Novel organo-tin compounds and their use as stabilizers

Claim 1

Organo-tin compounds of the formula ##STR11## wherein R 1 through R 4 , being identical or different, each represent (a) from 0 to 3 hydrogen atoms, (b) a phenyl radical or a cycloalkyl or cycloalkylene radical having from 5 to 12 carbon atoms, these radicals optionally being substituted by alkyl group having from 1 to 9 carbon atoms, halogen or -OH, (c) a linear or branched alkyl radical having from 1 to 100 carbon atoms, optionally substituted by a phenyl, a C 1 -C 9 -alkylphenyl, a cycloalkyl or cycloalkylene group having from 5 to 12 carbon atoms; the radicals cited sub b) and c) optionally containing ether, thioether, carboxylic acid ester or epoxide groups, halogen substituents and C=C bonds in addition, and/or R 2 and R 3 being common members of a saturated or unsaturated, optionally alkyl- or aryl-substituted alkylene chain having from 3 to 10 carbon atoms; and the sum of all carbon atoms contained in the radicals R 1 through R 4 being superior to 2 and up to 100; R 5 is an arylene group or a saturated or unsaturated, optionally alkyl- or phenyl-substituted alkylene group having from 1 to 12 carbon atoms in the alkylene chain, the alkyl substituents possibly present in the alkylene chain optionally containing carboxylic acid ester groups, R 6 is a linear or branched alkyl radical having from 1 to 30 carbon atoms, a vinyl, allyl, aralkyl, aryl or cycloalkyl radical having from 5 to 8 carbon atoms, and m is 1, 2 or 3.