Polyolefins stabilized by a combination of boric acid, phenolic compounds, and sulfur containing compounds

Claim 1

A COMPOSITION HAVING IMPROVED OXIDATIVE STABILITY AND COLOR WHICH COMPRISES A SOLID POLYMER OF AN ALPHA MONO-OLEFIN, HAVING 2 TO 8 CARBON ATOMS IN THE MOLECULE CONTAINING A COMTAMINATING AMOUNT OF COPPER AND EFFECTIVE AMOUNTS WITHIN THE RANGE FROM ABOUT 0.01% TO ABOUT 1.0% BY WEIGHT OF A PHENOLIC INHIBITOR SELECTED FROM THE GROUP CONSISTING OF DIPINENE DIPHENOL, A2, A6-BIS (3 - T - BUTYL - 5 - METHYL - 2 - HYDROXYPHENYL) MESITOL, 2,6-DI-T-BUTYL-4-METHYLPHENOL, 4,4''-THIOBIS-(3-METHYL-6-TBUTYLPHENOL),4,4'' - (1,1 - BUTYLIDENE) BIS - (3 - METHYL6 - T - BUTYLPHENOL),2,6 - BIS(A - PHENETHYL) - 4 - METHYL PHENOL,2,6 - BIS(1,1 - DIMETHYL - N - OCTYL) - 4 - METHYL PHENOL,2,2''-METHYLENEBIS-(4-METHYL-6-T-BUTYLPHENOL), AND 4,4''-METHYLENEBIS-(2,6-DI-T-BUTYLPHENOL); A SULFUR-CONTAINING COSTABILIZER SELECTED FROM THE GROUP CONSISTING OF DIALKYL SULFIDES HAVING 12 TO 30 CARBON ATOMS IN THE MOLECULE, DISTEARYLTHIODIPROPIONATE, DILAURYLTHIODIPROPIONATE, 19,25-DITHIOHENTETETRACONTANE, 19,25-DITHIOTETRACONTANE, BIS(OCTADECYLMERCAPTO)-P-XYLYLENE, AND BIS(TETRADECYLMERCAPTO)-P-XYLYLENE; AND BORIC ACID.