Synergistic co-nucleants for butene-1 polymer compositions
AssigneeShell Oil Company
InventorsCharles C. Hwo, John A. Martone
Life of this patent
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Abstract
The crystallization from the melt of an isotactic butene-1 homopolymer composition, isotactic butene-1-ethylene copolymer or isotactic butene-1-propylene copolymer composition is promoted by adding a small amount of stearamide and high density polyethylene as nucleating agents. The two nucleating agents cooperate in a synergistic fashion, resulting in much faster processing rates.
Claims6
A method for promoting crystallization from the melt of an isotactic butene-1 homopolymer, isotactic butene-1-propylene copolymer or isotactic butene-1-ethylene copolymer having no more than about 15 mole percent by ethylene, which comprises adding to a composition comprising the homopolymer or copolymer about 0.02 to 5.0% by weight stearamide and about 0.02 to 5.0% by weight high density polyethylene.
Dependencies are inferred from the claim text.