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AssigneeAsahi Kasei Chemicals Corporation
InventorsShinichi Sekikawa, Junichi Yoshida, Takaaki Matsuda
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A method for producing a modified conjugated diene-based polymer having a good balance between the hysteresis loss properties and the wet skid resistance, practically sufficient abrasion resistance and breaking strength, and high processability when formed into a vulcanized product is provided. A method for producing a modified conjugated diene-based polymer, comprising: a polymerization step of polymerizing a conjugated diene compound, copolymerizing conjugated diene compounds, or copolymerizing a conjugated diene compound with an aromatic vinyl compound using an alkali metal compound or an alkaline earth metal compound as a polymerization initiator to obtain a conjugated diene-based polymer having an active end, and a modifying step of reacting a compound represented by following formula (1) with the active end of the conjugated diene-based copolymer.
1-3. (canceled)
A modified conjugated diene-based polymer which comprises two silyl groups having an alkoxy group bonded thereto and which comprises a functional group including a secondary amino group within a molecule, wherein a degree of modification is not less than 50% by mass, the degree of modification being determined by an amount to be adsorbed to a column filled with silica particles by gel permeation chromatography (GPC) measurement using the column.
(canceled)
Dependencies are inferred from the claim text.