Patent ID: 7781610

Claim:
A process for the transesterification of two esters, which process comprises reacting the two esters in a reaction mixture comprising an effective amount of an organotin compound of the formula X1, X2, or X3: wherein Z is —(CH 2 ) m —; m is a number of from 4 to 24; and Y is an insoluble phenyl-group containing copolymer, R 1 , R 2 , R 3 are independently selected from the group consisting of halogen, C 1 -C 18 alkyl, C 1 -C 18 alkylene, phenyl, vinyl, allyl, naphthyl and aralkyl, with the proviso that at least one of R 1 , R 2 , or R 3 is a halogen; R 4 is C 1 -C 18 alkyl, C 1 -C 18 alkylene, phenyl, vinyl, allyl, naphthyl, or aralkyl; R 5 and R 6 are independently selected from the group consisting of halogen, C 1 -C 18 alkyl, C 1 -C 18 alkylene, phenyl, vinyl, allyl, naphthyl, and aralkyl, with the proviso that at least one of R 5 or R 6 is a halogen with the proviso that when m is 4 or 6, two of R 1 , R 2 , and R 3 are not chlorine.