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公开(公告)号：US09714304B2
公开(公告)日：2017-07-25
申请号：US15307114
申请日：2015-04-28
发明人： Paul Nguyen , Jessica Watson , Gilles Arsenault
IPC分类号： C08F4/52 , C08F36/00 , C08F210/12
CPC分类号： C08F210/12 , C08F2/14 , C08F236/08 , C08F236/04 , C08F212/12 , C08F212/08
摘要： A process for producing a copolymer involves contacting at least one isoolefin monomer with at least one multiolefin and/or β-pinene monomer in the presence of at least one Lewis acid and at least one initiator in a diluent. The diluent contains a hydrofluorinated olefin (HFO) comprising a tetrafluorinated propene. Copolymers produced by a process of the present invention have a cyclic oligomer content lower than comparable polymers produced in a butyl rubber slurry process using 1,1,1,2-tetrafluoroethane and/or methyl chloride as a diluent as well as a more favorable ratio of C21/C13. Hydrofluorinated olefins used in the present invention are better diluents for butyl slurry cationic polymerization than saturated hydro fluorocarbons.
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公开(公告)号：US10077326B2
公开(公告)日：2018-09-18
申请号：US15307096
申请日：2015-04-28
IPC分类号： C08F210/12 , C08F2/14
CPC分类号： C08F210/12 , C08F4/52 , C08F2/14 , C08F236/08 , C08F210/14 , C08F2500/25
摘要： A copolymer has high levels of multolefin incorporation. A process for producing the copolymer having high levels of multiolefin incorporation involves contacting at least one isoolefin monomer with at least one multiolefin and/or β-pinene monomer in the presence of at least one Lewis acid and at least one initiator in a diluent. The diluent contains a hydrofluor-Mated olefin (HFO) comprising at least three carbon atoms and at least three fluorine atoms. Hydrofluorinated olefins used in the present invention are better diluents for butyl slurry cationic polymerization than saturated hydro-fluorocarbons.
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公开(公告)号：US11066498B2
公开(公告)日：2021-07-20
申请号：US15307111
申请日：2015-04-28
发明人： Paul Nguyen , Jessica Watson , Gilles Arsenault
IPC分类号： C08F210/12
摘要： A copolymer has low levels of cyclic oligomeric compounds, which are undesirable impurities in certain applications. The cyclic oligomeric compounds are provided in an advantageously low ratio of C21/C13 oligomers. The C13 oligomers are extractable using steam to further reduce the total amount of cyclic oligomers. A process for producing the copolymer having low levels of cyclic oligomers involves contacting at least one isoolefin monomer with at least one multiolefin and/or β-pinene monomer in the presence of at least one Lewis acid and at least one initiator in a diluent. The diluent contains a hydrofluorinated olefin (HFO) comprising at least three carbon atoms and at least three fluorine atoms. Hydrofluorinated olefins used in the present invention are better diluents for butyl slurry cationic polymerization than saturated hydrofluorocarbons.
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公开(公告)号：US10011670B2
公开(公告)日：2018-07-03
申请号：US15307125
申请日：2015-04-30
CPC分类号： C08F210/12 , C08C19/14 , C08F6/003 , C08F8/20 , C08F8/22 , C08F4/005 , C08F236/08 , C08L23/22 , C08F4/52
摘要： The invention relates to an efficient polymerization process and its use to produce novel copolymers with a specific micro structure. In particular, the invention relates to butyl rubbers with novel micro structure, preferably those obtainable by copolymerization of monomer mixtures comprising isobutylene and isoprene in diluents comprising 2,3,3,3 -tetrafluoro-1-propene. In a further aspect the invention relates to halogenated copolymers obtainable from such novel copolymers by halogenation.
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公开(公告)号：US09850331B2
公开(公告)日：2017-12-26
申请号：US15307128
申请日：2015-04-28
IPC分类号： C08F36/00 , C08F210/00 , C08F210/12 , C08F6/10
CPC分类号： C08F210/12 , C08F6/10 , C08F2/14 , C08F4/52 , C08F236/08 , C08F2500/04 , C08F210/10 , C08F210/14 , C08L23/22
摘要： A copolymer has low levels of isoprenoid (short chain branching) structures. A process for producing the copolymer having low isoprenoid content involves contacting at least one isoolefin monomer with at least one multiolefin and/or β-pinene monomer in the presence of at least one Lewis acid and at least one initiator in a diluent. The diluent may contain a hydrofluorinated olefin (HFO) comprising at least three carbon atoms and at least three fluorine atoms. Hydrofluorinated olefins used in the present invention are better diluents for butyl slurry cationic polymerization than saturated hydrofluorocarbons. Blends of saturated hydrofluorocarbons (e.g. 1,1,1,2-tetrafluoroethane) with an inert solvent (e.g. methyl chloride) may also be used as diluents.
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