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    Production of rigid polyurethane foams
    3.
    发明授权
    Production of rigid polyurethane foams 失效
    生产刚性聚氨酯泡沫

    公开(公告)号：US5552450A

    公开(公告)日：1996-09-03

    申请号：US229255

    申请日：1994-04-18

    申请人： Werner Hinz ,  Rolf Henn ,  Uwe Keppeler ,  Bernd Guettes

    发明人： Werner Hinz ,  Rolf Henn ,  Uwe Keppeler ,  Bernd Guettes

    IPC分类号： C08G18/48 ,  C08G18/66 ,  C08G65/26 ,  C08G65/28 ,  C08G65/333 ,  C08G18/00

    CPC分类号： C08G18/4845 ,  C08G18/4812 ,  C08G18/6666 ,  C08G65/26 ,  C08G65/33348 ,  C08G2101/0025 ,  C08G2101/0041

    摘要： A process for the production of rigid polyurethane foams involves reactinga) organic and/or modified organic polyisocyanates withb) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms, and, if desired,c) low-molecular-weight chain extenders and/or cross-linking agents,in the presence ofd) blowing agents,e) catalysts and, if desired,f) assistants and/or additives,where the relatively high-molecular-weight compounds (b) containing at least two reactive hydrogen atoms are polyoxypropylene-polyols and/or polyoxyethylene-polyoxy-propylene-polyols containing up to 20% by weight, based on the weight of the alkylene oxide units, of pendant oxyethylene units containing secondary hydroxyl groups and having a functionality of from 3.8 to 4.1, a hydroxyl number of from 385 to 410 mg of KOH/g and a viscosity of from 1700 to 2400 mPa.multidot.s at 25.degree. C., and which can be prepared by anionic polymerization of 1,2-propylene oxide and, if desired, ethylene oxide on an initiator molecule mixture comprising sucrose, pentaerythritol and diethylene glycol.

    摘要翻译： 用于生产刚性聚氨酯泡沫的方法包括使a）有机和/或改性的有机多异氰酸酯与b）至少一种含有至少两个反应性氢原子的相对高分子量化合物反应，如果需要，c） 分子量增链剂和/或交联剂，在d）发泡剂的存在下，e）催化剂，如果需要，f）助剂和/或添加剂，其中相对高分子量的化合物（b） 含有至少两个反应性氢原子的是聚氧丙烯 - 多元醇和/或聚氧乙烯 - 聚氧丙烯 - 多元醇，其含有基于烯化氧单元重量的至多20重量％的含有仲羟基的侧面氧乙烯单元并具有 官能度为3.8至4.1，羟基数为385至410mg KOH / g，25℃时粘度为1700至2400 mPax，可通过1,2-环氧丙烷的阴离子聚合制备 如果需要， 包含蔗糖，季戊四醇和二甘醇的引发剂分子混合物上的氧化亚苯基。

    Process for the production of molded polyurethane bodies
    5.
    发明授权
    Process for the production of molded polyurethane bodies 失效
    生产模塑聚氨酯体的工艺

    公开(公告)号：US5028684A

    公开(公告)日：1991-07-02

    申请号：US81958

    申请日：1987-08-05

    申请人： Alfred Neuhaus ,  Otto Ganster ,  Bruno Luckas

    发明人： Alfred Neuhaus ,  Otto Ganster ,  Bruno Luckas

    IPC分类号： C08G18/40 ,  C08G18/48 ,  C08G18/65 ,  C08G18/66 ,  C08G18/76

    CPC分类号： C08G18/4804 ,  C08G18/4072 ,  C08G18/4833 ,  C08G18/6666 ,  C08G18/7664 ,  C08G2120/00

    摘要： The present invention is directed to a process for the preparation of molded polyurethane articles having densities of about 0.8 to 1.4 g/cm.sup.3 and a flex moduli according to DIN 53,457 of at least about 1800 N/mm.sup.2 by reacting according to the technique of reaction injection molding(a) di- and/or polyisocyanates of the diphenylmethane series with(b) polyether polyols in the molecular weight range of 500 to 999,(c) organic polyhydroxyl compounds in the molecular weight range of 62 to 499 and optionally(d) polyethers in the molecular weight range of 1000 to about 10,000 containing at least two isocyanate reactive groups and/or(e) aromatic diamines with a molecular weight of less than 500 in the presence of(f) catalysts which accelerate the isocyanate addition reactionwherein(i) the polyether polyols used as component (b) have at least about 30% by weight of ethylene oxide units incorporated in polyether chains,(ii) component (d) is used in a quantity of 0 to about 40% by weight, based on the weight of components (b) to (e), and(iii) the nature and quantitative proportions of components (b) to (e) are chosen so that the average hydroxyl number of the mixture of these components is greater than about 300.

