Patent ID: 9085653
Filing Date: 2015-07-21
Classification: B60C,C08C,C08F,C08K

Abstract:
1. A method for producing a modified conjugated diene-based polymer comprising a polymerization step of obtaining a conjugated diene-based polymer having an active end by polymerizing a conjugated diene compound, or copolymerizing conjugated diene compounds, or copolymerizing a conjugated diene compound and an aromatic vinyl compound by use of a polymerization initiator containing a compound represented by the following chemical formula (1) or (2) and having at least one nitrogen atom in a molecule and an organic lithium compound; and a modification step of reacting a modifier represented by the following chemical formula (6) with the active end of the conjugated diene-based polymer: wherein R 1 and R 2 , which may be the same or different, each represent any selected from the group consisting of an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 14 carbon atoms and an aralkyl group having 6 to 20 carbon atoms; and R wherein R 1 and R 2 are the same as defined in the formula (1); R 3 is either an alkylene group having 1 to 20 carbon atoms or a group represented by any one of formulas (3) to (5); when R 3 is an alkylene group having 1 to 20 carbon atoms, X represents any one of CI, Br and I; and when R 3 is a group represented by any one of the following formulas (3) to (5), X is a hydrogen atom: wherein R 4 to R 7 each independently represent an alkyl group having 1 to 20 carbon atoms or an aryl group having 6 to 20 carbon atoms; R 8 represents an alkylene group having 3 to 10 carbon atoms; R 9 represents an alkylene group having 1 to 20 carbon atoms; m is an integer of 1 or 2; and n is an integer of 2 or 3.