BETA-CRYSTALLINE TRICLONAL FORM OF 2,2',2''-NITRILO/TRIETHYL-TRIS- (3,3', 5,5'-TETRATERT.-BUTYL-1,1' - BIPHENYL-2,2'-DIYL)PHOSPHITE/, PROCESS OF ITS PREPARATION, USE AND MIXTURES THEREOF WITH ORGANIC MATERIAL

摘要

The beta crystalline modification of 2,2',2''-nitrilo[triethyl-tris-(3,3',5,5'-tetra-tert-butyl-1,1'-biphenyl-2,2'-diyl) phosphite] is obtained by crystallizing said compound from the melt at elevated temperatures. The beta crystalline form is an effective process stabilizer for polyolefins, particularly polypropylene.