STABILIZED POLYPROPYLENE AND PROPYLENE COPOLYMERS

摘要

Polypropylene and copolymers related to polypropylene with low yellow colour level and low content of grey pellets are gained, in the case a synergic mixture of phenol and phosphide stabilisers contains 10 up to 90 weight percent of phosphides being able to hydrolyse up to 7 percent and 10 up to 90 weight percent of phosphides being able to hydrolyse over 7 percent. The capability of phosphides to be hydrolysed is measured based on the contact of phosphides with air humidity.