Stabilized polyolefin compositions containing (a) p-octyl phenyl salicylate, (b) 2, 6 di-t-butyl-p cresol, (c) di-lauryl thiodipropionate and (d) a chlorinated polybiphenyl and method of making same

Claim 1

A STABILIZED SOLID POLY-A-OLEFIN COMPOSITION COMPRISING: A POLY-A-OLEFIN, FROM ABOUT 1/2% TO ABOUT 5% P-OCTYLPHENYL SALICYLATE, FROM ABOUT 1/4% TO ABOUT 2% OF 2,6-DI-TERTIARYBUTYL-P-CRESOL, FROM ABOUT 0.1% TO ABOUT 4% OF DI-LAURYL-THIODIPROPIONATE AND FROM ABOUT 1% TO ABOUT 30% OF A CHLORINATED POLYPHENYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF CHLORINATED BIPHENYL, CHLORINATED TRIPHENYL, AND BLENDS OF CHLORINATED BIPHHHENYL AND CHLORINATED TRIPHENYL, AND CHLORINATED POLYPHENYL COMPOUNDS CONTAINING FROM ABOUT 20% TO 70% BY WEIGHT OF CHLORINE.

Claim 3

A METHOD OF MAKING A SUNLIGHT-STABLE AND WEATHER-STABLE POLY-A-OLEFIN SHEPED ARTICLE OF MANUFACTURE WHICH COMPRISES: DISSOLVING P-OCTYLPHENYL SALICYLATE, 2,6-DITERTIARYBUTYL-P-CERSOL AND DI-LAURYL-THIODIPROPIONATE IN A CHLORINATED POLYPHENYL COMPOUND TO FORM A SOLUTION, MIXING AND SOLUTION WITH A POLY-A-OLEFIN POLYMER, HEATING SAID MIXTURE TO A TEMPERATURE OF FROM ABOUT 200*F. TO 300*F. FOR A PERIOD OF FROM ABOUT 1/2 HOUR TO 8 HOURS WHEREBY THE POLY-A-OLEFIN UNIFORMLY ABSORBS SAID SOLUTION AND FORMING SAID MIXTURE INTO A SHAPED ARTICLE.

Claim 4

A METHOD OF MAKING A SUNLIGHT-STABLE AND WEATHER-STABLE POLY-A-OLEFIN SHEPED ARTICLE OF MANUFACTURE WHICH COMPRISES: DISSOLVING P-OCTYLPHENYL SALICYLATE, 2,6-DITERTIARYBUTYL-P-CERSOL AND DI-LAURYL-THIODIPROPIONATE IN A CHLORINATED POLYPHENYL COMPOUND TO FORM A SOLUTION, MIXING AND SOLUTION WITH A POLY-A-OLEFIN POLYMER, HEATING SAID MIXTURE TO A TEMPERATURE OF FROM ABOUT 200*F. TO 300*F. FOR A PERIOD OF FROM ABOUT 1/2 HOUR TO 8 HOURS WHEREBY THE POLY-A-OLEFIN UNIFORMLY ABSORBS SAID SOLUTION AND FORMING SAID MIXTURE INTO A SHAPED ARTICLE.