Patents by Inventor Sandeep Tyagi
Sandeep Tyagi 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: 10597470Abstract: The present application relates to a process for producing a multimodal polyethylene composition comprising the steps of blending a polyethylene fraction (A-1) having a weight average molecular weight Mw of equal to or more than 700 kg/mol to equal to or less than 10,000 kg/mol and a density of equal to or more than 920 kg/m3 to equal to or less than 960 kg/m3 and a polyethylene fraction (A-2) having a lower Mw as polyethylene fraction (A-1) and a density of equal to or more than 910 kg/m3 to equal to or less than 960 kg/m3 with a weight ratio of (A-1) to (A-2) of 45:55 to 80:20 to form a first polyethylene resin (A) having a Mw of equal to or more than 200 kg/mol to equal to or less than 1500 kg/mol, a melt flow rate MFR5 (190° C., 5 kg) of 0.Type: GrantFiled: December 21, 2015Date of Patent: March 24, 2020Assignee: BOREALIS AGInventors: Bernd Kretzschmar, Carl-Gustaf Ek, Thomas Rätzsch, Yi Liu, Sandeep Tyagi
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Publication number: 20170349678Abstract: The present application relates to a process for producing a multimodal polyethylene composition comprising the steps of blending a polyethylene fraction (A-1) having a weight average molecular weight Mw of equal to or more than 700 kg/mol to equal to or less than 10,000 kg/mol and a density of equal to or more than 920 kg/m3 to equal to or less than 960 kg/m3 and a polyethylene fraction (A-2) having a lower Mw as polyethylene fraction (A-1) and a density of equal to or more than 910 kg/m3 to equal to or less than 960 kg/m3 with a weight ratio of (A-1) to (A-2) of 45:55 to 80:20 to form a first polyethylene resin (A) having a Mw of equal to or more than 200 kg/mol to equal to or less than 1500 kg/mol, a melt flow rate MFR5 (190° C., 5 kg) of 0.Type: ApplicationFiled: December 21, 2015Publication date: December 7, 2017Inventors: Bernd KRETZSCHMAR, Carl-Gustaf EK, Thomas RÄTZSCH, Yi LIU, Sandeep TYAGI
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Patent number: 8865833Abstract: A method of preparing a polycarbonate nanocomposite comprising forming a reactant mixture comprising a nanomaterial, a solvent, a dihydroxy compound and an activated carbonate; and polymerizing the dihydroxy compound and the activated carbonate in the presence of the solvent to form the polycarbonate nanocomposite is disclosed. Also disclosed are polycarbonate nanocomposites prepared in accordance with this method, and thermoplastic compositions comprising the polycarbonate nanocomposites. Also disclosed are polycarbonate compositions comprising the nanomaterial.Type: GrantFiled: July 14, 2010Date of Patent: October 21, 2014Assignee: Sabic Global Technologies B.V.Inventors: Amit Biswas, Dibakar Dhara, Raja Krishnamurthy, Edward Kung, Parnasree Maiti, Roopali Rai, Vaidyanath Ramakrishnan, Vitthal Abaso Sawant, Rajashekhar Shiddappa Totad, Sandeep Tyagi
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Patent number: 8389626Abstract: Polycarbonate nanocomposites comprising a polycarbonate matrix having non-oxidized metal nanoparticles dispersed therein are disclosed. The polycarbonate nanocomposite is produced by a process comprising forming a reaction mixture comprising a dihydroxy compound, an activated carbonate, a metal precursor, and a solvent; and in-situ polymerizing the reaction mixture to form a nanocomposite comprising a polycarbonate matrix and metal nanoparticles dispersed therein. The metal precursor comprises a metal selected from a specified group. The nanocomposites have improved mechanical, optical, electrical and/or magnetic properties. Also disclosed are articles formed from such polycarbonate nanocomposites.Type: GrantFiled: March 28, 2008Date of Patent: March 5, 2013Assignee: Sabic Innovative Plastics IP BVInventors: Parnasree Maiti, Sonia Oberoi, Roopali Rai, Vaidyanath Ramakrishnan, Sandeep Tyagi
