BETA-CRYSTAL MODIFICATION OF 2, 2'''-NITRILO(TRIETHYL-TRIS-(TETRA-TERT-BUTYL-1, 1'-BIPHENYL-2, 2'-DIYL)PHOSPHIT

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.