Patents by Inventor Shailesh Ratilal Doshi
Shailesh Ratilal Doshi 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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Publication number: 20230079764Abstract: The present invention relates to a process comprising the step of melt-mixing a semi-aromatic polyamide (A) having a melting point on second heating of 295° C. or less comprising terephthalamide repeat units and a polyamide oligomer (B) comprising terephthalamide repeat units and having an amine end group concentration of less than 2000 me q/Kg and an inherent viscosity of at least 0.10, at a temperature which is greater than the melting point on first heating of both semi-aromatic polyamide (A) and polyamide oligomer (B) for a time period sufficient to produce semi-aromatic polyamide (C) having a melting point on second heating which is greater than or equal to 300° C.Type: ApplicationFiled: November 16, 2022Publication date: March 16, 2023Inventors: Ahmet Turgut Mutel, Shailesh Ratilal Doshi
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Patent number: 11505649Abstract: The present invention relates to a process comprising the step of melt-mixing a semi-aromatic polyamide (A) having a melting point on second heating of 295° C. or less comprising terephthalamide repeat units and a polyamide oligomer (B) comprising terephthalamide repeat units and having an amine end group concentration of less than 2000 me q/Kg and an inherent viscosity of at least 0.10, at a temperature which is greater than the melting point on first heating of both semi-aromatic polyamide (A) and polyamide oligomer (B) for a time period sufficient to produce semi-aromatic polyamide (C) having a melting point on second heating which is greater than or equal to 300° C.Type: GrantFiled: September 26, 2018Date of Patent: November 22, 2022Assignee: DUPONT POLYMERS, INC.Inventors: Ahmet Turgut Mutel, Shailesh Ratilal Doshi
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Publication number: 20210355323Abstract: Disclosed is a thermoplastic polymer composition of polyamide including: A) polyamide composition comprising, a) 55-90 weight percent semi-crystalline, semi-aromatic co-polyamide, and b) 10-45 weight percent aliphatic homo-polyamide; B) 5-40 weight percent of co-grafted polymeric toughener; wherein the co-grafted polymeric toughener is a co-grafted blend of polyolefins with at least two glass transition temperatures and obtained from the blend of polyolefins and a reactive monomer; C) 0-15 weight percent one or more plasticizers; D) 0-2.5 weight percent one or more antioxidants and or a heat stabilizer; E) 0 to 5 weight percent of additives selected from the group consisting of flame retardant, UV stabilizer, light stabilizer, thermal stabilizer, lubricant, colorant or the like. Further disclosed herein is a process for providing the composition and its application.Type: ApplicationFiled: July 27, 2021Publication date: November 18, 2021Inventors: SHAILESH RATILAL DOSHI, Qian Deng
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Patent number: 11104798Abstract: Disclosed is a thermoplastic polymer composition of polyamide including: A) polyamide composition comprising, a) 55-90 weight percent semi-crystalline, semi-aromatic co-polyamide, and b) 10-45 weight percent aliphatic homo-polyamide; B) 5-40 weight percent of co-grafted polymeric toughener wherein the co-grafted polymeric toughener is a co-grafted blend of polyolefins with at least two glass transition temperatures and obtained from the blend of polyolefins and a reactive monomer; C) 0-15 weight percent one or more plasticizers; D) 0-2.5 weight percent one or more antioxidants and or a heat stabilizer; E) 0 to 5 weight percent of additives selected from the group consisting of flame retardant, UV stabilizer, light stabilizer, thermal stabilizer, lubricant, colorant or the like. Further disclosed herein is a process for providing the composition and its application.Type: GrantFiled: August 31, 2015Date of Patent: August 31, 2021Assignee: DuPont Polymers, Inc.Inventors: Shailesh Ratilal Doshi, Qian Deng
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Publication number: 20200277440Abstract: The present invention relates to a process comprising the step of melt-mixing a semi-aromatic polyamide (A) having a melting point on second heating of 295° C. or less comprising terephthalamide repeat units and a polyamide oligomer (B) comprising terephthalamide repeat units and having an amine end group concentration of less than 2000 me q/Kg and an inherent viscosity of at least 0.10, at a temperature which is greater than the melting point on first heating of both semi-aromatic polyamide (A) and polyamide oligomer (B) for a time period sufficient to produce semi-aromatic polyamide (C) having a melting point on second heating which is greater than or equal to 300° C.Type: ApplicationFiled: September 26, 2018Publication date: September 3, 2020Inventors: Ahmet Turgut Mutel, Shailesh Ratilal Doshi