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Publication number: 20120149839Abstract: Polycarbonate nanocomposites comprising a polycarbonate matrix having non-oxidized metal nanoparticles dispersed therein are disclosed. The polycarbonate nanocomposite is produced by a process comprising forming a reaction mixture comprising a dihydroxy compound, an activated carbonate, a metal precursor, and a solvent; and in-situ polymerizing the reaction mixture to form a nanocomposite comprising a polycarbonate matrix and metal nanoparticles dispersed therein. The metal precursor comprises a metal selected from a specified group. The nanocomposites have improved mechanical, optical, electrical and/or magnetic properties. Also disclosed are articles formed from such polycarbonate nanocomposites.Type: ApplicationFiled: March 28, 2008Publication date: June 14, 2012Inventors: Parnasree Maiti, Sonia Oberoi, Roopali Rai, Vaidyanath Ramakrishnan, Sandeep Tyagi
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Patent number: 7858700Abstract: A thermoplastic composition comprising, based on the total weight of the thermoplastic composition, from 0.1 to 30 weight percent of an inorganic filler composition comprising an inorganic filler-polyorganosiloxane composite; up to 80 weight percent of a polycarbonate; and from 1 to 25 weight percent of an impact modifier. Methods of preparing the compositions and articles comprising the compositions are described.Type: GrantFiled: October 31, 2007Date of Patent: December 28, 2010Assignee: Sabic Innovative Plastics IP B.V.Inventors: Shrikant Bhat, Sriram Krishnamurthy, Roopali Rai, Sandeep Tyagi, Andries Adriaan Volkers
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Patent number: 7858680Abstract: Disclosed herein is a thermoplastic composition comprising: a polycarbonate; an impact modifier; a polycarbonate-polysiloxane copolymer; a poly(arylene ether)-polysiloxane copolymer; and an organophosphate in an amount of 2 to 20 weight percent based on the combined weight of polycarbonate, impact modifier, polycarbonate-polysiloxane copolymer, and poly(arylene ether)-polysiloxane copolymer, wherein the composition has a notched Izod impact strength of greater than or equal to 4 kilojoules per square meter (kJ/m2) as determined according to ISO 180/A, a melt viscosity rate of less than or equal to 130 Pascal seconds (Pa·s) as determined according to ISO11443 at 1500 s?1 and 280° C., and a UL94 rating of V1 or better at 0.8 millimeter thickness.Type: GrantFiled: December 29, 2008Date of Patent: December 28, 2010Assignee: Sabic Innovative Plastics IP B.V.Inventors: Vitthal Abaso Sawant, Srinivas Siripurapu, Raja Krishnamurthy, Sandeep Tyagi
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Publication number: 20100280176Abstract: A method of preparing a polycarbonate nanocomposite comprising forming a reactant mixture comprising a nanomaterial, a solvent, a dihydroxy compound and an activated carbonate; and polymerizing the dihydroxy compound and the activated carbonate in the presence of the solvent to form the polycarbonate nanocomposite is disclosed. Also disclosed are polycarbonate nanocomposites prepared in accordance with this method, and thermoplastic compositions comprising the polycarbonate nanocomposites. Also disclosed are polycarbonate compositions comprising the nanomaterial.Type: ApplicationFiled: July 14, 2010Publication date: November 4, 2010Applicant: SABIC INNOVATIVE PLASTICS IP B.V.Inventors: Amit Biswas, Dibakar Dhara, Raja Krishnamurthy, Edward Kung, Parnasree Maiti, Roopali Rai, Vaidyanath Ramakrishnan, Vitthal Abaso Sawant, Rajashekhar Shiddappa Totad, Sandeep Tyagi
