Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1995-05-12
1996-09-03
Teskin, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525232, 524262, 524575, 152209R, C08L 906, C08K 336
Patent
active
055524907
ABSTRACT:
The subject invention relates to a technique for synthesizing rubbery copolymers of styrene and isoprene. These rubbery copolymers exhibit an excellent combination of properties for utilization in tire tread rubber compounds. By utilizing these styrene-isoprene rubbers in tire treads, tires having improved wet skid resistance can be built without sacrificing rolling resistance or tread wear characteristics. This invention more specifically discloses a process for the synthesis of styrene-isoprene rubbers which exhibit essentially a single glass transition temperature and which are particularly useful in tire tread rubber compounds, said process comprising copolymerizing a monomer mixture containing from about 2 weight percent to about 15 weight percent styrene monomer and from about 85 weight percent to about 98 weight percent isoprene monomer in an organic solvent in the presence of a catalyst system which is comprised of (a) a lithium initiator and (b) a modifier having the structural formula: ##STR1## wherein n represents an integer within the range of 3 to 6, wherein R represents an alkyl group containing from 1 to about 10 carbon atoms, and wherein the molar ratio of the modifier to the lithium initiator is within the range of 2:1 to 40:1.
REFERENCES:
patent: 3938574 (1976-02-01), Burmester et al.
patent: 4519430 (1985-05-01), Ahmad et al.
patent: 5317062 (1994-05-01), Rogers et al.
patent: 5336730 (1994-08-01), Sandstrom et al.
patent: 5359016 (1994-10-01), Hsu et al.
Halasa Adel F.
Hsu Wen-Liang
Hubbell Joseph K.
Sandstrom Paul H.
Verthe John J. A.
Rockhill Alvin T.
Teskin Fred
The Goodyear Tire & Rubber Company
LandOfFree
Styrene-isoprene rubber for tire tread compounds does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Styrene-isoprene rubber for tire tread compounds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Styrene-isoprene rubber for tire tread compounds will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1950738