Process for the preparation of diorganotin mercaptocarboxylates

U.S. Patent Number: 5380896

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.

Inventors: Fuchs; Reiner (Ober-Ramstadt, DE), Kaufhold; Johannes (Lindenfels, DE), Malzacher; Kornelia (Lindenfels, DE)

Assignee: Ciba-Geigy Corporation (Ardsley, NY)

Application Number: 08/082,184

Issued: 1995-01-10

Expired: 2007-01-10

Classes: 556/91

Field of search: 556/91

Click the image above to view patent images at uspto.gov within a frame.

Click here for the fulltext page on uspto.gov within a frame.