公开(公告)号：US11084919B2

公开(公告)日：2021-08-10

申请号：US16310036

申请日：2017-06-26

申请人： BOREALIS AG

发明人： Jingbo Wang ,  Friedrich Berger ,  Petar Doshev ,  Manfred Gruenberger ,  Martina Sandholzer ,  Markus Gahleitner

IPC分类号： C08L23/12 ,  C08F210/16 ,  C08L23/16

摘要： The present invention is directed to a polypropylene composition (C) comprising a heterophasic propylene copolymer (RAHECO) and a propylene homopolymer (H-PP) as well as a process for the preparation of said polypropylene composition and a film obtained from said polypropylene composition (C).

公开(公告)号：US20210238324A1

公开(公告)日：2021-08-05

申请号：US17053271

申请日：2019-05-28

申请人： NOK CORPORATION

发明人： Tetsuro NEGAMI

IPC分类号： C08F210/16 ,  C08K5/47 ,  C08K5/14 ,  C08K3/06 ,  C08F210/06 ,  F16F1/36

摘要： A rubber composition is provided which is excellent in crosslinking characteristics and processability and is excellent in durability and heat resistance after crosslinking by using a sulfur-based crosslinking agent and a peroxide crosslinking agent in combination. The rubber composition includes 100 parts by mass of ethylene-propylene non-conjugated polyene copolymer, 1 to 3 parts by mass of peroxide crosslinking agent, and 0.1 to 0.6 parts by mass of thiazole-based crosslinking promoter. A content ratio of propylene is 30 to 55 percent by the total content of ethylene and propylene in the EPDM polymer.

公开(公告)号：US11078352B2

公开(公告)日：2021-08-03

申请号：US15559366

申请日：2016-03-17

申请人： MITSUI CHEMICALS, INC.

发明人： Kotaro Ichino ,  Tomohiro Yamaguchi ,  Yukio Aita ,  Yuji Noguchi

IPC分类号： C08L23/08 ,  C08J3/24 ,  C08L23/00 ,  C08L61/06 ,  C08F210/16

摘要： [Problem] The purpose of the invention is to provide: a thermoplastic elastomer composition capable of providing molded articles that are lightweight, have better oil resistance than those provided by conventional cross-linked thermoplastic elastomers, and have hardness and mechanical properties such as tensile strength and tensile elongation that are equal to or superior to those provided by conventional cross-linked thermoplastic elastomers; and an ethylene/α-olefin/unconjugated polyene copolymer having little compression set at low temperature as well as flexibility and an excellent balance of rubber elasticity at low temperature and tensile strength at normal temperature.
[Solution] Produced are: a thermoplastic elastomer composition obtained by dynamically crosslinking a mixture containing a crystalline olefin polymer (A), an ethylene/α-olefin (having 4-20 carbon atoms)/unconjugated polyene copolymer (1B) that satisfies specific requirements, and a phenol resin-based crosslinking agent (C); and an ethylene-α-olefin/unconjugated polyene copolymer (2B) that satisfies specific requirements.

公开(公告)号：US20210230326A1

公开(公告)日：2021-07-29

申请号：US17050089

申请日：2019-05-03

申请人： LG Chem, Ltd.

发明人： Sang Eun Park ,  Eun Jung Lee ,  Hyun Jin Ju ,  In Sung Park ,  Choong Hoon Lee ,  Jin Sam Gong ,  Jung Ho Jun ,  Rae Keun Gwak

IPC分类号： C08F210/16

摘要： An olefin-based copolymer and method of making the same are disclosed herein. In some embodiments, the olefin-based copolymer includes a repeating unit derived from an alpha-olefin, wherein the alphas-olefin is present in the copolymer at 15 wt % to 45 wt %, wherein the copolymer has a density (d) of 0.85 to 0.89 g/cc, a melt index (MI), measured at 190° C. and 2.16 kg load, of 15 g/10 min to 100 g/10 min, and a hardness defined by Equation 1. The olefin-based copolymer has improved hardness and is highly flowable, and may show improved physical properties of tensile strength, elongation rate and flexural modulus.

