Patents by Inventor David Huabin Wang
David Huabin Wang 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: 10899068Abstract: A method for fabricating a shape memory polymer into a three-dimensional object is provided. The method includes forming a film of crosslinked poly(amic acid) on a substrate to provide a laminated substrate; forming the laminated substrate into a first configuration that is in a three-dimensional form; curing the cross-linked poly(amic acid) to provide the shape memory polymer having a permanent shape corresponding to the first configuration; and removing the substrate from the laminated substrate to provide the three-dimensional object comprising the shape memory polymer. The formation of the laminated substrate into the three-dimensional object may be based on origami techniques.Type: GrantFiled: January 28, 2019Date of Patent: January 26, 2021Assignee: United States of America as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, David Huabin Wang
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Poly(2,6-dimethyl-1,4-phenylene-oxide) derivatives with sulfonyl pendant groups and methods therefor
Patent number: 10731000Abstract: A sulfonyl-substituted polyphenylene-ether polymer having improved dielectric properties and methods for making the same. The sulfonyl-substituted PPE include sulfone-containing polyphenylene oxides (“PPO”) polymers having repeating units of the formulas: wherein each of R1 and R2 is H or an alkyl group containing from 1 to 4 carbon atoms, R3 is an alkylene group containing from 1 or 2 carbon atoms, R4 is selected from a group consisting of an alkyl group containing from 1 to 4 carbon atoms, an aryl group, and CF3, and X is a halogen atom. The subscript n is 0 or 1; the subscript m is 1 or 2, provided that when m is 2, R2 is H. A degree of polymerization ranges from about 5 to about 1,000, and a ratio of units having formula (1) to units having formula (2) of the sulfone-containing PPO polymer ranges from about 10:90 to about 90:10.Type: GrantFiled: May 17, 2019Date of Patent: August 4, 2020Assignee: United States of America as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, David Huabin Wang, Lei Zhu -
Patent number: 10457780Abstract: New diamine monomers bearing sulfone terminated pendant groups, as well as methods for making the same, are provided. The diamine monomers are useful toward making polyamide, polyimide, and poly(amide-imide) polymers and copolymers, which possess hygromorphic properties and demonstrate humidity driven motility.Type: GrantFiled: March 2, 2018Date of Patent: October 29, 2019Assignee: United States of America as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, David Huabin Wang, Richard A. Vaia, Philip R Buskohl, Ruel McKenzie
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POLY(2,6-DIMETHYL-1,4-PHENYLENE-OXIDE) DERIVATIVES WITH SULFONYL PENDANT GROUPS AND METHODS THEREFOR
Publication number: 20190276603Abstract: A sulfonyl-substituted polyphenylene-ether polymer having improved dielectric properties and methods for making the same. The sulfonyl-substituted PPE include sulfone-containing polyphenylene oxides (“PPO”) polymers having repeating units of the formulas: wherein each of R1 and R2 is H or an alkyl group containing from 1 to 4 carbon atoms, R3 is an alkylene group containing from 1 or 2 carbon atoms, R4 is selected from a group consisting of an alkyl group containing from 1 to 4 carbon atoms, an aryl group, and CF3, and X is a halogen atom. The subscript n is 0 or 1; the subscript m is 1 or 2, provided that when m is 2, R2 is H. A degree of polymerization ranges from about 5 to about 1,000, and a ratio of units having formula (1) to units having formula (2) of the sulfone-containing PPO polymer ranges from about 10:90 to about 90:10.Type: ApplicationFiled: May 17, 2019Publication date: September 12, 2019Applicant: Government of the United States, as represented by the Secretary of the Air ForceInventors: Loon-Seng TAN, David Huabin WANG, Lei ZHU -
Poly(2,6-dimethyl-1,4-phenylene-oxide) derivatives with sulfonyl pendant groups and methods therefor
Patent number: 10364324Abstract: A sulfonyl-substituted polyphenylene-ether polymer having improved dielectric properties and methods for making the same. The sulfonyl-substituted PPE include sulfone-containing polyphenylene oxides (“PPO”) polymers having repeating units of the formulas: wherein each of R1 and R2 is H or an alkyl group containing from 1 to 4 carbon atoms, R3 is an alkylene group containing from 1 or 2 carbon atoms, R4 is selected from a group consisting of an alkyl group containing from 1 to 4 carbon atoms, an aryl group, and CF3, and X is a halogen atom. The subscript n is 0 or 1; the subscript m is 1 or 2, provided that when m is 2, R2 is H. A degree of polymerization ranges from about 5 to about 1,000, and a ratio of units having formula (1) to units having formula (2) of the sulfone-containing PPO polymer ranges from about 10:90 to about 90:10.Type: GrantFiled: August 17, 2017Date of Patent: July 30, 2019Assignee: The United States of Ameirca as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, David Huabin Wang, Lei Zhu -
