申请人:Ciba-Geigy Corporation
公开号:US05364954A1
公开(公告)日:1994-11-15
The invention relates to a process for the preparation of a pulverulent diorganotin dicarboxylate, which comprises reacting a diorganotin oxide of the formula I, ##STR1## in which R.sup.1 and R.sup.2, independently of one another, are C.sub.1 -C.sub.8 alkyl, 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 ##STR2## in which R.sup.3 is C.sub.1 -C.sub.18 alkylene, cycloalkylene having 5 to 7 carbon atoms, phenylene, C.sub.1 -C.sub.18 alkenylene or C.sub.1 -C.sub.8 alkylene substituted by 1 or 2 hydroxyl groups, or its anhydride, 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 stabilization of chlorine-containing polymers against the damaging effect of light, oxygen and/or heat.
本发明涉及一种制备粉末状二有机锡二羧酸盐的方法,包括在无溶剂和吸附剂的情况下,将式I的二有机锡氧化物,其中R1和R2独立地为C1-C8烷基,在45℃至70℃的温度下与式II的二羧酸反应,其中R3为C1-C18亚烷基,5至7个碳原子的环烷基,苯基,C1-C18烯基或1或2个羟基取代的C1-C8烷基,或其酐,并在反应和后续冷却阶段对反应混合物和产物进行持续彻底混合。因此,所得到的二有机锡二羧酸盐适用于稳定含氯聚合物,以抵抗光、氧和/或热的损害作用。