Patents Assigned to DuPont Polymers, Inc.
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Patent number: 11826984Abstract: Novel polyamide-metal laminates which have desirable hydrolysis resistance are provided. The laminates comprise (A) a metal, (B) a tie layer, and (C) a polyamide composition. The tie layer is formed from a composition containing (B1) a polymer containing a comonomer having at least two adjacent carboxylic acid groups and (B2) an amino-silane containing a primary amine and at least one hydroxyl group.Type: GrantFiled: November 25, 2020Date of Patent: November 28, 2023Assignee: DuPont Polymers, Inc.Inventors: Tsunao Kenmochi, Haruki Maki
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Patent number: 11760872Abstract: The disclosure generally relates to filaments and in particular, filaments for use in fused filament fabrication to prepare 3D printed articles. The filaments comprising a polymer composition, said polymer composition comprising: a) about 5 wt. % to about 60 wt. % of a thermoplastic polymer A having a melting peak temperature greater than 40° C.; b) about 95 wt. % to about 40 wt. % of a thermoplastic polymer B having a melting peak temperature greater than 20° C.; c) optionally from about 0.1 to 3 wt. % of a viscosity modifier; wherein: the melting peak temperature of thermoplastic polymer A is at least 20° C. greater than the melting peak temperature of thermoplastic polymer B; thermoplastic polymer A is dispersed in thermoplastic polymer B; and the polymer composition has a melt index of at least 0.Type: GrantFiled: October 12, 2017Date of Patent: September 19, 2023Assignee: DuPont Polymers, Inc.Inventors: Peter Anthony Fox, Steven R. Oriani
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Patent number: 11732823Abstract: Provided herein is a fluid duct 2 comprising a tubular base wall 11 surrounding a duct channel and at least one bellows 10 formed along a section of the tubular base wall 11. The bellows 10 comprises a plurality of convolutes 12 having a profile 14 projecting radially from the base wall 11. At least one convolute 12 wraps around the duct channel at a wrap-around angle ? of between 180° and 720° from a first end 22a to a second end 22b of the convolute 12, said second end 22b being offset in a flow direction F parallel to a centerline C of the duct channel by a non-zero offset distance D from the first end 22a.Type: GrantFiled: December 21, 2021Date of Patent: August 22, 2023Assignee: DuPont Polymers, Inc.Inventor: Michel C. Renaud
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Patent number: 11703159Abstract: Provided herein is a fluid duct 2 comprising a tubular base wall 11 surrounding a duct channel and at least one bellows 10 formed along a section of the tubular base wall 11. The bellows 10 comprises a plurality of convolutes 12 having a profile 14 projecting radially from the base wall 11. At least one convolute 12 wraps around the duct channel at a wrap-around angle ? of between 180° and 720° from a first end 22a to a second end 22b of the convolute 12, said second end 22b being offset in a flow direction F parallel to a centerline C of the duct channel by a non-zero offset distance D from the first end 22a.Type: GrantFiled: March 27, 2019Date of Patent: July 18, 2023Assignee: DuPont Polymers, Inc.Inventor: Michel C. Renaud
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Patent number: 11692063Abstract: The disclosure generally relates to filaments and in particular, filaments for use in fused filament fabrication to prepare 3D printed articles. The filaments may be prepared from a polymer composition comprising: A) 55 to 95 weight percent semi-aromatic copolyamide having a melting point; and B) 5 to 45 weight percent amorphous copolyamide having a melting point.Type: GrantFiled: October 12, 2017Date of Patent: July 4, 2023Assignee: DuPont Polymers, Inc.Inventor: Kai Qi
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Patent number: 11688526Abstract: Disclosed herein are electrically conductive thermoplastic polyester compositions comprising: a) at least one thermoplastic polyester; b) conductive carbon black; c) at least one ethylene copolymer based impact modifier; and d) at least one hyperbranched polyester having an acid number of about 80-340 mg KOH/g.Type: GrantFiled: August 15, 2019Date of Patent: June 27, 2023Assignee: DuPont Polymers, Inc.Inventor: Yunfeng Jiao
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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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Patent number: 11274189Abstract: Curing fluoroelastomers using curing agents of formula, R1N?CR2R3, wherein R1 is H; R2 is selected from the group consisting of H, NH2, and NR4R5; R3 is selected from the group consisting of Ph, SO2H, NR6R7, 2-pyridine, and CH2CONH2; R4 is H; R5 is selected from the group consisting of Ph, NH2, and CN; R6 is selected from the group consisting of H, NHPh, CCONH2, C1 to C8 linear alkyl group, and C1 to C8 branched alkyl group; and R7 is selected from the group consisting of Ph, COOC(CH3)3, NH2, CH2COOH, CSNH2, CNHNH3+Cl?, p-phenylCN, COPh,Type: GrantFiled: September 26, 2019Date of Patent: March 15, 2022Assignee: DuPont Polymers, Inc.Inventors: Christopher J Bish, Peter A Morken, Amiya Ratan Tripathy
