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11 条记录 (耗时 0.034 秒)

    Isoprene recovery in the butyl rubber process
    6.
    发明授权
    Isoprene recovery in the butyl rubber process 失效
    异戊二烯在丁基橡胶工艺中回收

    公开(公告)号：US5035794A

    公开(公告)日：1991-07-30

    申请号：US419914

    申请日：1989-10-11

    申请人： Harvey E. Atwood

    发明人： Harvey E. Atwood

    IPC分类号： C07C7/12 ,  C08J11/02

    CPC分类号： C08J11/02 ,  C07C7/12

    摘要： A method for removing a tertiary halide from an olefin hydrocarbon stream which comprises contacting the hydrocarbon stream with activated alumina at a temperature of about -40.degree. to about 120.degree. C.

    摘要翻译： 一种从烯烃烃流中除去叔卤化物的方法，该方法包括使烃流与活性氧化铝在约-40℃至约120℃的温度下接触。

    Solid viscosity index improvers which provide excellent low temperature viscosity
    7.
    发明授权
    Solid viscosity index improvers which provide excellent low temperature viscosity 失效
    固体粘度指数改进剂，提供优异的低温粘度

    公开(公告)号：US5278252A

    公开(公告)日：1994-01-11

    申请号：US34045

    申请日：1993-03-22

    申请人： Robert B. Rhodes ,  Harvey E. Atwood

    发明人： Robert B. Rhodes ,  Harvey E. Atwood

    IPC分类号： C10M143/10 ,  C08F8/04 ,  C08F297/04 ,  C10M143/12 ,  C10N20/04 ,  C10N30/02 ,  C10N60/02 ,  C10N70/00

    CPC分类号： C10M143/12 ,  C08F297/046 ,  C08F8/04 ,  C10M2205/06

    摘要： A solid, cyclone-finishable polymer which does not exhibit cold flow and provides an unexpected balance of viscosity improving properties for oil compositions is produced by hydrogenating a copolymer comprising a homopolymer block of isoprene connected to a copolymer block of isoprene and a monoalkenyl aromatic hydrocarbon. The amount of the monoalkenyl aromatic hydrocarbon is sufficient to allow cyclone finishing although sufficiently distributed to provide oil compositions having good low temperature viscosity. Prior to hydrogenation, the copolymers have a number average molecular weight between 125,000 and 275,000, preferably 150,000 to 240,000, and a total monoalkenyl aromatic content between 10 and 2 percent by weight, preferably between 7 and 3 percent. The copolymer is hydrogenated to substantially saturate the isoprene and to reduce the size of monoalkenyl aromatic segments in the copolymer block.

    摘要翻译： 通过氢化包含与异戊二烯的共聚物嵌段和单链烯基芳族烃连接的异戊二烯的均聚物嵌段的共聚物来制备不显示冷流并且提供油组合物的改进粘度改进性能的意想不到的平衡的固体，旋风可完成的聚合物。 单链烯基芳族烃的量足以使旋风分离完成，尽管足够分散以提供具有良好低温粘度的油组合物。 在氢化之前，共聚物的数均分子量为125,000至275,000，优选为150,000至240,000，总单烯基芳族含量为10至2重量％，优选为7至3％。 共聚物被氢化以基本上使异戊二烯饱和并且减小共聚物嵌段中的单链烯基芳族链段的尺寸。

    Solid viscosity index improvers which provide excellant low temperature viscosity
    8.
    发明授权
    Solid viscosity index improvers which provide excellant low temperature viscosity 失效
    固体粘度指数改进提供低温粘度

    公开(公告)号：US5223579A

    公开(公告)日：1993-06-29

    申请号：US646024

    申请日：1991-01-28

    申请人： Robert B. Rhodes ,  Harvey E. Atwood

    发明人： Robert B. Rhodes ,  Harvey E. Atwood

    IPC分类号： C10M143/10 ,  C08F8/04 ,  C08F297/04 ,  C10M143/12 ,  C10N20/04 ,  C10N30/02 ,  C10N60/02 ,  C10N70/00

    CPC分类号： C10M143/12 ,  C08F297/046 ,  C08F8/04 ,  C10M2205/06

    摘要： A solid, cyclone-finishable polymer which does not exhibit cold flow and provides an unexpected balance of viscosity improving properties for oil compositions is produced by hydrogenating a copolymer comprising a homopolymer block of isoprene connected to a copolymer block of isoprene and a monoalkenyl aromatic hydrocarbon. The amount of the monoalkenyl aromatic hydrocarbon is sufficient to allow cyclone finishing although sufficiently distributed to provide oil compositions having good low temperature viscosity. Prior to hydrogenation, the copolymers have a number average molecular weight between 125,000 and 275,000, preferably 150,000 to 240,000, and a total monoalkenyl aromatic content between 10 and 2 percent by weight, preferably between 7 and 3 percent. The copolymer is hydrogenated to substantially saturate the isoprene and to reduce the size of monoalkenyl aromatic segments in the copolymer block.

    Method for preparing asymmetric radial polymers
    9.
    发明授权
    Method for preparing asymmetric radial polymers 失效
    制备不对称辐射聚合物的方法

    公开(公告)号：US5212249A

    公开(公告)日：1993-05-18

    申请号：US783441

    申请日：1991-10-28

    申请人： Gary W. Richie, deceased ,  Raymond C. Tsiang ,  Ronald J. Hoxmeier ,  Arthur R. Bean ,  Harvey E. Atwood

    发明人： Gary W. Richie, deceased ,  Raymond C. Tsiang ,  Ronald J. Hoxmeier ,  Arthur R. Bean ,  Harvey E. Atwood

    IPC分类号： C08F8/00 ,  C08G81/02 ,  C08J3/24

    CPC分类号： C08G81/022

    摘要： A method for preparing asymmetric radial polymers wherein the different polymeric arms are contacted sequentially with a nonpolymerizable coupling agent. Contacting of the final step in the process, which frequently but not necessarily always will be the second step in the process, will be carried out in the presence of a polar compound suitable for increasing the amount of vinyl content in a conjugated diolefin polymer during polymerization thereof. The method used narrows the relative arm distribution of the several asymmetric radial polymers produced and significantly increases the amount of total product having the desired ratio of polymeric arms and accomplishes this objective in relatively short reaction time. Any nonpolymerizable coupling agent known in the prior art to be useful in the production of asymmetric radial polymers may be used in the method of this invention but nonpolymerizable coupling agents having from 3 to about 12 functional groups are most effective and nonpolymerizable coupling agents having 2 or 3 functional groups are most preferred. Useful polar compounds are, generally, selected from the group consisting of ethers, tertiary amines, pyridine and pyrolidene compounds.