Common solvent process for producing high molecular weight halobutyl rubber
    4.
    发明授权
    Common solvent process for producing high molecular weight halobutyl rubber 有权
    用于生产高分子量卤代丁基橡胶的常用溶剂方法

    公开(公告)号:US09309333B2

    公开(公告)日:2016-04-12

    申请号:US12999669

    申请日:2009-07-09

    摘要: An integrated process for the solution polymerization and subsequent halogenation of butyl rubber in a common medium is disclosed. The process comprises providing a solution polymerization reactor containing a C6 medium mixed with a monomer mixture comprising at least an isoolefin monomer and a multiolefin monomer in a mass ratio of monomer mixture to medium of from 61:39 to 80:20. Once polymerized, residual unreacted monomer mixture is separated from the rubber solution using a distillation process. The residual monomers may then be purified and recycled back into the reactor. The separated rubber solution is then halogenated. The process obviates the need for separating the rubber from the medium following polymerization, then re-dissolving it in another solvent for halogenation, thereby saving energy cost. The process optionally employs heat exchangers for the reactor feed streams to further reduce energy consumption.

    摘要翻译: 公开了一种用于普通介质中的丁基橡胶的溶液聚合和随后卤化的整合方法。 该方法包括提供一种溶液聚合反应器,其包含与包含至少异构烯烃单体和多烯烃单体的单体混合物的C6介质,其中单体混合物的质量比为61:39至80:20。 一旦聚合,残留的未反应单体混合物就使用蒸馏方法从橡胶溶液中分离出来。 然后可以将残留的单体纯化并循环回到反应器中。 然后将分离的橡胶溶液卤化。 该方法消除了在聚合之后将橡胶与介质分离的需要,然后将其再溶解在另一溶剂中用于卤化,由此节省了能量成本。 该方法任选地使用反应器进料流的热交换器来进一步降低能量消耗。

    Method for coating carrier particles for use in electrostatic developers
    8.
    发明授权
    Method for coating carrier particles for use in electrostatic developers 有权
    用于涂覆用于静电显影剂的载体颗粒的方法

    公开(公告)号:US5888692A

    公开(公告)日:1999-03-30

    申请号:US135567

    申请日:1998-08-18

    IPC分类号: G03G9/087 B01J2/00 G03G9/113

    CPC分类号: G03G9/1131 G03G9/1136

    摘要: A method for coating carrier particles for use in electrostatic developers is provided comprising the steps of:bringing the carrier particles to be coated in a vessel equipped with means for agitating the carrier particles, so that the carrier articles occupy less than 85% by volume of the vessel, and the agitation of the carrier particles is described by a Froude number between 0.2 and 20,adding a solution containing between 6 and 60% by weight with respect to the total volume of the solution of chemical compounds for coating the carrier particles in a solvent with a boiling point of A.degree. C. to the vessel at such a rate that, at any time, the solvent is present in an amount lower than 1.25 10.sup.-4 ml per cm.sup.2 of surface of the carrier particles to be coated,keeping the carrier particles in the vessel at a temperature of at most (A+10).degree. C., andcontinuously evacuating the solvent.

    摘要翻译: 提供了一种用于涂覆用于静电显影剂的载体颗粒的方法,包括以下步骤:将载体颗粒涂布在装有用于搅拌载体颗粒的装置的容器中,使得载体物品占85%(体积) 容器和载体颗粒的搅拌由弗劳德数介于0.2和20之间,相对于用于将载体颗粒涂覆的化合物溶液的总体积加入含有6至60重量%的溶液 沸点为A℃的溶剂以使得在任何时候溶剂的存在量低于每平方厘米待涂覆载体颗粒表面的1.25×10-4毫升, 将载体颗粒保持在至多(A + 10)℃的温度下,并持续抽空溶剂。

    COMMON SOLVENT PROCESS FOR PRODUCING HIGH MOLECULAR WEIGHT HALOBUTYL RUBBER
    9.
    发明申请
    COMMON SOLVENT PROCESS FOR PRODUCING HIGH MOLECULAR WEIGHT HALOBUTYL RUBBER 有权
    用于生产高分子重量橡胶橡胶的常用方法

    公开(公告)号:US20110257342A1

    公开(公告)日:2011-10-20

    申请号:US12999669

    申请日:2009-07-09

    IPC分类号: C08L9/00

    摘要: An integrated process for the solution polymerization and subsequent halogenation of butyl rubber in a common medium is disclosed. The process comprises providing a solution polymerization reactor containing a C6 medium mixed with a monomer mixture comprising at least an isoolefin monomer and a multiolefin monomer in a mass ratio of monomer mixture to medium of from 61:39 to 80:20. Once polymerized, residual unreacted monomer mixture is separated from the rubber solution using a distillation process. The residual monomers may then be purified and recycled back into the reactor. The separated rubber solution is then halogenated. The process obviates the need for separating the rubber from the medium following polymerization, then re-dissolving it in another solvent for halogenation, thereby saving energy cost. The process optionally employs heat exchangers for the reactor feed streams to further reduce energy consumption.

    摘要翻译: 公开了一种用于普通介质中的丁基橡胶的溶液聚合和随后卤化的整合方法。 该方法包括提供一种溶液聚合反应器,其包含与包含至少异构烯烃单体和多烯烃单体的单体混合物的C6介质,其中单体混合物的质量比为61:39至80:20。 一旦聚合,残留的未反应单体混合物就使用蒸馏方法从橡胶溶液中分离出来。 然后可以将残留的单体纯化并循环回到反应器中。 然后将分离的橡胶溶液卤化。 该方法消除了在聚合之后将橡胶与介质分离的需要,然后将其再溶解在另一溶剂中用于卤化,由此节省了能量成本。 该方法任选地使用反应器进料流的热交换器来进一步降低能量消耗。