Organic based thermal stabilizers and heat stabilized polymer compositions

1. An organic based composition comprising at least one organic based heat stabilizer component, which comprises a zinc salt and at least one sulfur compound selected from the group consisting of a free mercaptan, a zinc mercaptide, and a latent mercaptan; and at least one stabilizer modifying component selected from the group consisting of liquid calcium soap and 1,3,5-tris (2-hydroxyethyl) cyanuric acid,

wherein said liquid calcium soap is substantially free of other metal salts and comprises a solution of a calcium soap which is a liquid at 105° C.

2. The composition of claim 1 wherein the latent mercaptan has the structure:

wherein a is 0 or 1, m and n are 0 or 1; y=1 to 4; when y=1, z is 1 to 4; and when y is more than 1, z is 1; R 1 is an alkyl, alkylenyl, cycloalkyl, cycloalkylenyl, aryl, alkaryl, aralkyl, aralkylenyl, hydroxyalkyl, dihydroxyalkyl, hydroxy(polyalkoxy)alkyl, alkoxyalkyl, hydroxyalkoxyalkyl, alkoxy(hydroxyalkyl), alkoxy(acyloxyalkyl), alkoxy(polyalkoxy)alkyl, alkoxy(polyalkoxy)carbonylalkyl, carboxyalkyl, acyloxyalkyl, acyloxy(hydroxyalkyl), acyloxyalkoxyalkyl, acyloxy(polyalkoxy)alkyl, benzoyloxy(polyalkoxy)alkyl, alkylenebis-( acyloxyalkyl), alkoxycarbonylalkyl, alkoxycarbonylalkylenyl, hydroxyalkoxycarbonylalkyl, hydroxy(polyalkoxy)carbonylalkyl, mercaptoalkyl, mercaptoalkylenyl, mercaptoalkoxycarbonylalkyl, mercaptoalkoxycarbonylalkylenyl, alkoxycarbonyl(amido)alkyl, alkylcarbonyloxy(polyalkoxy)carbonylalkyl, tetrahydopyranyloxy(polyalkoxy)carbonylalkyl, tetrahydropyranyloxyalkyl, hydroxyaryl, mercaptoaryl or carboxyaryl radical having from 1 to 22 carbon atoms; R 2 ,R 3 ,R 4 ,R 5 ,R 6 , and R 7 are independently hydrogen, a hydroxyl, mercapto, acyl, alkyl, alkenyl, alkylenyl, aryl, haloaryl, alkaryl, aralkyl, hydroxyalkyl, mercaptoalkyl, hydroxyaryl, alkoxyaryl, alkoxyhydroxyaryl, mercaptoaryl groups having from 1 to 22 carbon atoms; X is aryl, haloaryl, alkaryl, aralkaryl, hydroxyaryl, dihydroxyaryl, arylcycloalkyl, or a heteroatom, with the option that when a is 1 and m is 1, R 6 and R 7 form a heterocyclic moiety in conjunction with X as nitrogen, and with the further option that when a=1 and in 0, one of R 1 , R 3 , and R 5 joins with R 7 and X to form a heterocyclic moiety with X as a heteroatom selected from the group consisting of oxygen and sulfur, with the proviso that z is 1 or 2 when X is aralkaryl, R 6 and R 7 are hydroxyl, a is 1 and m is 1, and with the further proviso that when R 6 is not hydroxyl or mercapto, z is 1.

3. The composition of claim 1 wherein the zinc salt is a zinc carboxylate.

4. The composition of claim 1 wherein said liquid form of a calcium soap provides from 0.1 to 8% of calcium, measured as Ca ++ ion, by weight of the organic based composition.

5. The composition of claim 1 wherein the amount of the 1,3,5 tris-(2-hydroxyethyl) isocyanuric acid is from 0.1 to 3% by weight of the organic based composition.

6. The composition of claim 1 wherein said zinc salt provides from 0.1 to 5% of zinc, measured as Zn ++ ion, by weight of the organic based composition.

7. A heat stabilized polymer composition comprising a halogen-containing polymer and the organic based composition of claim 1 .

8. A heat stabilized polymer composition comprising a halogen-containing polymer and the organic based composition of claim 6 .