Sabic Innovative Plastics IP B.v.

Sabic Global Technologies B.v.

Vijay Gopalakrishnan

Roy Ray Odle

Narayan Ramesh

Lioba Maria Kloppenburg

Gary William Yeager

Eric James Pressman

Norberto Silvi

Ben Purushotam Patel

David Bruce Hall

Brennan Alexander Smith

Albert Santo Stella

Beatriz Penalver Bernabe

Matt Kuhlman

Harpreet Singh

The present invention provides a process for measuring and controlling chemical reactions that produce thermoplastic polymers by utilizing a stoichiometry correction during a reaction cycle to produce thermoplastic resins with desired properties. The thermoplastic polymer is made from at least one first monomer having a first reactive end group and at least one second monomer having a second reactive end group by reaction of the first reactive end group with the second reactive end group and has a glass transition temperature of greater than 130&#xb0; C.

Process for controlling reaction stoichiometry during polymerization of thermoplastic resins

A method for purifying an oxydiphthalic anhydride comprises diluting a first mixture comprising an oxydiphthalic anhydride, a solvent, a catalyst, and an inorganic salt with a solvent, to provide a second mixture having a solids content of 10 to 30 percent based on total weight of the second mixture; filtering and washing the solids of the second mixture at a temperature below the crystallization point temperature of the oxydiphthalic anhydride to provide a third mixture; hydrolyzing the third mixture by adding water and a water-soluble acid to form a fourth mixture; heating the fourth mixture; then cooling to provide a solid-liquid mixture, optionally decanting a portion of the liquid, rediluting the remaining solid-liquid mixture, then filtering to provide a solid component; washing the solid component with water to provide a fifth mixture of oxydiphthalic tetraacid and water; ring closing the oxydiphthalic tetraacid to provide oxydiphthalic anhydride, and filtering the oxydiphthalic anhydride.

Method of purifying dianhydrides, the dianhydrides formed thereby, and polyetherimides formed therefrom

A core-shell particle including a core with poly(arylene ether) and a shell with an ethylenically unsaturated copolymer is described. Also described are a method of forming the particle, a composition including the particle, and an article including such a composition.

Core-shell particle composition, method, and article

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Evansville, IN, United States of America

Vijay Gopalakrishnan