Application US20200190279

LIQUID COMPOSITION COMPRISING BIOLOGICAL ENTITIES AND USES THEREOF
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US20200190279

1-28. (canceled) (0)

29. A liquid composition suitable to be incorporated in a partially or totally molten polymer, comprising biological entities having a polymer-degrading activity, a carrier and an aqueous solvent, wherein: (16) (2)

i) the carrier is a polysaccharide selected from starch derivatives, natural gums, marine extracts, microbial polysaccharides and animal polysaccharides, and

ii) the composition comprises, based on the total weight of the composition: from 0.01% to 35% by weight of biological entities,

from 15% to 95% by weight of the aqueous solvent, and

from 3% to 80% by weight of carrier.

30. The composition of claim 29, comprising based on the total weight of the composition: (0) (3)

31. The composition of claim 29, comprising based on the total weight of the composition: (0) (3)

32. The composition of claim 29, wherein the aqueous solvent is water, and wherein the composition comprises more than 20% by weight of water, based on the total weight of the composition. (0)

33. The composition of claim 29, wherein the aqueous solvent is water, and wherein the composition comprises more than 30%, and less than 80%, by weight of water, based on the total weight of the composition. (0)

34. The composition of claim 29, wherein the biological entities are selected from enzymes having a polyester-degrading activity. (0)

35. The composition of claim 29, wherein the biological entities are selected from enzymes having a PLA-degrading activity. (0)

36. The composition of claim 29, wherein the composition comprises less than 70% by weight of carrier. (0)

37. The composition of claim 29, wherein the carrier is a natural gum selected from arabic gum, guar gum, tragacanth gum or karaya gum. (0)

38. The composition of claim 29, comprising based on the total weight of the composition: (0) (3)

39. The composition of claim 29, comprising based on the total weight of the composition: (0) (3)

40. The composition of claim 29, comprising based on the total weight of the composition about 50% of water, from 0.01% to 35% of PLA-degrading enzymes, and from 20% to 49.99% of Arabic gum. (0)

41. The composition of claim 29, wherein the carrier is a starch derivative. (0)

42. A plastic article comprising a polymer and the composition according to claim 29, wherein the biological entities of the composition are able to degrade said polymer of the plastic article. (0)

43. A process for preparing a plastic article comprising the steps of: (2) (3)

a) preparing a masterbatch comprising polymer-degrading biological entities and a first polymer by: (i) heating said first polymer; and

(ii) introducing from 5% to 50% by weight of the composition according to claim 29, based on the total weight of the masterbatch, during heating of the first polymer; and

b) introducing the masterbatch in a polymer-based matrix during production of the plastic article,

wherein step a) is performed at a temperature at which the first polymer is in a partially or totally molten state, and step b) is performed at a temperature at which both the first polymer and the polymer of the polymer-based matrix are in a partially or totally molten state and wherein the biological entities of the composition are able to degrade a polymer of the polymer-based matrix.

44. The process of claim 43, wherein the first polymer is a polymer having a melting temperature below 140° C. and/or a glass transition temperature below 70° C. selected from a polyester, starch, EVA or mixtures thereof. (0)

45. The process of claim 43, wherein the first polymer is selected from PCL, EVA, PBAT, PLA or mixtures thereof. (0)

46. A process for the manufacture of a plastic article comprising a step (a) of mixing between 0.01% and 10% by weight of the composition according to claim 29, with a least one polymer, wherein the biological entities of the composition are able to degrade said polymer and a step (b) of shaping said mixture of step (a) in a plastic article. (1) (0)

48. A process for the manufacture of a plastic article containing biological entities comprising successively a step of introducing the liquid composition according to claim 29 in a first polymer to obtain a mixture, and a step of introducing said mixture in a second polymer different from the first polymer, wherein the first polymer has melting point below 140° C. and the second polymer has a melting point above 140° C. (0)

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Application US20200190279

LIQUID COMPOSITION COMPRISING BIOLOGICAL ENTITIES AND USES THEREOF

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