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73 条记录 (耗时 0.012 秒)

    Process for the polymerization of dodecalactam in the presence of potassium carbonate
    2.
    发明授权
    Process for the polymerization of dodecalactam in the presence of potassium carbonate 失效
    在碳酸钾存在下十二内酰胺聚合的方法

    公开(公告)号：US3883608A

    公开(公告)日：1975-05-13

    申请号：US43519274

    申请日：1974-01-21

    申请人： AQUITAINE TOTAL ORGANICO

    发明人： HEBERT REMY

    IPC分类号： C08G69/16 ,  C08G20/18

    CPC分类号： C08G69/16

    摘要： This invention concerns a process for the polymerization of dodecalactam in the presence of potassium hydroxide or potassium carbonate and water, offering a fast way of obtaining a high yield of polyamides with high molecular weight and with excellent resistance of degradation, and consequently hydrolysis, when kept in contact with boiling water. Polymerization is carried out, preferably at between 290* and 320*C, in the presence of between 0.05 and 2.5% of potassium hydroxide or potassium carbonate. The polymers thus obtained can be readily used to manufacture molded articles, sheets, tubes or pipes, by extrusion, injection or blowing.

    摘要翻译： 本发明涉及一种在氢氧化钾或碳酸钾和水存在下聚合十二内酰胺的方法，提供了一种快速获得高产量聚酰胺的方法，该方法具有高分子量和优异的降解性，并因此在保存时具有优异的抗水解性 与沸水接触。

    Hydrogen transfer polymerization of 2-pyrrolidone with anionic catalyst
    3.
    发明授权
    Hydrogen transfer polymerization of 2-pyrrolidone with anionic catalyst 失效
    2-吡咯烷酮与阴离子催化剂的氢转移聚合

    公开(公告)号：US3842047A

    公开(公告)日：1974-10-15

    申请号：US34403673

    申请日：1973-03-22

    申请人： PUSZTASZERI S

    发明人： PUSZTASZERI S

    IPC分类号： C08G69/24 ,  C08G20/18

    CPC分类号： C08G69/24

    摘要： 1. PROCESS FOR THE POLYMERIZATION OF SUBSTANTIALLY PURE, SUBSTANTIALLY ANHYDROUS 2-PYRROLIDONE WHICH COMPRISES THE STEPS OF: (A) MIXING THE 2-PYRROLIDONE WITH A SUBSTANTIALLY ANHYDROUS ALKALINE REACTANT SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS, ALKALI METAL HYDROXIDES AND ALKALI METAL BICARBONATES IN A MOLE RATIO OF FROM ABOUT 10:1 TO 27:1; (B) HEATING SAID MIXTURE UNDER VACUUM TO A TEMPERATURE OF FROM 100* TO 120*C. TO REACTED THE ALKALINE REACTANT WITH THE 2-PYRROLIDINE AND THE ALKALI METAL SALT COMPRISING 2-PYRROLIDONE AND THE ALKALI METAL SALT OF 2-PYRROLIDONE AND TO DISTILL OFF THE WATER FORMED IN THE REACTION MIXTURE; (C) COOLING THE REACTION MIXTURE TO ROOM TEMPERATURE ; (D) BUBBLING A DRY GAS SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE, NITROGEN DIOXIDE AND SULFUR DIOXIDE THROUGH THE PREVIOUSLY COOLED REACTION MIXTURE IN AN AMOUNT SUFFICIENT TO REACT WITH SUBSTANTIALLY ALL OF THE METAL IN THE 2-PYRROLIDONE SALT; (E) MIXING THE MIXTURE OF STEP (D) WITH BETWEEN ABOUT 1-5% BY WEIGHT, BASED UPON THE WEIGHT OF THE REACTION MIXTURE, OF AN INERT DRYING AGENT; AND (F) HEATING TO A TEMPERATURE OF FROM 48* C TO 52*C. FOR AT LEAST ABOUT 40 HOURS TO PRODUCE A FILAMENT FORMING POLYMER.

