Biodegradable polyester article comprising enzymes
AssigneeCarbiolice
InventorsMediha DALIBEY, Clementine ARNAULT, Nadia AUCLAIR
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Abstract
The present invention relates to novel biodegradable plastic articles comprising a polyester and biological entities able to degrade such polyester, and wherein the biological entities are homogeneously dispersed in the plastic articles. The invention also relates to a process for producing such plastic articles, comprising a step of mixing biological entities with a selected carrier in a liquid composition or in a masterbatch with the polyester.
Claims26
-45. (canceled)
A biodegradable plastic article comprising at least one polyester and enzymes having a polyester-degrading activity, comprising a polysaccharide carrier selected from starch derivatives, natural gums, marine extracts, microbial and animal polysaccharides and mixtures thereof and optionally a carrier polymer having a melting temperature below 140° C. and/or a glass transition temperature below 70° C., the biological entities being able to degrade said polyester and being homogeneously dispersed in the plastic article.
A process for preparing a plastic article comprising at least one polyester and enzymes having a polyester-degrading activity homogeneously dispersed in the plastic article, said process comprising a step (a) of mixing between 0.01% and 10% by weight of enzymes having a polyester-degrading activity with a least said one polyester and a step (b) of shaping said mixture of step (a) in a plastic article,
- wherein the enzymes are mixed during step (a) under a form appropriate for allowing homogeneous dispersion of the said enzymes in the plastic article, selected from:
- a liquid composition comprising the enzymes, a polysaccharide carrier and water, or
- a masterbatch comprising the enzymes and a carrier polymer having a melting temperature below 140° C. and/or a glass transition temperature below 70° C.,
- wherein said masterbatch is prepared by mixing a liquid composition of the enzymes with the carrier polymer in a partially or totally molten state.
A masterbatch comprising enzymes having a polyester-degrading activity, a polysaccharides carrier and a carrier polymer having a melting temperature below 140° C. and/or a glass transition temperature below 70° C., wherein said masterbatch is prepared by mixing a liquid composition of the enzymes with the carrier polymer in a partially or totally molten state.
Dependencies are inferred from the claim text.