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    Process for polyisocyanates
    1.
    发明授权
    Process for polyisocyanates 失效
    多异氰酸酯工艺

    公开(公告)号：US4465639A

    公开(公告)日：1984-08-14

    申请号：US461247

    申请日：1983-01-26

    申请人： Richard Hatfield, Jr.

    发明人： Richard Hatfield, Jr.

    IPC分类号： C07C265/14 ,  C07C67/00 ,  C07C241/00 ,  C07C263/10 ,  C08G18/76 ,  C08G18/80 ,  C07C118/02 ,  C07C119/048

    CPC分类号： C07C263/10 ,  C08G18/7664 ,  C08G18/8045

    摘要： Addition of controlled amounts of water to the reaction mixture produced by phosgenation of a mixture of polymethylene polyphenyl polyamines (and like polyamines produced by condensation of formaldehyde and aromatic amines) prior to complete removal of excess phosgene gives rise to the corresponding polymethylene polyphenyl polyisocyanates having significantly improved properties. Not only is the color of the product, and of polyurethane foams prepared therefrom, significantly lighter but the proportion of higher molecular weight products is significantly less and the viscosity is less. No undesirable by-products are introduced into the polyisocyanate as a result of the process.

    摘要翻译： 在完全去除过量的光气之前，通过多亚甲基多苯基多胺（和类似于通过甲醛和芳族胺的缩合产生的多胺）的混合物的光气化产生的反应混合物中加入受控量的水，导致相应的多亚甲基多苯基多异氰酸酯具有显着的 改善性能。 不仅产品的颜色和由其制备的聚氨酯泡沫的颜色明显较浅，而且较高分子量产品的比例明显较小，粘度较低。 作为该方法的结果，不会将不期望的副产物引入到多异氰酸酯中。

    Method of manufacturing aromatic isocyanates
    3.
    发明授权
    Method of manufacturing aromatic isocyanates 失效
    制备芳族异氰酸酯的方法

    公开(公告)号：US4096165A

    公开(公告)日：1978-06-20

    申请号：US737822

    申请日：1976-11-01

    申请人： Bernard A. Meyers

    发明人： Bernard A. Meyers

    IPC分类号： C07C265/00 ,  C07C20060101 ,  C07C67/00 ,  C07C241/00 ,  C07C263/10 ,  C07C265/12 ,  C07C118/02

    CPC分类号： C07C263/10

    摘要： The reaction of aromatic amines with phosgene takes place in the mixing zone of a plug flow reactor to form both the product isocyanate as well as the intermediate carbamyl chloride. The aromatic amine dissolved in an inert diluent is fed to the center portion of the plug flow reactor while the phosgene is fed to the annular space. The reactor is designed so as to eliminate back-mixing at the feed zone and thus to avoid reaction of any isocyanate formed with the incoming aromatic amine which produces in turn undesirable by-products such as urea and tar. Cold phosgene that is fed into the annular space cools the wall sufficiently to inhibit the reaction to TDI. By heating the wall such as with the installation of a heating jacket to counteract the cooling effect of phosgene, the wall of the reactor is maintained above 90.degree. C. and thus any solid carbamyl chloride that migrates to the wall is reacted to the isocyanate, eliminating pluggage of the reactor from solids build-up.

    摘要翻译： 芳族胺与光气的反应发生在活塞流反应器的混合区中以形成产物异氰酸酯以及中间体氨基甲酰氯。 将溶解在惰性稀释剂中的芳族胺进料到活塞流反应器的中心部分，同时将光气送入环形空间。 反应器被设计成消除进料区的反混合，从而避免与进入的芳族胺形成的任何异氰酸酯的反应，这产生不希望的副产物如尿素和焦油。 进入环形空间的冷光气充分冷却壁以抑制对TDI的反应。 通过加热壁，例如通过安装加热套来抵消光气的冷却效果，反应器的壁保持在90℃以上，因此迁移到壁上的任何固体氨基甲酰氯与异氰酸酯反应， 消除反应堆的固体堆积物的堆放。

