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    Process for the preparation of mono- and oligourethanes
    32.
    发明授权
    Process for the preparation of mono- and oligourethanes 失效
    制备单和双耳的方法

    公开(公告)号：US5210273A

    公开(公告)日：1993-05-11

    申请号：US698871

    申请日：1991-05-13

    Applicant: Helmut Reiff ,  Dieter Dieterich

    Inventor： Helmut Reiff ,  Dieter Dieterich

    IPC: C07C269/00 ,  C07C271/20 ,  C07C271/28

    CPC classification number: C07C269/00

    Abstract: This invention relates to a process for the preparation of N,N-disubstituted mono- and oligourethanes by the reaction of N-aromatically, N-aliphatically, N-cycloaliphatically, and N-araliphatically substituted mono- and oligourethanes with dialkyl carbonates in the presence of at least stoichiometrically equivalent quantities of solid alkali or alkaline-earth carbonate in excess dialkyl carbonate and/or an aprotic organic solvent and in the presence of a phase transfer catalyst.

    Abstract translation: 本发明涉及通过N-芳香，N-脂肪族，N-环芳烃和N-芳香取代的单 - 和二 - 氨基甲酸酯与碳酸二烷基酯的反应来制备N，N-二取代的单 - 和低聚氨酯的方法 至少在化学计量上等效量的固体碱金属或碱土金属碳酸盐在过量的碳酸二烷基酯和/或非质子有机溶剂中并在相转移催化剂存在下进行。

    Process for the production of aqueous polyurethane dispersions
    33.
    发明授权
    Process for the production of aqueous polyurethane dispersions 失效
    生产水性聚氨酯分散体的方法

    公开(公告)号：US5025064A

    公开(公告)日：1991-06-18

    申请号：US547273

    申请日：1990-07-03

    Applicant: Helmut Reiff ,  Otto Lorenz

    Inventor： Helmut Reiff ,  Otto Lorenz

    IPC: C08G18/00 ,  C08G18/08 ,  C08G18/32 ,  C08G18/83

    CPC classification number: C08G18/0823 ,  C08G18/833

    Abstract: The present invention relates to a process for the production of aqueous dispersions of polyurethanes containing chemically incorporated carboxylate groups wherein the counterions to the carboxylate groups are predominantly ammonium ions corresponding to the formula ##STR1## by mixing a starting aqueous dispersion of polyurethanes containing chemically incorporated carboxylate groups wherein the counterions to the carboxylate groups are ammonium ions corresponding to the formula ##STR2## wherein R.sub.1, R.sub.2 and R.sub.3 are the same or different and represent C.sub.1-4 alkyl groups, provided that the total number of carbon atoms in these substituents is 3 to 6,with at least an equivalent quantity of ammonia, based on the trialkyl ammonium ions, and subsequently removing under vacuum at least a portion of the displaced trialkyl amines and the excess ammonia, if present.

    Abstract translation: 本发明涉及一种生产含有化学结合的羧酸酯基团的聚氨酯水分散体的方法，其中羧酸根基团的抗衡离子主要是对应于式（II）的铵离子，通过混合起始的含有聚氨酯的水分散体 化学结合的羧酸酯基团，其中与羧酸酯基团的抗衡离子是对应于式（III）的铵离子，其中R 1，R 2和R 3相同或不同并且表示C 1-4烷基，条件是碳的总数 这些取代基中的原子为3至6，至少有等量的氨，基于三烷基铵离子，随后在真空下除去至少一部分置换的三烷基胺和过量的氨（如果存在）。

    Crosslinked polyurethane-polyurea powders, a process for their production and their use as fillers in two-component polyurethane coating compositions
    34.
    发明授权
    Crosslinked polyurethane-polyurea powders, a process for their production and their use as fillers in two-component polyurethane coating compositions 失效
    交联聚氨酯 - 聚脲粉末，它们的生产方法及其作为双组分聚氨酯涂料组合物中的填料的用途

    公开(公告)号：US5021520A

    公开(公告)日：1991-06-04

    申请号：US495530

    申请日：1990-03-19

    Applicant: Helmut Reiff ,  Dieter Dieterich ,  Rene Stepanek

    Inventor： Helmut Reiff ,  Dieter Dieterich ,  Rene Stepanek

    IPC: C08G18/12 ,  C08G18/28 ,  C08G18/48 ,  C09D175/04

    CPC classification number: C08G18/12 ,  C08G18/283 ,  C08G18/4804 ,  C08G18/4833 ,  C09D175/04

    Abstract: The present invention relates to crosslinked polyurethane-polyurea powders which are prepared by a process which comprises dispersing NCO semiprepolymers in an aqueous medium, forming powders and isolating the powders from the aqueous medium, the NCO semiprepolymers having an NCO content of 10 to 20%, being liquid at room temperature and/or dissolved in isocyanate-inert, water-soluble solvents and based on the reaction product of(a) a polyisocyanate component based on at least one organic polyisocyanate with a polyol component having an average hydroxyl functionality of 2.3 to 4.0 and containing(b) a hydrophobic polyol component containing less than 25% by weight of ethylene oxide units, --CH.sub.2 --CH.sub.2 --O--, and(c) a hydrophilic polyether component comprising monohydric or polyhydric alcohols containing at least 70% by weight of structural units corresponding to the formula ##STR1## The present invention also relates to a process for the preparation of these crosslinked polyurethane-polyurea powders and to their use as fillers in two-component polyurethane coating compositions.

    Abstract translation: 本发明涉及通过以下方法制备的交联聚氨酯 - 聚脲粉末，其包括将NCO半配体聚合物分散在水性介质中，形成粉末并从水性介质中分离出粉末，NCO含量为10-20％的NCO半配位体， 在室温下为液体和/或溶解在异氰酸酯惰性的水溶性溶剂中，并且基于（a）基于至少一种有机聚异氰酸酯的多异氰酸酯组分与平均羟基官能度为2.3至 4.0，并且含有（b）含有小于25重量％的环氧乙烷单元的-CH 2 -CH 2 -O-的疏水多元醇组分和（c）包含至少70重量％的一元或多元醇的亲水性聚醚组分 相应于结构单元的结构单元本发明还涉及制备这些交联聚氨酯 - 聚脲的方法 粉末和作为双组分聚氨酯涂料组合物中的填料的用途。

    Leather tanning with oligourethanes
    39.
    发明授权
    Leather tanning with oligourethanes 失效
    皮革鞣制与低聚氨酯

    公开(公告)号：US4106898A

    公开(公告)日：1978-08-15

    申请号：US718499

    申请日：1976-08-30

    Applicant: Harro Traubel ,  Helmut Reiff ,  Dieter Dieterich

    Inventor： Harro Traubel ,  Helmut Reiff ,  Dieter Dieterich

    IPC: C14C3/18

    CPC classification number: C14C3/18

    Abstract: This invention is concerned with a method of tanning or retanning leather or pelts by treating them with an aqueous liquor containing hydrophilic oligourethanes. The oligourethanes have a molecular weight of from 300 to 20,000 and they may be methylolated. The oligourethanes may be water soluble owing to their hydrophilic segments. The liquor may also contain up to an equal amount of formaldehyde or compounds which split off formaldehyde.

    Abstract translation: 本发明涉及通过用含有亲水性低聚氨酯的含水液体处理皮革或毛皮来鞣制或复鞣的方法。 低聚氨酯的分子量为300至20,000，它们可以是羟甲基化的。 寡聚氨酯由于其亲水链段而可能是水溶性的。 该液体还可含有相等量的甲醛或分解甲醛的化合物。

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