Phenol free stabilization of polyethylene film

Details Phenol free stabilization of polyethylene film Phenol free stabilization of polyethylene film

2008-04-22

2008-04-22

Szekely, Peter (Department: 1796)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S130000, C524S151000, C524S152000, C524S153000

Reexamination Certificate

active

11091182

ABSTRACT:
This invention provides a process for the stabilization of thermoplastic polyolefins during melt processing operations. The stabilizer package of this invention is “phenol free” and must contain at least one aryl monophosphite and at least one diphosphite. The process of this invention is especially suitable for the manufacture of polyethylene film.

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Urs Stadler, Impact of Stabilization Additives on the Controlled Degradation of Polypropylene, Polyolefins 2001, Houston, TX, 2001, pp. 521-542.

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