US Patent No: 6,838,526

Number of patents in Portfolio can not be more than 2000

Modified conjugated diene polymer and method of producing the same and rubber composition

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Abstract

A novel modified conjugated diene polymer is obtained by polymerizing a conjugated diene compound with a specified catalyst consisting of components (a)-(c) and then reacting with at least one specified compound selected from the group consisting of components (d)-(l), and has a content of cis-1,4-bond of not less than 85% and a ratio of weight average molecular weight to number average molecular weight of not more than 4. And also, a rubber composition comprises the modified conjugated diene polymer a rubber ingredient.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
BRIDGESTONE CORPORATIONTOKYO3232
JSR CORPORATIONTOKYO818

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akema, Hiroshi Tokyo, JP 18 92
Hattori, Iwakazu Tokyo, JP 39 554
Nakayama, Atsushi Tokyo, JP 66 178
Sone, Takuo Mie, JP 45 327
Tanaka, Ryouji Mie, JP 27 64
Tani, Kouichirou Tokyo, JP 19 51

Cited Art

Patent Info (Count) # Cites Year
 
ATOFINA CHEMICALS, INC. (1)
5,292,791 Mixture suited for crosslinking polymers, and process for crosslinking polymers with extension of the scorch time 17 1993
 
MONSANTO COMPANY (1)
4,513,110 Method of treating diene rubber and improved rubber compositions 3 1983
 
NIPPON ZEON CO., LTD. (1)
5,844,050 Modified conjugated diene polymer, process for producing same and composition comprising same 40 1996
 
SUMITOMO CHEMICAL COMPANY, LIMITED (1)
4,983,685 Methods for production of crosslinked rubber products 16 1987
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
4,446,281 Modified cis-1,4-polyisoprene rubber, a process for manufacturing the same, and a composition containing the same 8 1982

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
BRIDGESTONE CORPORATION (21)
7,723,440 Functionalized polymers and improved vulcanizates therefrom 1 2003
7,642,322 -1,4-polybutadiene prepared using novel functionalizing agents 3 2005
7,671,136 Modified polymers prepared with lanthanide-based catalysts 2 2005
7,750,087 Modified polymers prepared with lanthanide-based catalysts 2 2005
7,879,952 Functionalized polymers 1 2006
7,732,534 Polymers functionalized with nitro compounds 5 2007
7,671,138 Polymers functionized with hydrobenzamides 6 2007
8,088,868 Polymers functionalized with protected oxime compounds 0 2007
8,017,695 Method for producing functionalized cis-1,4-polydienes having high cis-1,4-linkage content and high functionality 9 2007
8,268,933 Polymers functionalized with polyimine compounds 0 2007
7,741,418 Process for producing polydienes 2 2007
8,314,189 Polymers functionalized with heterocyclic nitrile compounds 0 2008
7,906,592 Polymers functionalized with imide compounds containing a protected amino group 3 2008
8,362,156 Polymers functionalized with heterocyclic nitrile compounds 0 2008
8,188,201 Bulk polymerization process for producing polydienes 0 2008
8,188,195 Polymers functionalized with nitroso compounds 0 2008
7,825,201 Process for producing polydienes 2 2009
8,338,544 Polymers functionalized with polyoxime compounds and methods for their manufacture 0 2009
8,344,066 Polymers functionalized with nitrile compounds containing a protected amino group 0 2010
8,207,275 Functionalized polymers and improved vulcanizates therefrom 0 2010
8,426,609 Polymers functionalized with imide compounds containing a protected amino group 0 2011
 
CHANGCHUN INSTITUTE OF APPLIED CHEMISTRY CHINESE ACADEMY OF SCIENCE (1)
8,394,901 Bi-component catalyst system for isoprene or butadiene cis 1, 4-polymerization and polymerization process 0 2009
 
JSR CORPORATION (1)
8,404,785 Method for producing modified conjugated diene polymer, modified conjugated diene polymer, and rubber composition 0 2007
 
LANXESS DEUTSCHLAND GMBH (1)
7,241,841 Hydrogenated copolymers of unsubstituted and substituted conjugated dienes 0 2005
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (2)
8,362,126 -1,4-polybutadiene prepared using novel functionalizing agents 0 2009
7,977,437 Process for producing polydienes 0 2010

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