US 12,606,583 B2 · Iron bipyridine complex, preparation method of the same, and use of the same in polymerization of conjugated dienes

Abstract

The invention discloses an iron bipyridine complex, a preparation method of the same, and use of the same in polymerization of conjugated dienes the invention provides an iron bipyridine complex, which is used as a primary catalyst showing high activity in the polymerization of polyprene to obtain a polymer with a high branched-chain degree. The polymer has the characteristics of a high molecular weight and narrow molecular weight distribution, and the molecular weight of the polymer can be adjusted by a chain transfer reagent. The obtained poly(conjugated diene) rubber has high branched-chain content and an ultrahigh molecular weight. Because there are a large number of side groups on the molecular chains of the rubber, the rubber is mainly used for preparing high-performance tires and other related rubber products with good wet traction and low friction-induced heat generation.

Claims15

Dependent claims

A method for polymerizing the conjugated dienes comprising the following method:

under an inert gas atmosphere a solvent and a conjugated diene monomer are sequentially added into a reactor and stirred, then added with a catalyst system premix, polymerized at a constant temperature of −40° C.-50° C. for 10 min-720 min, added with a quencher and an antiaging agent after the reaction is finished, washed with ethanol, and separated and purified to obtain a poly(conjugated diene) product;
wherein the catalyst system premix is prepared from an iron bipyridine complex and a cocatalyst or prepared from the iron bipyridine complex, a cocatalyst and a dealkylation reagent;
wherein the aniron bipyridine complex has a structural formula of any one of the following formulas:
wherein R1, R2, R3 and R4 are the same or different;
R1, R2, R3 and R4 respectively represent any one of H, CH3, phenyl, methoxy or nitro.

2 more elements

A method for polymerizing the conjugated dienes comprising the following methods:

under an inert gas atmosphere a solvent and a conjugated diene monomer are sequentially added into a reactor and stirred, then added with a catalyst system premix, polymerized at a constant temperature of −40° C.-50° C. for 10 min-720 min, added with a quencher and an antiaging agent after the reaction is finished, washed with ethanol, and separated and purified to obtain a poly(conjugated diene) product;
wherein the catalyst system premix is prepared from an iron bipyridine complex and a cocatalyst or prepared from the iron bipyridine complex, a cocatalyst and a dealkylation reagent;
wherein the aniron bipyridine complex has a structural formula of any one of the following formulas:
wherein R1, R2, R3 and R4 are the same or different;
R1, R2, R3 and R4 respectively represent any one of H, CH3, phenyl, methoxy or nitro;
and
the structural formula of the iron bipyridine complex is any one of the following formulas:

4 more elements

Dependencies are inferred from the claim text.

Iron bipyridine complex, preparation method of the same, and use of the same in polymerization of conjugated dienes

Life of this patent

Iron bipyridine complex, preparation method of the same, and use of the same in polymerization of conjugated dienes

Life of this patent

Abstract

Claims15