Process for producing conjugated diene copolymer rubber

Details Process for producing conjugated diene copolymer rubber Process for producing conjugated diene copolymer rubber

2005-07-21

2008-09-23

Teskin, Fred M (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S102000, C525S105000, C525S332300, C525S370000, C526S087000

Reexamination Certificate

active

07427651

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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