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    • 1. 发明公开
    • LOW DENSITY FULL WATER BLOWN POLYURETHANE RIGID FOAM
    • UNTER VERWENDUNG VON WASSER GEBLASENER POLYURETHANHARTSCHAUM VON NIEDRIGER DICHTE
    • EP2825577A1
    • 2015-01-21
    • EP13708842.3
    • 2013-03-13
    • Dow Global Technologies LLC
    • GIROTTI, Cecilia
    • C08G18/09C08G18/48C08G18/18C08G18/20
    • C08G18/14C08G18/092C08G18/18C08G18/1816C08G18/1825C08G18/1841C08G18/2027C08G18/302C08G18/4812C08G18/4816C08G2101/00C08G2101/0025C08G2101/0083C08J9/08
    • A formulation for preparing a low density, full water blown polyurethane rigid foam includes an isocyanate component; an isocyanate-reactive component comprising from 30-50 wt% of a first polyether polyol having a functionality greater than 5 and an OH value from 350-550 mg
      KOH /g; from 5 to 25 wt% of a diol having an OH value from 100-300 mg
      KOH /g; and from 15 to 35 weight percent of a second polyether polyol having a functionality from 3 to 5; further including from 1.5 to 5 wt% of a catalyst selected from dimethylbenzylamine and/or 1,2-dimethyl-imidazole; from greater than 0 to 1 wt% of a trimerization catalyst selected from a glycine salt and/or tris(dimethyl aminomethyl) phenol; greater than 4.1 wt% water as a blowing agent; and any additional constituents selected such that the formulation, excluding the isocyanate component, totals 100 wt% and, the formulation absent the isocyanate component, has a dynamic viscosity from 540 to 864 mPa*s at 20 °C. Processing under one-shot conditions can yield a rigid form having a molecular weight per crosslink ratio from 380 to 420. The formulation offers good processability, while the foam shows desirable dimensional stability and mechanical properties at unexpectedly low applied density.
    • 用于制备低密度全水泡聚氨酯硬质泡沫的制剂包括异氰酸酯组分; 异氰酸酯反应性组分,其包含30-50重量%的官能度大于5且OH值为350-550mgKOH / g的第一聚醚多元醇; 5至25重量%的OH值为100-300mgKOH / g的二醇; 和15至35重量%的官能度为3至5的第二聚醚多元醇; 还包括1.5至5重量%的选自二甲基苄基胺和/或1,2-二甲基咪唑的催化剂; 大于0至1重量%的选自甘氨酸盐和/或三(二甲基氨基甲基)苯酚的三聚催化剂; 大于4.1重量%的水作为发泡剂; 并且选择任何另外的组分使得除了异氰酸酯组分之外的制剂总计100重量%,并且没有异氰酸酯组分的制剂在20℃下具有540至864mPa * s的动态粘度。在一次性条件下加工 可产生具有380至420的每交联比的分子量的刚性形式。该制剂提供了良好的加工性能,而泡沫在意想不到的低施加密度下显示出期望的尺寸稳定性和机械性能。