    Cationic dyeable polyamide of improved physical properties
    4.
    发明授权
    Cationic dyeable polyamide of improved physical properties 失效
    改进的物理性能的阳离子可聚酰胺

    公开(公告)号：US3828009A

    公开(公告)日：1974-08-06

    申请号：US28662972

    申请日：1972-09-06

    申请人： ALLIED CHEM

    发明人： LOFQUIST R

    IPC分类号： C08G69/00 ,  C08G69/02 ,  C08G69/08 ,  C08G69/42 ,  C08G20/18

    CPC分类号： C08G69/42 ,  C08G69/02

    摘要： A CATIONIC-DYEABLE POLYAMIDE, POLYMERIZED FROM WAMINOCARBOXYLIC ACIDS OR THEIR LACTAMS, OF IMPROVED PHYSICAL PROPERTIES CAN BE MADE BY USING FROM 0.30 TO 0.85 MOLE PERCENT (BASED ON THE POLYAMIDE) OF THE SODIUM SALT OF A DIACID SUCH AS 5-SULFOISOPHTHALIC ACID AND 0.10 TO 0.65 MOLE PERCENT OF AN N-SULFOALKYL ALKYLDIAMINE SUCH AS N-(4-SULFOBUTYL)HEXAMETHYLENEDIAMINE, OR N(2-SULFOETHYL)M-XYLYLENEDIAMINE. A POLYAMIDE RESULTS CONTAINING THE RESPECTIVELY SAME NUMBER OF SULFO GROUPS, BUT WITH LESS DILUENT AND CONSEQUENTLY HAVING A HIGHER MELTING POINT. THE DIACID CAN BE A SULFONATE DERIVATIVE OF A PHTHALIC ACID, OR OF FLUORENE, ETC. THE DIAMINE CAN BE A SULFONATE DERIVATIVE OF HEXAMETHYLENEDIAMINE, METAZYLYLENEDIAMINE, ETC. THE USE OF THE COMBINATION OF ADDITIVES ELIMINATES THE NECESSITY OF ADDING A DIAMIE OR DICARBOXYLIC ACID TO ACHIEVE FULL POLYMERIZATION.

    Process for the anionic polymerization of lactams
    5.
    发明授权
    Process for the anionic polymerization of lactams 失效
    LACTAMS的阴离子聚合方法

    公开(公告)号：US3793258A

    公开(公告)日：1974-02-19

    申请号：US3793258D

    申请日：1971-07-16

    申请人： BAYER AG

    发明人： REINKING K ,  BRASSAT B ,  SCHNEIDER K

    IPC分类号： C08G69/20 ,  C08G20/18

    CPC分类号： C08G69/20

    摘要： THE INVENTION RELATES TO AN IMPROVED PROCESS FOR THE ANIONIC POLYMERIZATION OF A LACTAM HAVIMG ATLEAST 5 RING MEMBERS IN THE PRESENCE OF AN ALKALINE CATALYST AND AN ACTIVATOR, WHEREIN AN ALKALI METAL LACTAMATE, THE CATALYST, DISSOLVED IN A MIXTURE OF A A-PYRROLIDONE AND A LACTAM MEMBER SELECTED FROM THE GROUPS CONSISTING OF A SINGLE LACTAMAND A MIXTURE OF LACTAMS HAVING AT LEAST 6 RING MEMBERS, IS ADDED TO THE LACTAM MELT CONTAINING THE ACTIVATOR.

    Process for the anionic polymerization of lactams
    6.
    发明授权
    Process for the anionic polymerization of lactams 失效
    LACTAMS的阴离子聚合方法

    公开(公告)号：US3772253A

    公开(公告)日：1973-11-13

    申请号：US3772253D

    申请日：1972-05-18

    申请人： BAYER AG

    发明人： BRASSAT B

    IPC分类号： C08G69/20 ,  C08G20/18

    CPC分类号： C08G69/20

    摘要： AN IMPROVED PROCESS FOR THE PRODUCTION OF POLYAMIDES BY ACTIVATED ANIONIC POLYMERIZATION OF A POLYMERIZABLE MIXTURE COMPRISING A LACTAM, A CTALYST AND AN ACTIVATOR, WHEREIN AN ALUMINUM ALCOHOLATE IS ADDED TO SAID MIXUTRE.

    Dodecanolactam polymerization process
    9.
    发明授权
    Dodecanolactam polymerization process 失效
    DODECANOLACTAM聚合方法

    公开(公告)号：US3607839A

    公开(公告)日：1971-09-21

    申请号：US3607839D

    申请日：1968-05-06

    申请人： ICI LTD

    发明人： MCGRATH HARRY

    IPC分类号： C08G69/20 ,  C08G20/18

    CPC分类号： C08G69/20

    摘要： Anhydrous polymerization of dodecanolactam by heating with an alkaline catalyst and an amide R1CONHR2 wherein one of R1/R2 is aryl and the other is aryl, alkyl or cycloalkyl.