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21 条记录 (耗时 0.06 秒)

    Polymers of 2-pyrrolidone
    1.
    发明授权
    Polymers of 2-pyrrolidone 失效
    2-吡咯烷酮聚合物

    公开(公告)号：US3721652A

    公开(公告)日：1973-03-20

    申请号：US3721652D

    申请日：1970-09-03

    申请人： RADIATION RES CORP

    发明人： BARNES C

    IPC分类号： C08G69/24 ,  D01F6/60 ,  C08G20/16

    CPC分类号： C08G69/24 ,  D01F6/605

    摘要： 2-PYRROLIDONE IS POLYMERIZED TO A NEW WHITE, HIGH MOLECULAR WEIGHT POLYMER BEING PARTICULARLY SUITABLE FOR MELT EXTRUSION INTO FIBERS, FILMS AND OTHER SHAPED ARTICLES, A CONTINUOUS PROCESS OF POLYMERIZATION IS DESCRIBED.

    Polymerization of 2-pyrrolidone using n-acyl compounds as co-activators with carbon dioxide as activator
    3.
    发明授权
    Polymerization of 2-pyrrolidone using n-acyl compounds as co-activators with carbon dioxide as activator 失效
    使用N-亚乙基化合物作为辅助活化剂与二氧化碳作为活化剂的聚合作用

    公开(公告)号：US3681295A

    公开(公告)日：1972-08-01

    申请号：US3681295D

    申请日：1970-09-03

    申请人： RADIATION RES CORP

    发明人： JAROVITZKY PETER A

    IPC分类号： C08G69/24 ,  C08G20/16

    CPC分类号： C08G69/24

    摘要： AN IMPROVED PROCESS FOR THE POLYMERIZATION OF 2PYRROLIDONE TO PROVIDE HIGH MOLECULAR WEIGHTS AND HIGH RATES OF CONVERSIN COMPRISING POLYMERIZING 2-PYRROLIDONE IN THE PRESENCE OF AN ALKALINE POLYMERIZATION CATALYST, CARBON DIOXIDE, AND NOT MORE THAN 7 MILLIMOLS OF AN ACYL COMPOUND PER MOL OF THE ALKALINE POLYMERIZATION CATALYST. THE ACYL COMPOUND CAN CONVENIENTLY BE ANY OF THE ACYL COMPOUNDS PREVIOUSLY DISCLOSED AS POLYMERIZATION ACTIVATORS IN THE POLYMERIZATION OF 2-PYRROLIDONE.

    Process for the polymerization of 2-pyrrolidone with carbon dioxide as activator
    7.
    发明授权
    Process for the polymerization of 2-pyrrolidone with carbon dioxide as activator 失效
    用二氧化碳作为活化剂聚合2-吡咯烷酮的方法

    公开(公告)号：US3682869A

    公开(公告)日：1972-08-08

    申请号：US3682869D

    申请日：1970-09-03

    申请人： RADIATION RES CORP

    发明人： JAROVITZKY PETER A

    IPC分类号： C08G69/24 ,  C08G20/16

    CPC分类号： C08G69/24

    摘要： IN THE POLYMERIZATION OF 2-PYRROLIDONE IN THE PRESENCE OF AN ALKALINE POLYMERIZATION CATALYST AND CARBON DIOXIDE, THE IMPROVEMENT WHICH COMPRISES ADDING SAID CARBON DIOXIDE TO A CONCENTRATED REACTION MASS HAVING A MOLAR RATIO OF FROM ABOUT 1 TO ABOUT 4 MOLS OF 2-PYRROLIDONE PER MOL OF ALKALINE POLYMERIZATION CATALYST AND THEN DILUTING SAID CONCENTRATED, CARBONATED REACTION MASS WITH AN AMOUNT OF 2-PYRROLIDONE SUFFICIENT TO PROVIDE AT LEAST 9 MOLS OF TOTAL 2-PYRROLIDONE PER MOL OF ALKALINE POLYMERIZATION CATALYST BEFORE SAID CARBONATED REACTION MASS IS POLYMERIZED.