Sumitomo Chemical Company, Limited

Mana Ito

Katsunari Inagaki

Mayumi Oshima

An object of the present invention is to provide a process for producing a modified conjugated diene-based polymer suitable for preparing a polymer composition excellent in the fuel cost saving effect. The present invention provides a process for producing a modified conjugated diene-based polymer, comprising reacting a conjugated diene-based polymer having a monomer unit based on a conjugated diene compound and a monomer unit based on a compound represented by the following formula (1), with an organometallic compound, and reacting the resulting reaction product with a hydrocarbyloxysilane compound: wherein R, R, R, Rand Reach represent a hydrogen atom or an alkyl group, at least one of R, R, R, Rand Ris an alkyl group, R, Rand Reach represent a hydrogen atom or a hydrocarbyl group, Rrepresents a hydrocarbylene group, and k represents 0 or 1.

Process for producing modified conjugated diene-based polymer, modified conjugated diene-based polymer, and polymer composition

The present invention provides a process for producing a conjugated diene-based polymer comprising polymerizing a monomer component comprising a conjugated diene compound and a silicon-containing vinyl compound using the following compounds (I) and (II), as a polymerization initiator component, wherein Rand Rrepresent a hydrocarbyl group having 1 to 20 carbon atoms optionally having a substituent.

Process for producing conjugated diene-based polymer, conjugated diene-based polymer, and conjugated diene-based polymer composition

The present invention provides a process for producing a conjugated diene-based polymer, comprising polymerizing a monomer component containing a conjugated diene compound and a silicon-containing vinyl compound using a polymerization initiator represented by the following formula (1) wherein, Rrepresents a hydrocarbylene group having 6 to 100 carbon atoms, Rand Rrepresent a hydrocarbyl group optionally having a substituent, or a trihydrocarbylsilyl group, or Rand Rare bonded to represent a hydrocarbylene group optionally having, as a hetero atom, at least one kind atom selected from the atomic group consisting of a silicon atom, a nitrogen atom and an oxygen atom.

A conjugated diene polymer comprising a constitutional unit based on a conjugated diene and a constitutional unit based on a compound represented by Formula (1) below,RSi(OR)RR&#x2003;&#x2003;(1)wherein m represents 1 or 2; n represents 1 or 2; m+n=2 or 3; Rrepresents a hydrocarbyl group having a polymerizable carbon-carbon double bond; Rrepresents a hydrocarbyl group, and, when there are plural Rs, Rs each may be the same or different; Rrepresents an aryl group that may have an oxygen-containing substituent, and, when there are plural Rs, Rs each may be the same or different; and Rrepresents an alkyl group or a substituted amino group.

Conjugated diene polymer, conjugated diene polymer composition, and method for producing conjugated diene polymer

Disclosed are a conjugated diene-based polymer from which a polymer composition excellent in fuel cost-saving properties and elongation at break can be obtained, a polymer composition containing the conjugated diene-based polymer and a reinforcing agent, and a process for producing the conjugated diene-based polymer. There is provided a conjugated diene-based polymer having a conjugated diene unit, a monomer unit based on a compound represented by the following formula (1) and a monomer unit based on a compound represented by the following formula (2). wherein Rrepresents a hydrogen atom or a hydrocarbyl group, m is 0 or 1, Rrepresents a hydrocarbylene group, and X, Xand Xeach independently represent a substituted amino group, or a hydrocarbyl group optionally having a substituent, provided that at least one of X, Xand Xis a substituted amino group. wherein Rrepresents a hydrogen atom or a hydrocarbyl group, n is 0 or 1, Rrepresents a hydrocarbylene group, and A represents a substituted amino group, or a nitrogen-containing heterocyclic group.

Conjugated diene-based polymer, conjugated diene-based polymer composition, and process for producing conjugated diene-based polymer

Disclosed are a conjugated diene-based polymer from which a polymer composition excellent in fuel cost-saving properties and a tensile strength at break can be obtained. There is provided a conjugated diene-based polymer having a monomer unit based on a conjugated diene, a monomer unit based on a compound represented by the following formula (1), and a monomer unit based on a compound represented by the following formula (2), in which at least one end of the polymer is modified with the following compound (G).V-S&#x2003;&#x2003;(1)wherein Vrepresents a hydrocarbyl group having a polymerizable carbon-carbon double bond, and Srepresents a substituted silyl group.)V-A&#x2003;&#x2003;(2)wherein Vrepresents a hydrocarbyl group having a polymerizable carbon-carbon double bond, and Arepresents a substituted amino group, or a nitrogen-containing heterocyclic group.Compound (G): at least one kind of compound selected from the compound group consisting of a compound having an amino group optionally having a substituent and a carbonyl group, and a compound having an amino group optionally having a substituent and a thiocarbonyl group.

Disclosed are a conjugated diene-based polymer from which a polymer composition excellent in fuel cost-saving properties and elongation at break can be obtained, a polymer composition containing the conjugated diene-based polymer and a reinforcing agent, and a process for producing the conjugated diene-based polymer. A conjugated diene-based polymer obtained by reacting one end of a polymer having a monomer unit based on a conjugated diene, a monomer unit based on a compound represented by the following formula (1), and a monomer unit based on a compound represented by the following formula (2) with an alkoxysilane compound.V&#x2014;S&#x2003;&#x2003;(1)wherein Vrepresents a hydrocarbyl group having a polymerizable carbon-carbon double bond, and Srepresents a substituted silyl group.V-A&#x2003;&#x2003;(2)wherein Vrepresents a hydrocarbyl group having a polymerizable carbon-carbon double bond, and Arepresents a substituted amino group, or a nitrogen-containing heterocyclic group.

A conjugated diene polymer obtained by reacting one end of a conjugated diene polymer having a monomer unit based on a conjugated diene and a monomer unit based on a compound represented by Formula (1) with a compound represented by Formula (2) wherein the content of the monomer unit based on the compound represented by Formula (1) is 0.01 to 20% by weight relative to 100% by weight of the total amount of the monomer unit in the conjugated diene polymer: wherein R, R, R-R,A, m and n are as defined in the specification.

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Ichihara, Japan

Mana Ito