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    Solid viscosity index improvers which provide excellent low temperature viscosity
    1.
    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
    2.
    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.

    Dispersant viscosity index improvers
    4.
    发明授权
    Dispersant viscosity index improvers 失效
    分散剂粘度指数改进剂

    公开(公告)号：US5360564A

    公开(公告)日：1994-11-01

    申请号：US100656

    申请日：1993-07-30

    申请人： Robert J. Sutherland ,  Robert B. Rhodes

    发明人： Robert J. Sutherland ,  Robert B. Rhodes

    IPC分类号： C08F8/32 ,  C10M149/06 ,  F02F7/00 ,  C10M149/02

    CPC分类号： C10M149/06 ,  C08F8/32 ,  C10M2205/04 ,  C10M2205/06 ,  C10M2209/08 ,  C10M2215/04 ,  C10M2215/086 ,  C10M2215/26 ,  C10M2215/28 ,  C10M2217/024 ,  C10M2217/046 ,  C10M2217/06 ,  C10N2240/10 ,  C10N2240/101 ,  C10N2240/104 ,  C10N2240/106 ,  F02F7/006

    摘要： An engine oil formulation comprising of a pour point depressant, a dispersant inhibitor package containing a reduced amount of ashless dispersant, a synthetic or mineral based oil or mixtures thereof, and a modified hydrogenated star polymer of a conjugated diolefin and a modified hydrogenated copolymer of conjugated diolefins and monoalkenyl arenes is disclosed. The engine oil has and exhibits improved dispersancy and rheological properties which is attributable to the presence therein of the modified hydrogenated star polymer of a conjugated diolefin and a modified hydrogenated copolymer of conjugated diolefins and monoalkenyl arenes. A process of producing the inventive engine oil composition is also disclosed.

    摘要翻译： 一种发动机油配方，其包含倾点降低剂，含有减少量的无灰分散剂的分散剂抑制剂包，合成或矿物基油或其混合物，以及共轭二烯烃和共轭二烯烃的改性氢化共聚物的改性氢化星形聚合物 公开了二烯烃和单烯基芳烃。 发动机油具有和表现出改善的分散性和流变性能，这归因于其中存在共轭二烯烃的改性氢化星形聚合物和共轭二烯烃和单烯基芳烃的改性氢化共聚物。 还公开了生产本发明的机油组合物的方法。

    Viscosity index improver and composition containing same
    5.
    发明授权
    Viscosity index improver and composition containing same 失效
    粘度指数改进剂和含有它的组合物

    公开(公告)号：US4877836A

    公开(公告)日：1989-10-31

    申请号：US198542

    申请日：1988-05-24

    申请人： Robert B. Rhodes

    发明人： Robert B. Rhodes

    IPC分类号： C10M143/00 ,  C08L53/00 ,  C08L53/02 ,  C10L1/16 ,  C10M107/14 ,  C10M143/12 ,  C10N30/02 ,  C10N40/25 ,  C10N60/02

    CPC分类号： C10M143/12 ,  C08L53/02 ,  C10M2205/04 ,  C10M2205/06 ,  C10N2240/02 ,  C10N2240/04 ,  C10N2240/042 ,  C10N2240/044 ,  C10N2240/046 ,  C10N2240/08 ,  C10N2240/401 ,  C10N2250/10 ,  C10N2270/02

    摘要： A polymeric blend particularly useful as a VI improver, which polymeric blend comprises a selectively hydrogenated asymmetric radial polymer comprising a plurality of polymeric arms containing hydrogenated conjugated diolefin monomer units and at least one block copolymer arm comprising a single polymeric block containing predominantly monoalkenyl aromatic hydrocarbon monomer units and a single polymeric block containing predominantly hydrogenated conjugated diolefin monomer units and a selectively hydrogenated linear diblock copolymer containing a single polymeric block containing principally monoalkenyl aromatic hydrocarbon monomer units and a single polymeric block containing predominantly hydrogenated conjugated diolefin monomer units. Both polymers in the blend will be selectively hydrogenated so as to convert (saturate) at least 95% of the ethylenic unsaturation initially contained therein. When used as a VI improver, the polymeric blend unexpectedly improves the thickening efficiency over and above the thickening efficiency that would be expected from a consideration of the individual contribution made by each of the polymers separately. The monoalkenyl aromatic hydrocarbon polymer blocks in both polymers is preferably styrene and the conjugated diolefin in both polymers is preferably isoprene. Preferably, both polymers are selectively hydrogenated so as to convert (saturate) at least 99% of the ethylenic unsaturation initially contained therein.

    Oil compositions containing modified star polymers
    6.
    发明授权
    Oil compositions containing modified star polymers 失效
    含有改性星形聚合物的油组合物

    公开(公告)号：US5035820A

    公开(公告)日：1991-07-30

    申请号：US523517

    申请日：1990-05-15

    申请人： Robert B. Rhodes ,  Rudolf J. A. Eckert

    发明人： Robert B. Rhodes ,  Rudolf J. A. Eckert

    IPC分类号： C10M149/10

    CPC分类号： C10M149/10 ,  C10M2205/04 ,  C10M2205/06 ,  C10M2217/028 ,  C10M2217/06 ,  C10N2240/10 ,  C10N2240/101 ,  C10N2240/104 ,  C10N2240/106 ,  C10N2270/02

    摘要： Lubricating oil compositions which contain hydrogenated diene star polymers grafted with N-vinylimidazole exhibit improved engine performance when prepared by grafting the polymer in an oil mixture containing at least 6% by weight of the star polymer. The grafting is accomplished by contacting the polymer with from about 3.0 to about 5.5 wt % N-vinylimidazole when N-vinylimidazole is the sole reactant and from about 1.0 to about 5.0 wt % N-vinylimidazole when N-vinylimidazole is used in combination with N-vinylpyrrolidone.

