Abstract:
A method for producing a modified conjugated diene polymer usable as a raw material of a crosslinked polymer which is used for use in tires and the like of automobiles and can enhance low fuel consumption performance of automobiles and the like is provided. A method for producing a modified conjugated diene polymer comprising a polymerization step in which a monomer including a conjugated diene compound or a monomer including a conjugated diene compound and an aromatic vinyl compound is polymerized in the presence of at least one compound selected from the group consisting of the following formulae (1) and (2) and an alkali metal compound or an alkaline earth metal compound to obtain a modified conjugated diene polymer. (In the formulae, A 1 is a hydrocarbylsilyl group in which three H's (hydrogen atoms) in a "-SiH 3 " structure are each substituted by a hydrocarbyl group, and R 1 and R 2 are hydrocarbylene groups.)
Abstract:
A method for producing a conjugated diene polymer usable as a raw material of a crosslinked polymer which is used for use in tires of automobiles and can enhance low fuel consumption performance of automobiles is provided. A method for producing a modified conjugated diene polymer comprising a polymerization step in which monomer including a conjugated diene compound or monomer including a conjugated diene compound and an aromatic vinyl compound are polymerized in the presence of at least one compound selected from the group consisting of the following formulae (1) and (2) and an alkali metal compound or an alkaline earth metal compound to obtain a modified conjugated diene polymer. (In the formulae, A 1 is a functional group which has a three-substituted hydrocarbylsilyl group; has at least one atom selected from the group consisting of N, P and S; has no active hydrogen and is bound to R 1 by any one atom of the above N, P and S. R 1 and R 2 are hydrocarbylene groups. In the formulae, R 1 , R 2 and A 1 which are each present in plurality may each be same or different.)
Abstract:
A method for producing a modified conjugated diene polymer which can be used as a raw material of a cross-linked polymer used for use in automobile tires and the like, in order to enhance low fuel consumption performance is provided. A method for producing a modified conjugated diene polymer comprising a step of polymerizing a monomer comprising a conjugated diene compound and the like in the presence of a compound represented by the following formula (1) or (2) and an alkali metal compound to obtain a conjugated diene polymer, and a step of reacting the conjugated diene polymer and a compound represented by the following formula (3) to obtain a modified conjugated diene polymer. (In the formulae, R 1 is a hydrocarbylene group. Q is, for example, -N(-A 1 )-. A 1 is a hydrocarbyl group which has no active hydrogen atom and may be substituted with an atom such as N.) (In the formula, E is, for example, a functional group which has no active hydrogen atom and is bound by an atom of N to R 4 . R 2 and R 3 are hydrocarbyl groups. R 4 is a hydrocarbylene group. n is an integer of 0 to 2.)
Abstract:
1114234A method for producing a modified conjugated diene polymer which comprises: a step wherein a conjugated diene polymer is obtained by polymerizing monomers that include a conjugated diene compound or the like in the presence of an alkali metal compound and a compound represented by general formula (1) or (2); and a step wherein a modified conjugated diene polymer is obtained by reacting the conjugated diene polymer with a compound represented by general formula (3). (In general formulae (1) and (2) R represents a hydrocarbylene group; Q represents for example N( A) ; and A represents a hydrocarbyl group that does not have an active hydrogen atom and may be substituted by an N atom or the like.) (In general formula (3) E represents for example a functional group that does not have an active hydrogen atom and is bonded to R at an N atom; each of R and R represents a hydrocarbyl group; R represents a hydrocarbylene group; and n represents an integer of 0 2.)
Abstract:
A modified conjugated diene copolymer, which is obtained by modifying a conjugated diene polymer that has been obtained by polymerizing a conjugated diene compound or by polymerizing a conjugated diene compound and an aromatic vinyl compound, is produced by a production method which comprises a first modification step wherein an unsaturated binding site in the skeleton and/or in a side chain of the conjugated diene polymer is reacted with a first compound that contains a group 4 or group 13 element of the periodic table.
Abstract:
A method for producing a modified conjugated diene polymer which can be used as a raw material of a cross-linked polymer used for use in automobile tires and the like, in order to enhance low fuel consumption performance is provided. A method for producing a modified conjugated diene polymer comprising a step of polymerizing a monomer comprising a conjugated diene compound and the like in the presence of a compound represented by the following formula (1) or (2) and an alkali metal compound to obtain a conjugated diene polymer, and a step of reacting the conjugated diene polymer and a compound represented by the following formula (3) to obtain a modified conjugated diene polymer. (In the formulae, R 1 is a hydrocarbylene group. Q is, for example, -N(-A 1 )-. A 1 is a hydrocarbyl group which has no active hydrogen atom and may be substituted with an atom such as N.) (In the formula, E is, for example, a functional group which has no active hydrogen atom and is bound by an atom of N to R 4 . R 2 and R 3 are hydrocarbyl groups. R 4 is a hydrocarbylene group. n is an integer of 0 to 2.)
Abstract:
Objects of the present invention are to provide a rubber composition that can obtain a rubber elastic body having small rolling resistance and excellent impact resilience and a method for producing the same, and to provide a tire having small rolling resistance and excellent impact resilience. The rubber composition of the present invention is obtained by kneading a conjugated diene polymer (A) having a group with bonding reactivity to silica only at one site of one molecule of the polymer, a polymer (B) having groups with bonding reactivity to silica at a plurality of sites of one molecule of the polymer, and a filler (C) containing silica.