Process for making polyurethane foam
    3.
    发明授权
    Process for making polyurethane foam 失效
    制造聚氨酯泡沫的方法

    公开(公告)号:US4714574A

    公开(公告)日:1987-12-22

    申请号:US468058

    申请日:1983-02-09

    摘要: A flexible polyurethane foam article with regions of different hardness is made by introducing into a mould a foam formulation giving a foam of a given hardness and then introducing a foam formulation giving a foam of different hardness directly onto the first foam formulation at a time corresponding to a volume expansion in the range 100% to 2300%.

    摘要翻译: PCT No.PCT / GB82 / 00185 Sec。 371日期1983年2月9日 102(e)1983年2月9日PCT PCT。1982年6月24日PCT公布。 公开号WO83 / 00117 日期:1983年1月20日。具有不同硬度区域的柔性聚氨酯泡沫制品通过向模具中引入具有给定硬度的泡沫的泡沫配方,然后将具有不同硬度的泡沫的泡沫制剂直接引入第一 泡沫制剂在相当于100%至2300%范围内的体积膨胀的时间。

    Equipment for mixing liquid reactants
    4.
    发明授权
    Equipment for mixing liquid reactants 失效
    混合液体反应物的设备

    公开(公告)号:US4595565A

    公开(公告)日:1986-06-17

    申请号:US645482

    申请日:1984-08-29

    摘要: A mixing head suitable for mixing two or more liquids is provided. During the mixing process, the liquids are first contacted in a zone of small dimensions in which turbulent mixing occurs and are then discharged into a zone of larger dimensions in which laminar flow is established. The two zones are so designed that there is a single piston operating in both zones and discharging the mixed product. The mixing head can be used to mix a polyol and a polyisocyanate during the formation of polyurethanes.

    摘要翻译: 提供一种适于混合两种或多种液体的混合头。 在混合过程中,液体首先在其中发生湍流混合的小尺寸区域中接触,然后排出到其中形成层流的较大尺寸的区域中。 两个区域的设计使得在两个区域中都有一个单一活塞,并排出混合产品。 混合头可用于在形成聚氨酯期间混合多元醇和多异氰酸酯。