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公开(公告)号：US20230331882A1
公开(公告)日：2023-10-19
申请号：US18044369
申请日：2021-09-09
发明人： Jan Van Egmond
IPC分类号： C08F110/06
CPC分类号： C08F110/06
摘要： Olefin polymers are produced having an ultra-high melt flow rate. The olefin polymers can be used to produce meltblown fibers and meltblown webs, which can then be incorporated into protective apparel. The polyolefin polymer is produced using a Ziegler-Natta catalyst and without having to use peroxides in order to obtain the high melt flow rate.
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公开(公告)号：US11578146B2
公开(公告)日：2023-02-14
申请号：US17381355
申请日：2021-07-21
摘要： A process comprising polymerizing olefin monomers and optionally comonomers in a first reactor vessel, thereby forming a raw product stream comprising polymerized solids, unreacted monomer and optionally comonomer, the polymerized solids comprising olefin polymer, volatile organic compounds (VOC) and catalyst system. Then the polymerized solids are contacted with a catalyst poison selected from carbon monoxide, carbon dioxide, oxygen, water, alcohols, amines, or mixtures thereof, thereby forming a passivated stream. The passivated stream is maintained in an agitated state within a second reactor. The passivated stream within the second reactor is then contacted with a circulating gas comprising unreacted monomer for a residence time, thereby reducing the concentration of VOC in the polymerized solids by at least 10 wt % compared to the level before entering the second reactor, thereby forming a purified olefin polymer solids stream.
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公开(公告)号：US20220169843A1
公开(公告)日：2022-06-02
申请号：US17594140
申请日：2020-04-03
IPC分类号： C08L23/10
摘要： Polypropylene polymer compositions are disclosed that can be formulated to have excellent clarity properties in conjunction with excellent impact resistance properties at subzero temperatures. The polypropylene polymer compositions are heterophasic compositions containing a first phase polymer combined with a second phase polymer. The first phase polymer is a polypropylene and alpha-olefin copolymer while the second phase polymer is also a polypropylene and alpha-olefin random copolymer. The second phase polymer contains relatively high amounts of ethylene. The increased amounts of ethylene in the second phase polymer were found to dramatically improve impact resistance at subzero temperatures.
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公开(公告)号：US20220144975A1
公开(公告)日：2022-05-12
申请号：US17593223
申请日：2020-03-13
摘要： Olefin polymers are produced having a relatively high bulk density and a dramatically reduced amount of fines. The polymers are produced using a catalyst system containing a selectivity control agent. In one embodiment, the selectivity control agent is diisobutyldimethoxysilane.
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公开(公告)号：US20220002528A1
公开(公告)日：2022-01-06
申请号：US17285708
申请日：2019-10-23
发明人： Jose Manu REGO , Michelle Ni PAINE , Zhiru MA
IPC分类号： C08L23/16 , B29C48/09 , B29C48/00 , C08K5/092 , C08K5/098 , C08K5/1575 , C08K5/20 , C08K5/42 , C08K5/521
摘要： Polypropylene polymer compositions are disclosed that can be used to produce different types of molded articles, such as extruded piping structures. The polypropylene polymer composition contains a polypropylene random copolymer in combination with a property enhancing agent. The property enhancing agent is incorporated into the polymer composition so that the composition has relatively high impact resistance properties in combination with a relatively high flexural modulus.
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公开(公告)号：US20210355250A1
公开(公告)日：2021-11-18
申请号：US17381355
申请日：2021-07-21
摘要： A process comprising polymerizing olefin monomers and optionally comonomers in a first reactor vessel, thereby forming a raw product stream comprising polymerized solids, unreacted monomer and optionally comonomer, the polymerized solids comprising olefin polymer, volatile organic compounds (VOC) and catalyst system. Then the polymerized solids are contacted with a catalyst poison selected from carbon monoxide, carbon dioxide, oxygen, water, alcohols, amines, or mixtures thereof, thereby forming a passivated stream. The passivated stream is maintained in an agitated state within a second reactor. The passivated stream within the second reactor is then contacted with a circulating gas comprising unreacted monomer for a residence time, thereby reducing the concentration of VOC in the polymerized solids by at least 10 wt % compared to the level before entering the second reactor, thereby forming a purified olefin polymer solids stream.
