Process for production of polyol blends

本发明涉及就地生产聚醚一元醇和聚醚多元醇的共混物的方法。该方法包括：在反应容器中引入一元醇(Si)和双金属氰化物(DMC)催化剂，将环氧化物混合物进料到该容器，和使该环氧化物与初始起始原料反应，和通过进料环氧化物连续地聚合，直到该一元醇的当量重量达到希望的水平，然后连续地将多官能起始原料(S#-[c])加入该反应容器，同时连续地进料环氧化物混合物，完成对起始原料的加成，和使所述混合物连续地聚合，直到得到的聚醚一元醇和聚醚多元醇的共混物具有大约350到大约750的当量重量和大约2到大约4的平均官能度。就地聚合的聚醚一元醇和聚醚多元醇的共混物也是本发明的一部分。本发明还涉及生产粘弹性泡沫的方法。该方法包括使多异氰酸酯组分与异氰酸酯-反应性组分在添加剂存在下反应，其中所述异氰酸酯-反应性组分包含至少50重量％的如上所述的就地聚合的聚醚一元醇和聚醚多元醇的共混物。 This invention relates to a process for the in-situ production of a blend of a polyether monol and a polyether polyol. This process comprises introducing a monol (Si) and a double metal cyanide (DMC) catalyst into a reaction vessel, feeding an epoxide mixture into the vessel and allowing the epoxide to react with the initial starter and continuing to polymerize by feeding epoxide until the equivalent weight of the monol reaches the desired level, then continuously adding a polyfunctional starter (Sc) to the reaction vessel while continuing to feed an epoxide mixture, completing addition of the starter, and allowing the mixture to continue to polymerize until the resultant blend of polyether monol and polyether polyol has an average equivalent weight of from about 350 to about 750, and an average functionality of from about 2 to about 4. In-situ polymerized blends of a polyether monol and a polyether polyol are also part of the present invention. The present invention also relates to a process for the production of viscoelastic foams. This process comprises reacting a polyisocyanate component with an isocyanate-reactive component, in the presence of additives, wherein the isocyanate-reactive component comprises at least 50% by weight of the in-situ polymerized blend of a polyether monol and a polyether polyol as described above.