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Publication number: 20100168293Abstract: Disclosed herein is a thermoplastic composition comprising: a polycarbonate; an impact modifier; a polycarbonate-polysiloxane copolymer; a poly(arylene ether)-polysiloxane copolymer; and an organophosphate in an amount of 2 to 20 weight percent based on the combined weight of polycarbonate, impact modifier, polycarbonate-polysiloxane copolymer, and poly(arylene ether)-polysiloxane copolymer, wherein the composition has a notched Izod impact strength of greater than or equal to 4 kilojoules per square meter (kJ/m2) as determined according to ISO 180/A, a melt viscosity rate of less than or equal to 130 Pascal seconds (Pa·s) as determined according to ISO11443 at 1500 s?1 and 280° C., and a UL94 rating of V1 or better at 0.8 millimeter thickness.Type: ApplicationFiled: December 29, 2008Publication date: July 1, 2010Inventors: Vitthal Abaso Sawant, Srinivas Siripurapu, Raja Krishnamurthy, Sandeep Tyagi
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Patent number: 7649057Abstract: A thermoplastic composition comprising a polycarbonate, an impact modifier, an aromatic vinyl copolymer, and a polyorganosiloxane has excellent mechanical properties, in addition to suitable low gloss performance. An article may be formed by molding, extruding, shaping or forming such a composition to form the article.Type: GrantFiled: December 14, 2005Date of Patent: January 19, 2010Assignee: SABIC Innovative Plastics IP B.V.Inventors: James Louis DeRudder, Raja Krishnamurthy, Rajashekhar Shiddappa Totad, Sandeep Tyagi, Robert Walter Venderbosch
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Patent number: 7557154Abstract: A polymer composition is disclosed, which comprises a matrix polymer, a fluoropolymer that may be at least partially encapsulated by an encapsulating polymer, and a filler. Methods for making the polymer compositions and articles made of such compositions are also disclosed. The compositions and article can have improved tensile modulus, ductility, and/or impact properties.Type: GrantFiled: December 23, 2004Date of Patent: July 7, 2009Assignee: SABIC Innovative Plastics IP B.V.Inventors: Naveen Agarwal, Satish Kumar Gaggar, Deval Gupta, Samik Gupta, Raja Krishnamurthy, Nisha Preschilla, Rajashekhar Shiddappa Totad, Sandeep Tyagi
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Publication number: 20090170998Abstract: Disclosed herein is a thermoplastic composition comprising about 49.9 to about 99.9 parts by weight of a polycarbonate polymer, up to about 50 parts by weight of an impact modifier, and about 0.1 to about 30 parts by weight silicon carbide particles, wherein the amounts of the polycarbonate polymer, impact modifier, and silicon carbide are each based on 100 parts by weight of the polycarbonate, silicon carbide particles, and impact modifier, wherein the thermoplastic composition has a melt volume rate (MVR) of greater than or equal to 5 cc/10 min. when measured at a temperature of 300° C. under a load of 1.2 kg according to ISO 1133, and wherein an article molded from the thermoplastic composition has a notched Izod impact (NII) of greater than or equal to 4 kJ/m2, when measured at a temperature of 23° C. and using a 2.7 J hammer, according to ISO 180. A method of making the composition, and articles formed therefrom, are also claimed.Type: ApplicationFiled: December 28, 2007Publication date: July 2, 2009Inventors: Deval Gupta, Raja Krishnamurthy, Vitthal Abaso Sawant, Rajashekhar Shiddappa Totad, Sandeep Tyagi
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Publication number: 20090111943Abstract: A thermoplastic composition comprising, based on the total weight of the thermoplastic composition, from 0.1 to 30 weight percent of an inorganic filler composition comprising an inorganic filler-polyorganosiloxane composite; up to 80 weight percent of a polycarbonate; and from 1 to 25 weight percent of an impact modifier. Methods of preparing the compositions and articles comprising the compositions are described.Type: ApplicationFiled: October 31, 2007Publication date: April 30, 2009Inventors: Shrikant Bhat, Sriram Krishnamurthy, Roopali Rai, Sandeep Tyagi, Andries Adriaan Volkers
