| 摘要 |
A catalyst system for the ring-opening metathesis polymerization, which consists of at least two components (a) and (b), wherein(a) is a ruthenium compound of formula I or IIwherein L1, L2, L3 and L4 are each independently of the other C1-C18alkylcyanide, C8-C24-aralkylcyanide, tertiary amine, tertiary phosphine which does not contain any secondary alkyl or cycloalkyl radicals bound to the phosphorus atom, or phosphite, X is halogen, A is arene, m, n, o and p are integers from 0 to 4, where 2<=m+n+o+p<=4, r and s are integers from 0 to 2, where 1<=r+s<=2, and(b) is a tertiary phosphine containing at least one secondary alkyl radical or cycloalkyl radical bound to the phosphorus atom,is particularly suitable for the polymerization of strained cycloolefins by the RIM process.
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