    Process for the production of polyisocyanates
    4.
    发明授权
    Process for the production of polyisocyanates 失效
    多异氰酸酯的制备方法

    公开(公告)号：US3952042A

    公开(公告)日：1976-04-20

    申请号：US522618

    申请日：1974-11-11

    申请人： Hartmut Knofel

    发明人： Hartmut Knofel

    IPC分类号： C07C265/14 ,  C07C67/00 ,  C07C241/00 ,  C07C263/10 ,  C07C265/12 ,  C07C271/06 ,  C08G18/76 ,  C07C118/02 ,  C07C119/048

    CPC分类号： C07C263/20 ,  C07C263/10 ,  C08G18/7664

    摘要： A process is provided for making a mixture of diisocyanate and polyisocyanates having more than two amino groups of the diphenylmethane series which has a low content of the o-isomers wherein a mixture of aniline and a polyamine prepared by condensation of aniline and formaldehyde is condensed with formaldehyde, at least 90% of the amino groups in the mixture being protonized with an acid, and phosgenating the resulting condensation product to form corresponding polyisocyanates.

    摘要翻译： 提供了一种制备二苯基甲烷系列具有多于两个氨基的二异氰酸酯和多异氰酸酯的混合物的方法，所述二苯基甲烷系列具有低含量的异构体，其中通过苯胺和甲醛的缩合制备的苯胺和多胺的混合物与 甲醛中，混合物中至少90％的氨基被酸质子化，并使得到的缩合产物光气化以形成相应的多异氰酸酯。

    Process for the preparation of 2-fluoro-2,2-dinitroethyl isocyanate
    5.
    发明授权
    Process for the preparation of 2-fluoro-2,2-dinitroethyl isocyanate 失效
    2-氟-2,2-二硝基乙基异氰酸酯的制备方法

    公开(公告)号：US4097513A

    公开(公告)日：1978-06-27

    申请号：US749892

    申请日：1976-12-13

    申请人： Alain G. Becuwe ,  Jean-Pierre G. Senet ,  Claude M. Ucciani

    发明人： Alain G. Becuwe ,  Jean-Pierre G. Senet ,  Claude M. Ucciani

    IPC分类号： C07C265/04 ,  C07C118/02 ,  C07C119/042

    CPC分类号： C07C265/00

    摘要： A process for the synthesis of 2-fluoro-2,2-dinitroethyl isocyanate which comprises reacting phosgene with 2-fluoro-2,2-dinitro-ethylamine in solution at a temperature of -15.degree. - +5.degree. C to obtain 2-fluoro-2,2-dinitro-carbamyl chloride in a first step and then decomposing said carbamyl chloride in a second step at a temperature between 20.degree. and 50.degree. C while passing through the solution a stream of an inert anhydrous gas.

    摘要翻译： 一种合成2-氟-2,2-二硝基乙基异氰酸酯的方法，其包括在-15℃-5℃的温度下使光气与2-氟-2,2-二硝基乙胺反应，得到2- 氟代-2,2-二硝基 - 氨基甲酰氯，然后在20℃至50℃之间的温度下分解所述氨基甲酰氯，同时通过溶液中惰性无水气体流。

    Diisocyanates of the diphenyl methane series and processes for the production thereof
    9.
    发明授权
    Diisocyanates of the diphenyl methane series and processes for the production thereof 失效
    二苯甲烷系二异氰酸酯及其制备方法

    公开(公告)号：US4587058A

    公开(公告)日：1986-05-06

    申请号：US290983

    申请日：1981-08-07

    申请人： Hartmut Knofel ,  Michael Brockelt

    发明人： Hartmut Knofel ,  Michael Brockelt

    IPC分类号： C08G18/00 ,  C07C67/00 ,  C07C205/06 ,  C07C241/00 ,  C07C263/10 ,  C07C265/12 ,  C07C265/14 ,  C08G18/76 ,  C07C118/02 ,  C07C119/048