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Patent number: 11174330Abstract: Fluoroelastomer compositions comprising fluoroelastomers having copolymerized units of a nitrile-containing cure site monomer are cured with certain hydrazone or oxime curatives.Type: GrantFiled: March 6, 2020Date of Patent: November 16, 2021Assignee: DUPONT POLYMERS, INC.Inventors: Amiya Ratan Tripathy, Peter A Morken, Christopher J. Bish
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Patent number: 11149887Abstract: Provided herein is a fluid duct (8) comprising a fluid duct connection end portion (12) for coupling to a component connection end portion (4) via a sealing ring (6), the fluid duct connection end portion comprising a clamping ring seat (14) configured for receiving an adjustable clamping ring therearound, the clamping ring seat (14) extending axially (A) between an entry flange (16) and a tube joining section (18), the tube joining section (18) extending into a fluid duct tube portion (10). The clamping ring seat (14) comprises an extension fold (20) configured to allow the clamping ring seat (14) to expand radially due to a widening of the expansion fold (20).Type: GrantFiled: June 18, 2018Date of Patent: October 19, 2021Assignee: DUPONT POLYMERS, INC.Inventors: Bryan Martin Morris, Alain Kim, Michel C. Renaud
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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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Patent number: 11066533Abstract: Halogen-free flame retardant compositions comprising thermoplastic elastomers, which exhibit flame retardance and low-smoke emission. The flame retardant compositions comprise (a) one or more thermoplastic elastomers; and (b) a flame retardant mixture comprising: magnesium hydroxide, aluminium trihydrate, melamine cyanurate, and optionally a phosphate ester flame retardant.Type: GrantFiled: September 29, 2015Date of Patent: July 20, 2021Assignee: DUPONT POLYMERS. INC.Inventor: Eleni Karayianni
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Patent number: 10899943Abstract: Halogen-free flame retardant compositions comprising thermoplastic vulcanizates, which exhibit desired flame retardance and low-smoke emission. These flame retardant compositions comprise a) one or more thermoplastic vulcanizates, and b) from at or about 18 to at or about 50 weight percent, the weight percentage being based on the total weight of the flame retardant composition, of a flame retardant mixture comprising: b1) at least one flame retardant comprising a phosphinate, diphosphinate and/or polymers thereof, b2) a phosphorous-containing amino composition, and b3) a zeolite.Type: GrantFiled: February 1, 2016Date of Patent: January 26, 2021Assignee: DUPONT POLYMERS, INC.Inventor: Eleni Karayianni
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Patent number: 10836893Abstract: A fluoroelastomer compound comprising at least one co-agent and at least one chemical entity comprising: (1) an azo functional group or (2) an oxazoline functional group, when cured into an article using a peroxide curing agent, the article exhibits no visible particles on the article surface when viewed at a magnification of 500 times that of an unmagnified image.Type: GrantFiled: December 7, 2015Date of Patent: November 17, 2020Assignee: DUPONT POLYMERS, INC.Inventors: Peter A. Morken, Amiya Ratan Tripathy
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Patent number: 10737543Abstract: The invention provides a vehicle suspension system, comprising a jounce bumper made of elastomeric thermoplastic material, having improved design to maximize energy absorption.Type: GrantFiled: April 23, 2018Date of Patent: August 11, 2020Assignee: DUPONT POLYMERS, INC.Inventors: Peter Laszlo Szekely, Damien Van Der Zyppe
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Patent number: 10472494Abstract: Curing fluoroelastomers using curing agents of formula, R1N?CR2R3, wherein R1 is H; R2 is selected from the group consisting of H, NH2, and NR4R5; R3 is selected from the group consisting of Ph, SO2H, NR6R7, 2-pyridine, and CH2CONH2; R4 is H; R5 is selected from the group consisting of Ph, NH2, and CN; R6 is selected from the group consisting of H, NHPh, CCONH2, C1 to C8 linear alkyl group, and C1 to C8 branched alkyl group; and R7 is selected from the group consisting of Ph, COOC(CH3)3, NH2, CH2COOH, CSNH2, CNHNH3+Cl?, p-phenylCN, COPh,Type: GrantFiled: September 26, 2015Date of Patent: November 12, 2019Assignee: DuPont Polymers, Inc.Inventors: Christopher J Bish, Peter A Morken, Amiya Ratan Tripathy
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Patent number: D1026799Type: GrantFiled: October 31, 2022Date of Patent: May 14, 2024Assignee: DuPont Polymers, Inc.Inventors: Mohammed Rezaul Karim, Karl P. Maurer