| 摘要 |
Process for the preparation of diorganotin dicarboxylates of the disclosure: The invention relates to a process for the preparation of a pulverulent diorganotin dicarboxylate, which comprises reacting a diorganotin oxide of the formula I, (I) in which R1 and R2, independently of one another, are C1-C18alkyl, at a temperature in the range from 45.degree.C to 70.degree.C in the absence of solvents and adsorbents with a dicarboxylic acid of the formula II (II) in which R3 is C1-C18alkylene, cycloalkylene having 5 to 7 carbon atoms, phenylene, C1-C18alkenylene or C1-C8alkylene substituted by 1 or 2 hydroxyl groups, or its anhy-dride, and subjecting the reaction mixture and the product during the reaction and the subsequent cooling phase to constant thorough mixing. The diorganotin dicarboxylates thus obtained are suitable for the stabilisation of chlorine-containing polymers against the damaging effect of light, oxygen and/or heat.
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