Process for the preparation of polybutene-1
AssigneeStamicarbon B.V.
InventorHenricus M. J. C. Creemers
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Abstract
A process for suspension polymerizing butene-1 with 0 to about 20 mol % of at least one other .alpha.-alkene of 2 to 10 carbon atoms is disclosed, wherein the monomers are polymerized in the presence of a Ziegler coordination catalyst using isobutane as the polymerization solvent. The polymerization reaction is effected at a temperature of 20.degree.-70.degree.C. The product polybutene is obtained in the form of a suspension which is easily handled and which has high isotactic polybutene content.
Claims8
In a process for suspension polymerizing butene-1 with 0 to about 20 mole % of at least one other .alpha.-alkene of up to 10 carbon atoms in the presence of a catalytic amount of a Ziegler coordination catalyst based upon at least one transition metal compound of a metal of groups IV B, V B and VI B and at least one organo-metallic compound of a metal of groups I, II, or III in an inert solvent, the improvement comprising using isobutane as the inert polymerization solvent and conducting the polymerization at a pressure such that the isobutane is a liquid at a temperature of about 50.degree.C to about 70.degree.C to obtain the butene-1 polymer in a substantially unswollen state.
Dependencies are inferred from the claim text.