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Patent Agency Ranking
公开(公告)号：JP5604786B2
公开(公告)日：2014-10-15
申请号：JP2008551157
申请日：2007-12-27
Applicant: Jsr株式会社
CPC classification number: C08C19/44 , B60C1/0016 , B60C1/0025 , C08K3/013 , C08K3/04 , C08L7/00 , C08L9/06 , C08L15/00 , C08L21/00 , C08L2666/08
Abstract: A method for producing a modified conjugated diene polymer includes carrying out a modification reaction that reacts a modifier that includes a specific compound with a conjugated diene polymer having a cis-1,4-bond content of 98.5% or more and possessing an active end to introduce the modifier into the active end of the conjugated diene polymer to obtain a modified conjugated diene polymer. The modified conjugated diene polymer that exhibits excellent wear resistance, excellent mechanical properties, and reduced cold flow can be obtained by the method.
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公开(公告)号：JP5458576B2
公开(公告)日：2014-04-02
申请号：JP2008551156
申请日：2007-12-27
Applicant: Jsr株式会社
CPC classification number: C08C19/44 , B60C1/0016 , B60C1/0025 , B60C1/0041 , C08K3/013 , C08K3/04 , C08K3/36 , C08L7/00 , C08L9/06 , C08L15/00 , C08L21/00 , C08L2666/08
Abstract: A method for producing a modified conjugated diene polymer includes a step (A) carrying out a primary modification reaction that reacts a heterocumulene compound having two or more specific functional groups with a conjugated diene polymer having a vinyl content of below 10% and a cis-1,4-bond content of 75% or more and possessing an active end to obtain a primary-modified conjugated diene polymer, and a step (B) carrying out a secondary modification reaction that reacts an active hydrogen-containing compound that includes one or more functional groups selected from the group consisting of an amino group, an imino group, a mercapto group, and a hydroxyl group with the primary-modified conjugated diene polymer to obtain a secondary-modified conjugated diene polymer. The method can produce a modified conjugated diene polymer that exhibits low heat build-up (low fuel consumption) and excellent wear resistance.
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公开(公告)号：JP5276249B2
公开(公告)日：2013-08-28
申请号：JP2004230413
申请日：2004-08-06
Applicant: Jsr株式会社
IPC: C08F236/04 , C08F2/06 , C08F212/02 , C08F212/36
CPC classification number: Y02T10/862
Abstract: A process for producing a conjugated diene copolymer rubber which comprises initiating a copolymerization reaction in a reaction system containing a first conjugated diene compound and a first aromatic vinyl compound and completing the reaction, adding a first polyfunctional monomer to the reaction system, optionally further adding a second conjugated diene compound and a second aromatic vinyl compound, and further conducting copolymerization reaction, and adding a modifier to the reaction system to react the modifier with the copolymer. A rubber composition having excellent processability, exhibiting sufficient hardness even after vulcanization, and possessing reduced rolling resistance can be obtained.
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公开(公告)号：JP4947290B2
公开(公告)日：2012-06-06
申请号：JP2006535164
申请日：2005-09-14
Applicant: Jsr株式会社
CPC classification number: C08C19/44 , B60C1/0016 , B60C1/0025 , C08C19/25 , C08K3/013 , C08L9/00 , C08L15/00 , C08L21/00 , C08L2666/08
Abstract: There is provided a method for producing a conjugated diolefin (co)polymer rubber excellent in processability, independently of the kind and combination of filling agent incorporated, excellent in a balance among wet-skid characteristics, low hysteresis loss, wear resistance and breaking strength, when vulcanization treatment is performed to form a vulcanized rubber, and useful as a material for a tread or a sidewall member of a tire for low fuel consumption, a large sized tire or a high performance tire. A method for producing a conjugated diolefin (co)polymer rubber, which comprises polymerizing either a conjugated diolefin or a conjugated diolefin and an aromatic vinyl compound in a hydrocarbon solvent by anionic polymerization using at least one compound selected from the group consisting of an organic alkali metal and an organic alkali earth metal as an initiator, thereafter reacting a living polymer chain end thereof with a polyisocyanate compound, and then reacting a residual isocyanate group of the polyisocyanate compound bonded to the living polymer chain end with an alkoxysilane compound containing a functional group having active hydrogen; and a conjugated diolefin (co)polymer rubber obtained therefrom.
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60.发明专利
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