Copolyester blends with improved melt strength
AssigneeE. I. Du Pont de Nemours and Company
InventorsRameshchandra M. Gohil, Yuefei Tao, Mark F. Teasley, Lech Wilczek
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Abstract
Blends comprising 65-95 wt % poly(trimethylene terephthalate-co-sebacate), 5 to 35 wt % polylactic acid and a chain extender are provided that exhibit greatly increased melt strength compared to that of poly(trimethylene terephthalate-co-sebacate) alone. Such improvements allow these compositions to be processed readily by melt-blowing, which is useful for packaging and for preparing items such as biodegradable garbage bags.
Claims7
A blend comprising 65-95 wt % poly(trimethylene terephthalate-co-sebacate), 5-35 wt % polylactic acid, and 0.01-0.10 wt % chain-extender, wherein the weight percents are based on the combined weight of the poly(trimethylene terephthalate-co-sebacate), polylactic acid, and chain extender.
Dependencies are inferred from the claim text.