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公开(公告)号：US20190169322A1
公开(公告)日：2019-06-06
申请号：US16315722
申请日：2017-06-14
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Francis C. Rix , Rhutesh K. Shah , Rainer Kolb , Jo Ann M. Canich , Peijun Jiang , Periagaram S. Ravishankar , Syamal Tallury
IPC: C08F4/659 , C08F4/6192 , C08F110/06 , B01J31/22
Abstract: Processes are provided which include copolymerization using two different metallocene catalysts, one capable of producing high Mooney-viscosity polymers and one suitable for producing lower Mooney-viscosity polymers having at least a portion of vinyl terminations. The two catalysts may be used together in polymerization to produce copolymer compositions of particularly well-tuned properties. For instance, polymerizations are contemplated to produce high-Mooney metallocene polymers that exhibit excellent processability and elasticity, notwithstanding their high Mooney viscosity. Other polymerizations are also contemplated in which lower-Mooney metallocene polymers are produced, which also exhibit excellent processability and elasticity, while furthermore having excellent cure properties suitable in curable elastomer compound applications. Many of the contemplated polymerizations include controlling the ratio of the two metallocene catalysts used in the polymerization so as to obtain the desired Mooney viscosity and desired rheology (indicated by Mooney Relaxation Area) of the copolymer compositions.
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公开(公告)号：US20200157328A1
公开(公告)日：2020-05-21
申请号：US16667381
申请日：2019-10-29
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Paul E. Rollin, JR. , John W. M. Roberts , Jessica L. Prince , Syamal Tallury , Narayanaswami Dharmarajan , Andrew V. Stephens , Louis K. Apraku-Boadi
Abstract: A fiber or nonwoven and methods for making and using same are provided herein. The fiber or nonwoven can contain at least one primary polypropylene, at least one polyalphaolefin, and at least one propylene-based elastomer. The propylene-based elastomer can have a heat of fusion less than about 80 J/g. The propylene-based elastomer can also include greater than 50 wt % propylene and from about 3 to about 25 wt % units derived from one or more C2 or C4-C12 α-olefins, based on a total weight of the propylene-based elastomer.
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Patent Agency Ranking
公开(公告)号：US10808049B2
公开(公告)日：2020-10-20
申请号：US16315874
申请日：2017-06-14
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Francis C. Rix , Rhutesh K. Shah , Rainer Kolb , Jo Ann M. Canich , Peijun Jiang , Periagaram S. Ravishankar , Syamal Tallury , Narayanaswami Dharmarajan
IPC: C08F210/06 , C08F210/08 , C08F210/18 , C08F4/6592
Abstract: Processes are provided which include copolymerization using two different metallocene catalysts, one capable of producing high Mooney-viscosity polymers and one suitable for producing lower Mooney-viscosity polymers having at least a portion of vinyl terminations. The two catalysts may be used together in polymerization to produce copolymer compositions of particularly well-tuned properties. For instance, polymerizations are contemplated to produce high-Mooney metallocene polymers that exhibit excellent processability and elasticity, notwithstanding their high Mooney viscosity. Other polymerizations are also contemplated in which lower-Mooney metallocene polymers are produced, which also exhibit excellent processability and elasticity, while furthermore having excellent cure properties suitable in curable elastomer compound applications. Many of the contemplated polymerizations include controlling the ratio of the two metallocene catalysts used in the polymerization so as to obtain the desired Mooney viscosity and desired rheology (indicated by Mooney Relaxation Area) of the copolymer compositions.
