公开(公告)号：US10377859B2

公开(公告)日：2019-08-13

申请号：US15541497

申请日：2016-01-04

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Viswanathan Kalyanaraman ,  Nitin Vilas Tople

IPC: C08G73/10 ,  C08L33/14 ,  C08J3/12 ,  C08L79/08 ,  C08L63/00

Abstract: Disclosed herein is a friable polyimide powder having a weight average molecular weight, as determined by gel permeation chromatography (GPC) using polystyrene standards, of less than or equal to 24,500 Daltons and a reactive aromatic amine end group concentration greater than or equal to 3 mole percent, wherein 90 weight percent of the powder particles are reducible to less than or equal to 75 micrometers by mechanical grinding. Also disclosed is a method of making the friable polyimide powder, a processed polyimide resulting from the friable polyimide powder and compositions comprising the processed polyimide.

公开(公告)号：US20200270398A1

公开(公告)日：2020-08-27

申请号：US16646663

申请日：2018-09-19

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Nitin Vilas Tople ,  Bernabe Quevedo Sanchez ,  Gregory L. Hemmer

IPC: C08G73/10

Abstract: A method of making a polyetherimide includes forming an intermediate polyetherimide with an anhydride-amine stoichiometry of −2 to −40 mol % and melt mixing the intermediate polyetherimide with a bis(ether anhydride) for greater than 3 minutes at a temperature 50 to 225° C. greater than the glass transition temperature of a final polyetherimide to produce the final polyetherimide.

公开(公告)号：US20180016395A1

公开(公告)日：2018-01-18

申请号：US15541497

申请日：2016-01-04

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Viswanathan Kalyanaraman ,  Nitin Vilas Tople

IPC: C08G73/10 ,  C08L33/14 ,  C08J3/12 ,  C08L79/08 ,  C08L63/00

CPC classification number: C08G73/1053 ,  C08G73/1078 ,  C08J3/12 ,  C08J2379/08 ,  C08L33/14 ,  C08L63/00 ,  C08L79/08

Abstract: Disclosed herein is a friable polyimide powder having a weight average molecular weight, as determined by gel permeation chromatography (GPC) using polystyrene standards, of less than or equal to 24,500 Daltons and a reactive aromatic amine end group concentration greater than or equal to 3 mole percent, wherein 90 weight percent of the powder particles are reducible to less than or equal to 75 micrometers by mechanical grinding. Also disclosed is a method of making the friable polyimide powder, a processed polyimide resulting from the friable polyimide powder and compositions comprising the processed polyimide.

公开(公告)号：US20200231753A1

公开(公告)日：2020-07-23

申请号：US16647780

申请日：2018-09-19

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Nitin Vilas Tople ,  Viswanathan Kalyanaraman ,  Kelly Leung ,  Thomas Link Guggenheim

IPC: C08G73/10

Abstract: A method for modifying a polyimide includes reacting a first polyimide with an amine to produce a second polyimide having an anhydride-amine stoichiometry of −2 to −40 mol % and reacting the second polyimide with a monoanhydride, a bis(anhydride), a bis(ether anhydride) or a tetracarboxylic acid to produce a final polyimide having an anhydride-amine stoichiometry of −1 to 2 mol %.

公开(公告)号：US20200216615A1

公开(公告)日：2020-07-09

申请号：US16647793

申请日：2018-09-19

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Nitin Vilas Tople ,  Bernabe Quevedo Sanchez ,  Juan Justino Rodriguez Ordonez ,  Javier Nieves Remacha ,  Yusuf Sulub

IPC: C08G73/10

Abstract: A method of making a polyetherimide includes melt mixing a composition comprising an aromatic bis(ether anhydride) and a diamine to form a polyetherimide wherein melt mixing occurs at a temperature 50 to 225° C. greater than the glass transition temperature of the polyetherimide and after the composition attains a weight average molecular weight that is greater than or equal to 20% of the weight average molecular weight of the polyetherimide melt mixing occurs at a pressure less than atmospheric pressure.

公开(公告)号：US10793675B2

公开(公告)日：2020-10-06

申请号：US16302428

申请日：2017-05-23

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Thomas Link Guggenheim ,  Nitin Vilas Tople ,  Karthik Venkataraman

IPC: C08G73/00 ,  C08G73/10

Abstract: A method of making a polyetherimide comprises: combining a bisphenol A dianhydride, p-phenylene diamine and a halogenated aromatic solvent to form a reactant solution; heating the reactant solution to a temperature of 205° C. to 330° C. at a pressure sufficient to prevent boiling to afford a reaction solution; removing water from the reaction solution; maintaining the reaction solution at a temperature of 205° C. to 330° C. and a pressure sufficient to prevent boiling for 10 minutes to 5 hours to form a product mixture comprising the polyetherimide and solvent; and isolating the polyetherimide.

公开(公告)号：US20200262977A1

公开(公告)日：2020-08-20

申请号：US16647924

申请日：2018-09-19

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Nitin Vilas Tople ,  Bernabe Quevedo Sanchez ,  Juan Justino Rodriguez Ordonez ,  Javier Nieves Remacha

IPC: C08G73/10

Abstract: A method of making a polyetherimide includes forming a monomer mixture comprising a bis(ether anhydride), a diamine and a volatile organic solvent; removing the volatile organic solvent to form a particulate solid; and melt polymerizing the particulate solid at a temperature 50 to 225° C. greater than the glass transition temperature of the polyetherimide in a single melt mixing device. The polyetherimide has an anhydride-amine stoichiometry and the standard deviation of anhydride-amine stoichiometry is less than 0.4 mol %.