Amorphous and crystalline modifications of 1,1',1-nitrilo triethyl-tris¬2,2'-methylene-bis(4,6-di-tert-butyl-phenyl) phosphite

摘要

A novel amorphous modification and novel crystalline modifications of 1,1',1"-nitriloätriethyl-trisÄ2,2'-methylene-bis(4,6-di-tert-butylphen yl)Üphosphiteü are disclosed. The amorphous modification is obtained by cooling rapidly said compound from the melt to ambient temperature. The crystalline modifications are obtained by crystallizing said compound from the melt at elevated temperatures. The amorphous and crystalline modifications are effective processing stabilizers for polyolefins, particularly polypropylene.