| 摘要 |
A concentrated solution of mixed alkaline-earth alkoxide compounds M(OCH2R6)2-x(OR7)x and an aluminum compound Al(OCH2R6)3-y(OR7)y, in aprotic solvents, wherein M is an alkaline-earth metal selected from among Mg, Ca, Ba, Sr; OCH2R6 is an alkoxide group comprising at least 3 and at most 40 C atoms and having a branch at the 2-position relative to the O-function, in other words R6 is CHR8R9, wherein R8, R9 are alkyl groups C1-C18 independently of each other; R7 is an alkyl group having 2-15 C atoms that is either linear or has a branch at≧the 3-position; and the sum of x and y is a number between 0.01 and 0.8.
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