Method for making rigid polyisocyanurate foam
    1.
    发明授权
    Method for making rigid polyisocyanurate foam 失效
    刚性聚异氰脲酸酯泡沫的制备方法

    公开(公告)号:US5095042A

    公开(公告)日:1992-03-10

    申请号:US749170

    申请日:1991-08-23

    IPC分类号: B29C44/28 C08G18/09 C08G18/22

    摘要: A rigid polyisocyanurate foam suitable for holding stems of artificial flowers is a substantially closed cell foam having a density of about 1.7 to 2.9 lb./cu. ft. The foam is made by mixing components A and B in a ratio of B:A of about 0.2 to 0.6. Component B is a mixture of 100 parts by weight of polyester or polyether polyol, 0.5 to 5 parts by weight of potassium octoate, 4 to 10 parts by weight of water and 0 to 8 parts by weight of green colorant. Component B is mixed with 250 to 500 parts by weight of polymeric diphenyl methane diisocyanate (component A), and the resulting mixture is poured onto a substrate, which may be a conveyor or a mold box, for foaming in a substantially free rise step with a cream time of about 5 to 20 seconds. The conveyor is preferably heated to about 100.degree. to 150.degree. F. The foam is cured before cutting.

    摘要翻译: 适合于保持人造花茎的刚性聚异氰脲酸酯泡沫是密度为约1.7至2.9lb./cu的基本上密闭的泡沫泡沫。 泡沫体通过将组分A和B以约0.2至0.6的B:A的比例混合来制备。 组分B是100重量份聚酯或聚醚多元醇,0.5-5重量份辛酸钾,4-10重量份水和0-8重量份绿色着色剂的混合物。 将组分B与250-500重量份的聚合二苯基甲烷二异氰酸酯(组分A)混合,并将所得混合物倒入可以是输送机或模具箱的基材上,以在基本上自由的上升步骤中发泡, 约5至20秒的奶油时间。 输送机优选加热至约100°F至150°F。切割前泡沫固化。