Patents by Inventor Krishna Renganath SARMA
Krishna Renganath SARMA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10544243Abstract: The present disclosure provides a Ziegler-Natta catalyst composition for preparing polymers of ethylene monomers having ultrahigh molecular weight, said composition comprises (i) a pro-catalyst component containing a reaction product of a magnesium containing compound and a titanium containing compound, characterized in that said pro-catalyst component comprises magnesium, titanium and chlorine in an amount ranging between 15 and 18 mole %; 20 and 23 mole %; and 60 and 64 mole %, respectively, all proportions being with respect to the total weight of the Ziegler-Natta catalyst composition; (ii) a co-catalyst component; and (iii) at least one external electron donor compound selected from the group of organosilane compounds having the general formula (I), wherein R1, R2, R3 and R4 are all the same or all are different, or some are the same, and are individually selected from the group consisting of linear or branched alkyl groups, cycloalkyl groups, aryl groups, alkoxy and aryloxy groups.Type: GrantFiled: February 16, 2015Date of Patent: January 28, 2020Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Yogesh Popatrao Patil, Krishna Renganath Sarma, Mahuya Bagui, Viralkumar Patel, Raksh Vir Jasra, Ajit Behari Mathur, Suketu Vakil
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Patent number: 10392481Abstract: The present disclosure relates to a process for the preparation of high strength and high modulus polyethylene products/laminates consisting of steps such as providing a pre-dried, at least 50% disentangled ultra-high molecular weight polyethylene (UHMWPE) powder, feeding the UHMWPE powder having temperature ranging from ?15° C. to 50° C., at the nip of at least one pair of heated, polished counter rotating calendaring rollers, rotating at different roller speeds to obtain at least one pre-laminate and hot stretching the pre-laminate(s) at a pre-determined temperature and pre-determined stretching speed to obtain high strength laminates. The laminates provided by the present disclosure have tensile strength ranging between 0.5 GPa and 3.0 GPa and tensile modulus ranging between 40 GPa and 200 GPa.Type: GrantFiled: May 26, 2014Date of Patent: August 27, 2019Assignee: Reliance Industries LimitedInventors: Ajit Behari Mathur, Satya Srinivasa Rao Gandham, Uma Sankar Satpathy, Krishna Renganath Sarma, Yogesh Popatrao Patil, Nanubhai Fuljibhai Patel, Gaurang Manilal Mehta, Raksh Vir Jasra
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Patent number: 10190236Abstract: The present disclosure relates to a compact polymer gel consisting of disentangled ultrahigh molecular weight polyethylene (dis-UHMWPE), at least one nucleator, at least one filler and at least one fluid medium. The present disclosure also provides a process for the preparation of the compact polymeric gel and fibers from the compact polymeric gel of both low and high denier values. The fibers prepared in accordance with the present process have tensile strength ranging from 2.5 to 13 GPa, tensile modulus ranging from 100 to 270 GPa.Type: GrantFiled: February 17, 2015Date of Patent: January 29, 2019Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Uma Sankar Satpathy, Satya Srinivasa Rao Gandham, Ajit Behari Mathur, Raksh Vir Jasra, Krishna Renganath Sarma, Amit Kumar Punamchand Shah, Yogini Maheshbhai Amin, Gaurang Manilal Mehta, Nanubhai Fuljibhai Patel, Viralkumar Patel
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Patent number: 10105880Abstract: The present disclosure relates to a process for preparing of high thermal conductivity and high heat capacity oriented ultrahigh molecular weight polyethylene (UHMWPE) product. The process includes feeding UHMWPE through rollers to obtain a pre-laminate which is further hot stretched to obtain the oriented UHMWPE product having high thermal conductivity and high heat capacity. The temperature of stretching is maintained below the melt temperature of the UHMWPE throughout the entire process. There is also provided a high thermal conductivity and high heat capacity oriented UHMWPE product prepared by the process of the present disclosure. The oriented UHMWPE product is characterized in the axial thermal conductivity in the range of 70 to 200 W/mK, transverse direction thermal conductivity in the range of 0.022 to 0.045 W/mK and heat capacity in the range of 6 to 25 MJ/m3K.Type: GrantFiled: February 27, 2015Date of Patent: October 23, 2018Assignee: Reliance Industries LimitedInventors: Ajit Behari Mathur, Shivaji Vijay Kadam, Satya Srinivasa Rao Gandham, Uma Sankar Satpathy, Krishna Renganath Sarma, Nanubhai Fuljibhai Patel, Gaurang Manilal Mehta, Yogini Maheshbhai Amin, Amit Kumar Punamchand Shah, Viral Kumar Patel, Raksh Vir Jasra, Devesh Kumar Shukla, Ashishkumar Indravadan Parekh
