Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1983-02-15
1985-03-05
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526340, 525 98, 525 99, C08G 1200
Patent
active
045032041
ABSTRACT:
A composition useful as a catalyst in solution polymerization comprises (1) a barium, calcium and/or strontium alcoholate, (2) an organoaluminum compound and (3) an organomagnesium compound. (2) and (3) may be used as a complex with (1). The compositions can be used to polymerize ethylenically unsaturated monomers like butadiene, butadiene and styrene, and isoprene and heterocyclic monomers like oxiranes, thiiranes, siloxanes, thiatanes and lactams. The catalyst composition can produce polybutadienes and butadiene-styrene copolymers having a trans-1,4 content as high as 90%. The non-terminating features of the polymerization of this invention permit the preparation of functionally terminated butadiene based polymers and block polymers containing sufficient amounts of trans-1,4 butadiene units to crystallize.
REFERENCES:
patent: 3953543 (1976-04-01), Futamura et al.
patent: 4080492 (1978-05-01), de Zarauz
patent: 4110525 (1978-08-01), de Zarauz
patent: 4116917 (1978-09-01), Eckert
Aggarwal Sundar L.
Bingham Robert E.
Durst Richard R.
Fabris Hubert J.
Hargis Ivan G.
Kulkosky Peter F.
Schofer Joseph L.
The General Tire & Rubber Company
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