Stabilizing additives for polyolefins

Details Stabilizing additives for polyolefins Stabilizing additives for polyolefins

1978-05-01

1980-01-22

Hoke, V. P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 457PH, C08K 552

Patent

active

041849876

ABSTRACT:
Partial esters of polyhydroxy compounds and combinations thereof with organophosphorus compounds have been found to be effective stabilizers for polyolefins made in processes wherein such polymers are not subjected to extensive removal of process produced impurities during or subsequent to the polymerization process. Combinations of polypropylene produced in a solventless polymerization process and such partial esters are particularly suitable and show substantially improved stability in the presence of additional stabilizing compounds.

REFERENCES:
patent: 2985617 (1961-05-01), Salyer et al.
patent: 3000871 (1961-09-01), Engel
patent: 3039993 (1962-06-01), Friedman
patent: 3423347 (1969-01-01), Zawadzki et al.
patent: 4104247 (1978-08-01), Kato et al.
patent: 4107136 (1978-08-01), Minagawa et al.
Encyclopedia of Polymer Science and Technology--vol. 6, pp. 275 to 286; 1967.
Crystalline Olefin Polymers--Part 1--(1965) by Raff pp. 323 to 334.

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