| 摘要 |
1. A catalyst system comprising 1) an alkali metal or tetralkylammonium carboxylate having the formula (* CHEMICAL STRUCTURE *) and 2) a strontium, barium or zinc carboxylate having the formula (* CHEMICAL STRUCTURE *) wherein M represents an alkali metal or tetralkylammonium, Q represents strontium, barium or zinc and R1, R2 and R3 are the same or different and represent H or lower alkyl, cycloalkyl, phenyl or alkylphenyl and wherein the molar ratio of the alkali metal or tetralkylammonium carboxylate to the strontium, barium or zinc carboxylate is 1:1.1-10. The catalyst system is in particular useful for preparing molded objects according to the SRIM process.
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