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    • 69. 发明申请
    • PROCESS FOR PRODUCING A LOW DENSITY FREE-RISE POLYURETHANE FOAM
    • 生产低密度自由升华聚氨酯泡沫的方法
    • WO2014056080A2
    • 2014-04-17
    • PCT/CA2013/000855
    • 2013-10-10
    • PROPRIETECT L.P.
    • ZHANG, JingULMAN, Dorota
    • C08L75/08
    • C08G18/14C08G18/1825C08G18/1833C08G18/2063C08G18/4883C08G18/6677C08G18/7621C08G18/7664C08G18/7671C08G2101/0008C08G2101/005C08G2101/0083
    • There is described a process for producing a free-rise polyurethane foam having a density of less than or equal to about 0.75 pcf. the the process comprises the steps of: (a) contacting: (i) an isocyanate, (ii) a first polyol comprising a first polymer chain consisting essentially of propylene oxide units and alkylene oxide units selected from ethylene oxide, butylene oxide and mixtures thereof in a weight ratio of propylene oxide units to alkylene oxide units in the range of from about 90:10 to about 25:75, the polymer chain being terminally capped with the ethylene oxide units, the first polyol having a primary hydroxyl content of at least about 70% based on the total hydroxyl content of the first polyol, (iii) water (iv) a surfactant and (v) a catalyst to form a foamable reaction mixture; and (b) expanding the foamable reaction mixture to produce the free-rise polyurethane foam.
    • 描述了一种生产密度小于或等于约0.75PCF的自由泡沫聚氨酯泡沫的方法。 该方法包括以下步骤:(i)使异氰酸酯,(ii)包含基本上由环氧丙烷单元组成的第一聚合物链和选自环氧乙烷,环氧丁烷及其混合物的环氧烷单元的第一多元醇 环氧丙烷单元与环氧烷单元的重量比在约90:10至约25:75的范围内,聚合物链被环氧乙烷单元末端封端,第一多元醇的伯羟基含量至少为 约70%,基于第一多元醇的总羟基含量,(iii)水(iv)表面活性剂和(v)形成可发泡反应混合物的催化剂; 和(b)使可发泡反应混合物膨胀以产生自由起泡聚氨酯泡沫。