting polyoxypropylene polyol having an OH equivalent molecular weight of about 500-3,000, and a functionality of about 2-5, and polyisocyanate compound in the presence of tertiary amine catalyst, and if desired further combined with organic tin catalyst. This process is advantageous in facilitation of material control during curing reaction, low exothermicity and high thermal stability of the resulting polymer. Further the properties of the polymer are improved by using ethyleneoxide addition polyoxypropylene polyol instead of the above polymer and a specific tertiary amine as a catalyst. The elastomer thus prepared is significantly suitable for tire filling material.

    摘要翻译: 一种含有异氰脲酸酯环的软质聚氨酯弹性体环,其通过在叔胺催化剂存在下使具有约500-3,000的OH当量分子量和约2-5官能度的聚氧丙烯多元醇和多异氰酸酯化合物反应制备,如果需要, 有机锡催化剂。 该方法有利于促进固化反应期间的材料控制,所得聚合物的低放热性和高热稳定性。 此外,通过使用环氧乙烷加成聚氧丙烯多元醇代替上述聚合物和特定的叔胺作为催化剂,改进了聚合物的性能。 如此制备的弹性体显着适用于轮胎填充材料。

    Polyurethane composition having improved tear strength and process for
preparation thereof
    7.
    发明授权
    Polyurethane composition having improved tear strength and process for preparation thereof 失效
    具有改善的撕裂强度的聚氨酯组合物及其制备方法

    公开(公告)号:US4062825A

    公开(公告)日:1977-12-13

    申请号:US625248

    申请日:1975-10-23

    IPC分类号: C08G18/00 C08K3/36 C08L75/00

    CPC分类号: C08K3/36

    摘要: A polyurethane composition having high tear strength has been produced by mixing homogeneously 20 to 50 parts by weight of finely divided acidic silica particles, 100 parts by weight of isocyanate-terminated prepolymer and appropriate parts of curative, and curing the mixture in a manner well known in the prior art, where the ratio (l/d) of average chain distance (l) between adjacent crosslinking points of the cured polyurethane chains to average size (d) of finely divided silica particles is in the range of from 2.5 to 20.

    摘要翻译: 通过均匀混合20〜50重量份的细分的酸性二氧化硅颗粒,100重量份异氰酸酯封端的预聚物和适当的固化剂部分,制备具有高撕裂强度的聚氨酯组合物,并以公知的方式固化该混合物 在现有技术中,其中固化的聚氨酯链的相邻交联点与细碎二氧化硅颗粒的平均尺寸(d)之间的平均链距(l)的比率(l / d)在2.5至20的范围内。