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    Methods of manufacture for polyetherimide
    1.
    发明授权
    Methods of manufacture for polyetherimide 有权

    公开(公告)号：US11692062B2

    公开(公告)日：2023-07-04

    申请号：US16469336

    申请日：2017-12-28

    申请人： SABIC GLOBAL TECHNOLOGIES B.V.

    发明人： Dadasaheb V. Patil ,  Matthew L. Kuhlman ,  Peter Johnson

    IPC分类号： C08G65/40 ,  C08G73/10 ,  C08L79/08

    CPC分类号： C08G65/4093 ,  C08G65/4006 ,  C08G73/10 ,  C08G73/1003 ,  C08G73/1042 ,  C08G73/1046 ,  C08G73/1064 ,  C08G73/1071 ,  C08L79/08

    摘要： A method of making polyetherimide comprising reacting a first diamine having four bonds between the amine groups, a second diamine having greater than or equal to five bonds between the amine groups, 4-halophthalic anhydride and 3-halophthalic in the presence of a solvent and a polymer additive to produce a mixture comprising 3,3′-bis(halophthalimide)s, 3,4′-bis(halophthalimide)s, 4,4′-bis(halophthalimide)s, solvent and the polymer additive wherein the molar ratio of 3-halophthalic anhydride to 4-halophthalic anhydride is 98:02 to 50:50 and the molar ratio of the first diamine to the second diamine is 98:02 to 02:98; and reacting the mixture with an alkali metal salt of a dihydroxy aromatic compound to produce a polyetherimide having a cyclics content less than or equal to 5 weight percent, based on the total weight of the polyetherimide, wherein the polymer additive dissolves in the solvent at the imidization reaction temperature and pressure.

    Linear and branched polyimide composition
    9.
    发明授权
    Linear and branched polyimide composition 有权

    公开(公告)号：US11377521B2

    公开(公告)日：2022-07-05

    申请号：US16472143

    申请日：2017-12-29

    申请人： SABIC GLOBAL TECHNOLOGIES B.V.

    发明人： Roy Ray Odle ,  Peter Johnson ,  Manojkumar Chellamuthu ,  Hee Won Kong ,  Timothy Edward Long

    IPC分类号： C08G73/10 ,  C08L79/08 ,  C08G73/12

    摘要： A polyimide composition includes 1 to 99 weight percent, preferably 70 to 99 weight percent, more preferably 75 to 95 weight percent of a first polyimide; and 1 to 99 weight percent, preferably 1 to 30 weight percent, more preferably 2 to 25 weight percent of a second polyimide, wherein the first polyimide and the second polyimide are different, and wherein the polyimide composition has a melt flow rate that is greater than a melt flow rate of the first polyimide and less than a melt flow rate of the second polyimide; an apparent viscosity that is less than an apparent viscosity of the first polyimide and less than an apparent viscosity of the second polyimide; and a notched Izod impact strength that is greater than a notched Izod impact strength of the first polyimide and greater than a notched Izod impact strength of the second polyimide.

    STRUCTURED ILLUMINATION OF CROSSLINKABLE POLYCARBONATE
    10.
    发明申请
    STRUCTURED ILLUMINATION OF CROSSLINKABLE POLYCARBONATE 审中-公开

    公开(公告)号：US20170184971A1

    公开(公告)日：2017-06-29

    申请号：US15320046

    申请日：2015-06-19

    申请人： SABIC GLOBAL TECHNOLOGIES B.V.

    发明人： Peter Johnson

    IPC分类号： G03F7/20 ,  G03F7/039 ,  C08G64/40 ,  G03F7/038

    CPC分类号： G03F7/2002 ,  C08G64/40 ,  G03F7/038 ,  G03F7/039

    摘要： Methods and systems for photopatterning a polycarbonate article are described. The article comprises a cross-linkable polycarbonate with a photoactive group derived from a benzophenone. The article is selectively exposed to UV radiation to cause crosslinking at exposed portions of the article. This can be done by using a photomask to shield portions that are not to be cross-linked, or by focusing light on selective portions of the article. Systems for practicing the methods include a polycarbonate article, a UV light source, and a photomask including a plurality of openings for selectively exposing the polycarbonate article to UV light.