Patents by Inventor Xiyun Serene Fan
Xiyun Serene Fan 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: 8691917Abstract: Compositions comprising ionomers and imidized acrylic resins are disclosed. Articles prepared from the compositions exhibit improved heat resistance properties such as increased Vicat temperature, increased stiffness/modulus at room temperature and elevated temperatures below the ionomer's melting point, and increased upper use temperature at a given stiffness over those of ionomers alone.Type: GrantFiled: October 8, 2010Date of Patent: April 8, 2014Assignee: E I du Pont de Nemours and CompanyInventor: Xiyun Serene Fan
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Publication number: 20130147085Abstract: Disclosed is an extrusion process for improving heat extortion temperature of a PVC in which the process is a one-step process comprising introducing an imidized acrylic resin and an ethylene copolymer into a back feeding device of an extruder; feeding a PVC resin into the extruder; producing a mixture comprising the imidized acrylic resin, the ethylene copolymer, and the PVC resin; extruding the mixture through a die to an extrudate; and optionally pelletizing the extrudate into pellets wherein the location for feeding the PVC is at about ¼ to ¾ of the length of the extruder, measured from the die.Type: ApplicationFiled: December 9, 2011Publication date: June 13, 2013Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventors: Xiyun Serene Fan, Michael Joseph Molitor
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Publication number: 20130137811Abstract: Described herein are compositions comprising (a) 92 to 99 weight percent, of polyoxymethylene with number average molecular weight from 65,000 to 250,000 g/mole; and (b) 1 to 8 weight percent of an imidized acrylic resin obtained by treating an acrylic polymer with a monoalkyl amine, wherein the weight percents of a and b are based on their combined weight, and monoalkyl group has from one to five carbon atoms, the degree of imidization is 20% to 100% and the acid level is from 0 to about 2 weight percent of the imidized acrylic resin. The composition has significantly higher heat deflection temperature than the neat polyoxymethylene. Processes of increasing heat deflection temperature of POM compositions described herein by blending (a) and (b), wherein the resultant melt-mixed composition has a 200% increase or greater in time to 5% creep strain relative to the same melt-mixed composition lacking (b).Type: ApplicationFiled: November 29, 2011Publication date: May 30, 2013Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Xiyun Serene Fan, Ramabhadra Ratnagiri
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Publication number: 20130136881Abstract: Described herein are compositions comprising (a) 92 to 99 weight percent, of polyoxymethylene with number average molecular weight from 65,000 to 250,000 g/mole; and (b) 1 to 8 weight percent of an imidized acrylic resin obtained by treating an acrylic polymer with a monoalkyl amine, wherein the weight percents of a and b are based on their combined weight, and monoalkyl group has from one to five carbon atoms, the degree of imidization is 20% to 100% and the acid level is from 0 to about 2 weight percent of the imidized acrylic resin. The composition has significantly higher heat deflection temperature than the neat polyoxymethylene. Processes of increasing heat deflection temperature of POM compositions are described herein by blending (a) and (b), wherein the resultant melt-mixed composition has a 200% increase or greater in time to 5% creep strain relative to the same melt-mixed composition lacking (b).Type: ApplicationFiled: November 29, 2011Publication date: May 30, 2013Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Xiyun Serene Fan, Ramabhadra Ratnagiri
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Patent number: 8445089Abstract: Described herein are compositions comprising (a) 92 to 99 weight percent, of polyoxymethylene with number average molecular weight from 65,000 to 250,000 g/mole; and (b) 1 to 8 weight percent of an imidized acrylic resin obtained by treating an acrylic polymer with a monoalkyl amine, wherein the weight percents of a and b are based on their combined weight, and monoalkyl group has from one to five carbon atoms, the degree of imidization is 20% to 100% and the acid level is from 0 to about 2 weight percent of the imidized acrylic resin. The composition has significantly higher heat deflection temperature than the neat polyoxymethylene. Processes of increasing heat deflection temperature of POM compositions are described herein by blending (a) and (b), wherein the resultant melt-mixed composition has a 200% increase or greater in time to 5% creep strain relative to the same melt-mixed composition lacking (b).Type: GrantFiled: November 29, 2011Date of Patent: May 21, 2013Assignee: E I du Pont de Nemours and CompanyInventors: Xiyun (Serene) Fan, Ramabhadra Ratnagiri
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Patent number: 8304495Abstract: An article and process for using the article under a high temperature and high humidity condition are disclosed. The article comprises or is produced from polyester, at least one ethylene copolymer, and optionally an additive and includes one or more automobile parts and electronic or electrical connectors. The process comprises employing the composition or an article in a hostile environment including a temperature of 60° C. or higher and a relative humidity of at least 60%.Type: GrantFiled: October 2, 2009Date of Patent: November 6, 2012Assignee: E I du Pont de Nemours and CompanyInventor: Xiyun Serene Fan
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Publication number: 20120088882Abstract: Compositions comprising ionomers and imidized acrylic resins are disclosed. Articles prepared from the compositions exhibit improved heat resistance properties such as increased Vicat temperature, increased stiffness/modulus at room temperature and elevated temperatures below the ionomer's melting point, and increased upper use temperature at a given stiffness over those of ionomers alone.Type: ApplicationFiled: October 8, 2010Publication date: April 12, 2012Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: XIYUN SERENE FAN
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Patent number: 7381767Abstract: Disclosed are compositions and shaped articles comprising or produced from the compositions. The compositions can comprise (a) at least one polypropylene polymer and (b) at least one E/X/Y copolymer wherein E comprises ethylene; X is a monomer such as vinyl acetate and alkyl (meth)acrylic esters; and Y is one or more additional comonomers such as carbon monoxide; sulfur dioxide; acrylonitrile; maleic anhydride; maleic acid diesters; (meth)acrylic acid, maleic acid, maleic acid monoesters, itaconic acid, fumaric acid, fumaric acid monoester, and salts thereof; glycidyl acrylate, glycidyl methacrylate, and glycidyl vinyl ether in which, based on the E/X/Y copolymer, X is from 0 to 50 weight %, Y is from 0 to 35 weight % of said, X and Y cannot both be 0%, and E is the remainder.Type: GrantFiled: September 8, 2005Date of Patent: June 3, 2008Assignee: E. I. du Pont de Nemours and CompanyInventors: Xiyun Serene Fan, Hwee Tatz Thai
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Publication number: 20070179246Abstract: An article and process for using the article under a high temperature and high humidity condition are disclosed. The article comprises or is produced from polyester, at least one ethylene copolymer, and optionally an additive and includes one or more automobile parts and electronic or electrical connectors. The process comprises employing the composition or an article in a hostile environment including a temperature of 60° C. or higher and a relative humidity of at least 60%.Type: ApplicationFiled: January 26, 2007Publication date: August 2, 2007Inventor: Xiyun Serene Fan