Method for purifying polyether polyols made with double metal cyanide
catalysts
    41.
    发明授权
    Method for purifying polyether polyols made with double metal cyanide catalysts 失效
    用双金属氰化物催化剂制备聚醚多元醇的方法

    公开(公告)号:US5416241A

    公开(公告)日:1995-05-16

    申请号:US187955

    申请日:1994-01-27

    申请人: Jude T. Ruszkay

    发明人: Jude T. Ruszkay

    CPC分类号: C08G65/2663 C08G65/30

    摘要: A method for purifying polyether polyols made with double metal cyanide (DMC) catalysts is disclosed. A poly(oxypropylene) polyol containing DMC catalyst residues is combined with an amount of an alkali metal compound sufficient to convert DMC residues to an insoluble species, but not sufficient to generate polyol alkoxide groups. The polyol is heated in the presence of water, and is then filtered and stripped. The method eliminates the need to use magnesium silicate in removing DMC catalysts from polyols.

    摘要翻译: 公开了一种用双金属氰化物(DMC)催化剂制备聚醚多元醇的方法。 将含有DMC催化剂残余物的聚(氧化丙烯)多元醇与一定量的足以将DMC残余物转化为不溶性物质但不足以产生多元醇醇盐基团的碱金属化合物组合。 多元醇在水存在下加热,然后过滤并汽提。 该方法消除了使用硅酸镁从多元醇中除去DMC催化剂的需要。

    Productive process for making conventional and low-unsaturation
polyether polyols
    42.
    发明授权
    Productive process for making conventional and low-unsaturation polyether polyols 失效
    制备常规和低不饱和度聚醚多元醇的生产方法

    公开(公告)号:US5364973A

    公开(公告)日:1994-11-15

    申请号:US58109

    申请日:1993-05-06

    申请人: Jose F. Pazos

    发明人: Jose F. Pazos

    CPC分类号: C08G65/30 C08G18/4866

    摘要: A productive process for making conventional and low-unsaturation polyether polyols is disclosed. The process involves continuous removal of allyl alcohol and lower allyl alcohol propoxylates from the polyol during manufacture. The process can be performed at high temperatures and/or low catalyst concentrations. Polyether polyols with exceptionally low monol contents can be prepared.

    摘要翻译: 公开了制备常规和低不饱和度聚醚多元醇的生产方法。 该方法包括在制备期间从多元醇中连续除去烯丙醇和降低烯丙醇丙氧基化物。 该方法可以在高温和/或低催化剂浓度下进行。 可以制备具有非常低的单醇含量的聚醚多元醇。

    Reducing molecular weight distribution of polyether glycols by
short-path distillation
    44.
    发明授权
    Reducing molecular weight distribution of polyether glycols by short-path distillation 失效
    通过短路蒸馏降低聚醚二醇的分子量分布

    公开(公告)号:US5302255A

    公开(公告)日:1994-04-12

    申请号:US944994

    申请日:1992-09-15

    摘要: Polyether glycols, especially poly(tetramethylene ether) glycol (PTMEG) having a narrow molecular weight distribution of about 1.25 to 1.80, or dispersity of 1.05 to 1.90, are made by a process involving distilling the low molecular weight fraction in unit operations including at least one short-path distillation evaporator. Two short-path distillation evaporators, in series, are desirable if significant narrowing of the PTMEG is required. In these units, PTMEG is subjected to temperatures in the range of 270.degree.-400.degree. C. with the hold-up time varying between 10-200 seconds. The required vacuum to force the separation of the low molecular weight PTMEG varies between 0.001 mm and 1.0 mbar. PTMEG residue from the distillation unit is also characterized by its low water content and low concentration of oligomeric cyclic ethers.

    摘要翻译: 具有约1.25至1.80的窄分子量分布或1.05至1.90的分子量的聚醚二醇,特别是聚(四亚甲基醚)二醇(PTMEG)是通过包括在单元操作中蒸馏低分子量级分的方法制备的,包括至少 一个短路蒸馏蒸发器。 如果需要PTMEG的显着变窄,则需要两个串联的短路蒸馏蒸发器。 在这些单元中,PTMEG的温度在270-400摄氏度的范围内,保持时间在10-200秒之间变化。 强制分离低分子量PTMEG所需的真空度在0.001毫米至1.0毫巴之间变化。 来自蒸馏单元的PTMEG残余物的特征还在于其低含水量和低浓度的低聚环醚。

    New functionalized perfluoropolyethers and process for the preparation
thereof
    49.
    发明授权
    New functionalized perfluoropolyethers and process for the preparation thereof 失效
    新的功能化全氟聚醚及其制备方法

    公开(公告)号:US4720527A

    公开(公告)日:1988-01-19

    申请号:US929831

    申请日:1986-11-13

    CPC分类号: C08G65/3236 C08G65/007

    摘要: A process for the scission of high molecular weight perfluoropolyethers having neutral end groups obtained from photo-oxidation processes of perfluoroolefins, or fluorination of hydrogenated polyalkylene oxides, or by polymerization with opening of the partially fluorinated oxetane ring, said scission being carried out in the presence of catalysts composed of fluorides, oxyfluorides, or oxides of transition metals, or of Al, Sn, Sb, at temperatures ranging from 150.degree. to 380.degree. C.; said scission process leads to the formation of low molecular weight perfluoropolyethers having neutral and acid end groups, the perfluoropolyethereal acids being subjectable to conversion reactions in order to obtain functionalized perfluoropolyethers and to be utilized to provide new polymers.

    摘要翻译: 具有中和端基的高分子量全氟聚醚的切断方法,其由全氟烯烃的光氧化方法获得,或者氢化聚环氧烷的氟化,或通过部分氟化的氧杂环丁烷环的开放进行聚合,所述断裂在存在下进行 由氟化物,氟氧化物或过渡金属的氧化物或Al,Sn,Sb在150℃至380℃的温度下组成的催化剂。 所述断裂过程导致形成具有中性和酸端基的低分子量全氟聚醚,全氟多苯基酸可以转化为反应以获得官能化的全氟聚醚并用于提供新的聚合物。

    High strength and high tensile modulus fibers or poly(ethylene oxide)
    50.
    发明授权
    High strength and high tensile modulus fibers or poly(ethylene oxide) 失效
    高强度和高拉伸模量纤维或聚(环氧乙烷)

    公开(公告)号:US4619988A

    公开(公告)日:1986-10-28

    申请号:US749073

    申请日:1985-06-26

    CPC分类号: C08J5/046 D01D5/40 D01F6/66

    摘要: Strong fibers of poly(ethylene oxide) result from crystallization of the polymer of molecular weight of at least about 500,000 in a shear flow field. Using solutions of a polymer with a molecular weight greater than about 1,000,000, fibers with a tensile strength and tensile modulus of at least 0.1 and 0.5 GPa, respectively, can be readily obtained. Crystallization from a xylene solution within the range from about 35.degree. to about 45.degree. C. is particularly effective.

    摘要翻译: 聚(环氧乙烷)的强纤维是由剪切流场中分子量至少约为500,000的聚合物结晶而产生的。 使用分子量大于约1,000,000的聚合物溶液,可以容易地获得拉伸强度和拉伸模量分别为至少0.1和0.5GPa的纤维。 从约35℃至约45℃范围内的二甲苯溶液结晶是特别有效的。