Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2004-01-30
2009-11-17
Wu, David (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C524S493000, C524S847000, C523S334000, C523S333000
Reexamination Certificate
active
07619028
ABSTRACT:
The present invention is to provide a diene rubber composition and a cross-linked diene rubber thereof excellent in tensile strength, wear resistance and processability, keeping compatibility of both good fuel efficiency and high gripping property, and a production method thereof. What is characterized in the composition is that the composition is comprised of 100 parts by weight of a diene rubber having a molecular weight distribution expressed in terms of the ratio of the weight-average molecular weight to the number-average molecular weight of 1.1 to 30, 20 to 200 parts by weight of silica and a cationic polymer, and that a toluene-insoluble rubber content per gram of the silica within the range from 0.2 to 1 g, and diene cross-linked rubber thereof. What is characterized in the production method is that the method comprises steps of allowing rubber latex stabilized by an anionic emulsifying agent to react with an aqueous suspension of silica containing a cationic polymer and effecting co-coagulation of rubber in the rubber latex with the silica in the aqueous suspension within a specific pH range.
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JP 2003-221402 (Aug. 2003) abstract and translation in English.
JP 2001-213971 (Aug. 2001) abstract and translation in English.
Chino Yoshihiro
Fukahori Takahiko
Karato Takeshi
Watanabe Kazutake
Yatabe Osamu
Lee Rip A.
Tokuyama Corporation
Westerman Hattori Daniels & Adrian LLP
Wu David
Zeon Corporation
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