CONTINUOUS PROCESS FOR THE PREPARATION OF LIVING POLYMER

• Main Authors: KOSHIRO MATSUKAWA, YOSHIKAZU IWAKI, YUTAKA HOSHINO, FUMIO SATO, KAZUO UNO, AKIRA NAKADA
• Format: Patent
• Language: English
• Published: 29.08.1972
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; THEIR PREPARATION OR CHEMICAL WORKING-UP

Conjugated diolefin polymer having a narrow molecular weight distribution and a well coincident value of an average molecular weight with the expected value calculated from a molar ratio of monomer to initiator is continuously produced by employing a tubular reactor having a plural number of monomer inlets, the initiator being passed through from one end to the other end and the monomer diluted with aliphatic or cycloaliphatic hydrocarbon being fed from the monomer inlets, at a temperature maintained between -20 DEG C and -80 DEG C.