公开(公告)号：US11072670B2

公开(公告)日：2021-07-27

申请号：US16765352

申请日：2018-11-28

申请人： LG Chem, Ltd.

发明人： Ye Jin Lee ,  Hye Kyung Lee ,  Eun Kyoung Song ,  Daesik Hong ,  Byung Seok Kim ,  Eunyoung Shin ,  Jinyoung Kwak

IPC分类号： C08F110/02 ,  C08F210/16 ,  C08F210/14

摘要： A catalyst composition and a method for preparing an olefin polymer by using the same are provided herein. In some embodiments, a catalyst composition includes a transition metal compound having a compound (A) represented by Chemical Formula 1 and a compound (B) represented by Chemical Formula 2 present in a molar ratio of 1.6:1 to 18. The catalyst composition has high activity in an olefin polymerization reaction and can contribute to a reduction of catalyst cost. The catalyst composition aides in high copolymerizability of olefin monomers, and the produced olefin polymers can exhibit excellent processability and long-term physical properties, suitable for a pipe.

公开(公告)号：US20210221929A1

公开(公告)日：2021-07-22

申请号：US17219622

申请日：2021-03-31

申请人： NOVA CHEMICALS (INTERNATIONAL) S.A.

发明人： Niousha Kazemi ,  Monika Kleczek ,  Vinod Konaganti ,  Bronwyn Gillon ,  Shivendra Goyal ,  Fazle Sibtain ,  Sepideh Kasiri ,  Stephen Salomons ,  Kenneth Taylor ,  Mehdi Keshtkar

IPC分类号： C08F210/16 ,  C08J5/18 ,  C08L23/08 ,  B32B27/32

摘要： This disclosure relates to ethylene interpolymer compositions and films prepared therefrom. Specifically: ethylene interpolymer products having: a dimensionless Long Chain Branching Factor, LCBF, greater than or equal to 0.001; a residual catalytic metal of from ≥0.03 to ≤5 ppm of hafnium, and; a dimensionless unsaturation ratio, UR, of from ≥−0.40 to ≤0.06, wherein UR is defined by the following relationship; UR=(SCU−TU)/TU, where SCU is the amount of a side chain unsaturation per 100 carbons and TU is amount of a terminal unsaturation per 100 carbons, in said ethylene interpolymer product. The disclosed ethylene interpolymer products have a melt index from about 0.3 to about 500 dg/minute, a density from about 0.855 to about 0.975 g/cc, a polydispersity (Mw/Mn) from about 1.7 to about 25 and a Composition Distribution Breadth Index (CDBI50) from about 1% to about 98%.

公开(公告)号：US20210198391A1

公开(公告)日：2021-07-01

申请号：US17201557

申请日：2021-03-15

申请人： Univation Technologies, LLC

发明人： Donna J. Crowther ,  C. Jeff Harlan ,  Jackie Lovell ,  Haiqing Peng

IPC分类号： C08F4/6592 ,  C08J5/18 ,  C07F17/00 ,  B01J31/22 ,  C07F7/08 ,  C08F110/02 ,  C08F210/14 ,  C08F210/16

摘要： Catalyst systems and methods for making and using the same are disclosed. A catalyst composition is provided that includes a catalyst compound supported to form a supported catalyst system, the catalyst compound including: where each of R1, R2, R3, R4, R5, R6, R7 and X are as discussed herein.

公开(公告)号：US11046843B2

公开(公告)日：2021-06-29

申请号：US16524600

申请日：2019-07-29

申请人： NOVA Chemicals (International) S.A.