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Patent number: 9611387Abstract: Disclosed is a transparent thermoplastic container including a thermoplastic composition including: A) a polyamide resin including a) 10 to 40 mol % of a first repeat unit of formula (I), ?and b) 60 to 90 mol % of a second repeat unit selected from the group consisting of formula (II) —C(O)(CH2)nC(O)NH(CH2)6NH—??(II); wherein n is an integer selected from 10, 12, and 14; and the mol % of repeat units are based on the total repeat units present in the copolyamide; optionally, B) an aliphatic homopolyamide having one repeat unit selected from the group of formula (II) and C) a functional additive.Type: GrantFiled: December 6, 2013Date of Patent: April 4, 2017Assignee: E I DU PONT DE NEMOURS AND COMPANYInventor: Shailesh Ratilal Doshi
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Publication number: 20160264777Abstract: Disclosed is a thermoplastic polymer composition of polyamide including: A) polyamide composition comprising, a) 55-90 weight percent semi-crystalline, semi-aromatic co-polyamide, and b) 10-45 weight percent aliphatic homo-polyamide; B) 5-40 weight percent of co-grafted polymeric toughener wherein the co-grafted polymeric toughener is a co-grafted blend of polyolefins with at least two glass transition temperatures and obtained from the blend of polyolefins and a reactive monomer; C) 0-15 weight percent one or more plasticizers; D) 0-2.5 weight percent one or more antioxidants and or a heat stabilizer; E) 0 to 5 weight percent of additives selected from the group consisting of flame retardant, UV stabilizer, light stabilizer, thermal stabilizer, lubricant, colorant or the like. Further disclosed herein is a process for providing the composition and its application.Type: ApplicationFiled: August 31, 2015Publication date: September 15, 2016Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: SHAILESH RATILAL DOSHI, Qian Deng
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Patent number: 9221975Abstract: Disclosed is a transparent thermoplastic container including a thermoplastic composition including: A) a polyamide resin including a) 10 to 40 mol % of a first repeat unit of formula (I), ?and b) 60 to 90 mol % of a second repeat unit selected from the group consisting of formula (II) —C(O)(CH2)nC(O)NH(CH2)6NH—??(II); wherein n is an integer selected from 8; and the mol % of repeat units are based on the total repeat units present in the copolyamide; and, optionally, B) an aliphatic homopolyamide having one repeat unit selected from the group of formula (II) and C) a functional additive.Type: GrantFiled: December 6, 2013Date of Patent: December 29, 2015Assignee: E I DU PONT DE NEMOURS AND COMPANYInventor: Shailesh Ratilal Doshi
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Patent number: 9200731Abstract: Disclosed is a multi-layer tube including: A) a first layer including a first layer composition including a1) about 25 to 100 weight percent of a semi-aromatic polyamide whose repeat units consist essentially of about 60 to about 85 molar percent of repeat units of the formula —C(O)(CH2)mC(O)NH(CH2)6NH—??(I) wherein m is 8 and/or 10, and about 15 to about 40 molar percent of repeat units of the formula B) a second layer including a second layer composition including b1) 50 to 100 weight percent of poly(caprolactam); with the proviso that the first layer and second layer are in direct contact; and the weight percents are based upon the total weight of the first layer composition and the second layer composition, respectively.Type: GrantFiled: March 22, 2012Date of Patent: December 1, 2015Assignee: E I DU PONT DE NEMOURS AND COMPANYInventors: Shailesh Ratilal Doshi, H. Chul Lee
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Publication number: 20140170354Abstract: Disclosed is a transparent thermoplastic container including a thermoplastic composition including: A) a polyamide resin including a) 10 to 40 mol % of a first repeat unit of formula (I), and b) 60 to 90 mol % of a second repeat unit selected from the group consisting of formula (II) —C(O)(CH2)nC(O)NH(CH2)6NH—??(II); wherein n is an integer selected from 8; and the mol % of repeat units are based on the total repeat units present in the copolyamide; and, optionally, B) an aliphatic homopolyamide having one repeat unit selected from the group of formula (II) and C) a functional additive.Type: ApplicationFiled: December 6, 2013Publication date: June 19, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventor: SHAILESH RATILAL DOSHI
