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15 条记录 (耗时 0.015 秒)

    Yttrium and rare earth compounds catalyzed lactone polymerization
    2.
    发明授权
    Yttrium and rare earth compounds catalyzed lactone polymerization 失效
    钇和稀土化合物催化内酯聚合

    公开(公告)号：US5095098A

    公开(公告)日：1992-03-10

    申请号：US680165

    申请日：1991-04-03

    申请人： Stephan J. McLain ,  Neville E. Drysdale

    发明人： Stephan J. McLain ,  Neville E. Drysdale

    IPC分类号： C08G63/08 ,  C08G63/82

    CPC分类号： C08G63/08 ,  C08G63/823

    摘要： Process for yttrium and rare earth compound catalyzed polymerization of lactones and the living polymer compositions of such polymerizations, novel polyester products of such polymerizations and novel yttrium and rare earth metal compounds useful as catalysts in the polymerization of biodegradable polymers for medical uses and flexible films for packaging.

    摘要翻译： 内酯和稀土化合物催化聚合的方法和这种聚合的活性聚合物组合物，这种聚合的新型聚酯产物和用作用于医疗用途的可生物降解聚合物的聚合中的催化剂的新型钇和稀土金属化合物，以及柔性膜 打包。

    Continuous reduced pressure dimeric cyclic ester production
    3.
    发明授权
    Continuous reduced pressure dimeric cyclic ester production 失效
    连续减压二聚环酯生产

    公开(公告)号：US5288881A

    公开(公告)日：1994-02-22

    申请号：US848188

    申请日：1992-03-12

    申请人： Neville E. Drysdale ,  Kang Lin ,  Thomas W. Stambaugh

    发明人： Neville E. Drysdale ,  Kang Lin ,  Thomas W. Stambaugh

    IPC分类号： C07D319/12

    CPC分类号： C07D319/12

    摘要： An improved process for converting oligomers of alphahydroxycarboxylic acids, such as glycolic and lactic acid, to dimeric cyclic esters, such as glycolide and lactide. The continuous process is conducted at reduced pressures and depolymerizing temperatures in a heated columnar depolymerization zone, coupled with an essentially unheated receiver for unconverted oligomer. By feeding the oligomer to the upper end of the column while coordinating the feed rate with the depolymerization temperature such that a fraction of the oligomer is converted to a vapor product stream containing the cyclic ester and another fraction of the oligomer exits the column at its lower end and passes to the receiver vessel, the dimeric cyclic ester is produced at high production rates and the oligomer is subjected to minimal thermal stress.

    摘要翻译： 用于将α-羟基羧酸（例如乙醇酸和乳酸）的低聚物转化为二聚环酯如乙交酯和丙交酯的改进方法。 连续方法在加热的柱状解聚区中的减压和解聚温度下进行，与用于未转化的低聚物的基本上不加热的接收体偶联。 通过将低聚物进料到塔的上端，同时使进料速率与解聚温度协调，使得低聚物的一部分转化成含有环酯的蒸气产物流，另一部分低聚物在其下部离开塔 结束并传递到接收容器，二聚环酯以高生产率生产，并且低聚物经受最小的热应力。

    Solventless dimeric cyclic ester distillation process
    4.
    发明授权
    Solventless dimeric cyclic ester distillation process 失效
    无溶剂二次循环蒸馏处理

    公开(公告)号：US5236560A

    公开(公告)日：1993-08-17

    申请号：US813189

    申请日：1992-03-13

    申请人： Neville E. Drysdale ,  Thomas W. Stambaugh ,  James V. Tarbell

    发明人： Neville E. Drysdale ,  Thomas W. Stambaugh ,  James V. Tarbell

    IPC分类号： B01D3/14 ,  C07D319/12

    CPC分类号： B01D3/146 ,  C07D319/12 ,  Y10S203/20 ,  Y10S203/22

    摘要： A dimeric cyclic ester of an alpha-hydroxycarboxylic acid (lactide) is separated and recovered from a vapor product stream containing the cyclic ester, the corresponding lower-boiling hydroxycarboxylic acid (lactic), higher-boiling oligomeric hydroxycarboxylic acid and water without the use of solvents. More specifically, the vapor stream is condensed to obtain a condensate containing substantially all the cyclic ester, and the condensate is refined by distillation means alone to recover the cyclic ester substantially free of water, the alpha-hydroxycarboxylic acid and the higher-boiling oligomers.

