POLYMER PURIFICATION

• Main Authors: DAI, QIU, SHEEHAN, MICHAEL, THOMAS
• Format: Patent
• Language: English; French
• Published: 05.02.2015
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

A process for removing silicon impurities from a polymer comprising the steps of (1) dissolving said polymer in a first solvent to make a solution, (2) adding a non-solvent to said solution, and (3) contacting said solution containing said non-solvent with a mixture of acidic cation and basic anion exchange resins, for a sufficient period of time to substantially remove all of said silicon from the solution of step (2). Cette invention concerne un procédé permettant d'éliminer les impuretés de type silicium d'un polymère comprenant les étapes consistant à (1) dissoudre ledit polymère dans un premier solvant pour former une solution, (2) ajouter un non-solvant à ladite solution, et (3) mettre la solution contenant ledit non-solvant en contact avec un mélange de résines échangeuses de cations acides et d'anions basiques, pendant un laps de temps suffisant pour essentiellement éliminer tout ledit silicium de la solution de l'étape (2).