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公开(公告)号：US10584211B2
公开(公告)日：2020-03-10
申请号：US16078672
申请日：2017-02-28
Applicant: SABIC Global Technologies B.V.
Abstract: A method for reducing yellowness of a polyetherimide solution, including exposing a first solution including a solvent and a polyetherimide to light under conditions effective to provide a second solution having a yellowness index that is 1 to 100 units less than the yellowness index of the first solution, as determined according to ASTM D1925. Another aspect is a method for reducing yellowness of a polyetherimide solution including acidifying a first solution including a solvent and a polyetherimide to provide a second solution having a pH less than 5 under conditions effective for the second solution to attain a yellowness index that is 1 to 30 units less than the yellowness index of the first solution, as determined according to ASTM D1925. Polyetherimides prepared according to the method, and compositions and articles including the polyetherimide are also described.
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公开(公告)号：US10584210B2
公开(公告)日：2020-03-10
申请号：US15553749
申请日：2016-02-26
Applicant: SABIC GLOBAL TECHNOLOGIES B.V.
Inventor： Thomas Guggenheim , Juan Rodriguez Ordonez , Javier Nieves Remacha , Jose Roman Galdamez Pena , Hareesh Shamrao Deshpande , Sunil S. Dhumal , Surya Prakasa Rao Daliparthi , Srinivas Mahesh Kumar , Sivakumar P. , Siva Kumar Sreeramagiri , Carmen Rocío Misiego Arpa , Carlos Sanjuan Fernandez , Bernabe Quevedo Sanchez
IPC: C08G73/10
Abstract: A method of preparing a polyetherimide and an improved polyetherimide are disclosed. Low color polyetherimides are disclosed along with process improvements which produce the reduced color of the final product polymers.
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公开(公告)号：US20190315690A1
公开(公告)日：2019-10-17
申请号：US16474256
申请日：2017-12-29
Applicant: SABIC GLOBAL TECHNOLOGIES B.V.
Inventor： Thomas Link Guggenheim , Hendrich Chiong , Bernabe Quevedo Sanchez , Carmen Rocio Misiego Arpa , Juan Justino Rodriguez Ordonez , Javier Nieves Remacha
IPC: C07D209/48 , C08G73/10
Abstract: A method for producing a reactive intermediate composition, including: reacting a substituted phthalic anhydride of the formula (I) with a diamine of the formula H2N—R—NH2 in the presence of an aromatic dianhydride in an amount of 10 to 50 mole percent based on the total moles of anhydride functionality in the reaction; wherein the reacting is conducted in an aprotic solvent in a reactor, under conditions effective to produce the reactive intermediate composition; and wherein X comprises a halogen or a nitro group, and R comprises a C6-36 aromatic hydrocarbon group or a halogenated derivative thereof, a straight or branched chain C2-20 alkylene or a halogenated derivative thereof, or a C3-8 cycloalkylene or a halogenated derivative thereof.
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公开(公告)号：US20190048142A1
公开(公告)日：2019-02-14
申请号：US16078672
申请日：2017-02-28
Applicant: SABIC Global Technologies B.V.
CPC classification number: C08G73/1053 , C08G73/10 , C08G73/1046 , C08J3/11 , C08J3/28 , C08J2379/08 , C08L79/08
Abstract: A method for reducing yellowness of a polyetherimide solution, including exposing a first solution including a solvent and a polyetherimide to light under conditions effective to provide a second solution having a yellowness index that is 1 to 100 units less than the yellowness index of the first solution, as determined according to ASTM D1925. Another aspect is a method for reducing yellowness of a polyetherimide solution including acidifying a first solution including a solvent and a polyetherimide to provide a second solution having a pH less than 5 under conditions effective for the second solution to attain a yellowness index that is 1 to 30 units less than the yellowness index of the first solution, as determined according to ASTM D1925. Polyetherimides prepared according to the method, and compositions and articles including the polyetherimide are also described.
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