Biodegradable polyester article comprising enzymes
AssigneeCarbiolice
InventorsMediha Dalibey, Clementine Arnault, Nadia Auclair
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Abstract
Biodegradable polyester article comprising enzymes. 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.
Claims27
A process for preparing a plastic article comprising at least one polyester and at least one enzyme 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 at least one enzyme 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 at least one enzyme is mixed during step (a) under the form of a masterbatch comprising the at least one enzyme having a polyester-degrading activity, a polysaccharide carrier selected from natural gums and a carrier polymer having a melting temperature below 140° C. and/or a glass transition temperature below 70° C.
A masterbatch comprising at least one enzyme having a polyester-degrading activity, a polysaccharide carrier selected from natural gums and a carrier polymer having a melting temperature below 140° C. and/or a glass transition temperature below 70° C.
A process for preparing a masterbatch comprising at least one enzyme having a polyester-degrading activity, a polysaccharide carrier selected from natural gums and a carrier polymer having a melting temperature below 140° C. and/or a glass transition temperature below 70° C., said process comprising mixing a liquid composition comprising the enzymes and the polysaccharide carrier with the carrier polymer at a temperature at which the carrier polymer is in a partially or totally molten state.
Dependencies are inferred from the claim text.