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Patent number: 9915012Abstract: The present disclosure relates to a compact polymer gel consisting of ultrahigh molecular weight polyethylene (UHMWPE), at least one nucleator, at least one filler and at least one fluid medium. The present disclosure also provides a process for the preparation of the compact polymeric gel and fibers from the compact polymeric gel. The fibers prepared in accordance with the present process have tensile strength ranging from 2.5 to 10 GPa and tensile modulus ranging from 110 to 300 GPa.Type: GrantFiled: May 21, 2014Date of Patent: March 13, 2018Assignee: Reliance Industries LimitedInventors: Uma Sankar Satpathy, Satya Srinivasa Rao Gandham, Ajit Behari Mathur, Raksh Vir Jasra, Krishna Renganath Sarma, Amit Kumar Punamchand Shah, Yogini Maheshbhai Amin, Gaurang Manilal Mehta, Nanubhai Fuljibhai Patel, Viralkumar Patel
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Patent number: 9884927Abstract: The present disclosure provides a heterogeneous Ziegler-Natta catalyst system to be used in the preparation of ultra-high molecular weight polymers (UHMWP). The system includes at least one procatalyst, at least one co-catalyst, at least one hydrocarbon medium and at least one external donor, wherein the ratio of elemental magnesium to elemental titanium to halide, in the procatalyst, is 1:1.3:3.7; the ratio of elemental aluminum, present in the co-catalyst to elemental titanium, present in the procatalyst, ranges between 6:1 and 12:1; and the ratio of elemental silicon, present in the external donor to elemental titanium, present in the procatalyst, ranges between 1:10 and 10:1. The present disclosure also provides a process for preparation of UHMWPE using the heterogeneous Ziegler-Natta catalyst system of the present disclosure.Type: GrantFiled: December 13, 2013Date of Patent: February 6, 2018Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Krishna Renganath Sarma, Yogesh Popatrao Patil, Viralkumar Patel, Mahuya Bagui, Ajit Behari Mathur, Raksh Vir Jasra, Suketu Vakil, Vijay Shivaji Kadam, Uma Sankar Satpathy, Satya Srinivasa Rao Gandham, Jyotindra Bachubhai Patel, Mitul Sureshchandra Sheth
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Patent number: 9624363Abstract: In the present disclosure an easily processable ultrahigh molecular weight polyethylene and a process for preparation thereof is disclosed wherein the easy processable ultrahigh molecular weight polyethylene is prepared by melt mixing a first ultrahigh molecular weight polyethylene having poor process-ability and a second ultrahigh molecular weight polyethylene along with a minimal amount of solvent. The easily processable ultrahigh molecular weight polyethylene is melt processable below its melting point and requires lesser compression molding time as compared to the first ultrahigh molecular weight polyethylene.Type: GrantFiled: December 13, 2013Date of Patent: April 18, 2017Assignee: Reliance Industries LimitedInventors: Uma Sankar Satpathy, Satya Srinivasa Rao Gandham, Ajit Behari Mathur, Raksh Vir Jasra, Krishna Renganath Sarma
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Patent number: 9611345Abstract: The present disclosure relates to a transition metal based pro-catalyst represented by Formula I: wherein, the substituents have the meaning as defined in the specification. The present disclosure also relates to a process for preparing the transition metal based pro-catalyst represented by Formula I and the catalyst composition obtained therefrom. Further, the present disclosure relates to a process for polymerizing olefins by employing the catalyst composition comprising the transition metal based pro-catalyst represented by Formula I.Type: GrantFiled: April 15, 2014Date of Patent: April 4, 2017Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Mahuya Bagui, Yogesh Popatrao Patil, Viralkumar Patel, Krishna Renganath Sarma, Raksh Vir Jasra, Ajit Behari Mathur, Suketu Vakil