    CPC分类号： C07C265/12 ,  C07C205/06 ,  C08G18/7671

    摘要： A diisocyanate corresponding to the general formula: ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 represent hydrogen or a C.sub.2 -C.sub.12 alkyl group provided that two of the radicals R.sub.1, R.sub.2 and R.sub.3 represent hydrogen and the third represents an alkyl group containing from 2 to 12 carbon atoms. Mixtures of diisocyanates in which the described diisocyanate is a major substituent are also within the scope of this disclosure. Such compounds and mixtures are made by reacting a nitrobenzyl halide, an unsubstituted benzyl halide or a benzyl alcohol in the presence of a Friedel-Crafts catalyst with an alkylbenzene or a nitroalkylbenzene and then converting the nitro groups to amino groups by hydrogenation or reduction. The thus-produced amino compound is then phosgenated to form the diisocyanate.The compounds and mixtures of the present invention are useful in the production of polyurethane plastics.

    摘要翻译： 其中R 1，R 2和R 3表示氢或C 2 -C 12烷基的通式为：其中R1，R2和R3中的两个表示氢，第三个表示含有2个 至12个碳原子。 其中所述二异氰酸酯是主要取代基的二异氰酸酯的混合物也在本公开的范围内。 这样的化合物和混合物通过硝基苄基卤，未取代的苄基卤或苯甲醇在Friedel-Crafts催化剂存在下与烷基苯或硝基烷基苯反应，然后通过氢化或还原将硝基转化成氨基来制备。 然后将由此产生的氨基化合物光气化以形成二异氰酸酯。 本发明的化合物和混合物可用于生产聚氨酯塑料。

    Preparation of alkyl isocyanates
    10.
    发明授权
    Preparation of alkyl isocyanates 失效
    烷基异氰酸酯的制备

    公开(公告)号：US4384999A

    公开(公告)日：1983-05-24

    申请号：US195648

    申请日：1980-10-09

    申请人： Placido M. Spaziante ,  Luigi Giuffre ,  Giancarlo Sioli ,  Mirco Fornaroli

    发明人： Placido M. Spaziante ,  Luigi Giuffre ,  Giancarlo Sioli ,  Mirco Fornaroli

    IPC分类号： C07C263/10 ,  C07C265/04 ,  C07C118/02

    CPC分类号： C07C263/10

    摘要： A novel process for the preparation of alkyl isocyanates comprising reacting COX.sub.2 and an alkyl amine hydrohalide of the formulaR-NH.sub.2.HX Iwherein R is alkyl of 1 to 3 carbon atoms and X is a halogen either under pressure in an inert organic solvent or under atmospheric pressure in a high boiling organic solvent to form the corresponding alkyl carbamoyl halide, reacting the latter in an organic solvent with an urea of the formula ##STR1## wherein X' is selected from the group consisting of oxygen and sulfur, R.sub.1 and R.sub.3 are individually selected from the group consisting of alkyl of 1 to 7 carbon atoms, cycloalkyl of 4 to 6 carbon atoms and phenyl and R.sub.2 and R.sub.4 are individually selected from the group consisting of hydrogen, alkyl of 1 to 7 carbon atoms, cycyloalkyl of 4 to 6 carbon atoms and phenyl to obtain the corresponding alkyl isocyanate.

    摘要翻译： 一种用于制备烷基异氰酸酯的新方法，其包括使COX 2与式R-NH 2 .HX I的烷基胺氢卤酸反应，其中R是1至3个碳原子的烷基，X是卤素，在惰性有机溶剂中或在压力下， 在大气压下在高沸点有机溶剂中形成相应的烷基氨基甲酰卤，使其在有机溶剂中与下式的脲反应，其中X'选自氧和硫，R 1和 R3分别选自1至7个碳原子的烷基，4至6个碳原子的环烷基和苯基，R2和R4分别选自氢，1至7个碳原子的烷基，氰基烷基 4至6个碳原子和苯基，以获得相应的烷基异氰酸酯。