发明人： Vinod Konaganti ,  Sepideh Kasiri ,  Shivendra Goyal ,  Monika Kleczek ,  Fazle Sibtain ,  Marzieh Ebrahimi

IPC分类号： C08L23/00 ,  C08L23/16 ,  C08L23/08 ,  C08F4/02 ,  C08F4/6592 ,  C08F210/14 ,  C08F210/16 ,  C08F4/659 ,  C08F2/00

摘要： An ethylene copolymer composition comprises: a first ethylene copolymer having a density of from 0.855 to 0.913 g/cm3, a molecular weight distribution, Mw/Mn of from 1.7 to 2.3, and a melt index, I2 of from 0.1 to 20 g/10 min; a second ethylene copolymer having a density of from 0.875 to 0.936 g/cm3, a molecular weight distribution, Mw/Mn of from 2.3 to 6.0, and a melt index, I2 of from 0.3 to 100 g/10 min; and optionally a third ethylene copolymer; where the first ethylene copolymer has more short chain branches per thousand carbon atoms than the second ethylene copolymer and the density of the second ethylene copolymer is equal to or higher than the density of the first ethylene copolymer. The ethylene copolymer composition has a density of from 0.865 to 0.913 g/cm3; a melt index, I2 of from 0.5 to 10 g/10 min; and a fraction eluting at from 90 to 105° C., having an integrated area of greater than 4 weight percent in a CTREF analysis; and at least 0.0015 parts per million (ppm) of hafnium.
Blown film made from the ethylene copolymer composition has a hot tack window (HTW) of at least 45° C. (at a film thickness of about 2 mil) and a seal initiation temperature (SIT) of less than 95° C. (at a film thickness of about 2 mil).

公开(公告)号：US11041035B2

公开(公告)日：2021-06-22

申请号：US16289918

申请日：2019-03-01

申请人： ExxonMobil Chemical Patents Inc.

发明人： John R. Hagadorn ,  Jo Ann M. Canich ,  Jingwen Zhang ,  Peijun Jiang ,  Britni J. Brobey

IPC分类号： C08F2/38 ,  C08F4/643 ,  C08F4/642 ,  C08F210/06 ,  C08F236/20 ,  C08F210/16 ,  C08F10/02 ,  C08F2/00 ,  C08K5/01 ,  C08F4/64 ,  C08F4/659 ,  C08K5/56

摘要： The present disclosure provides methods for producing an olefin polymer including: i) contacting alpha-olefin with a first catalyst system comprising a first non-metallocene catalyst, a first activator, and a reversible chain transfer agent to form a first polymer; ii) contacting the first polymer with a coupling agent in the presence of a catalyst, an activator; and iii) obtaining a second polymer. The present disclosure further provides polymers having a g′vis value from about 0.4 to about 0.8 and a vinyl unsaturation content of 0.8 or greater vinyls/1000 carbons, and preferably low gel content.

公开(公告)号：US11041034B2

公开(公告)日：2021-06-22

申请号：US16250710

申请日：2019-01-17

申请人： ExxonMobil Chemical Patents Inc.

发明人： Crisita Carmen H. Atienza ,  Rhutesh K. Shah ,  Ron Walker ,  John R. Hagadorn ,  Sudhin Datta

IPC分类号： C08F210/16 ,  C08F210/02 ,  C08F210/06 ,  C08F236/04 ,  C08F236/20 ,  C08F4/64 ,  B01J31/18

摘要： A process to produce a branched ethylene-α-olefin diene elastomer comprising combining a catalyst precursor and an activator with a feed comprising ethylene, C3 to C12 α-olefins, and a dual-polymerizable diene to obtain a branched ethylene-α-olefin diene elastomer; where the catalyst precursor is selected from pyridyldiamide and quinolinyldiamido transition metal complexes. The branched ethylene-α-olefin diene elastomer may comprise within a range from 40 to 80 wt % of ethylene-derived units by weight of the branched ethylene-α-olefin diene elastomer, and 0.1 to 2 wt % of singly-polymerizable diene derived units, 0.1 to 2 wt % of singly-polymerizable diene derived units, and the remainder comprising C3 to C12 α-olefin derived units, wherein the branched ethylene-α-olefin diene elastomer has a weight average molecular weight (Mw) within a range from 100 kg/mole to 300 kg/mole, an average branching index (g′avg) of 0.9 or more, and a branching index at very high Mw (g′1000) of less than 0.9.