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27 条记录 (耗时 0.023 秒)

    Process for the preparation of aliphatic carbonates having a six-membered ring
    2.
    发明授权
    Process for the preparation of aliphatic carbonates having a six-membered ring 失效
    制备具有六元环的脂族碳酸酯的方法

    公开(公告)号：US5861107A

    公开(公告)日：1999-01-19

    申请号：US877386

    申请日：1997-06-17

    申请人： Hans-Josef Buysch ,  Gerd Fengler ,  Karl-Heinz Neumann ,  Paul Wagner ,  Martin Melchiors ,  Wieland Hovestadt

    发明人： Hans-Josef Buysch ,  Gerd Fengler ,  Karl-Heinz Neumann ,  Paul Wagner ,  Martin Melchiors ,  Wieland Hovestadt

    IPC分类号： C07D319/06 ,  C09K3/00 ,  C07D321/00

    CPC分类号： C07D319/06

    摘要： The invention relates to a process for the preparation of carbonates having a six-membered ring, of the formula ##STR1## by transesterification of 1,3-propanediol compounds with carbonic acid esters and subsequent distillative depolymerization of the oligo- or polycarbonate initially formed, one or more catalysts from the group consisting of compounds of Sn, Ti or Zr being employed both for the transesterification and for the depolymerization and, if appropriate, the distillation residue is at least partly recycled into the transesterification. Such carbonates having a six-membered ring can furthermore be stabilized against undesirable polymerization by addition of small amounts of acids of sulfur or phosphorus or esters or salts thereof.

    摘要翻译： 本发明涉及一种通过1,3-丙二醇化合物与碳酸酯的酯交换反应制备具有下式（VI）的六元环的碳酸酯的方法，随后将低聚物或聚碳酸酯进行蒸馏解聚 最初形成的一种或多种由Sn，Ti或Zr化合物组成的组的催化剂用于酯交换和解聚，如果合适的话，蒸馏残余物至少部分地被再循环到酯交换中。 具有六元环的这种碳酸酯还可以通过加入少量的硫或磷酸或其酯或其盐来稳定而防止不期望的聚合。

    Isocyanate prepolymers, a process for their production and their use in one-component coating compositions
    7.
    发明授权
    Isocyanate prepolymers, a process for their production and their use in one-component coating compositions 失效
    异氰酸酯预聚物，其制备方法及其在单组分涂料组合物中的应用

    公开(公告)号：US5508372A

    公开(公告)日：1996-04-16

    申请号：US49750

    申请日：1993-04-19

    申请人： Martin Brahm ,  Lutz Schmalstieg ,  Werner Kubitza ,  Wieland Hovestadt ,  Josef Pedain

    发明人： Martin Brahm ,  Lutz Schmalstieg ,  Werner Kubitza ,  Wieland Hovestadt ,  Josef Pedain

    IPC分类号： C08G18/08 ,  C08G18/10 ,  C08G18/62 ,  C08G18/73 ,  C08G18/75 ,  C08G18/79 ,  C08G18/80 ,  C09D175/00 ,  C09D175/04 ,  C09D133/08 ,  C08G18/72 ,  C09D175/06

    CPC分类号： C08G18/8016 ,  C08G18/089 ,  C08G18/10 ,  C08G18/6229 ,  C08G18/6254 ,  C08G18/73 ,  C08G18/792 ,  C08G18/798

    摘要： The present invention relates to a process for the production of storage stable prepolymers containing free isocyanate groups by reactinga) an organic polyisocyanate component having (cyclo)aliphatically bound isocyanate groups and a maximum functionality of 4.5 withb) one or more hydroxy-functional polyacrylate resins having a content of alcoholic hydroxy groups of 0.05 to 7% by weight at an equivalent ratio of isocyanate groups of component a) to hydroxyl groups of component b) of 3:1 to 40:1, wherein components a) and b) are selected to provide a value B of at most 4 when calculated in accordance with the formula: ##EQU1## wherein F.sub.1 and F.sub.2 represent the NCO and OH functionalities of components a) and b), F.sub.1 representing the component with the lower functionality when the components differ in functionality andval.sub.A /val.sub.I represents the OH/NCO equivalent ratio of components a) and b). The invention also relates to the NCO prepolymers obtained by this process and to their use for the production of one-component, moisture-curing coating compositions.

