Diene rubber, process for production thereof, rubber...

Details Diene rubber, process for production thereof, rubber... Diene rubber, process for production thereof, rubber...

2006-01-10

2006-01-10

Teskin, Fred (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S082000, C526S083000, C526S084000, C526S085000, C526S340000, C525S236000, C525S237000, C525S332500, C525S332900, C525S333200, C524S570000, C524S575000, C528S500000

Reexamination Certificate

active

06984706

ABSTRACT:
A diene rubber (A) having a weight average molecular weight (Mw) of 100,000 to 3,000,000, an Mw
umber average molecular weight (Mn) ratio of 1.30 to 2.50, and an Mw/peak top molecular weight (Mp) ratio 0.70 to 1.30. A rubber composition comprising the diene rubber (A) and a diene rubber (B) having an Mw of 2,000 to 90,0000 and/or an oil extender for rubber has good processability and can give a rubber vulcanizate having high tensile strength and good abrasion resistance. The diene rubber (A) is produced by conducting a living polymerization of diene monomer in a hydrocarbon solvent; adding a polymerization stopper to a polymerization mixture at a conversion of 5 to 98% to deactivate 10 to 90% by mole of active terminals present as of the initiation of polymerization; and finally adding a polymerization stopper to completely terminate the polymerization reaction.

REFERENCES:
patent: 5548043 (1996-08-01), Saban et al.
patent: 6191226 (2001-02-01), Matsuda et al.
patent: 282437 (1988-09-01), None
patent: 1236747 (2002-09-01), None
patent: 06 200075 (1994-07-01), None
patent: 10-158338 (1998-06-01), None
patent: 11-92509 (1999-04-01), None
patent: WO 01/10919 (2001-02-01), None

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