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    High solids polyurethane-urea dispersions having improved storage stability
    96.
    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。

    Process for the production of water-dilutable binders and their use in coating compositions
    100.
    发明授权
    Process for the production of water-dilutable binders and their use in coating compositions 失效
    用于生产水可稀释粘合剂的方法及其在涂料组合物中的用途

    公开(公告)号：US5516853A

    公开(公告)日：1996-05-14

    申请号：US424923

    申请日：1995-04-19

    申请人： Volker Schneider ,  Eberhard Arning ,  Harald Blum ,  Christian Wamprecht

    发明人： Volker Schneider ,  Eberhard Arning ,  Harald Blum ,  Christian Wamprecht

    IPC分类号： C08F8/08 ,  C08F8/14 ,  C08F8/42 ,  C08F8/44 ,  C08F220/04 ,  C08F220/10 ,  C08F220/14 ,  C08F222/04 ,  C09D133/04 ,  C09D133/12

    CPC分类号： C08F8/14 ,  C08F2800/20

    摘要： The present invention relates to a process for the production of oxidatively crosslinkable, water-dilutable binders bya) forming a copolymer having intramolecular carboxylic anhydride groups by copolymerizing anhydride-functional compounds, other olefinically unsaturated monomers and 5 to 50% by weight, based on the weight of the olefinically unsaturated monomers used for the production of the copolymers a), of monomers which cannot be homopolymerized under the reaction conditions,b) subsequently reacting by ring-opening esterification at least 50% of the anhydride groups present in the copolymer with one or more unsaturated monohydric alcohols,c) reacting by ring-opening esterification up to 50% of the anhydride groups with monohydric saturated alcohols having a molecular weight of 32 to 200 either before, during or after step b),d) optionally reacting 1 to 70% of the carboxyl groups formed in steps b) and c) with organic epoxide compounds ande) neutralizing at least a portion of the carboxyl groups formed in steps b) and c).The present invention also relates to the binders obtained by this process and to their use in water-dilutable lacquers and coating compositions.

    摘要翻译： 本发明涉及通过以下方式制备可氧化交联的水可稀释粘合剂的方法：a）通过以下方式形成具有分子内羧酸酐基团的共聚物：通过将酐官能化合物，其它烯属不饱和单体和5-50重量％ 用于生产共聚物a）的烯属不饱和单体的重量，在反应条件下不能均聚的单体，b）随后通过开环酯化反应使共聚物中存在的至少50％的酸酐基团与 一种或多种不饱和一元醇，c）在步骤b）之前，期间或之后，通过开环酯化至多50％酸酐基与分子量为32至200的一元饱和醇反应，d）任选地使1 至70％的步骤b）和c）中形成的羧基与有机环氧化合物反应，e）中和至少一部分 在步骤b）和c）中形成的羧基。 本发明还涉及通过该方法获得的粘合剂及其在水可稀释漆和涂料组合物中的用途。