Patent MY-169249-A (MY)
Title: Process for the preparation of (co)polymers of conjugated dienes in the presence of a catalytic system comprising a bis-imino-pyridine complex of cobalt
Inventor: MASI FRANCESCO
Filed: 2013-12-20
Abstract: Process for the preparation of (co)polymers of conjugated dienes	which comprises polymerizing at least one conjugated diene in the presence of a catalytic system comprising at least one bis-imino-pyridine complex of cobalt having general formula (I): wherein R2 and R3, equal to or different from each other, represent a hydrogen atom; or they are selected from linear or branched C1 - C2 0 preferably C1 -C1 5 , alkyl groups, optionally halogenated, cycloalkyl groups optionally substituted, aryl groups optionally substituted; R1 and R4 , different from each other, represent a hydrogen atom; or they are selected from linear or branched C1 -C2 0 , preferably C1 -C1 5 , alkyl groups, optionally halogenated, cycloalkyl groups optionally substituted, aryl groups optionally substituted; arylalkyl groups; or R1 and R2 can be optionally bound to each other to form, together with the other atoms to which they are bound, a cycle containing from 3 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally substituted with 1 inear or branched C1 - C2 0 , preferably C1 - C 1 s , alkyl groups, said cycle optionally containing other heteroatoms such as, for example, oxygen,	sulfur, nitrogen, silicon, phosphorous, selenium; or R3 and R4, can be optionally bound to each other to form, together with the other atoms to which they are bound, a cycle containing from 3 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally substituted	with linear or branched C1 -C 2 0 , preferably C1 -C1s, alkyl groups, said cycle optionally containing other heteroatoms such as, for example, oxygen, sulfur, nitrogen, silicon,phosphorous, selenium; Rs, R6 and R7, equal to or different from each other, represent a hydrogen atom, or they are selected from linear or branched C 1 -C 2 0 , preferably C1 -C 1 s , alkyl groups, optionally halogenated, cycloalkyl groups optionally substituted;	aryl groups optionally substituted; arylalkyl groups; or Rs and R6 , can be optionally bound to each other to form, together with the other atoms to which they are bound, a cycle containing from 3 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally substituted with linear or branched C1 -C 2 0 , preferably C1 - C15 , alkyl groups, said cycle optionally containing other heteroatoms such as, for example, oxygen, sulfur, nitrogen, silicon, phosphorous, selenium; or R6 and R7 , can be optionally bound to each other to form, together with the other atoms to which they are bound, a cycle containing from 3 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally substituted with linear or branched C1 -C 2 0 , preferably C1 - C1 5 , alkyl groups, said cycle optionally containing other heteroatoms such as, for example, oxygen, sulfur, nitrogen, silicon, phosphorous, selenium; X1 and X2 , equal to or different from each other, represent a halogen atom such as, for example, chlorine, bromine, iodine; or they are selected from linear or branched C1- C2 o, preferably C1 - C15 , alkyl groups, - OCOR8 groups or - OR8 groups wherein Rs is selected from linear or branched C1 -C2 0 , preferably C1-C1s, alkyl groups.