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    • 6. 发明授权
    • Continuous process for the preparation of highly stable, finely divided,
low viscosity polymer polyols of small average particle size
    • 用于制备平均粒度小的高度稳定,细分,低粘度的聚合物多元醇的连续方法
    • US5814699A
    • 1998-09-29
    • US723659
    • 1996-10-03
    • Mark R. KratzManfred DietrichTorsten HeinemannGundolf JacobsJosef SandersHelmut Woynar
    • Mark R. KratzManfred DietrichTorsten HeinemannGundolf JacobsJosef SandersHelmut Woynar
    • C08F212/10C08F220/42C08F220/44C08F283/06C08F285/00C08F290/02C08G18/63C08F283/02
    • C08G18/635C08F290/02C08G2101/0008C08G2101/0016
    • A continuous process for the preparation of highly stable, finely divided, low viscosity polymer polyols of small average particle size wherein in the first step an intermediate is prepared by reacting (1) a mixture of at least two ethylenically unsaturated monomers, preferably styrene and acrylonitrile, in a mixture comprising (2) a base polyol and (3) a macromer in the presence of (4) a free radical initiator, (5) a solvent having moderate chain transfer activity, and, optionally, (6) a reaction moderator at a temperature of at least 100.degree. C., such that the intermediate contains at least about 12% by weight of macromer, based on the weight of the base polyol and macromer, and a solids content of at least about 15% by weight and less than about 30% by weight, based on the weight of the base polyol, macromer and ethylenically unsaturated monomers. The intermediate, which functions as a seed for further polymerization, is then further reacted, in one or more stirred-tank reactors in series, in a mixture of at least two ethylenically unsaturated monomers, preferably styrene and acrylonitrile, in a base polyol and, optionally, a macromer, in the presence of solvent, initiator and a reaction moderator which are distributed among the remaining reactors.
    • 一种用于制备平均粒度小的高度稳定,细分,低粘度的聚合物多元醇的连续方法,其中在第一步中,通过使(1)至少两种烯属不饱和单体,优选苯乙烯和丙烯腈的混合物 在(4)自由基引发剂,(5)具有中等链转移活性的溶剂的存在下,(2)基础多元醇和(3)大分子单体的混合物中,和(6)反应调节剂 在至少100℃的温度下,使得中间体含有至少约12重量%的大分子单体,基于基础多元醇和大分子单体的重量,固体含量至少约15重量%,和 小于约30重量%,基于基础多元醇,大分子单体和烯属不饱和单体的重量。 作为进一步聚合的种子的中间体在一个或多个串联的搅拌釜反应器中在基础多元醇中进一步在至少两种烯属不饱和单体,优选苯乙烯和丙烯腈的混合物中反应, 任选地,大分子单体在溶剂,引发剂和反应缓和剂的存在下分布在剩余的反应器中。
    • 10. 发明授权
    • Method for preparing polyether polyols
    • 制备聚醚多元醇的方法
    • US06350920B1
    • 2002-02-26
    • US09485507
    • 2000-03-20
    • Hans-Josef BuyschManfred DietrichPramod GuptaPieter Ooms
    • Hans-Josef BuyschManfred DietrichPramod GuptaPieter Ooms
    • C07C4311
    • B01J31/0202B01J31/068C08G65/2648C08G65/2651C08G65/30
    • Polyether polyols can be prepared by reacting polyols with epoxides in the presence of basic catalysts, by treating the polyether polyols containing the basic catalysts with OH-functional solid compounds of metals of groups III to VIII of the periodic system of the elements (Mendeleyev), the compounds being insoluble in the polyether polyols and having BET surface areas of from 10 to 1000 m2/g, isolating the solid inorganic compounds laden with the basic catalysts from the polyether polyol and using them in the reaction of polyols with epoxides, or bringing the isolated inorganic compounds laden with the basic catalysts into contact with the polyols that are to be used in the reaction with epoxides, separating those polyols from the inorganic compounds and delivering them to the reaction with epoxides.
    • 聚醚多元醇可以通过在碱性催化剂的存在下使多元醇与环氧化物反应来制备,通过用含有元素(Mendeleyev)的周期体系的III-VIII族金属的OH-官能固体化合物处理含有碱性催化剂的聚醚多元醇, 所述化合物不溶于所述聚醚多元醇并具有10至1000m 2 / g的BET表面积,从所述聚醚多元醇中分离含有碱性催化剂的固体无机化合物,并将其用于多元醇与环氧化物的反应,或将 分离的无机化合物与碱性催化剂接触,与用于与环氧化物的反应中使用的多元醇接触,将这些多元醇与无机化合物分离并将其输送到与环氧化物反应。