Gamma crystalline modification of 2.2',2"-nitrilo[triethyl-tris-

Details Gamma crystalline modification of 2.2',2"-nitrilo[triethyl-tris- Gamma crystalline modification of 2.2',2"-nitrilo[triethyl-tris-

1994-02-18

1995-04-11

Morgan, Kriellion S.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524111, 25240024, C08K 552

Patent

active

054058937

ABSTRACT:
The gamma 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 or recrystallizing said compound from an alkanol of 4 to 8 carbon atoms.
The gamma crystalline form is an effective process stabilizer for polyolefins, particularly polypropylene.

REFERENCES:
patent: 4318845 (1982-03-01), Spivack et al.
patent: 4374219 (1983-02-01), Spivack et al.
Pure & Applied Chemistry--vol. 45, pp. 11-30 Pergamon Press, 1976.

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