CONTINUOUS OR SEMI-CONTINUOUS FREEZE COAGULATION METHOD FOR AQUEOUS POLYMER DISPERSIONS

• Main Authors: DENGER, Marcus, VORHOLZ, Johannes, HOFFMANN, Norbert, RÜPPEL, Mona, MÜLLER, Reiner, ALBRECHT, Klaus, WEBER, Andreas, STÖRKLE, Dominic, JUNGKAMP, Melanie
• Format: Patent
• Language: English; French; German
• Published: 06.02.2019
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; 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; TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS; WORKING-UP

The present invention relates to a continuous or semi-continuous freeze coagulation process for aqueous polymer dispersions, wherein said process comprises a freezing step and a solid-liquid separation step and is further characterized in that it comprises the further step of admixing water and/or water vapor between the freezing step and the solid-liquid separation step.