    摘要翻译： 从包含环酯，相应的低沸点羟基羧酸（乳酸），高沸点低聚羟基羧酸和水的蒸气产物流中分离并回收α-羟基羧酸（丙交酯）的二聚环酯，而不使用 溶剂。 更具体地说，蒸气流被冷凝以得到含有基本上全部环状酯的冷凝物，并且通过蒸馏装置单独精制冷凝物以回收基本上不含水，α-羟基羧酸和高沸点低聚物的环状酯。

    Cyclic carbonates and their reactions with amines
    5.
    发明授权
    Cyclic carbonates and their reactions with amines 失效
    环状碳酸酯及其与胺的反应

    公开(公告)号：US6020499A

    公开(公告)日：2000-02-01

    申请号：US92156

    申请日：1998-06-05

    申请人： Neville E. Drysdale ,  Mike Fryd ,  Sape Quashie

    发明人： Neville E. Drysdale ,  Mike Fryd ,  Sape Quashie

    IPC分类号： C07D319/06 ,  C07D321/00

    CPC分类号： C07D319/06

    摘要： Six-membered cyclic carbonates (2-oxo-1,3-dioxanes) in which keto or carbohydrocarbyloxy groups are bound to the 5 position of the ring are disclosed. They react surprising quickly with primary or secondary cyclic amines, and the novel product hydroxyurethanes are useful as reactive diluents.

    摘要翻译： 公开了其中酮或碳环氧基与环的5位结合的六元环状碳酸酯（2-氧代-1,3-二恶烷）。 它们与伯或仲环胺快速反应，新产品羟基氨基甲酸酯可用作反应性稀释剂。

    Polymerization of vinyl ethers
    6.
    发明授权
    Polymerization of vinyl ethers 失效
    乙烯基醚的聚合

    公开(公告)号：US5475069A

    公开(公告)日：1995-12-12

    申请号：US331764

    申请日：1994-10-31

    申请人： Neville E. Drysdale

    发明人： Neville E. Drysdale

    IPC分类号： C08F2/00 ,  C08F16/14

    CPC分类号： C08F16/14

    摘要： Process for the polymerization of selected vinyl ethers catalyzed by yttrium or rare earth metal perfluoroalkylsulfonates. A preferred perfluoroalkylsulfonate anion is triflate (trifluoromethanesulfonate). The resulting polymers are useful as tackifiers in adhesives as well as in other uses (e.g., plasticizers, viscosity modifiers).

    摘要翻译： 由钇或稀土金属全氟烷基磺酸酯催化的所选乙烯基醚的聚合方法。 优选的全氟烷基磺酸根阴离子是三氟甲磺酸酯（三氟甲磺酸酯）。 得到的聚合物可用作粘合剂以及其它用途（如增塑剂，粘度调节剂）中的增粘剂。

    Poly-p-phenylamino carboxylate
    8.
    发明授权
    Poly-p-phenylamino carboxylate 失效
    聚对苯基氨基羧酸酯

    公开(公告)号：US4824995A

    公开(公告)日：1989-04-25

    申请号：US193195

    申请日：1988-05-09

    申请人： Neville E. Drysdale

    发明人： Neville E. Drysdale

    IPC分类号： C07C229/26 ,  C07C229/42 ,  C08G73/02 ,  C07C101/44

    CPC分类号： C08G73/02

    摘要： A poly-p-phenylamino carboxylate having the following structure: ##STR1## wherein n is greater than 1; R is a C.sub.1 to C.sub.6 alkyl group; and R.sub.1 and R.sub.2 are the same or different and are selected from the group: ##STR2##

    摘要翻译： 具有以下结构的聚对苯基氨基羧酸酯：其中n大于1; R是C1-C6烷基; 并且R1和R2相同或不同，并且选自以下组：

    Cyclic carbonates and their reactions with amines
    9.
    发明授权
    Cyclic carbonates and their reactions with amines 失效
    环状碳酸酯及其与胺的反应

    公开(公告)号：US06228979B1

    公开(公告)日：2001-05-08

    申请号：US09459560

    申请日：1999-12-13

    申请人： Neville E. Drysdale ,  Mike Fryd ,  Sapé Quashie

    发明人： Neville E. Drysdale ,  Mike Fryd ,  Sapé Quashie

    IPC分类号： C08G7104

    CPC分类号： C07D319/06

    摘要： Six-membered cyclic carbonates (2-oxo-1,3-ioxanes) in which keto or carbohydrocarbyloxy groups are bound to the 5 position of the ring are disclosed. They react surprising quickly with primary or secondary cyclic amines, and the novel product hydroxyurethanes are usefull as reactive diluents.

    摘要翻译： 公开了其中酮或碳环氧基与环的5位结合的六元环状碳酸酯（2-氧代-1,3-戊二醇）。 它们与伯或仲环胺快速反应，新产品羟基氨基甲酸酯可用作活性稀释剂。