Patent ID: 8198352

Claim:
Composition comprising: from 85 wt % to 99.999 wt % of at least one monoalkyltin compound of formula RSn(T) 3 ; from 0.001 wt % to 10 wt % of at least one di-alkyltin compound of formula R 2 Sn(T) 2 ; from 0.001 wt % to 5 wt % of at least one tri-alkyltin compound of formula R 3 Sn(T); and from 0 wt % to 5 wt % of one or more impurities, wherein R is linear, branched or cyclic C 1 -C 20 alkyl and T is a ligand selected from the group consisting of thioglycolate esters, 2-ethylhexylthioglycolate esters, iso-octylthioglycolates, iso-butylthioglycolates, thioglycolate, hydroxyl, carboxylates, maleates, diketonates, alcoholates, and 2-ethylhexylmercaptoacetate.