Process for preparing high vinyl polbutadiene rubber

Details Process for preparing high vinyl polbutadiene rubber Process for preparing high vinyl polbutadiene rubber

1996-03-27

1997-08-05

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526180, 526181, 526335, C08F13606, C08F 448

Patent

active

056543840

ABSTRACT:
This invention reveals a process for preparing high vinyl polybutadiene rubber which comprises polymerizing 1,3-butadiene monomer with a lithium initiator at a temperature which is within the range of about 5.degree. C. to about 100.degree. in the presence of a sodium alkoxide and a polar modifier, wherein the molar ratio of the sodium alkoxide to the polar modifier is within the range of about 0.1:1 to about 10:1; and wherein the molar ratio of the sodium alkoxide to the lithium initiator is within the range of about 0.05:1 to about 10:1.

REFERENCES:
patent: 3294768 (1966-12-01), Wofford
patent: 3324191 (1967-06-01), Wofford
patent: 3331821 (1967-07-01), Strobel
patent: 3496154 (1970-02-01), Wofford
patent: 5284927 (1994-02-01), Hsu et al.
patent: 5393721 (1995-02-01), Kitamura et al.
Hsieh et al, "Alkyllithium and Alkali Metal tert-Butoxide as Polymerization Initiator," J. Poly. Sci., A-1, 7, 449-460 (1969).

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