    摘要翻译： 本发明涉及通过使具有（环）脂族结合的异氰酸酯基团和最大官能度为4.5的有机多异氰酸酯组分与b）一种或多种羟基官能聚丙烯酸酯反应生产含有游离异氰酸酯基团的储存稳定的预聚物的方法 醇成分含量为0.05〜7重量％，成分a）的异氰酸酯基与成分b）的羟基的比例为3：1〜40：1的树脂，其中a）和b）成分为 其选择为当根据以下公式计算时提供至多为4的值B：其中F1和F2表示组分a）和b）的NCO和OH官能度，F1表示当组分具有较低官能度的组分时 功能不同，ValA / ValI代表组分a）和b）的OH / NCO当量比。 本发明还涉及通过该方法获得的NCO预聚物及其用于生产单组分湿固化涂料组合物的用途。

    High solids polyurethane-urea dispersions having improved storage stability
    9.
    发明授权
    High solids polyurethane-urea dispersions having improved storage stability 有权
    具有改进的储存稳定性的高固体聚氨酯 - 脲分散体

    公开(公告)号：US06084051A

    公开(公告)日：2000-07-04

    申请号：US318356

    申请日：1999-05-25

    申请人： Harald Blum ,  Wieland Hovestadt ,  Lothar Kahl ,  Douglas A. Wicks

    发明人： Harald Blum ,  Wieland Hovestadt ,  Lothar Kahl ,  Douglas A. Wicks

    IPC分类号： C08J3/07 ,  C08G18/00 ,  C08G18/08 ,  C08G18/10 ,  C08G18/32 ,  C08G18/75 ,  C09D175/04 ,  C09D175/06 ,  C08G18/12

    CPC分类号： C08G18/0866 ,  C08G18/0823 ,  C09D175/06

    摘要： The present invention relates to aqueous polyurethane-urea dispersions having a resin solids content of at least 35 wt. % and a pH of at least 7.5 which are prepared bya) forming an isocyanate-terminated prepolymer by reacting a difunctional polyol having a molecular weight of 500 to 6000, a low molecular weight alcohol, a diisocyanate and/or triisocyanate and an isocyanate-reactive compound which has an acid group,b) neutralizing 65% to 95% of the acid groups prior to dispersing the prepolymer in water,c) dispersing the neutralized prepolymer in water,d) chain extending the isocyanate groups with water to form a polyurethane-urea, ande) after completion of the chain extending reaction adding additional neutralizing agent to provide a total amount of neutralizing agent that is sufficient to neutralize at least 115% of the acid groups of component D),wherein the polyurethane-urea contains 1.0 to 4.0%, based on resin solids, of the isolated urea groups. The present invention also relates to a process for the preparation of these polyurethane-urea dispersions and to their use in coating compositions.

    摘要翻译： 本发明涉及树脂固体含量至少为35重量％的水性聚氨酯 - 脲分散体。 ％，pH至少为7.5，其通过以下步骤制备：a）通过使分子量为500至6000的双官能多元醇，低分子量醇，二异氰酸酯和/或三异氰酸酯与异氰酸酯 - 具有酸基的反应性化合物，b）在将预聚物分散在水中之前中和65％至95％的酸基，c）将中和的预聚物分散在水中，d）用水延伸异氰酸酯基团以形成聚氨酯 - 脲，和e）在扩链反应完成后，加入另外的中和剂以提供足以中和组分D）的至少115％酸基团的中和剂的总量，其中聚氨酯 - 尿素含有1.0 至4.0％，基于树脂固体，分离的脲基团。 本发明还涉及制备这些聚氨酯 - 脲分散体的方法及其在涂料组合物中的用途。