Process for the preparation of diorganotin mercaptocarboxylates

Details Process for the preparation of diorganotin mercaptocarboxylates Process for the preparation of diorganotin mercaptocarboxylates

1993-06-24

1995-01-10

Dees, Jose G.

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

Organic compounds

Heavy metal containing

C07F 722

Patent

active

053808967

ABSTRACT:
The invention relates to a process for the preparation of a pulverulent diorganotin mercaptocarboxylate, 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.18 alkyl, at a temperature in the range from 35.degree. C. to 70.degree. C. in the absence of solvents and/or adsorbents with a mercaptocarboxylic acid of the formula II ##STR2## in which R.sup.3 is alkylene having 1 to 18 C atoms or is phenylene, and subjecting the reaction mixture and product during the reaction and the subsequent cooling phase to constant thorough mixing.
The process products are suitable for the stabilisation of chlorine-containing polymers against the damaging effect of light, oxygen and/or heat.

REFERENCES:
patent: 3349109 (1967-10-01), Lach
patent: 5238605 (1993-08-01), Abeler et al.
Derwent 65300v/37 (1972).
C.A. 85(11) 78202s (1991).
C.A. 115(9) 92614x (1991).
Derwent 69378y/39 (1975).
Derwent WPI Acc No: 91-269009/37 (1993).
C.A. 37348u vol. 75, 1971.

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