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73 条记录 (耗时 0.011 秒)

    Process for preparing polyamides
    43.
    发明授权
    Process for preparing polyamides 失效
    制备聚氨酯的方法

    公开(公告)号：US3715340A

    公开(公告)日：1973-02-06

    申请号：US3715340D

    申请日：1971-08-19

    申请人： FOSTER GRANT CO INC

    发明人： FINESTONE A ,  SIMS W

    IPC分类号： C08G69/08 ,  C08G69/16 ,  C08G20/18

    CPC分类号： C08G69/08 ,  C08G69/16

    摘要： A METHOD OF PREVENTING THE FORMATION OF GEL IN POLYAMIDES PREPARED FROM AMINOCARBOXYLIC ACIDS OF LACTAMS COMPRISING ADDING TO THE CORRESPONDING MONOMER PRIOR TO ITS POLYMERIZATION ABOUT 0.025 TO 0.5 MOLE, PER 100 MOLES OF MONOMER, OF AN ALKYL AMMONIUM AROMATIC ACID SALT OR AN ALKYLENE BIS AMMONIUM AROMATIC ACID SALT.

    Process for preparing mineral reinforced polylactam compositions
    47.
    发明授权
    Process for preparing mineral reinforced polylactam compositions 失效
    制备矿物强化聚酰胺组合物的方法

    公开(公告)号：US3622535A

    公开(公告)日：1971-11-23

    申请号：US3622535D

    申请日：1969-01-27

    申请人： MONSANTO CO

    发明人： GREENLEY ROBERT Z ,  SUGERMAN JERRY M

    IPC分类号： C08G69/18 ,  C08K9/06 ,  C08G20/18 ,  C08G51/04 ,  C09C3/00

    CPC分类号： C08G69/18 ,  C08K9/06 ,  C08L77/00

    摘要： Improved lactam slurries containing a major amount of a mineral reinforcing agent suitable for conversion to a reinforced polylactam composition by the initiated, anionic polymerization process and essentially containing an effective amount of from about 0.1 to about 1.0 weight percent, based on the mineral, of an adduct prepared by the reaction of (1) a higher alkylbenzenesulfonic acid, wherein the alkyl group contains from nine to 15 carbon atoms, with (2) an omega aminoalkylenetrialkoxysilane, wherein the alkylene group contains from two to 10 carbon atoms and each of the alkoxy groups contain from one to three carbon atoms. The presence of said adduct acts as a fluidifying agent to provide a lower viscosity slurry at a given mineral concentration enabling better filling of molds in the cast-polymerization process and/or permitting the use of slurry compositions with higher mineral concentrations with processing equipment operating near the upper limit of prior art mineral concentration for any particular mineral-lactam composition.

    Method of manufacturing polyamides by alkaline polymerization of lactams having an at least 7-membered ring
    49.
    发明授权
    Method of manufacturing polyamides by alkaline polymerization of lactams having an at least 7-membered ring 失效
    通过碱性聚合制备聚氨酯的方法，具有至少7个成员的环

    公开(公告)号：US3600360A

    公开(公告)日：1971-08-17

    申请号：US3600360D

    申请日：1968-07-12

    申请人： CESKOSLOVENSKA AKADEMIE VED

    发明人： BUKAC ZBYNEK ,  TOMKA JIRI ,  SEBENDA JAN

    IPC分类号： B62D1/06 ,  C08G69/20 ,  C08G20/18

    CPC分类号： C08G69/20

    摘要： THE METHOD CONSISTS IN CARRYING OUT THE KNOWN ALKALINE POLYMERIZATION OF LACTAMS, HAVING AN AT LEAST SEVEN-MEMBERED RING, IN THE PRESENCE OF A COMPOUND OF THE GENERAL FORMULA

    (R1-CO-C(-R2)(-R3)-CO-NH)N-X

    WHEREIN X IS THE REST OF THE USED AMINE WITH N AMINO GROUPS, R1, R2 AND R3 ARE ALKYL, CYCLOALKYL, ARYL OR ARALKYL GROUPS WITH 1 TO 18 CARBON ATOMS, EITHER SEPARATED OR FORMING TOGETHER A RING, N IS AN INTEGER, AND EITHER R2 OR R3 CAN BE ALSO A HYDROGEN ATOM, IF N IS GREATER THAN 1. THE REST X CAN BE EITHER PLAIN OR SUBSTITUTED HYDROCARBON RADICAL SUCH AS ALKYLENE, ARYLENE, DIALKYL ETHER, DIALKYL THIOETHER, DIARYL THIOETHER, DIARYLSULFONE, DIALKYL AMINE, DIARYL AMINE, POLYVINYL- OR POLYSTYRYL REST DERIVED FROM THE CORRESPONDING AMINE WITH N AMINO GROUPS. ANY SUBSTITUENT ON THE REST X, WHICH DOES NOT INTERFERE WITH ACTIVATED ALKALINE POLYMERIZATION OF LACTAMS CAN BE USED, THAT IS ANY CHEMICALLY INERT, NON-ACIDIC SUBSTITUENT SUCH AS ALKYL, ALKOXYL AND THE LIKE.