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US 8,182,734 B1Granted
Thermoformed articles and compositions of poly(hydroxyalkanoic acid) and polyoxymethylene
AssigneeE. I. Du Pont de Nemours and Company
InventorJulius Uradnisheck
Life of this patent
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Abstract
Disclosed are poly(hydroxyalkanoic acid) resin compositions comprising poly(hydroxyalkanoic acid), such as polylactic acid, and a polyoxymethylene. Also disclosed are articles such as films, sheets and thermoformed containers comprising the compositions.
Claims19
An article comprising a composition wherein
- the composition comprises or is produced from poly(hydroxyalkanoic acid) and 0.1 to 0.9 weight % of a polyoxymethylene, based on the total amount of the composition;
- and
- the article is a thermoformed article.
A poly(hydroxyalkanoic acid) composition comprising (i) poly(hydroxyalkanoic acid) and (ii) from 0.1 to 0.9 weight % of a polyoxymethylene resin.
A process comprising compounding a composition to produce a compounded composition;
- producing a film or sheet from the composition;
- and thermoforming the film or sheet in a mold at a thermoforming temperature effective to form a shaped article wherein
- the composition comprises or is produced from poly(hydroxyalkanoic acid) and 0.1 to 9 weight % of a polyoxymethylene, based on the total amount of the composition;
- the article is thermoformed article;
- and
- the composition has a glass transition temperature that is within 5% of the glass transition temperature of the poly(hydroxyalkanoic acid).
3 more elements
Dependencies are inferred from the claim text.