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Publication number: 20140170355Abstract: Disclosed is a transparent thermoplastic container including a thermoplastic composition including: A) a polyamide resin including a) 10 to 40 mol % of a first repeat unit of formula (I), and b) 60 to 90 mol % of a second repeat unit selected from the group consisting of formula (II) —C(O)(CH2)nC(O)NH(CH2)6NH—??(II); wherein n is an integer selected from 10, 12, and 14; and the mol % of repeat units are based on the total repeat units present in the copolyamide; optionally, B) an aliphatic homopolyamide having one repeat unit selected from the group of formula (II) and C) a functional additive,Type: ApplicationFiled: December 6, 2013Publication date: June 19, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventor: SHAILESH RATILAL DOSHI
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Patent number: 8691911Abstract: Disclosed is a melt-blended thermoplastic composition including: A) a polyamide composition including a) 55 to 90 weight percent semi-crystalline semi-aromatic copolyamide; wherein the semi-aromatic copolyamide has a DMA tan delta peak value of greater than or equal to 0.23; and heat of fusion of at least 20 J/g and b) 10 to 45 weight percent aliphatic homopolyamide; wherein the aliphatic homopolyamide has a DMA tan delta peak value of less than or equal to 0.21; and heat of fusion of at least 30 J/g; B) 0 to 45 weight percent polymeric toughener; C) 0 to 20 weight percent plasticizer; and D) 0 to 45 weight percent reinforcing agent; wherein said melt-blend composition has a glass transition and has a tan delta peak (E?/E?) value of 0.21 or lower at said glass transition. Further disclosed herein is a method for providing the melt-blended thermoplastic composition.Type: GrantFiled: January 25, 2012Date of Patent: April 8, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Shailesh Ratilal Doshi, Anna Kutty Mathew
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Publication number: 20140065338Abstract: Disclosed is a monolayer tube comprising a melt-blended thermoplastic composition consisting essentially of (A) a polyamide resin selected from the group consisting of PA 614, PA 616, PA 618 and blends of these; and optionally: (B) one or more polymeric toughener(s); (C) one or more plasticizer(s); and (D) one or more functional additive(s); wherein the weight percent of (A), (B), (C), and (D) are based on the total weight of the melt-blended thermoplastic composition.Type: ApplicationFiled: August 28, 2012Publication date: March 6, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: SHAILESH RATILAL DOSHI, Marvin M. Martens, Anna Kutty Mathew, Georgios Topoulos
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Publication number: 20140017432Abstract: The present invention relates to the field of multilayer structures that are particularly suitable for conveying fuels. The multilayer structure comprises a) a polyamide layer made of a polyamide composition comprising one or more semi-aromatic copolyamides and b) a barrier layer made of ethylene vinyl alcohol copolymers (EVOH), wherein the polyamide layer is directly adhered to the barrier layer.Type: ApplicationFiled: September 13, 2013Publication date: January 16, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventor: SHAILESH RATILAL DOSHI
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Patent number: 8349932Abstract: Disclosed is a polyamide composition including at least one semi-aromatic copolyamide, said semi-aromatic copolyamide consisting essentially of about 25 to about 55 mole percent repeat units of the formula —C(O)(CH2)mC(O)NHCH2ArCH2NH—??(I) and about 45 to about 75 mole percent repeat units of the formula —C(O)(CH2)mC(O)NH(CH2)nNH—??(II) wherein m is 8, 10, and/or 12, n is 6, 10 and/or 12 and Ar is a meta-substituted benzene ring; and said polyamide has a melting point equal to or less than 225° C.; and 0.25 to 20 weight percent of one or more polyhydroxy polymer(s) having a number average molecular weight of at least 2000 and selected from the group consisting of ethylene/vinyl alcohol copolymer and poly(vinyl alcohol). Also disclosed are molded or extruded articles including the polyamide composition.Type: GrantFiled: January 28, 2011Date of Patent: January 8, 2013Assignee: E I du Pont de Nemours and CompanyInventors: Shailesh Ratilal Doshi, Annakutty Mathew, Marvin M. Martens
