| 摘要 |
The use of alkaline earth metal salts of polycarboxylic acid monoesters of the general formula I
[R-(OCmH2m)n-O-CO-A(COO@)o]p M<2><+> (I> in which
R is from the group formed by straight-chain or branched C1-C22-alkyl or C3-C22-alkenyl, phenyl, alkylphenyl having 1 to 3 C1-C15-alkyl radicals, benzyl and phenethyl,
A denotes a two- or three-bonded, optionally unsaturated acyclic or cyclic hydrocarbon radical having 2 to 6 carbon atoms or a two- or three-bonded benzene radical,
M denotes an alkaline earth metal from the group formed by Ca, Ba and Sr,
m denotes the number 2 and/or 3,
n denotes a number from 1 to 20 and o denotes the number 1 and p denotes the number 2 or o denotes the number 2 and p denotes the number 1,
as catalysts for the ethoxylation or propoxylation of compounds containing active H atoms offers advantages owing to the solubility of the catalysts in the reaction medium and gives a narrow homologue distribution of the polyalkoxylation products.
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