Stabilizing high density polyethylene containing chromium cataly

Details Stabilizing high density polyethylene containing chromium cataly Stabilizing high density polyethylene containing chromium cataly

1987-07-30

1989-03-21

Hoke, Veronica P.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

25240024, 524343, 524387, 524388, C08K 552

Patent

active

048143677

ABSTRACT:
High density polyethylene containing chromium catalyst residues is stabilized using a combination stabilizer system comprising 2,2'-ethylidene-bis(4,6-di-t-butylphenol), a solid polyol having from five to six carbon atoms and one alcoholic hydroxyl on each carbon, and a tris(alkylaryl)phosphite.

REFERENCES:
patent: 3489826 (1970-01-01), Wescott
patent: 4170589 (1979-10-01), Goeke et al.
patent: 4290941 (1981-09-01), Zinke et al.
A. Tkac, L. Omelka and J. Holcik: J. Polymer Sci. Symposium 40, 105-117 (1973).
Klender, Glass, Kolodchin & Schell: ANTEC '85, pp. 989-995.
Klender, Glass, Juneau, Kolodchin and Schell: Polyolefins V, Section C, Polyolefin Additives pp. 225-245, Jan. 1987.

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