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公开(公告)号：US10759900B1
公开(公告)日：2020-09-01
申请号：US16868158
申请日：2020-05-06
Inventor： Katherine V. Heifferon , Timothy E. Long , S. Richard Turner , Yong Yang , Syamal Tallury , Ting Chen , Javier Guzman
IPC: C08G63/191 , C08G63/185 , C08G63/80 , C08G63/06 , C09K19/38
Abstract: Liquid crystalline hydroquinone-3,4′-biphenyl dicarboxylate polyesters, and methods of making them. The polyesters may be melt processed at a temperature below the thermal decomposition temperature and the isotropic temperature, and may form a liquid crystalline glass phase. The polyesters may be formed by polycondensation of hydroquinone or a hydroquinone derivative with 3,4′-biphenyl dicarboxylic acid.
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公开(公告)号：US20200223951A1
公开(公告)日：2020-07-16
申请号：US16315874
申请日：2017-06-14
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Francis C. Rix , Rhutesh K. Shah , Rainer Kolb , Jo Ann M. Canich , Peijun Jiang , Periagaram S. Ravishankar , Syamal Tallury , Narayanaswami Dharmarajan
IPC: C08F4/6592 , C08F210/18 , C08F210/08 , C08F210/06
Abstract: Processes are provided which include copolymerization using two different metallocene catalysts, one capable of producing high Mooney-viscosity polymers and one suitable for producing lower Mooney-viscosity polymers having at least a portion of vinyl terminations. The two catalysts may be used together in polymerization to produce copolymer compositions of particularly well-tuned properties. For instance, polymerizations are contemplated to produce high-Mooney metallocene polymers that exhibit excellent processability and elasticity, notwithstanding their high Mooney viscosity. Other polymerizations are also contemplated in which lower-Mooney metallocene polymers are produced, which also exhibit excellent processability and elasticity, while furthermore having excellent cure properties suitable in curable elastomer compound applications. Many of the contemplated polymerizations include controlling the ratio of the two metallocene catalysts used in the polymerization so as to obtain the desired Mooney viscosity and desired rheology (indicated by Mooney Relaxation Area) of the copolymer compositions.
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公开(公告)号：US11352451B2
公开(公告)日：2022-06-07
申请号：US16315722
申请日：2017-06-14
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Francis C. Rix , Rhutesh K. Shah , Rainer Kolb , Jo Ann M. Canich , Peijun Jiang , Periagaram S. Ravishankar , Syamal Tallury
IPC: C08F4/6592 , C08F210/18 , B01J31/22 , C08F4/6192 , C08F110/06 , C08F4/659
Abstract: Processes are provided which include copolymerization using two different metallocene catalysts, one capable of producing high Mooney-viscosity polymers and one suitable for producing lower Mooney-viscosity polymers having at least a portion of vinyl terminations. The two catalysts may be used together in polymerization to produce copolymer compositions of particularly well-tuned properties. For instance, polymerizations are contemplated to produce high-Mooney metallocene polymers that exhibit excellent processability and elasticity, notwithstanding their high Mooney viscosity. Other polymerizations are also contemplated in which lower-Mooney metallocene polymers are produced, which also exhibit excellent processability and elasticity, while furthermore having excellent cure properties suitable in curable elastomer compound applications. Many of the contemplated polymerizations include controlling the ratio of the two metallocene catalysts used in the polymerization so as to obtain the desired Mooney viscosity and desired rheology (indicated by Mooney Relaxation Area) of the copolymer compositions.
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公开(公告)号：US20200270396A1
公开(公告)日：2020-08-27
申请号：US16868158
申请日：2020-05-06
Inventor： Katherine V. Heifferon , Timothy E. Long , S. Richard Turner , Yong Yang , Syamal Tallury , Ting Chen , Javier Guzman
IPC: C08G63/191 , C08G63/185 , C08G63/06 , C08G63/80
Abstract: Liquid crystalline hydroquinone-3,4′-biphenyl dicarboxylate polyesters, and methods of making them. The polyesters may be melt processed at a temperature below the thermal decomposition temperature and the isotropic temperature, and may form a liquid crystalline glass phase. The polyesters may be formed by polycondensation of hydroquinone or a hydroquinone derivative with 3,4′-biphenyl dicarboxylic acid.
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