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Publication number: 20080167414Abstract: A method of preparing a polycarbonate nanocomposite comprising forming a reactant mixture comprising a nanomaterial, a solvent, a dihydroxy compound and an activated carbonate; and polymerizing the dihydroxy compound and the activated carbonate in the presence of the solvent to form the polycarbonate nanocomposite is disclosed. Also disclosed are polycarbonate nanocomposites prepared in accordance with this method, and thermoplastic compositions comprising the polycarbonate nanocomposites. Also disclosed are polycarbonate compositions comprising the nanomaterial.Type: ApplicationFiled: August 29, 2007Publication date: July 10, 2008Inventors: Amit Biswas, Dibakar Dbara, Raja Krishnamurthy, Edward Kung, Parnasree Maiti, Roopali Raj, Vaidyanath Ramakrishnan, Vitthal Abaso Sawant, Rajashekhar Shiddappa Totad, Sandeep Tyagi
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Publication number: 20080081865Abstract: A method of preparing a polycarbonate nanocomposite comprising forming a reactant mixture comprising a nanomaterial, a solvent, a dihydroxy compound and an activated carbonate; and polymerizing the dihydroxy compound and the activated carbonate in the presence of the solvent to form the polycarbonate nanocomposite is disclosed. Also disclosed are polycarbonate nanocomposites prepared in accordance with this method, and thermoplastic compositions comprising the polycarbonate nanocomposites.Type: ApplicationFiled: September 29, 2006Publication date: April 3, 2008Inventors: Amit Biswas, Dibakar Dhara, Raja Krishnamurthy, Edward Kung, Parnasree Maiti, Roopali Rai, Vitthal Abaso Sawant, Rajashekhar Shiddappa Totad, Sandeep Tyagi
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Publication number: 20070135570Abstract: A thermoplastic composition comprising a polycarbonate, an impact modifier, an aromatic vinyl copolymer, and a functional copolymer has excellent mechanical properties, in addition to suitable low gloss performance. An article may be formed by molding, extruding, shaping or forming such a composition to form the article.Type: ApplicationFiled: December 14, 2005Publication date: June 14, 2007Applicant: General Electric CompanyInventors: Raja Krishnamurthy, Rajashekhar Totad, Sandeep Tyagi
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Publication number: 20070135589Abstract: A thermoplastic composition comprising a polycarbonate, an impact modifier, an aromatic vinyl copolymer, and a polyorganosiloxane has excellent mechanical properties, in addition to suitable low gloss performance. An article may be formed by molding, extruding, shaping or forming such a composition to form the article.Type: ApplicationFiled: December 14, 2005Publication date: June 14, 2007Applicant: General Electric CompanyInventors: James DeRudder, Raja Krishnamurthy, Rajashekhar Totad, Sandeep Tyagi, Robert Venderbosch
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Publication number: 20060142455Abstract: A polymer composition is disclosed, which comprises a matrix polymer, a fluoropolymer that may be at least partially encapsulated by an encapsulating polymer, and a filler. Methods for making the polymer compositions and articles made of such compositions are also disclosed. The compositions and article can have improved tensile modulus, ductility, and/or impact properties.Type: ApplicationFiled: December 23, 2004Publication date: June 29, 2006Inventors: Naveen Agarwal, Satish Gaggar, Deval Gupta, Samik Gupta, Raja Krishnamurthy, Nisha Preschilla, Rajashekhar Totad, Sandeep Tyagi
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Publication number: 20050143508Abstract: A thermoplastic resin composition is disclosed which comprises a matrix polymer, and a combination of a fluoropolymer that can be at least partially encapsulated by an encapsulating polymer, and a filler. Methods for making the thermoplastic resin composition and articles made of such compositions are also disclosed. The composition and article can have improved tensile modulus, ductility and impact properties.Type: ApplicationFiled: December 30, 2003Publication date: June 30, 2005Inventors: Sandeep Tyagi, Deval Gupta, Raja Krishnamurthy, Rajashekhar Totad, Satish Gaggar