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Patent Agency Ranking
公开(公告)号：US11433601B2
公开(公告)日：2022-09-06
申请号：US17442807
申请日：2020-03-26
Applicant: VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
Abstract: Photocurable colloid binders are provided that overcome deficiencies associated with 3D printing of high molecular weight polymers via VAT photopolymerization. Methods of additive manufacturing are also provided using the binders. The approaches described herein effectively decouple the viscosity-molecular weight relationship by synthesizing and processing photo-reactive aqueous colloids that are sequestered within a photocrosslinkable scaffold. Sequestering polymers within discrete internal phases prevents inter-particle entanglement of the polymer chains, thus ensuring low viscosity. VP of polymer colloids results in a solid green body embedded with high molecular weight polymer particles. A post-processing heated drying step allows the polymers to coalesce and further entangle, forming a semi-interpenetrating network with mechanical performance of the high molecular weight material. The resins can further include inorganic particles such as silica and other ceramics, metal particles, and the like. The coalescence can result in the particles being encapsulated in polymer, yielding unique hybrid materials with tunable properties.
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公开(公告)号：US10759900B1
公开(公告)日：2020-09-01
申请号：US16868158
申请日：2020-05-06
Inventor： Katherine V. Heifferon , Timothy E. Long , S. Richard Turner , Yong Yang , Syamal Tallury , Ting Chen , Javier Guzman
IPC: C08G63/191 , C08G63/185 , C08G63/80 , C08G63/06 , C09K19/38
Abstract: Liquid crystalline hydroquinone-3,4′-biphenyl dicarboxylate polyesters, and methods of making them. The polyesters may be melt processed at a temperature below the thermal decomposition temperature and the isotropic temperature, and may form a liquid crystalline glass phase. The polyesters may be formed by polycondensation of hydroquinone or a hydroquinone derivative with 3,4′-biphenyl dicarboxylic acid.
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公开(公告)号：US20190276592A1
公开(公告)日：2019-09-12
申请号：US16462081
申请日：2017-10-18
Inventor： Hans Eliot Edling , Haoyu Liu , Ryan J. Mondshein , Timothy E. Long , S. Richard Turner , Ting Chen
IPC: C08G63/199 , C08G63/185 , D01F6/84
Abstract: Copolyesters having improved properties based on 1,4 cyclohexanedimethanol (CHDM) or neopentyl glycol (NPG), and a diacid component containing a combination of two diacids selected from 4,4′-biphenyl dicarboxylic acid, 3,4′-biphenyl dicarboxylic acid, and terephthalic acid; methods of making the copolyesters; and shaped articles made of the copolyesters. Also, polyesters based N on biphenyl dicarboxylic acid and NPG; methods of making the polyesters; and shaped articles made of the polyesters
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公开(公告)号：US20200270396A1
公开(公告)日：2020-08-27
申请号：US16868158
申请日：2020-05-06
Inventor： Katherine V. Heifferon , Timothy E. Long , S. Richard Turner , Yong Yang , Syamal Tallury , Ting Chen , Javier Guzman
IPC: C08G63/191 , C08G63/185 , C08G63/06 , C08G63/80
Abstract: Liquid crystalline hydroquinone-3,4′-biphenyl dicarboxylate polyesters, and methods of making them. The polyesters may be melt processed at a temperature below the thermal decomposition temperature and the isotropic temperature, and may form a liquid crystalline glass phase. The polyesters may be formed by polycondensation of hydroquinone or a hydroquinone derivative with 3,4′-biphenyl dicarboxylic acid.
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公开(公告)号：US20180282475A1
公开(公告)日：2018-10-04
申请号：US15571025
申请日：2016-10-07
Inventor： Ryan J. Mondschein , Haoyu Liu , Ting Chen , Timothy E. Long , S. Richard Turner
IPC: C08G63/185 , C08G63/83 , C08G63/85 , C08J5/00 , C08J5/18
Abstract: Bibenzoate copolyesters are based on (4,4′-biphenyl dicarboxylic acid-co-3,4′-biphenyl dicarboxylic acid) as the diacid component, and on an alicyclic diol compound such as 1,4-cyclohexanedimethanol as a portion of the diol component. Copolyesters are based on 4,4′-biphenyl dicarboxylic acid, and/or 3,4′-biphenyl dicarboxylic acid as the diacid component and may include a multifunctional acid. Copolymers may optionally base an essentially amorphous morphology, high glass transition temperature, high elongation at break, and/or high melting temperature. A method to make the copolymers controls the characteristics of the copolyester selected from one or a combination of amorphous morphology or degree of crystallinity, Tg, Tm, tensile modulus, flexural modulus, elongation at break, and so on, by selecting the proportions of the 4,4′-biphenyl dicarboxylic acid or ester producing equivalent thereof, 3,4′-biphenyl dicarboxylic acid or ester producing equivalent thereof, and/or the proportion of the 1,4-cyclohexanedimethanol in the diol component.
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