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公开(公告)号：US20200369798A1
公开(公告)日：2020-11-26
申请号：US16966348
申请日：2019-02-01
发明人： Amaia Montoya-Goni , John Kaarto , Michelle Ni Paine , Jose Manuel Rego , Feng Gu , Demetrius Michos , James Neil Pryor
IPC分类号： C08F10/06 , C08K3/34 , C08J5/18 , C09D123/12 , C09D123/14 , C09D7/61 , C09D7/40 , C09J123/12 , C09J123/14 , C09J11/04 , C23F11/173
摘要： The present invention provides polymer compositions having improved corrosivity, color stability and clarity. Also disclosed is a process of preparing the polymers. The process may comprise incorporating into the polymer an acid neutralizing amount of an amorphous aluminum silicate. The amorphous aluminum silicate may be present in the polymer in an amount such that the polymer composition having a Corrosivity Index of less than 6. A refractive index of the amorphous aluminum silicate may be the same or substantially the same as a refractive index of the polymer.
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公开(公告)号：US10660856B2
公开(公告)日：2020-05-26
申请号：US14764363
申请日：2014-01-30
摘要： Compositions containing a biologically active ingredient and an inorganic oxide material are disclosed. Methods of making and using compositions containing a biologically active ingredient and an inorganic oxide material are also disclosed. The present invention relates to compositions comprising inorganic oxide porous material containing a biologically active ingredient in liquid form, methods of making such compositions, and methods of using them.
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公开(公告)号：US20200023339A1
公开(公告)日：2020-01-23
申请号：US15770823
申请日：2016-10-25
发明人： Steve R Schmidt , Cristian Libanati
IPC分类号： B01J21/06 , B01J23/89 , B01J23/883 , B01J23/885 , B01J23/887 , B01J35/10 , B01J37/00 , B01J37/02 , B01J37/20 , B01J37/08 , B01J35/00 , C10G3/00
摘要： A process for preparing a catalyst comprises coating substantial internal surfaces of porous inorganic powders with titanium oxide to form titanium oxide-coated inorganic powders. After the coating, an extrudate comprising the titanium oxide-coated inorganic powders is formed and calcined to form a catalyst support. Then, the catalyst support is impregnated with a solution containing one or more salts of metal selected from the group consisting of molybdenum, cobalt, and nickel.
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公开(公告)号：US20190247818A1
公开(公告)日：2019-08-15
申请号：US16387093
申请日：2019-04-17
发明人： Linfeng Chen
IPC分类号： B01J8/18 , C08F10/06 , C08F110/06 , C08F10/02
CPC分类号： B01J8/1809 , B01J8/1872 , B01J31/0201 , B01J31/0212 , B01J31/0272 , B01J31/128 , B01J31/143 , B01J31/2213 , B01J31/2226 , C08F10/02 , C08F10/06 , C08F110/06 , C08F210/06 , C08F2400/02 , C08F2/40 , C08F2/34 , C08F2/00 , C08F4/6465 , C08F4/6494 , C08F4/651 , C08F2500/12 , C08F2500/18 , C08F2500/24 , C08F210/16
摘要： The present disclosure provides a Ziegler-Natta catalyst composition comprising a procatalyst, a cocatalyst and a mixed external electron donor comprising a first selectivity control agent, a second selectivity control agent, and an activity limiting agent. A polymerization process incorporating the present catalyst composition produces a high-stiffness propylene-based polymer with a melt flow rate greater than about 50 g/10 min. The polymerization process occurs in a single reactor, utilizing standard hydrogen concentration with no visbreaking.
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