Patent number: 10301430Abstract: Bis(azo-benzene) diamine monomers and a method of synthesizing the monomers are provided. The bis(azo-benzene) diamine monomers, in combination with amine reactive monomers, form polymers, such as polyimides and copolyimides, having photomechanical and thermomechanical properties.Type: GrantFiled: September 26, 2017Date of Patent: May 28, 2019Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, David Huabin Wang, Jeong Jae Wie, Timothy J. White
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Patent number: 10294255Abstract: A multifunctional crosslinking agent, a crosslinked polymer, and a method of making the same are disclosed. The multifunctional crosslinking agent, which may be used to crosslink amine-terminated polyamides, polyimides, or poly(amide-imide)s, includes three or four anhydride functional groups. The multifunctional crosslinking agent may be defined by a general chemical formula (I): (Z—Ar—)n—W, wherein W represents an anhydride functional group that is directly or indirectly bonded to Ar; Ar represents an aryl group that is directly bonded to W; and n is equal to 3 when W is P?O or N, or n is equal to 4 when W is Si or a carbon moiety.Type: GrantFiled: January 28, 2016Date of Patent: May 21, 2019Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, David Huabin Wang
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Patent number: 10239254Abstract: A method for fabricating a shape memory polymer into a three-dimensional object is provided. The method includes forming a film of crosslinked poly(amic acid) on a substrate to provide a laminated substrate; forming the laminated substrate into a first configuration that is in a three-dimensional form; curing the cross-linked poly(amic acid) to provide the shape memory polymer having a permanent shape corresponding to the first configuration; and removing the substrate from the laminated substrate to provide the three-dimensional object comprising the shape memory polymer. The formation of the laminated substrate into the three-dimensional object may be based on origami techniques.Type: GrantFiled: January 28, 2016Date of Patent: March 26, 2019Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, David Huabin Wang
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POLY(2,6-DIMETHYL-1,4-PHENYLENE-OXIDE) DERIVATIVES WITH SULFONYL PENDANT GROUPS AND METHODS THEREFOR
Publication number: 20190055355Abstract: A sulfonyl-substituted polyphenylene-ether polymer having improved dielectric properties and methods for making the same. The sulfonyl-substituted PPE include sulfone-containing polyphenylene oxides (“PPO”) polymers having repeating units of the formulas: wherein each of R1 and R2 is H or an alkyl group containing from 1 to 4 carbon atoms, R3 is an alkylene group containing from 1 or 2 carbon atoms, R4 is selected from a group consisting of an alkyl group containing from 1 to 4 carbon atoms, an aryl group, and CF3, and X is a halogen atom. The subscript n is 0 or 1; the subscript m is 1 or 2, provided that when m is 2, R2 is H. A degree of polymerization ranges from about 5 to about 1,000, and a ratio of units having formula (1) to units having formula (2) of the sulfone-containing PPO polymer ranges from about 10:90 to about 90:10.Type: ApplicationFiled: August 17, 2017Publication date: February 21, 2019Applicant: Government of the United States, as represented by the Secretary of the Air ForceInventors: Loon-Seng TAN, David Huabin WANG, Lei ZHU -
Publication number: 20180194898Abstract: New diamine monomers bearing sulfone terminated pendant groups, as well as methods for making the same, are provided. The diamine monomers are useful toward making polyamide, polyimide, and poly(amide-imide) polymers and copolymers, which possess hygromorphic properties and demonstrate humidity driven motility.Type: ApplicationFiled: March 2, 2018Publication date: July 12, 2018Applicant: Government of the United States, as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, David Huabin Wang, Richard A. Vaia, Philip R. Buskohl, Ruel McKenzie
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Patent number: 9932445Abstract: New diamine monomers bearing sulfone terminated pendant groups, as well as methods for making the same, are provided. The diamine monomers are useful toward making polyamide, polyimide, and poly(amide-imide) polymers and copolymers, which possess hygromorphic properties and demonstrate humidity driven motility.Type: GrantFiled: March 22, 2016Date of Patent: April 3, 2018Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, David Huabin Wang, Richard A. Vaia
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Patent number: 9896545Abstract: Bis(azo-benzene) diamine monomers and a method of synthesizing the monomers are provided. The bis(azo-benzene) diamine monomers, in combination with amine reactive monomers, form polymers, such as polyimides and copolyimides, having photomechanical and thermomechanical properties.Type: GrantFiled: May 2, 2017Date of Patent: February 20, 2018Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, David Huabin Wang, Jeong Jae Wie, Timothy J. White