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Patent number: 9574040Abstract: In accordance with the present disclosure, there is provided a solid state graft copolymerization process for the preparation of disentangled ultrahigh molecular weight polyethylene graft copolymers in which disentangled ultrahigh molecular weight polyethylene is admixed with at least one functional monomer and a free radical initiator to obtain a mixture; and the mixture thus obtained is subjected to solid state polymerization to obtain a graft copolymer of disentangled ultrahigh molecular weight polyethylene. The graft copolymers of disentangled ultrahigh molecular weight polyethylene shows better crystallization temperature that ranges between 117° C. to 121° C. and improved decomposition temperature (T100) that ranges between 460° C. to 480° C.Type: GrantFiled: September 10, 2013Date of Patent: February 21, 2017Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Satya Srinivasa Rao Gandham, Ajit Behari Mathur, Uma Sankar Satpathy, Krishna Renganath Sarma, Raksh Vir Jasra
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Publication number: 20170009382Abstract: The present disclosure relates to a compact polymer gel consisting of disentangled ultrahigh molecular weight polyethylene (dis-UHMWPE), at least one nucleator, at least one filler and at least one fluid medium. The present disclosure also provides a process for the preparation of the compact polymeric gel and fibers from the compact polymeric gel of both low and high denier values. The fibers prepared in accordance with the present process have tensile strength ranging from 2.5 to 13 GPa, tensile modulus ranging from 100 to 270 GPa.Type: ApplicationFiled: February 17, 2015Publication date: January 12, 2017Applicant: RELIANCE INDUSTRIES LIMITEDInventors: Uma Sankar SATPATHY, Satya Srinivasa Rao GANDHAM, Ajit Behari MATHUR, Raksh Vir JASRA, Krishna Renganath SARMA, Amit Kumar Punamchand SHAH, Yogini Maheshbhai AMIN, Gaurang Manilal MEHTA, Nanubhai Fuljibhai PATEL, Viralkumar PATEL
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Publication number: 20160368182Abstract: The present disclosure relates to a process for preparing of high thermal conductivity and high heat capacity oriented ultrahigh molecular weight polyethylene (UHMWPE) product. The process includes feeding UHMWPE through rollers to obtain a pre-laminate which is further hot stretched to obtain the oriented UHMWPE product having high thermal conductivity and high heat capacity. The temperature of stretching is maintained below the melt temperature of the UHMWPE throughout the entire process. There is also provided a high thermal conductivity and high heat capacity oriented UHMWPE product prepared by the process of the present disclosure. The oriented UHMWPE product is characterized in the axial thermal conductivity in the range of 70 to 200 W/mK, transverse direction thermal conductivity in the range of 0.022 to 0.045 W/mK and heat capacity in the range of 6 to 25 MJ/m3K.Type: ApplicationFiled: February 27, 2015Publication date: December 22, 2016Applicant: Reliance Industries LimitedInventors: Ajit Behari Mathur, Shivaji Vijay Kadam, Satya Srinivasa Rao Gandham, Uma Sankar Satpathy, Krishna Renganath Sarma, Nanubhai Fuljibhai Patel, Gaurang Manilal Mehta, Yogini Maheshbhai Amin, Amit Kumar Punamchand Shah, Viral Kumar Patel, Raksh Vir Jasra, Devesh Kumar Shukla, Ashishkumar Indravadan Parekh
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Patent number: 9512307Abstract: A polymer composition has homogenous dispersion of a first polymer with a second polymer. The first polymer includes but is not limited to ethylene based homopolymer and ethylene based copolymer. The second polymer has molecular weight higher than the molecular weight of the first polymer and heat of fusion greater than 200 J/g.Type: GrantFiled: October 4, 2013Date of Patent: December 6, 2016Assignee: Reliance Industries LimitedInventors: Ajit Behari Mathur, Satya Srinivasa Rao Gandham, Uma Sankar Satpathy, Krishna Renganath Sarma, Vijay Shivaji Kadam, Raksh Vir Jasra
