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    Process for preparing 3,4-dihydro-1,2,3-oxathiazine-4-ones
    3.
    发明授权
    Process for preparing 3,4-dihydro-1,2,3-oxathiazine-4-ones 失效
    制备3,4-二氢-1,2,3-恶噻嗪-4-酮的方法

    公开(公告)号：US3926981A

    公开(公告)日：1975-12-16

    申请号：US47465874

    申请日：1974-05-30

    Applicant: HOECHST AG

    Inventor： CLAUSS KARL ,  SCHNABEL HORST ,  JENSEN HARALD

    IPC: A23L27/30 ,  C07D291/06

    CPC classification number: C07D291/06

    Abstract: Process for preparing 3,4-dihydro-1,2,3-oxathiazine-4-ones and their salts which comprises the addition of chlorosulfonylisocyanate to a Beta -ketocarboxylic acid tert.alkyl ester, conversion of the addition product obtained at temperatures of from 40* to 100*C by means of separation of CO2 and alkylene into the Beta -ketocarboxylic acid amide-Nsulfochloride, by cyclization of same in an aprotic diluent by means of separation of hydrogen chloride - either in the presence of acid-binding agents or by heating up to temperatures above 50*C - and by conversion of the reaction products obtained in known manner into oxathiazinones or salts thereof.

    Abstract translation: 制备3,4-二氢-1,2,3-恶噻嗪-4-酮及其盐的方法，其包括向β-酮羧酸叔烷基酯中加入氯磺酰基异氰酸酯，转化在 通过将CO 2和亚烷基分离成β-酮羧酸酰胺-N-磺酰氯，通过在非质子稀释剂中通过氯化氢的分离将其分离，从而在40℃至100℃下， 结合剂或通过加热至高于50℃的温度，以及通过将以已知方式获得的反应产物转化成氧噻嗪酮或其盐。

    Copolymers of ethylene and n-vinylazetidinones and process for preparing them
    4.
    发明授权
    Copolymers of ethylene and n-vinylazetidinones and process for preparing them 失效
    乙烯和N-乙烯基吡咯烷酮的共聚物及其制备方法

    公开(公告)号：US3565871A

    公开(公告)日：1971-02-23

    申请号：US3565871D

    申请日：1968-10-28

    Applicant: HOECHST AG

    Inventor： BESTIAN HERBERT ,  KAISER EDUARD ,  SCHNABEL HORST

    IPC: C08F10/00

    CPC classification number: C08F10/00 ,  C08F4/28

    Abstract: THE INVENTION PROVIDES COPOLYMERS CONSISTING OF STRUCTURAL UNITS OF ETHYLENE, N-VINYLAZETIDIN-2-ONES AND OPTIONALLY VINYL ACETATE OR ACRYL ESTERS AND A PROCESS FOR THEIR MANUFACTURE. DEPENDING ON THE ETHYLENE PRESSURE APPLIED BRITTLE HARD, RUBBER-ELASTIC OR WAXY AND PLASTIC PRODUCTS ARE OBTAINED WHICH MAY BE USED AS DISPERSION AND EMULSION AUXILIARIES, FOR THE MANUFACTURE OF RUBBERS, OR AS THERMOPLASTIC ADHESIVE.

    Process for preparing secondary N-vinyl carboxylic acid amides
    5.
    发明授权
    Process for preparing secondary N-vinyl carboxylic acid amides 失效
    制备二级N-乙烯基羧酸酰胺的方法

    公开(公告)号：US3914304A

    公开(公告)日：1975-10-21

    申请号：US48953474

    申请日：1974-07-18

    Applicant: HOECHST AG

    Inventor： SCHNABEL HORST ,  MITZLAFF MICHAEL

    IPC: C07C231/00 ,  C07C20060101 ,  C07C67/00 ,  C07C231/12 ,  C07C233/05 ,  C08F20/54 ,  C07C103/34

    CPC classification number: C07C231/12

    Abstract: Secondary N-vinyl carboxylic acid amides having the formula R1CO-NH-CH CH2 (I), wherein R1 represents hydrogen or a lower alkyl group, are prepared by heating N- Alpha -alkoxyethyl carboxylic acid amides having the formula

    wherein R1 has the above signification and R2 represents a lower alkyl group, in a gaseous state to temperatures from about 300* to 600*C, by condensing the gas mixture formed thereby, while rapidly cooling and by working up in known manner. From the products (I) water-soluble polymers having valuable properties may be obtained.

    Abstract translation: 通过加热具有式R 1 CONH-CH-的N-烷氧基乙基羧酸酰胺制备具有式R 1 CO-NH-CH = CH 2（I）（其中R 1表示氢或低级烷基）的次级N-乙烯基羧酸酰胺， CH 3（II），| OR 2，其中R 1具有上述含义并且R 2表示低级烷基，气态为约300-600℃，通过冷凝由此形成的气体混合物，同时快速冷却和通过工作 以已知的方式。 从产物（I）可以获得具有有价值性质的水溶性聚合物。

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