    摘要翻译： 当通过将聚合物接枝在含有至少6重量％的星形聚合物的油混合物中制备时，含有用N-乙烯基咪唑接枝的氢化二烯星形聚合物的润滑油组合物表现出改善的发动机性能。 当N-乙烯基咪唑是唯一的反应物时，通过使聚合物与约3.0至约5.5重量％的N-乙烯基咪唑接触，并且当将N-乙烯基咪唑与N组合使用时，约1.0至约5.0重量％的N-乙烯基咪唑 乙烯基吡咯烷酮。

    Polymeric viscosity index additive and oil composition comprising the same
    7.
    发明授权
    Polymeric viscosity index additive and oil composition comprising the same 失效
    聚合物粘度指数添加剂和包含它的油组合物

    公开(公告)号：US4900875A

    公开(公告)日：1990-02-13

    申请号：US299387

    申请日：1989-01-23

    申请人： Robert B. Rhodes ,  Arthur R. Bean

    发明人： Robert B. Rhodes ,  Arthur R. Bean

    IPC分类号： C08F297/04 ,  C10L1/16 ,  C10M143/12

    CPC分类号： C08F297/046 ,  C10L1/1666 ,  C10M143/12 ,  C10M2205/04 ,  C10M2205/06

    摘要： A star-shaped polymer useful as a polymeric VI improver comprising at least one arm which is a block copolymer containing a cunjugated diolefin block and a monoalkenyl aromatic hydrocarbon block and a plurality of arms which are either a homopolymer of a conjugated diolefin or a copolymer of two or more conjugated diolefin or a copolymer of two or more conjugated diolefins. Oil compositions comprising star-shaped VI improvers of this type exhibit relativelylow HTHSR viscosities, and hence, improved fuel efficients when used in automotive applications. Oil compositions comprising star-shaped VI improvers of this type also exhibit improved low temperature pumpability.

    摘要翻译： 可用作聚合物VI改进剂的星形聚合物，其包含至少一个臂，其是含有连接的二烯烃嵌段和单链烯基芳族烃嵌段的嵌段共聚物和多个臂，其是共轭二烯烃的均聚物或共轭二烯烃的共聚物 两种或多种共轭二烯烃或两种或多种共轭二烯烃的共聚物。 包含这种类型的星形VI改进剂的油组合物显示相对较低的HTHSR粘度，因此在汽车应用中使用时提高了燃料效率。 包含这种类型的星形VI改进剂的油组合物还表现出改善的低温可泵性。

    Asymmetrical radial polymer and composition of matter comprising the same
    9.
    发明授权
    Asymmetrical radial polymer and composition of matter comprising the same 失效
    不对称的径向聚合物和包含它的物质的组成

    公开(公告)号：US5302667A

    公开(公告)日：1994-04-12

    申请号：US130321

    申请日：1993-10-01

    申请人： Robert B. Rhodes ,  Arthur R. Bean

    发明人： Robert B. Rhodes ,  Arthur R. Bean

    IPC分类号： C08F8/04 ,  C10L1/16 ,  C10L1/195 ,  C10M143/12

    CPC分类号： C10M143/12 ,  C08F8/04 ,  C10L1/1658 ,  C10L1/1666 ,  C10L1/1955 ,  C10M2205/04 ,  C10M2205/06 ,  C10M2205/20

    摘要： An improved VI improver and a fluid composition comprising the VI improver. The VI improver is an asymmetric radial polymer comprising a plurality of arms having at least two distinctly different peak molecular weights, which arms are chemically the same. The weight ratio of a longest set of arms and a first set of shorter arms will vary within the range from about 1.2:1 to about 8.0:1. If more than one set of shorter arms is used the ratio of adjacent arms molecular weights will vary within the same range. While the arm might be essentially any polymer, polymers of conjugated diolefins and copolymers of at least one monoalkenyl aromatic hydrocarbon and at least one conjugated diolefin are preferred. Conjugated diolefin homopolymers are preferred and polyisoprene is most preferred.

    摘要翻译： 改进的VI改进剂和包含VI改进剂的流体组合物。 VI改进剂是包含具有至少两个明显不同的峰分子量的多个臂的不对称的径向聚合物，该臂在化学上是相同的。 最长组的臂和第一组短臂的重量比将在约1.2:1至约8.0:1的范围内变化。 如果使用多组短臂，相邻臂分子量的比例将在相同的范围内变化。 尽管臂基本上可以是任何聚合物，但优选共轭二烯烃的聚合物和至少一种单链烯基芳族烃和至少一种共轭二烯烃的共聚物。 优选共轭二烯烃均聚物，最优选聚异戊二烯。