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Publication number: 20160347881Abstract: The present disclosure provides a Ziegler-Natta catalyst composition for preparing polymers of ethylene monomers having ultrahigh molecular weight, said composition comprises (i) a pro-catalyst component containing a reaction product of a magnesium containing compound and a titanium containing compound, characterized in that said pro-catalyst component comprises magnesium, titanium and chlorine in an amount ranging between 15 and 18 mole %; 20 and 23 mole %; and 60 and 64 mole %, respectively, all proportions being with respect to the total weight of the Ziegler-Natta catalyst composition; (ii) a co-catalyst component; and (iii) at least one external electron donor compound selected from the group of organosilane compounds having the general formula (I), wherein R1, R2, R3 and R4 are all the same or all are different, or some are the same, and are individually selected from the group consisting of linear or branched alkyl groups, cycloalkyl groups, aryl groups, alkoxy and aryloxy groups.Type: ApplicationFiled: February 16, 2015Publication date: December 1, 2016Inventors: Yogesh Popatrao Patil, Krishna Renganath Sarma, Mahuya Bagui, Viralkumar Patel, Raksh Vir Jasra, Ajit Behari Mathur, Suketu Vakil
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Publication number: 20160168758Abstract: The present disclosure relates to a compact polymer gel consisting of ultrahigh molecular weight polyethylene (UHMWPE), at least one nucleator, at least one filler and at least one fluid medium. The present disclosure also provides a process for the preparation of the compact polymeric gel and fibers from the compact polymeric gel. The fibers prepared in accordance with the present process have tensile strength ranging from 2.5 to 10 GPa and tensile modulus ranging from 110 to 300 GPa.Type: ApplicationFiled: May 21, 2014Publication date: June 16, 2016Applicant: Reliance Industries LimitedInventors: Uma Sankar Satpathy, Satya Srinvasa Rao Gandham, Ajit Behari Mathur, Raksh Fir Jasra, Krishna Renganath Sarma, Amit Kumar Punamchand Shah, Yogini Maheshbhai Amin, Gaurang Manilal Mehta, Nanubhai Fuljibhai Patel, Viralkumar Patel
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Publication number: 20160108146Abstract: The present disclosure relates to a transition metal based pro-catalyst represented by Formula I: wherein, the substituents have the meaning as defined in the specification. The present disclosure also relates to a process for preparing the transition metal based pro-catalyst represented by Formula I and the catalyst composition obtained therefrom. Further, the present disclosure relates to a process for polymerizing olefins by employing the catalyst composition comprising the transition metal based pro-catalyst represented by Formula I.Type: ApplicationFiled: April 15, 2014Publication date: April 21, 2016Inventors: Mahuya BAGUI, Yogesh Popatrao PATIL, Viralkumar PATEL, Krishna Renganath SARMA, Raksh Vir JASRA, Ajit Behari MATHUR, Suketu VAKIL
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Publication number: 20160090453Abstract: The present disclosure relates to a process for the preparation of high strength and high modulus polyethylene products/laminates consisting of steps such as providing a pre-dried, at least 50% disentangled ultra-high molecular weight polyethylene (UHMWPE) powder, feeding the UHMWPE powder having temperature ranging from ?15° C. to 50° C., at the nip of at least one pair of heated, polished counter rotating calendaring rollers, rotating at different roller speeds to obtain at least one pre-laminate and hot stretching the pre-laminate(s) at a pre-determined temperature and pre-determined stretching speed to obtain high strength laminates. The laminates provided by the present disclosure have tensile strength ranging between 0.5 GPa and 3.0 GPa and tensile modulus ranging between 40 GPa and 200 GPa.Type: ApplicationFiled: May 26, 2014Publication date: March 31, 2016Applicant: Reliance Industries LimitedInventors: Ajit Behari Mathur, Satya Srinivasa Rao Gandham, Uma Sankar Satpathy, Krishna Renganath Sarma, Yogesh Popatrao Patil, Nanubhai Fuljibhai Patel, Gaurang Manilal Mehta, Raksh Vir Jasra
