ALTERUNGSBESTÄNDIGE POLYURETHANDICHTUNG
    12.
    发明公开
    ALTERUNGSBESTÄNDIGE POLYURETHANDICHTUNG 审中-公开
    ALTERUNGSBESTÄNDIGEPOLYURETHANDICHTUNG

    公开(公告)号:EP3186293A1

    公开(公告)日:2017-07-05

    申请号:EP15742307.0

    申请日:2015-07-29

    Applicant: BASF SE

    Abstract: The invention relates to a method for producing seals made of polyurethane, in which (a) aliphatic polyisocyanate, (b) compounds containing at least two isocyanate-reactive groups, (c) catalysts, (d) antioxidants and/or light stabilizers, and, if need be, (e) blowing agents, and (f) auxiliary agents and/or additives are mixed to form a reaction mixture, and the reaction mixture is allowed to complete the reaction to form polyurethane. The seal made of polyurethane has a Shore A hardness of less than 90 and an intensity of at least 850 g/L. The polymeric compounds having isocyanate-reactive groups of compounds contain b1) polyetherols having a functionality of 2 to 4 and a hydroxyl number of 20 to 100 mg KOH/g, b2) hydrophobic polyols having an OH number of less than 180 mg KOH/g and a functionality of greater than 2 to 3, and b3) chain extenders. The invention further relates to a polyurethane seal obtained according to such a method, and to the use of such a seal in contact with rubber.

    Abstract translation: (a)脂族多异氰酸酯,(b)含有至少两个异氰酸酯反应性基团的化合物,(c)催化剂,(d)抗氧化剂和/或光稳定剂,以及 (e)发泡剂,和(f)助剂和/或添加剂混合以形成反应混合物,并使反应混合物完成反应以形成聚氨酯。 由聚氨酯制成的密封件具有小于90的肖氏A硬度和至少850g / L的强度。 具有异氰酸酯反应性基团的化合物的聚合物包含b1)官能度为2至4且羟值为20至100mg KOH / g的聚醚醇,b2)具有小于180mg KOH / g的OH值的疏水性多元醇 和大于2至3的官能度,和b3)扩链剂。 本发明还涉及根据这种方法获得的聚氨酯密封件,并涉及这种与橡胶接触的密封件的用途。

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