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    Bibenzoate copolyesters and methods to produce them
    7.
    发明授权
    Bibenzoate copolyesters and methods to produce them 有权

    公开(公告)号：US10767005B2

    公开(公告)日：2020-09-08

    申请号：US15571025

    申请日：2016-10-07

    Applicant: ExxonMobil Chemical Patents Inc. ,  Virginia Tech Intellectual Properties, Inc.

    Inventor： Ryan J. Mondschein ,  Haoyu Liu ,  Ting Chen ,  Timothy E. Long ,  S. Richard Turner

    IPC: C08G63/185 ,  C08G63/83 ,  C08J5/00 ,  C08J5/18 ,  C08G63/85

    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.

    TEREPHTHALATE-CO-4,4-BIBENZOATE POLYESTERS
    8.
    发明申请
    TEREPHTHALATE-CO-4,4-BIBENZOATE POLYESTERS 审中-公开

    公开(公告)号：US20200262971A1

    公开(公告)日：2020-08-20

    申请号：US16061280

    申请日：2016-10-07

    Applicant: ExxonMobil Chemical Patents Inc. ,  Virginia Tech Intellectual Properties, Inc.

    Inventor： Haoyu Liu ,  Ryan J. Mondschein ,  Ting Chen ,  Timothy E. Long ,  S. Richard Turner

    IPC: C08G63/199 ,  C08G63/183 ,  C08G63/185

    Abstract: Copolyesters are based on a diacid component containing terephthalate and 4,4′-biphenyl dicarboxylate or 3,4′-biphenyl dicarboxylate, and a diol component containing an alkylene diol, e.g., ethylene glycol or NPG, and an alicyclic polyhydroxyl compound, e.g., CHDM. The copolyesters may have a glass transition temperature more than 100° C. and mechanical, thermal and/or barrier characteristics at least comparable to some commercially available copolyesters. A method to control the morphology and properties of a copolyester involves contacting diacid and diol components in the presence of a catalyst, selecting proportions of terephthalic and 4,4′-biphenyl dicarboxylic or 3,4′-biphenyl dicarboxylic acids or ester producing equivalents thereof in the diacid component, and selecting the alkylene diol and proportions of the CHDM (or other alicyclic polyhydroxyl compound) and the alkylene diol in the diol component, to obtain the desired morphology and other properties.

    Synthesis and 3D printing of photocurable colloids
    9.
    发明授权
    Synthesis and 3D printing of photocurable colloids 有权

    公开(公告)号：US12220860B2

    公开(公告)日：2025-02-11

    申请号：US17903013

    申请日：2022-09-05

    Applicant: VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.

    Inventor： Timothy E. Long ,  Viswanath Meenakshisundaram ,  Philip J. Scott ,  Christopher B. Williams

    IPC: B29C64/124 ,  B33Y10/00 ,  B33Y70/10 ,  C08K3/36 ,  C08K9/10 ,  C08L9/06

    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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