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    Radial polymers prepared by stabilized free radical polymerization
    6.
    发明授权
    Radial polymers prepared by stabilized free radical polymerization 有权
    通过稳定的自由基聚合制备的径向聚合物

    公开(公告)号：US06369162B1

    公开(公告)日：2002-04-09

    申请号：US09582147

    申请日：2000-06-21

    Applicant: Daniel C. Visger ,  Richard M. Lange

    Inventor： Daniel C. Visger ,  Richard M. Lange

    IPC: C08F28100

    CPC classification number: C08L53/00 ,  C08F293/00 ,  C08F293/005 ,  C10M143/10 ,  C10M145/12 ,  C10M145/14 ,  C10M145/16 ,  C10M149/06 ,  C10M149/08 ,  C10M2205/04 ,  C10M2209/082 ,  C10M2209/084 ,  C10M2209/086 ,  C10M2217/024 ,  C10M2217/026 ,  C10M2217/06

    Abstract: A process for preparing a radial polymer comprising at least 3 polymeric arms and a central core comprising a polymerized di- or polyfunctional monomer, said process comprising the steps, (a) polymerizing at an elevated temperature, a charge comprising at least one free radical-polymerizable monomer to prepare a stabilized active polymer block (A) using a free radical polymerization process, wherein a stable free radical agent is employed during the polymerization, thereby preserving the stabilized active polymerization site at the terminus of the polymer; optionally (b) adding at least one additional free radical-polymerizable monomer, at least one of which is different from the monomers making up the first charge of monomers, to the stabilized active polymer block (A); and further reacting the mixture using a free radical process to effect copolymerization of said monomers, thereby preparing an A-B block copolymer having a stabilized active polymerization site at the terminus of the polymer; then (c) adding at least one coupling agent comprising a polyfunctional monomer and reacting the stabilized active polymers from (a) or (b) with a coupling agent to form a radial polymer. The present invention also relates to polymers, including block copolymers prepared by the above process, additive concentrates for preparing lubricating oil compositions and lubricating oil compositions. In other embodiments, the present invention relates to block copolymers having more than two blocks.

    Abstract translation: 一种制备包含至少3个聚合物臂和包含聚合的二官能或多官能单体的中心核的径向聚合物的方法，所述方法包括以下步骤：（a）在升高的温度下聚合包含至少一种自由基 - 使用自由基聚合方法制备稳定的活性聚合物嵌段（A），其中在聚合过程中使用稳定的自由基试剂，从而保留聚合物末端的稳定的活性聚合位点; 任选地（b）向稳定的活性聚合物嵌段（A）中加入至少一种另外的可自由基聚合的单体，其至少一种不同于构成第一次单体的单体; 并进一步使混合物与自由基反应进行反应，以使所述单体进行共聚反应，从而制备在聚合物末端具有稳定的活性聚合位点的A-B嵌段共聚物; 然后（c）加入至少一种包含多官能单体的偶联剂并使来自（a）或（b）的稳定的活性聚合物与偶联剂反应以形成径向聚合物。本发明还涉及聚合物，包括制备的嵌段共聚物 通过上述方法制备用于制备润滑油组合物和润滑油组合物的添加剂浓缩物。 在其它实施方案中，本发明涉及具有多于两个嵌段的嵌段共聚物。

    Dispersant-viscosity improvers for lubricating oil compositions
    7.
    发明授权
    Dispersant-viscosity improvers for lubricating oil compositions 失效
    用于润滑油组合物的分散剂 - 粘度改进剂

    公开(公告)号：US06294628B1

    公开(公告)日：2001-09-25

    申请号：US09312594

    申请日：1999-05-14

    Applicant: Charles P. Bryant ,  Bryan A. Grisso ,  Robert Cantiani

    Inventor： Charles P. Bryant ,  Bryan A. Grisso ,  Robert Cantiani

    IPC: C08E26510

    CPC classification number: C10M149/10 ,  C08F220/12 ,  C10M145/14 ,  C10M149/04 ,  C10M149/06 ,  C10M149/08 ,  C10M2209/084 ,  C10M2215/04 ,  C10M2215/26 ,  C10M2217/022 ,  C10M2217/023 ,  C10M2217/024 ,  C10M2217/028 ,  C10M2217/046 ,  C10M2217/06 ,  C10M2219/02 ,  C10M2219/046 ,  C10M2223/045 ,  C10N2210/02 ,  C10N2270/02

    Abstract: A polyacrylate ester, and more particularly a polymethacrylate ester based dispersant-viscosity improver for lubricating oil compositions. Specifically, the dispersant viscosity improvers of this invention are nitrogen-containing copolymers comprising units derived from (A) from about 5% to about 75% by weight of alkyl acrylate ester monomers containing from 1 to 11 carbon atoms in the alkyl group; (B) from about 25% to about 95% by weight of alkyl acrylate ester monomers containing from 12 to about 24 carbon atoms in the alkyl group; and (C) from about 0.1% to about 20% by weight of at least one nitrogen containing monomer selected from the group consisting of vinyl substituted nitrogen heterocyclic monomers, N,N-dialkylaminoalkyl acrylate monomers, N,N-dialkylaminoalkyl acrylamide monomers and tertiary-alkyl acrylamides, provided that the total equals 100%. Processes for preparing the compositions, additive concentrates and lubricating oil compositions are described.

    Abstract translation: 聚丙烯酸酯，特别是用于润滑油组合物的聚甲基丙烯酸酯类分散剂 - 粘度改进剂。 具体地说，本发明的分散剂粘度改进剂是含有共聚物的含氮共聚物，其包含衍生自（A）约5％至约75％（重量）在烷基中含有1至11个碳原子的丙烯酸烷基酯单体的单元的单元;（B ）约25％至约95％重量的在烷基中含有12至约24个碳原子的丙烯酸烷基酯单体; 和（C）约0.1重量％至约20重量％的至少一种选自乙烯基取代的氮杂环单体，N，N-二烷基氨基烷基丙烯酸酯单体，N，N-二烷基氨基烷基丙烯酰胺单体和N，N-二烷基氨基烷基丙烯酰胺单体的含氮单体和三 烷基丙烯酰胺，条件是总量等于100％。 描述了制备组合物，添加剂浓缩物和润滑油组合物的方法。

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