Process for preparing a polymer/biological entities alloy

Patent metadata

Field	Value
Publication number	US-2016333147-A1
Application number	US-201615220159-A
Country	US
Kind code	A1
Filing date	Jul 26, 2016
Priority date	Dec 20, 2011
Publication date	Nov 17, 2016
Grant date	—

Abstract

The present invention relates to a process for preparing a polymer/biological entities alloy, comprising a step of mixing a polymer and biological entities that degrade it, during a heat treatment, said heat treatment being performed at a temperature T above room temperature and said biological entities being resistant to said temperature T, characterized in that said biological entities are chosen from enzymes that degrade said polymer and microorganisms that degrade said polymer.

First claim

1 .- 24 . (canceled)

25 . A process for preparing a polymer/biological entities alloy, comprising:
mixing a polymer with one or more biological entities while exposing the mixture to a heat treatment performed at a temperature T, wherein: said one or more biological entities are capable of degrading the polymer and are selected from enzymes that degrade the polymer in said alloy and microorganisms that degrade the polymer in said alloy, and the temperature T is a temperature at which the polymer is in a partially or totally molten state, and is above room temperature.

26 . A process for preparing a polymer/biological entities alloy, comprising:
mixing polylactic acid with one or more biological entities while exposing the mixture to a heat treatment performed at a temperature T, wherein: said biological entities are capable of degrading the polylactic acid and are selected from enzymes that degrade the polylactic acid in said alloy and microorganisms that degrade the polylactic acid in said alloy, the temperature T is a temperature at which polylactic acid is in a partially or totally molten state, and is above room temperature.

27 . The process as claimed in claim 25 , wherein said temperature T is between the glass transition temperature and the melting point of said polymer.

28 . The process as claimed in claim 26 , wherein said temperature T is between the glass transition temperature and the melting point of polylactic acid.

29 . The process as claimed in claim 25 , wherein said heat treatment comprises an operation selected from the group consisting of extrusion, injection-molding, thermoforming, rotary molding, compression, calendering, ironing, coating, stratification, expansion, pultrusion, extrusion blow-molding, extrusion-swelling, and compression-granulation.

30 . The process as claimed in claim 26 , wherein said heat treatment comprises an operation selected from the group consisting of extrusion, injection-molding, thermoforming, rotary molding, compression, calendering, ironing, coating, stratification, expansion, pultrusion, extrusion blow-molding, extrusion-swelling, and compression-granulation.

31 . The process as claimed in claim 25 , wherein the biological entities/polymer weight ratio is between about 0.1% and about 10%.

32 . The process as claimed in claim 26 , wherein the biological entities/polymer weight ratio is between about 0.1% and about 10%.

33 . The process as claimed in claim 25 , wherein said polymer is selected from the group consisting of polymers derived from the petrochemical industry, bio-sourced polymers, and mixtures thereof.

34 . The process as claimed in claim 33 , wherein said polymer is selected from the group consisting of polycaprolactone, polytetramethylene succinate, copolyesters, polyesteramides, polypropylene, vinyl polymers, poly(C 1 -C 6 hydroxyalkanoates), poly(butylene adipate-co-terephthalate), poly(butylene succinate), polyamides, polyvinyl chloride, polyethylene, polyethylene terephthalate, poly(trimethylene terephthalate), and mixtures thereof.

35 . The process as claimed in claim 33 , wherein said polymer is selected from the group consisting of polycaprolactone, a C 1 -C 6 polyhydroxyalkanoate, poly(butylene succinate), polyamide PA11, and mixtures thereof.

36 . The process as claimed in claim 25 , wherein said biological entities are enzymes selected from the group consisting of heat-resistant enzymes and heat-stabilized enzymes.

37 . The process as claimed in claim 36 , wherein said biological entities are heat-resistant enzymes selected from the group consisting of lipase PS from Pseudomonas cepacia , lipase AK from Pseudomonas fluorescens , lipase B from Candida antartica , proteinase K, a C 1 -C 6 polyhydroxyalkanoate depolymerase, and mixtures thereof.

38 . The process as claimed in claim 26 , wherein said biological entities are enzymes selected from the group consisting of heat-resistant enzymes and heat-stabilized enzymes.

39 . The process as claimed in claim 25 , wherein said temperature T is greater than 50° C.

40 . The process as claimed in claim 26 , wherein said temperature T is greater than 50° C.

41 . A polymer/biological entities alloy made by the process as claimed in claim 25 .

42 . A polymer/biological entities alloy made by the process as claimed in claim 26 .

43 . The process as claimed in claim 25 , wherein said temperature T is the melting point of said polymer.

44 . The process as claimed in claim 25 , wherein said temperature T is above the melting point of said polymer.

45 . The process as claimed in claim 26 , wherein said temperature T is the melting point of polylactic acid.

46 . The process as claimed in claim 26 , wherein said temperature T is above the melting point of polylactic acid.

Assignees

• Centre Nat Rech Scient
• Univ Poitiers
• Valagro Carbone Renouvelable Poitou- Charentes

Inventors

• Ferreira Thierry
• Bataille Frederic
• Dever Cedric
• Barbier Jacques

Classifications

• C08J3/005 Primary

  Processes for mixing polymers · CPC title

• C08L2201/06

  Biodegradable · CPC title

• C08J3/20 Primary

  Compounding polymers with additives, e.g. colouring · CPC title

• C08L67/04

  Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence) · CPC title

• C08J2367/04

  Polyesters derived from hydroxy carboxylic acids, e.g. lactones (C08J2367/06 takes precedence) · CPC title