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Patent number: 9260538Abstract: There is provided a chemically immobilized heterogeneous single site polymerization catalyst represented by Formula I. wherein, M is a Group IV transition metal; R1 is or a functionalized inorganic oxide support selected from the group consisting of such that R8 is a molecule having a carboxylic or sulphonic acid group; R2-R5, are independently, H or a hydrocarbon; R6 is t-butyl; R7 is a functionalized inorganic oxide support selected from the group consisting of such that R8 is a molecule having a carboxylic or sulphonic acid group; and X1 and X2 are independently F, Cl, Br or I. There is also provided a method for the preparation of the chemically immobilized heterogeneous single site polymerization catalyst as represented by Formula I.Type: GrantFiled: January 8, 2013Date of Patent: February 16, 2016Assignee: Reliance Industries LimitedInventors: Krishna Renganath Sarma, Rakshvir Jasra, Kayambu Kannan, Ajit Behari Mathur, Viralkumar Patel, Yogesh P. Patil
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Publication number: 20150344593Abstract: The present disclosure provides a heterogeneous Ziegler-Natta catalyst system to be used in the preparation of ultra-high molecular weight polymers (UHMWP). The system includes at least one procatalyst, at least one co-catalyst, at least one hydrocarbon medium and at least one external donor, wherein the ratio of elemental magnesium to elemental titanium to halide, in the procatalyst, is 1:1.3:3.7; the ratio of elemental aluminum, present in the co-catalyst to elemental titanium, present in the procatalyst, ranges between 6:1 and 12:1; and the ratio of elemental silicon, present in the external donor to elemental titanium, present in the procatalyst, ranges between 1:10 and 10:1. The present disclosure also provides a process for preparation of UHMWPE using the heterogeneous Ziegler-Natta catalyst system of the present disclosure.Type: ApplicationFiled: December 13, 2013Publication date: December 3, 2015Inventors: Krishna Renganath Sarma, Yogesh Popatrao Patil, Viralkumar Patel, Mahuya Bagui, Ajit Behari Mathur, Raksh Vir Jasra, Suketu Vakil, Vijay Shivaji Kadam, Uma Sankar Satpathy, Satya Srinivasa Rao Gandham, Jyotindra Bachubhai Patel, Mitul Sureshchandra Sheth
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Patent number: 9175108Abstract: The present invention relates to a non-cryogenic process for the large scale synthesis of disentangled ultra high molecular weight polyethylene (DUHMWPE) polymers. The process comprises of the following steps: a. mixing FI catalyst of formula I with a hydrocarbon solvent containing poly-methyl aluminoxane (P-MAO) co-catalyst in a vessel under stirring before polymerization or directly in the polymerization vessel at a temperature ranging between 25° C. and 29° C. under a dry Nitrogen atmosphere; and lower concentration of co-catalyst resulting in the associated benefits as described earlier in the claims and descriptions. b. pressurizing ethylene in the polymerization vessel and polymerizing ethylene in a solution or a suspension, continuously or batch wise, in one or more stages at a temperature is in the range of 30° C. to 50° C.Type: GrantFiled: April 10, 2014Date of Patent: November 3, 2015Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Krishna Renganath Sarma, Ajit Behari Mathur, Rakshvir Jasra, Sudhakar Padmanabhan, Shashikant, Viralkumar Patel
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Publication number: 20150307696Abstract: In the present disclosure an easily processable ultrahigh molecular weight polyethylene and a process for preparation thereof is disclosed wherein the easy processable ultrahigh molecular weight polyethylene is prepared by melt mixing a first ultrahigh molecular weight polyethylene having poor process-ability and a second ultrahigh molecular weight polyethylene along with a minimal amount of solvent. The easily processable ultrahigh molecular weight polyethylene is melt processable below its melting point and requires lesser compression molding time as compared to the first ultrahigh molecular weight polyethylene.Type: ApplicationFiled: December 13, 2013Publication date: October 29, 2015Applicant: RELIANCE INDUSTRIES LIMITEDInventors: Uma Sankar SATPATHY, Satya Srinivasa Rao GANDHAM, Ajit Behari MATHUR, Raksh Vir JASRA, Krishna Renganath SARMA