| abstract |
A new catalyst, useful in the homo-, co- and ter-polymerization of monomers of the episulphide, vinylic, lactonic, dimethylketene and aldehyde type, is prepared by reacting a metal selected from groups IA, IIA or IIIA of the periodic system, or a hydride, alkyl or amino derivative thereof (e.g. LiBut) with a compound (e.g. OO PARALLEL PARALLEL CH3-S-(CH2)6-S-CH3) containing at least two groups selected from SO and SO2 and constituted by one or more repeating units represented by the formula: |