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Publication number: 20180022872Abstract: Bis(azo-benzene) diamine monomers and a method of synthesizing the monomers are provided. The bis(azo-benzene) diamine monomers, in combination with amine reactive monomers, form polymers, such as polyimides and copolyimides, having photomechanical and thermomechanical properties.Type: ApplicationFiled: September 26, 2017Publication date: January 25, 2018Applicant: Government of the United States, as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, David Huabin Wang, Jeong Jae Wie, Timothy J. White
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Patent number: 9834644Abstract: Compositions of azobenzene-containing, photomechanically active, copoly(amic acids) and linear copolyimides including an azobenzenediamine, a rigid dianhydride, and a flexible dianhydride are provided; and methods of making the same.Type: GrantFiled: May 28, 2015Date of Patent: December 5, 2017Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, David Huabin Wang, Kyung Min Lee, Timothy J. White
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Publication number: 20170260334Abstract: New diamine monomers bearing sulfone terminated pendant groups, as well as methods for making the same, are provided. The diamine monomers are useful toward making polyamide, polyimide, and poly(amide-imide) polymers and copolymers, which possess hygromorphic properties and demonstrate humidity driven motility.Type: ApplicationFiled: March 22, 2016Publication date: September 14, 2017Inventors: Loon-Seng Tan, David Huabin Wang, Richard A. Vaia
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Publication number: 20170233529Abstract: Bis(azo-benzene) diamine monomers and a method of synthesizing the monomers are provided. The bis(azo-benzene) diamine monomers, in combination with amine reactive monomers, form polymers, such as polyimides and copolyimides, having photomechanical and thermomechanical properties.Type: ApplicationFiled: May 2, 2017Publication date: August 17, 2017Applicant: Government of the United States, as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, David Huabin Wang, Jeong Jae Wie, Timothy J. White
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Patent number: 9644071Abstract: Bis(azo-benzene) diamine monomers and a method of synthesizing the monomers are provided. The bis(azo-benzene) diamine monomers, in combination with amine reactive monomers, form polymers, such as polyimides and copolyimides, having photomechanical and thermomechanical properties.Type: GrantFiled: September 4, 2015Date of Patent: May 9, 2017Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, David Huabin Wang, Jeong Jae Wie, Timothy J. White
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Patent number: 9255065Abstract: Photo-active cross-linkers derived from a tris(azobenzene)-containing compound with the following generic structure: wherein for meta-azo substitution, R is equal to H, and for para-azo substitution, R is selected from the group consisting of H, F, Cl, CF3, and CH3.Type: GrantFiled: April 19, 2013Date of Patent: February 9, 2016Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, David Huabin Wang
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Patent number: 9216949Abstract: Ketoxime- and amide-functionalized nanomaterials. The nanomaterials including a nanomaterial comprising a carbon nanotube or a carbon nanofiber. At least one ketoxime group coupled to a first location on the nanomaterial, and at least one amide group coupled to a second location on the nanomaterial.Type: GrantFiled: July 2, 2013Date of Patent: December 22, 2015Assignee: THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF THE AIR FORCEInventors: Loon-Seng Tan, David Huabin Wang
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Patent number: 9139696Abstract: The present invention includes compositions and methods of preparation for symmetrical and unsymmetrical diamines containing three ether-linked benzonitrile moieties that may be used as monomers for the manufacture of a variety of functional polymers. For example, the presently disclosed multi(ether-benzonitrile) diamines may polymerize with: (i) a dianhydride to form a polyimide; (ii) a diacid chloride directly or with a dicarboxylic acid (diacid) in conjunction with a suitable promoter/catalyst combination such as triethylphosphite/pyridine to form a polyamide; and (iii) 1,2,4-benzenetricarboxylic anhydride (trimellitic anhydride), trimellitic anhydride chloride, or a diacid/diacid chloride derived from trimellitic anhydride and an aromatic diamine to form a poly(amide-imide).Type: GrantFiled: March 28, 2014Date of Patent: September 22, 2015Assignee: The United States of America, as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, David Huabin Wang