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Application US20200199354
Published 2020-06-25
Biodegradable Polyester Article Comprising Enzymes
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.
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- 1.-17. (canceled)
- 18. 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 the 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 carrier selected from polysaccharides, and a carrier polymer having a melting temperature below 140° C. and/or a glass transition temperature below 70° C.
- 22.-24. (canceled)
- 26. (canceled)
- 28.-30. (canceled)
- 31. A masterbatch comprising at least one enzyme having a polyester-degrading activity, a carrier selected from polysaccharides and a carrier polymer having a melting temperature below 140° C. and/or a glass transition temperature below 70° C.
- 46. A process for preparing a masterbatch comprising at least one enzyme having a polyester-degrading activity, a carrier selected among polysaccharides 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 at least one enzyme and the carrier with the carrier polymer at a temperature at which the carrier polymer is in a partially or totally molten state.
