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机械工程学会摩擦学分会 固体润滑国家重点实验室 摩擦学学报
Modified block copolymers and process of preparing the same
专利摘要

Using a novel process of one or more combined steps, modified novel block copolymers are prepared by alkylating or hydrogenating a block copolymer precursor containing at least two segments, in which segment A consists of a styrene polymer, either styrene alone or a hydrogenated random butadiene-styrene copolymer and from 1% to about 50% by weight of segment B being an alkylene oxide or sulfide copolymerized with the first segment as an AB or BAB copolymer. These novel copolymers perform as multifunctional additives in industrial organic compositions, both hydrocarbon fluids, such as petroleum-derived, and non-hydrocarbon, or synthetic fluids, providing such utility as detergency, emulsification and viscosity index improvement. These copolymers have molecular weights in the range of from about 1,000 to 500,000. The copolymers are particularly useful in lubricating oils, greases and fuels, especially cross-graded lubricants, crude oils, diesel oils, gasoline and fuel oils. Copolymers capped with metal diisocyanate have excellent thermal and oxidative stability. ......

基本信息
  • 专利类型:

    发明专利

  • 申请/专利号:

    US05/696104

  • 申请日期:

    1976-06-14

  • 专利申请人:

    美孚石油公司

  • 分类号:

    ["C08G65/00","C08G18/00","C08G65/08","C08G75/08","C08G75/00","C08G18/62","F02B3/06","F02B3/00","C08L9/06","C08L43/04","C10M1/40"]

  • 发明/设计人:

    NNADI, JOHN C. ， HEILWEIL, ISRAEL J.

  • 权利要求: 1. A novel copolymer having improved solubility in organic fluids prepared by the step comprising alkylating an AB or BAB block copolymer precursor in which block A is a styrene-containing polymer and block B is an alkylene oxide or alkylene sulfide polymer.2. The novel copolymer of claim 1 wherein block A of the copolymer precursor is a homopolymer of styrene.3. The novel copolymer of claim 1 wherein block A of the copolymer precursor is a hydrogenated diene-styrene copolymer.4. The novel copolymer of claim 3 wherein the diene is butadiene.5. The novel copolymer of claim 1 wherein block B is an alkylene oxide copolymer.6. The novel copolymer of claim 5 wherein the alkylene oxide is ethylene oxide.7. The novel copolymer of claim 1 wherein the alkylation step is carried out by reacting the copolymer precursor with an olefin, an alkyl halide or an alcohol having from 4 to 30 carbon atoms.8. The novel copolymer of claim 7 wherein the olefin is isobutylene.9. A process for preparing the novel copolymer of claim 1 by mixing the copolymer precursor with as alkylating agent an olefin, alkyl halide or alcohol having from 4 to 30 carbon atoms in a ratio of from 0.25 to 10 moles of said alkylating agent per mole of styrene used in the copolymer precursor in the presence of a Friedel-Crafts catalyst.10. A process of claim 9 wherein the alkylating agent is isobutylene.11. A process for preparing the novel copolymer of claim 1 by hydrogenating the copolymer precursor at a pressure of from 800 to 3000 psi.
原文

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