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    Process for the manufacture of thermoplastic polymer particles with improved process yield
    23.
    发明授权
    Process for the manufacture of thermoplastic polymer particles with improved process yield 有权

    公开(公告)号：US10465049B2

    公开(公告)日：2019-11-05

    申请号：US15757160

    申请日：2016-09-02

    Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

    Inventor： Viswanathan Kalyanaraman

    IPC: C08J3/14 ,  C08J3/12

    Abstract: A process for the manufacture of thermoplastic polymer particles, including combining a first solution including a thermoplastic polymer and an organic solvent with a second solution including an aqueous solvent and a surfactant to provide an emulsion. The emulsion is transferred into a receiving water to remove the organic solvent and form an aqueous dispersion including a plurality of thermoplastic polymer particles dispersed in the aqueous solvent. The thermoplastic polymer particles having a D50 of 20 to 100 μm are recovered in a yield of greater than 85%. Thermoplastic polymer particles prepared according to the method are also disclosed.

    METHOD OF PREPARING POLYMER PARTICLES AND POLYMER PARTICLES PREPARED THEREBY
    24.
    发明申请
    METHOD OF PREPARING POLYMER PARTICLES AND POLYMER PARTICLES PREPARED THEREBY 审中-公开

    公开(公告)号：US20190248964A1

    公开(公告)日：2019-08-15

    申请号：US16342026

    申请日：2017-10-20

    Applicant: SABIC Global Technologies B.V.

    Inventor： Viswanathan Kalyanaraman ,  Thomas Link Guggenheim

    IPC: C08J3/14 ,  C08G73/10 ,  C08J3/11

    CPC classification number: C08J3/14 ,  C08G73/1071 ,  C08G2250/00 ,  C08J3/11 ,  C08J2379/08

    Abstract: A method of preparing polymer particles includes combining a polyetherimide and a solvent at a first temperature to provide a slurry, wherein the polyetherimide is not soluble in the solvent at the first temperature; heating the slurry to a second temperature and at a pressure effective to dissolve the polyetherimide in the solvent to provide a homogenous solution; cooling the homogenous solution to a third temperature to provide a dispersion including a plurality of polymer particles; and isolating the polymer particles. The polymer particles have a Dv90 particle size of less than or equal to 250 micrometers. Polymers powders prepared according to the method are also described herein, wherein the powder includes a plurality of semi-crystalline polymer particles having a Dv90 of less than or equal to 250 micrometers.

    Polyimide-forming compositions, methods of manufacture, and articles prepared therefrom
    26.
    发明授权
    Polyimide-forming compositions, methods of manufacture, and articles prepared therefrom 有权

    公开(公告)号：US10294329B2

    公开(公告)日：2019-05-21

    申请号：US15538820

    申请日：2015-12-22

    Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

    Inventor： Viswanathan Kalyanaraman

    IPC: C08G73/10 ,  C09D179/08 ,  B29B11/14 ,  C08J7/14 ,  C08K5/00 ,  B29K79/00

    Abstract: A polyimide-forming composition includes a particulate polyimide precursor composition having an average particle size of 0.1 to 100 micrometers wherein the polyimide precursor composition comprises a substituted or unsubstituted C4-40 bisanhydride, and a substituted or unsubstituted divalent C1-20 diamine; an aqueous carrier; and a surfactant. A method of manufacturing an article including a polyimide includes the steps of forming a preform comprising the polyimide-forming composition; and heating the preform at a temperature and for a period of time effective to imidize the polyimide precursor composition and form the polyimide. An article prepared by the method, and a layer or coating including a polyimide and a surfactant are also described.

    Polyimide-forming compositions, methods of manufacture, and articles prepared therefrom
    27.
    发明授权
    Polyimide-forming compositions, methods of manufacture, and articles prepared therefrom 有权

    公开(公告)号：US10266653B2

    公开(公告)日：2019-04-23

    申请号：US15538860

    申请日：2015-12-22

    Applicant: SABIC Global Technologies B.V.

    Inventor： Viswanathan Kalyanaraman

    IPC: C08G73/10 ,  C09D179/08

    Abstract: A polyimide-forming composition includes a polyimide prepolymer, an amine, and a solvent comprising a C1-6 alcohol. A method of manufacturing the polyimide-forming composition is disclosed. The method includes heating a substituted or unsubstituted C4-40 bisanhydride in a C1-6 alcohol to dissolve the bisanhydride, adding a substituted or unsubstituted divalent C1-20 diamine to form a polyimide prepolymer, and adding the amine in an amount effective to solubilize the polyimide prepolymer in the C1-6 alcohol, in a solution of the C1-6 alcohol and deionized water, or in deionized water. A method of manufacturing an article including a polyimide is also disclosed.

    COMPOSITE ARTICLE FROM REACTIVE PRECURSOR MATERIAL
    28.
    发明申请
    COMPOSITE ARTICLE FROM REACTIVE PRECURSOR MATERIAL 审中-公开

    公开(公告)号：US20190100623A1

    公开(公告)日：2019-04-04

    申请号：US16086979

    申请日：2017-03-24

    Applicant: SABIC Global Technologies B.V.

    Inventor： Eddie Kebin Geng ,  Peter James Zuber ,  Viswanathan Kalyanaraman ,  Erich otto Teutsch

    IPC: C08G73/10 ,  C08J5/04

    Abstract: A method comprises preparing or receiving a polyetherimide precursor solution including (i) a solvent comprising water, aliphatic alcohol, or a mixture thereof; (ii) an amine additive comprising a secondary or tertiary amine; and (iii) a polyetherimide precursor dissolved and dissociated in the solvent. The method further comprises at least partially coating or impregnating one or more reinforcement structures with the polyetherimide precursor solution and polymerizing the one or more polyetherimide precursor reagents to form a polyetherimide matrix such that the one or more reinforcement structures are at least partially embedded in the polyetherimide matrix to provide a composite article.

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