Beta crystalline modification of 2,2',2"-nitrilo[triethyl-tris-(

Details Beta crystalline modification of 2,2',2"-nitrilo[triethyl-tris-( Beta crystalline modification of 2,2',2"-nitrilo[triethyl-tris-(

1993-11-12

1994-09-06

Hoke, Veronica P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

252 499, 554 4, 558147, C07F 96574, C08K 5527

Patent

active

053448600

ABSTRACT:
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.

REFERENCES:
patent: 4318895 (1982-03-01), Spivack et al.
patent: 4374219 (1983-02-01), Spivack et al.
patent: 4683326 (1987-07-01), Orban et al.
Pures' Applied Chemistry: vol. 45, pp. 11-30 Pergamon Press, 1976.

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