Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1980-08-08
1981-12-01
Levin, Stanford M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526 92, 5263404, C08F 470
Patent
active
043037690
ABSTRACT:
Substantially gel-free cis-1,4-polybutadiene is prepared by an improved process comprising adding in any order to the polymerization vessel butadiene, a cobalt catalyst, water and a solvent, provided that if the solvent is an aromatic or a chlorinated solvent at most 15 percent by weight based on the weight of butadiene is added at that stage. Thereafter is added either the entire amount of an aromatic or a chlorinated solvent, or the remainder of such a solvent if part of it was added earlier. Then an aluminum catalyst, comprised of one or more organoaluminum compounds, is added and the polymerization is carried out.
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Gippin, I. & E. C., Product Research and Development, No. 1, (Mar. 1962), pp. 32-39.
Levin Stanford M.
Shust Nestor W.
The B. F. Goodrich Company
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