HIGH-MOONEY-VALUE NDBR

• Main Authors: LE-SATTLER, ALICIA, HARDY, DAVE, ZHANG, YAN, GROSS, THOMAS, LUCASSEN, ALEX, KLOPPENBURG, HEIKE
• Format: Patent
• Language: English
• Published: 26.09.2018
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; 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

THE INVENTION RELATES TO METHODS FOR ACHIEVING A STEP INCREASE IN THE MOONEY VISCOSITY IN PRODUCTION OF HIGH-MOLECULAR-WEIGHT POLYBUTADIENE HAVING > 95% BY WEIGHT CONTENT OF CIS-1,4 UNITS AND < 1% BY WEIGHT 1,2-VINYL CONTENT, CHARACTERIZED IN THAT 1) AT LEAST ONE MONOMER SELECTED FROM BUTADIENE AND/OR ISOPRENE IS POLYMERIZED AT TEMPERATURES OF FROM -20°C TO 150°C IN THE PRESENCE OF AT LEAST ONE INERT, ORGANIC SOLVENT AND IN THE PRESENCE OF AT LEAST ONE CATALYST BASED ON NEODYMIUM CARBOXYLATE, 2) THE POLYMERIZATION IS THEN TERMINATED BY ADDITION OF PROTIC COMPOUNDS AND 3) THEN SULPHUR CHLORIDES ARE ADDED TO THE POLYMER, AND PRIOR TO ADDITION THESE SULPHUR CHLORIDES ARE TREATED WITH A CARBOXYLIC ACID, FATTY ACID AND/OR FATTY ACID ESTER.