Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1973-09-10
1977-11-15
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526349, C08F11000
Patent
active
040586537
ABSTRACT:
The invention provides a process for the preparation of but-1-ene homopolymers or copolymers of but-1-ene containing up to 15% by weight of at least one other .alpha.-olefin by the stereo-specific polymerization, using a Ziegler-Natta catalyst, of but-1-ene in a homogeneous reaction mixture. By employing a homogeneous reaction mixture comprising at least 70% by weight of but-1-ene and from 1 to 30% by weight of an inert hydrocarbon solvent which is capable of dissolving at least 100 g/l of an isotactic polybutene it is possible to employ reaction temperatures of from 35.degree. to 55.degree. C., thereby improving the quality of the resulting but-1-ene polymer while avoiding precipitation of polymer during the course of the reaction.
REFERENCES:
patent: 3435017 (1969-03-01), Natta et al.
Krigbaum, W. R., et al., J. Physical Chemistry, 1961, 65, pp. 1984-1991.
Rubin, I. D., "Poly(1-Butene)," (Gordon and Breach, 1968), pp. 11, 14, 16, 19, 40, 68-71, and 99-111.
D. J. Buckley, "Butylene Polymers"-pp. 754-795 in Encyclopedia of Polymer Science & Technology, vol. 2, (1967) Interscience.
Boucheron Bernard
Gosset Emile
Clingman A. L.
Ethylene Plastique
Schofer Joseph L.
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