    摘要翻译： 本发明涉及根据反应注射技术制备具有约0.8至1.4g / cm 3的密度和至少约1800N / mm 2的根据DIN 53,457的挠曲模量的模制聚氨酯制品的方法 （a）二苯基甲烷系列的二 - 和/或多异氰酸酯与（b）分子量范围为500至999的聚醚多元醇，（c）分子量范围为62至499的有机多羟基化合物和任选的（d） 在（f）加速异氰酸酯加成反应的催化剂的存在下，分子量范围为1000至约10,000的聚醚包含至少两个异氰酸酯反应性基团和/或（e）分子量小于500的芳族二胺，其中（ i）用作组分（b）的聚醚多元醇具有至少约30重量％的掺入聚醚链中的环氧乙烷单元，（ii）组分（d）的用量为0至约40重量％，b 根据组分（b）至（e）的重量，和（iii）选择组分（b）至（e）的性质和定量比例，使得这些组分的混合物的平均羟值大于约 300。

    Process for the preparation of semi-rigid polyurethane foam having exceptional shock-absorbing properties and vehicle bumpers thereof
    10.
    发明授权
    Process for the preparation of semi-rigid polyurethane foam having exceptional shock-absorbing properties and vehicle bumpers thereof 失效
    用于制备具有特殊减震性能的半硬质聚氨酯泡沫的方法及其车辆保险杠

    公开(公告)号：US4134610A

    公开(公告)日：1979-01-16

    申请号：US754469

    申请日：1976-12-27

    申请人： Frank W. Lindewall

    发明人： Frank W. Lindewall

    IPC分类号： C08G18/38 ,  C08G18/66 ,  B60R19/08 ,  B29D27/04 ,  C08G18/14

    CPC分类号： C08G18/6666 ,  C08G18/3829 ,  C08G18/3857 ,  C08G2101/0016 ,  C08G2101/0083 ,  Y10T428/249993

    摘要： A process is provided for producing semi-rigid polyurethane foams having exceptional shock-absorbing properties, even after repeated compression, prepared by the reaction of a polyisocyanate; a polyether polyol having a molecular weight within the range from about 2,000 to about 10,000; from about 1 to about 5% by weight of water per part by weight of polyether polyol; from about 1 to about 6% by weight of urea and/or thiourea per part by weight of polyether polyol; and a cross-linking compound having at least three active hydrogen atoms per molecule that are reactive with isocyanate groups and having a molecular weight below about 1000 in an amount from about 5 to about 25% by weight per part by weight of polyether polyol; the amount of polyisocyanate being selected to give an isocyanate index within the range from about 0.7 to about 1.4.The process provides polyurethane foams that have a cellular structure that remains undamaged under compression as high as 60% at temperatures within the range from about +60.degree. C to about -40.degree. C, and the consequent deformation is less than 1% even after ten compressions of at lest 50% in rapid succession.Accordingly, the invention further provides vehicle bumpers having an impact-receiving layer of this polyurethane foam, and that meet the requirements of FMVSS 215.

    摘要翻译： 提供了一种制备半刚性聚氨酯泡沫体的方法，其具有特别的减震性能，即使经过反复压缩，通过多异氰酸酯的反应制备; 分子量在约2,000至约10,000范围内的聚醚多元醇; 约1至约5重量％的水/重量份的聚醚多元醇; 约1至约6重量％的脲和/或硫脲每重量份的聚醚多元醇; 和每分子具有至少三个活性氢原子的交联化合物，其与异氰酸酯基反应并且分子量低于约1000，其量为每重量份聚醚多元醇约5至约25重量％; 选择的多异氰酸酯的量使得异氰酸酯指数在约0.7至约1.4的范围内。