Stabilizer compositions containing substituted chroman compounds and methods of use
First Claim
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1. A method for enhancing processing stability of polypropylene homopolymer, the method comprising adding to said polypropylene from 0.01% to 10% by weight based on the total weight of the polypropylene of a stabilizer composition comprising vitamin E acetate and zinc stearate;
- wherein amounts of the vitamin E acetate and zinc stearate in the stabilizer composition are selected to enhance processing stability of the polypropylene even in the absence of antistatic agents and organic phosphites and phosphonites by improving retention of melt index (MI) of the polypropylene when subjected to multi-pass extrusion.
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Abstract
Stabilizer compositions having a chroman-based compound according to Formula (V):
and their use in processes for stabilizing organic materials subject to degradation and/or discoloration due to the effects from light, oxygen and heat, and in processes for producing articles from organic materials blended therewith, are provided herein.
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13 Claims
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1. A method for enhancing processing stability of polypropylene homopolymer, the method comprising adding to said polypropylene from 0.01% to 10% by weight based on the total weight of the polypropylene of a stabilizer composition comprising vitamin E acetate and zinc stearate;
- wherein amounts of the vitamin E acetate and zinc stearate in the stabilizer composition are selected to enhance processing stability of the polypropylene even in the absence of antistatic agents and organic phosphites and phosphonites by improving retention of melt index (MI) of the polypropylene when subjected to multi-pass extrusion.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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