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Publication number: 20120279605Abstract: Polyamide compositions suitable for the inner layer of multi-layer tubular articles for circulating a heat transfer fluid composition within a refrigeration or air conditioning system are provided and including articles prepared from these compositions. Such compositions are particularly suitable in air conditioning and refrigeration applications and systems in which new, low global warming potential refrigerant alternatives are used.Type: ApplicationFiled: May 3, 2012Publication date: November 8, 2012Applicant: E.I. Du Pont De Nemours And CompanyInventors: Masahiro Nozaki, Shailesh Ratilal Doshi
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Publication number: 20120247602Abstract: Disclosed is a multi-layer tube including: A) a first layer including a first layer composition including a1) about 25 to 100 weight percent of a semi-aromatic polyamide whose repeat units consist essentially of about 60 to about 85 molar percent of repeat units of the formula —C(O)(CH2)mC(O)NH(CH2)6NH—??(I) wherein m is 8 and/or 10, and about 15 to about 40 molar percent of repeat units of the formula B) a second layer including a second layer composition including b1) 50 to 100 weight percent of poly(caprolactam); with the proviso that the first layer and second layer are in direct contact; and the weight percents are based upon the total weight of the first layer composition and the second layer composition, respectively.Type: ApplicationFiled: March 22, 2012Publication date: October 4, 2012Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventors: SHAILESH RATILAL DOSHI, H. CHUL LEE
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Publication number: 20120196973Abstract: Disclosed is a melt-blended thermoplastic composition including: A) a polyamide composition including a) 55 to 90 weight percent semi-crystalline semi-aromatic copolyamide; wherein the semi-aromatic copolyamide has a DMA tan delta peak value of greater than or equal to 0.23; and heat of fusion of at least 20 J/g and b) 10 to 45 weight percent aliphatic homopolyamide; wherein the aliphatic homopolyamide has a DMA tan delta peak value of less than or equal to 0.21; and heat of fusion of at least 30 J/g; B) 0 to 45 weight percent polymeric toughener; C) 0 to 20 weight percent plasticizer; and D) 0 to 45 weight percent reinforcing agent; wherein said melt-blend composition has a glass transition and has a tan delta peak (E?/E?) value of 0.21 or lower at said glass transition. Further disclosed herein is a method for providing the melt-blended thermoplastic composition.Type: ApplicationFiled: January 25, 2012Publication date: August 2, 2012Applicant: E.I.DU PONT DE NEMOURS AND COMPANYInventors: Shailesh Ratilal Doshi, Anna Kutty Mathew
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Patent number: 8232337Abstract: Disclosed is a polyamide composition including at least one semi-aromatic copolyamide, said semi-aromatic copolyamide consisting essentially of about 25 to about 55 mole percent repeat units of the formula —C(O)(CH2)mC(O)NHCH2ArCH2NH—??(I) and about 45 to about 75 mole percent repeat units of the formula —C(O)(CH2)mC(O)NH(CH2)nNH—??(II) wherein m is 8, 10, and/or 12, n is 6, 10 and/or 12 and Ar is a meta-substituted benzene ring; and said polyamide has a melting point equal to or less than 225° C.; and 0.1 to 15 weight percent of one or more polyhydric alcohols having more than two hydroxyl groups and having a number average molecular weight (Mn) of less than 2000. Also disclosed are molded or extruded articles including the polyamide composition.Type: GrantFiled: January 28, 2011Date of Patent: July 31, 2012Assignee: E I du Pont de Nemours and CompanyInventors: Shailesh Ratilal Doshi, Anna Kutty Mathew, Marvin M Martens
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Publication number: 20120029134Abstract: Disclosed is a polyamide composition including at least one semi-aromatic copolyamide, said semi-aromatic copolyamide consisting essentially of about 25 to about 55 mole percent repeat units of the formula —C(O)(CH2)mC(O)NHCH2ArCH2NH—??(I) and about 45 to about 75 mole percent repeat units of the formula —C(O)(CH2)mC(O)NH(CH2)2NH—(II) wherein m is 8, 10, and/or 12, n is 6, 10 and/or 12 and Ar is a meta-substituted benzene ring; and said polyamide has a melting point equal to or less than 225° C.; and 0.1 to 15 weight percent of one or more polyhydric alcohols having more than two hydroxyl groups and having a number average molecular weight (Mn) of less than 2000. Also disclosed are molded or extruded articles including the polyamide composition.Type: ApplicationFiled: January 28, 2011Publication date: February 2, 2012Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: SHAILESH RATILAL DOSHI, Annakutty Mathew, Marvin M. Martens