Conjugated-diene-based rubber
AssigneesZeon Corporation, Sumitomo Chemical Company, Limited, Zs Elastomers Co., Ltd.
InventorsTakuro Sakurai, Takashi Iizuka, Mana Fujii, Hisakatsu Hama
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Abstract
A conjugated diene-based rubber including a polymer block (A) containing isoprene monomer unit as the main component and a polymer block (B) containing 1,3-butadiene monomer unit as the main component, wherein at least one of the polymer block (A) and the polymer block (B) contains a unit of a vinyl compound having a functional group interactive with silica, the polymer block (A) has a weight average molecular weight (Mw) in the range of 1,000 to 30,000, and the entire conjugated diene-based rubber has a weight average molecular weight (Mw) in the range of 50,000 to 5,000,000.
Claims9
A conjugated diene-based rubber comprising a polymer block (A) containing isoprene monomer unit as the main component, and a polymer block (B) containing 1,3-butadiene monomer unit as the main component,
- wherein at least one of the polymer block (A) and the polymer block (B) contains a unit of a vinyl compound having a silicon atom-containing functional group,
- the proportion of the unit of the vinyl compound having the silicon atom-containing functional group is 0.01 to 20 wt % of the total monomer units forming the conjugated diene-based rubber, and
- the polymer block (A) has a weight average molecular weight (Mw) in the range of 1,000 to 30,000, and the entire conjugated diene-based rubber has a weight average molecular weight (Mw) in the range of 50,000 to 5,000,000.
Dependencies are inferred from the claim text.