| 摘要 |
Stable, hydrocarbon-soluble organobarium-, organocalcium-, and organostrontium-containing polymerization initiators are prepared by reacting certain calcium, barium or strontium alkoxides with organolithium, diorganomagnesium or triorganoaluminum compounds and combinations thereof. By way of illustration, the barium alkoxides soluble in hydrocarbon or chlorinated hydrocarbon solvents are prepared by reacting a suspension of barium amide in a hydrocarbon or a chlorinated hydrocarbon solvent with stoichiometric quantities of certain alcohols, alone or in the presence of chelating tertiary di- or polyamines. Alcohols suitable for the preparation of hydrocarbon- or chlorinated hydrocarbon-soluble barium alkoxides are C4-C12 aliphatic and cycloaliphatic alcohols possessing alkyl branches at the one or two-positions, or mixtures of such alcohols. Other suitable alcohols are 2-alkoxy-1-alkanols and gamma -alkoxy-poly(ethyleneoxy)-1-ethanols.
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