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    • 81. 发明授权
    • Process for the preparation of alkoxytriazolinones
    • 制备烷氧基三唑啉酮的方法
    • US5703260A
    • 1997-12-30
    • US714668
    • 1996-09-16
    • Heinz-Jurgen WroblowskyKlaus Konig
    • Heinz-Jurgen WroblowskyKlaus Konig
    • C07C281/06C07D249/12
    • C07D249/12C07C281/06
    • Alkoxytriazolinones of the general formula (I), ##STR1## in which R.sup.1 represents hydrogen, or represents in each case optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkylalkyl, aryl or arylalkyl, and R.sup.2 represents in each case optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkylalkyl, ary or arylalkyl, (which can be used as intermediates for the preparation of herbicidal active compounds) are obtained in very good yields and in high purity by reacting imino(thio)carbonic esters (II) with alkoxyethyl carbazinates (III) ##STR2## in which Q represents O or S, R.sup.3 represents (for example) alkyl, aryl or aralkyl and R.sup.4 represents (for example) alkyl, at -20.degree. C. to +150.degree. C. (1st step) and subjecting the new semicarbazide derivatives (IV) ##STR3## which are formed with elimination of R.sup.3 --QH, if appropriate after intermediate isolation, to a cyclizing condensation reaction at 0.degree. C. to 200.degree. C., without the addition of a base, advantageously under reduced pressure, with the elimination of alkoxyethanols (2nd step).
    • 通式(I)的烷氧基​​三唑啉酮,其中R 1表示氢,或在每种情况下表示任选取代的烷基,烯基,炔基,环烷基,环烷基烷基,芳基或芳基烷基,和R 2表示在各种情况下任选取代的 通过使亚氨基(硫代)碳酸酯(II)反应,以非常好的产率和高纯度获得烷基,链烯基,炔基,环烷基,环烷基烷基,芳基或芳烷基(可用作制备除草活性化合物的中间体) 其中Q代表O或S,R3代表(例如)烷基,芳基或芳烷基,R4代表(例如)烷基,在-20℃至+ 150℃(第1步),在0℃〜200℃进行环化缩合反应,在中间分离后,如果合适,将R3-QH所形成的新的氨基脲衍生物(IV) 没有添加基地,优势 在减压下,剔除烷氧基乙醇(第二步)。
    • 90. 发明授权
    • Process for the production of polyisocyanate mixtures containing
uretdione and isocyanurate groups
    • 制备含有脲二酮和异氰脲酸酯基团的多异氰酸酯混合物的方法
    • US5043092A
    • 1991-08-27
    • US323538
    • 1989-03-13
    • Josef PedainKlaus KonigWinfried Dell
    • Josef PedainKlaus KonigWinfried Dell
    • C07B61/00C07D229/00C07D251/34C08G18/78C08G18/79C09D175/00C09D175/04
    • C08G18/792C07D229/00C07D251/34C08G18/798C08G2150/20
    • The present invention is directed to a process for the production of polyisocyanate mixtures containing isocyanurate groups and uretdione groups in a molar ratio of about 1:9 to 9:1 by oligomerizing a portion of the isocyanate groups of hexamethylene diisocyanate using trialkyl phosphines and/or peralkylated phosphorus acid triamides as the catalysts which accelerate the dimerization and trimerization of isocyanate groups, terminating the reaction at the desired degree of oligomerization by the addition of a catalyst poison and removing unreacted hexamethylene diisocyanate to a residual content of at most 0.5% by weight, characterized in that, before addition of the catalyst, the hexamethylene diisocyanate starting material is freed from carbon dioxide to a residual content of less than 20 ppm (weight).The present invention is also directed to the polyisocyanates containing uretdione groups and isocyanurate groups obtainable by this process and their use, optionally blocked by blocking agents for isocyanate groups, as the isocyanate component for the production of polyisocyanate polyaddition products.
    • 本发明涉及通过使用三烷基膦和/或它们的一部分使六亚甲基二异氰酸酯的一部分异氰酸酯基团低聚而制备含有摩尔比为约1:9至9:1的异氰脲酸酯基和脲二酮基团的多异氰酸酯混合物的方法和/或 全烷基化的磷酸三酰胺作为加速异氰酸酯基团的二聚和三聚的催化剂,通过加入催化剂毒物终止反应在所需的低聚度程度,并除去未反应的六亚甲基二异氰酸酯至残余含量至多0.5重量% 其特征在于,在加入催化剂之前,将六亚甲基二异氰酸酯原料从二氧化碳中除去至少于20ppm(重量)的残留量。 本发明还涉及含有脲二酮基团和异氰脲酸酯基团的多异氰酸酯基团,其可通过该方法获得,并且其用途,任选地被异氰酸酯基团的封闭剂封闭,作为用于制备多异氰酸酯加聚产物的异氰酸酯组分。