Method for producing a multicomponent copolymer

Patent metadata

Field	Value
Publication number	US-10053530-B2
Application number	US-201515317526-A
Country	US
Kind code	B2
Filing date	Jun 3, 2015
Priority date	Jun 12, 2014
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

Provided is a method for producing a multicomponent copolymer comprising copolymerizing a conjugated diene compound, a non-conjugated olefin compound, and an aromatic vinyl compound to produce a multicomponent copolymer having a main chain consisting of an acyclic structure.

First claim

The invention claimed is:

1. A method for producing a multicomponent copolymer, comprising copolymerizing a conjugated diene compound, a non-conjugated olefin compound, and an aromatic vinyl compound in the presence of a polymerization catalyst composition including at least one complex selected from the group consisting of: a metallocene complex represented by the following general formula (I); a metallocene complex represented by the following general formula (II); and a half metallocene cation complex represented by the following general formula (III):

(in the formula (I), M represents a lanthanoid element, scandium, or yttrium; Cp R each independently represents a substituted indenyl group; R a to R f each independently represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms; L represents a neutral Lewis base; and w represents an integer of 0 to 3);

(in the formula (II), M represents a lanthanoid element, scandium, or yttrium; Cp R each independently represents a substituted indenyl group; X′ represents a hydrogen atom, a halogen atom, an alkoxide group, a thiolate group, an amide group, a silyl group, or a hydrocarbon group having 1 to 20 carbon atoms; L represents a neutral Lewis base; and w represents an integer of 0 to 3); and

(in the formula (III), M represents a lanthanoid element, scandium, or yttrium; Cp R′ each independently represents a substituted cyclopentadienyl group, a substituted indenyl group, or a substituted fluorenyl group; X represents a hydrogen atom, a halogen atom, an alkoxide group, a thiolate group, an amide group, a silyl group, or a hydrocarbon group having 1 to 20 carbon atoms; L represents a neutral Lewis base; w represents an integer of 0 to 3; and [B] − represents a non-coordinating anion) to produce a multicomponent copolymer having a main chain consisting of an acyclic structure.

2. The method for producing a multicomponent copolymer according to claim 1 , wherein Cp R′ in the general formula (III) is a substituted indenyl group, and the substituted indenyl group in the complex represented by the general formula (I), (II), or (III) has two or more substituents.

3. The method for producing a multicomponent copolymer according to claim 1 , wherein the substituted indenyl group has at least one substituent on a five-membered ring of the substituted indenyl group.

4. The method for producing a multicomponent copolymer according to claim 1 , wherein the substituted indenyl group has at least one substituent on a phenyl group.

5. The method for producing a multicomponent copolymer according to claim 1 , wherein the non-conjugated olefin compound is an acyclic non-conjugated olefin compound.

6. The method for producing a multicomponent copolymer according to claim 5 , wherein the non-conjugated olefin compound is α-olefin.

7. The method for producing a multicomponent copolymer according to claim 6 , wherein the non-conjugated olefin compound is ethylene.

8. The method for producing a multicomponent copolymer according to claim 1 , wherein the aromatic vinyl compound is styrene.

9. The method for producing a multicomponent copolymer according to claim 1 , wherein the conjugated diene compound is 1,3-butadiene.

10. The method for producing a multicomponent copolymer according to claim 1 , wherein the multicomponent copolymer produced has a 1,4 bond content of 50% or more in the total units derived from a non-conjugated diene compound in the multicomponent copolymer produced.

11. The method for producing a multicomponent copolymer according to claim 1 , wherein the method uses hexane as a solvent.

Assignees

• Bridgestone Corp

Inventors

• Oishi Shigeki
• Kaita Shojiro

Classifications

• C08F4/52

  selected from boron, aluminium, gallium, indium, thallium or rare earths (C08F4/14 takes precedence) · CPC title

• C08F236/04

  conjugated · CPC title

• C08F236/10 Primary

  with vinyl-aromatic monomers · CPC title