Diluent for the production of butyl rubber

    公开(公告)号:US10556977B2

    公开(公告)日:2020-02-11

    申请号:US15307103

    申请日:2015-04-30

    IPC分类号: C08F210/12 C08C19/14

    摘要: Methods are provided to efficiently produce butyl rubber via a slurry polymerization process. The process comprises providing at least two monomers, wherein at least one monomer is an isoolefin and at least one monomer is a multiolefin. The monomers are combined with an initiator and an organic diluent comprising 40-60 volume % of methyl chloride and 40-60 volume % of 1,1,1, 2-tetrafluoroethane and polymerized.

    INITIATOR SYSTEM FOR CATIONIC POLYMERIZATION OF OLEFINS

    公开(公告)号:US20200010644A1

    公开(公告)日:2020-01-09

    申请号:US16470046

    申请日:2017-12-14

    摘要: A BrønstedLowry acid initiator system for cationic polymerization of an ethylenically unsaturated monomer involves an initiator having a structure of Formula (I) in an anhydrous polymerization medium (I) where: M is tantalum (Ta), vanadium (V) or niobium (Ni); each R1 is independently H, OR6, F, Cl, Br, I or alkyl, where R6 is H or alkyl; R2, R3, R4 and R5 are independently H, F, Cl Br, I, alkyl or aryl, or two or more of R2, R3, R4 and R5 on a same benzene ring form a bicyclic, tricyclic or tetracyclic moiety with the benzene ring, with the proviso that all of R2, R3, R4 and R5 on the same benzene ring are not H; L is absent or a molecule that coordinates to H+; and, x is 0 when L is absent, or x is 0.5 or more when L is present.

    MODIFIED ASPHALT COMPOSITION
    3.
    发明申请

    公开(公告)号:US20220073429A1

    公开(公告)日:2022-03-10

    申请号:US17416674

    申请日:2019-12-19

    摘要: A modified asphalt composition contains a bituminous component, a copolymeric thermoplastic elastomer (TPE), a high-cis homopolymeric polybutadiene rubber (BR) and a cross-linking agent. The modified asphalt composition exhibits improved low temperature flexibility (crack resistance), improved resistance to rutting (deformation) and/or improved storage stability.

    MULTI-MODAL POLYISOOLEFIN COMPOSITIONS AND PROCESSES THEREFOR

    公开(公告)号:US20200048447A1

    公开(公告)日:2020-02-13

    申请号:US16336731

    申请日:2017-09-28

    IPC分类号: C08L23/28 C08L23/22 B60C1/00

    摘要: A polyisoolefin-based polymer composition having a multimodal molecular weight distribution is described, which can be prepared by the late addition of a chain transfer agent to the polymerization process. The polymer composition has a low molecular weight fraction having a peak molecular weight (Mp) of less than about 100,000 g/mol and a high molecular weight fraction having a peak molecular weight (Mp) of greater than about 250,000 g/mol, the low molecular weight fraction present in the composition in an amount less than the high molecular weight fraction. Cured articles produced from the polyisoolefin-based polymer composition exhibit improved processability while maintaining physical properties.

    PROCESS FOR THE PRODUCTION OF MODIFIED BUTYL RUBBER
    9.
    发明申请
    PROCESS FOR THE PRODUCTION OF MODIFIED BUTYL RUBBER 审中-公开
    生产改性丁二烯橡胶的方法

    公开(公告)号:US20160362505A1

    公开(公告)日:2016-12-15

    申请号:US15121407

    申请日:2015-02-27

    摘要: There is provided a process for producing an ionomer comprising the steps of (a) admixing in a mixer a halogenated copolymer with at least one nitrogen and/or phosphorus based nucleophile and (b) extruding the mixture from step (a). The process takes place with high conversion and the resulting ionomer contains a low amount of residual nucleophile and has a low yellowness index.

    摘要翻译: 提供了一种生产离聚物的方法,包括以下步骤:(a)在混合器中将卤化共聚物与至少一种氮和/或磷基亲核试剂混合,和(b)挤出步骤(a)的混合物。 该方法以高转化率进行,所得到的离聚物含有少量残留的亲核试剂并具有低黄度指数。

    BUTYL RUBBER COMPOUNDS COMPRISING A MIXED MODIFIER SYSTEM
    10.
    发明申请
    BUTYL RUBBER COMPOUNDS COMPRISING A MIXED MODIFIER SYSTEM 审中-公开
    包含混合改性剂体系的丁基橡胶化合物

    公开(公告)号:US20160222201A1

    公开(公告)日:2016-08-04

    申请号:US15094005

    申请日:2016-04-08

    IPC分类号: C08L23/28

    摘要: Rubber compounds containing a halobutyl elastomer, at least one additional elastomer, a mineral filler and at least a three component mixed modifier system comprising a silane compound, a phosphine compound and an additive containing at least one hydroxyl group and a functional group containing a basic amine. A process for preparing the compounds is also disclosed. The compounds are particularly useful in tire treads and exhibit improved processability, traction, rolling resistance and wear properties.

    摘要翻译: 包含卤代丁基弹性体,至少一种另外的弹性体,矿物填料和至少三组分混合改性剂体系的橡胶化合物,其包含硅烷化合物,膦化合物和含有至少一个羟基的添加剂和含有碱性胺的官能团 。 还公开了一种制备该化合物的方法。 这些化合物在轮胎胎面中特别有用,并表现出改善的加工性,牵引力,滚动阻力和磨损性能。