Shpp Global Technologies B.v.

Sabic Global Technolgoies B.v.

Juan J Rodriguez Ordonez

Javier Nieves Remacha

Bernabe Quevedo Sanchez

Thomas Link Guggenheim

Surya Prakasa Rao Daliparthi

Hareesh Shamrao Deshpande

Siva Kumar Sreeramagiri

Sivakumar Periyasamy

James Patrick Schulte, Ii

Sunil S Dhumal

Srinivas Mahesh Kumar

Maria Patricia Forcen Jimenez

Carmen Rocio Misiego Arpa

Jose Roman Galdamez

Hendrich A Chiong

Dadasaheb V Patil

Edward Venema

A method of making a biphenol dianhydride composition includes heating a first solution including a biphenol tetraacid of the formula (I) wherein Ra, Rb, p and q are as defined herein; at least one of sodium ions, potassium ions, calcium ions, zinc ions, aluminum ions, iron ions, phosphate ions, sulfate ions, chloride ions, nitrate ions, and nitrite ions; and a non-halogenated solvent. The N first solution is heated under conditions effective to provide a second solution including the corresponding biphenol dianhydride, the at least one of sodium ions, potassium ions, calcium ions, zinc ions, aluminum ions, iron ions, phosphate ions, sulfate ions, chloride ions, nitrate ions, and nitrite ions, and the non-halogenated solvent.

Method of making a biphenol dianhydride composition, method for purification of a biphenol dianhydride, and poly(etherimide)s derived from the biphenol dianhydride

A method for purification of a biphenol tetraacid composition includes contacting the biphenol tetraacid composition with a solvent including a C1-6 alcohol to form a slurry and isolating the purified biphenol tetraacid from the slurry. The biphenol tetraacid composition includes a biphenol tetraacid and a biphenol. A purified biphenol tetraacid composition is also described.

Method for purification of a biphenol tetraacid composition and a biphenol tetraacid composition

A polyetherimide of improved color and processes for preparing the polyetherimide are disclosed.

Process to make low color polyetherimide by halo-displacement and low color polyetherimide

A method of manufacturing an isolated polyetherimide composition includes combining an as-synthesized polyetherimide comprising units of the formula (I) and a melt-stabilizing amount of a tri(Cacyl) glyceride, an anhydride of the formula (II), or a combination comprising at least one of the foregoing, to provide a mixture; and isolating a polyetherimide composition from the mixture to provide the isolated polyetherimide composition having a change in complex viscosity measured over 30 minutes at 390&#xb0; C., at a shear rate of 6.28 rad/seconds, strain=5%, and under nitrogen, from +15 to &#x2212;20%, preferably from +10 to &#x2212;20%, more preferably from +5 to &#x2212;20%. 

Methods for the manufacture of polyetherimides and polyetherimides made by the method

A method for producing a reactive intermediate composition, including: reacting a substituted phthalic anhydride of the formula (I) with a diamine of the formula HN&#x2014;R&#x2014;NHin 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 Caromatic hydrocarbon group or a halogenated derivative thereof, a straight or branched chain Calkylene or a halogenated derivative thereof, or a Ccycloalkylene or a halogenated derivative thereof. 

Synthesis of reactive intermediates for polyetherimides, and uses thereof

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.

Method for reducing yellowness index of a polyetherimide, polyetherimide having a reduced yellowness index, and compositions and articles comprising the polyetherimide

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Cartagena, Spain

Juan J Rodriguez Ordonez