Process for the preparation of diorganotin dicarboxylates

Details Process for the preparation of diorganotin dicarboxylates Process for the preparation of diorganotin dicarboxylates

1993-06-24

1994-11-15

Dees, Jose G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

C07F 722

Patent

active

053649540

ABSTRACT:
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.

REFERENCES:
patent: 3522282 (1970-07-01), Hirshman et al.
patent: 4032552 (1977-06-01), Dworkin et al.
patent: 5238605 (1993-08-01), Abeler et al.
Houben-Weyl, 4 Ed. Stuttgart 1978, vol. XIII/6 pp. 304-305 and 440-441.
Derwent 00347y/01 (1976).
C.A. 72(3) 12884r (1991).
C.A. 72(3) 12879t (1991).
C.A. 75(7) 49336b (1991).
Chem. Abstracts vol. 80, 1974, 4361t.

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