Solvent-free process for the preparation of the beta crystalline

Details Solvent-free process for the preparation of the beta crystalline Solvent-free process for the preparation of the beta crystalline

1995-02-28

1996-01-23

Ramsuer, Robert W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus esters

524119, C07F 96574

Patent

active

054866413

ABSTRACT:
The beta crystalline form of 2,2',2"-nitrilo[triethyl-tris-(3,3',5,5'-tetra-tert-butyl-1,1'-biphenyl-2, 2'-diyl) phosphite] is obtained by the thermal treatment of the phosphite compound at 125.degree. C. in the absence of any solvent.
The beta crystalline form is an effective process stabilizer for polyolefins, particularly polypropylene.

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