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WO2009152114A1 - Procédés et produits destinés à améliorer la recyclabilité de récipients à base de désoxygénants - Google Patents

Procédés et produits destinés à améliorer la recyclabilité de récipients à base de désoxygénants Download PDF

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Publication number
WO2009152114A1
WO2009152114A1 PCT/US2009/046670 US2009046670W WO2009152114A1 WO 2009152114 A1 WO2009152114 A1 WO 2009152114A1 US 2009046670 W US2009046670 W US 2009046670W WO 2009152114 A1 WO2009152114 A1 WO 2009152114A1
Authority
WO
WIPO (PCT)
Prior art keywords
color
container
correcting
polymer
containers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2009/046670
Other languages
English (en)
Inventor
Richard Leonard Hoch
Matthew James Dauzvardis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Constar International LLC
Original Assignee
Constar International LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Constar International LLC filed Critical Constar International LLC
Publication of WO2009152114A1 publication Critical patent/WO2009152114A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
    • B29K2105/0032—Pigments, colouring agents or opacifiyng agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/253—Preform
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0059—Degradable
    • B29K2995/006—Bio-degradable, e.g. bioabsorbable, bioresorbable or bioerodible
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging

Definitions

  • the present invention relates to articles and methods that change the color of recyclable, polymer-based containers.
  • Polymer-based containers such as those comprised of polyethylene terephthalate (PET), polyolefms, for example, polypropylene, polystyrene, polylactic acid (PLA), and the like, provide a cost-effective, lightweight, shatter-resistant packaging method.
  • PET polyethylene terephthalate
  • polyolefms for example, polypropylene, polystyrene, polylactic acid (PLA), and the like
  • PAT polyethylene terephthalate
  • PPA polystyrene
  • PVA polylactic acid
  • additives such as, for example, UV-inhibitors, and/or residual polymerization catalysts. While these containers are generally recyclable, one undesirable attribute is that they have a tendency to undergo a color change upon degradation of the base polymer or oxidation of the additives, for example.
  • Oxygen scavenging compositions such as those described in, for example, U.S. 6,544,611 (assigned to Arteva North American S.A.R.L.); U.S. 6,410,156 (assigned to Honeywell Int'l, Inc.); U.S. 6,083,585 (assigned to B.P. Amoco Corp.); U.S. 5,641,825
  • the sorted containers are then crushed and pressed into bales for sale to recyclers, with the uncolored lots being the most valuable and the mixed color lots being of lesser value.
  • the recycler then processes the containers into "flakes,” pellets, or chips. This processed material can then be sold and used for the manufacture of new containers and other products.
  • polymer-based containers are generally recyclable, they have a tendency to change color during the recycling process, where these containers are exposed to, for example, atmospheric oxygen, heat, moisture, processing chemicals, and light. This tendency is undesirable because the once valuable "uncolored” material, or blue, green, or amber lot, must now be sorted into the lesser-valued "mixed color” lot.
  • This color mixing is a "trial and error" process because the recycler can never be certain how much of the blue lot must to added to the yellow lot, for example, to produce the desired result. Sometimes this color mixing is successful and the recycler can sell the previously undesirably colored lot for a higher price. Oftentimes, the color mixing is unsuccessful and the recycler either sells the material as a mixed color lot or simply discards the lot. Hence, even though the polymer-based containers are technically recyclable, their tendency to change color results in them not being a valuable component to the recycling stream.
  • the present invention is directed to containers comprising a base polymer and a color- correcting amount of a color-correcting material. Also described are methods of correcting the color of a polymer-based container comprising adding a color-correcting amount of a color- correcting material to a container comprising a base polymer. Other methods of correcting the color of a polymer-based container of the present invention include mixing a base polymer with a color-correcting amount of a color-correcting material to form a mixture, forming the mixture into a preform, and forming the preform into a container. Still other embodiments are directed to injecting a color-correcting amount of a color-correcting material at the trailing edge of a preform and forming the preform into a container.
  • FIG. 1 Hunter color space depiction (prior art)
  • FIG. 2 Depicts a preferred embodiment of a container of the present invention
  • FIG. 3 Depicts a preferred embodiment of a container of the present invention
  • the present invention is directed to methods and products to improve the post-consumer recyclability of polymer-based containers that exhibit color change upon exposure to oxygen, heat, moisture, processing chemicals, and light.
  • the base polymer of the present invention comprise polyethylene terethphalate (PET), polyolefms such as polypropylene, polyethylene, polystryene, polylactic acid (PLA), combinations thereof, and the like.
  • the containers comprise an oxygen-scavenger polymer. PET-based oxygen scavenging compositions and containers are known in the art and are described in, for example, U.S. Patent Nos.
  • Containers of the present invention may also comprise additives typically used in the polymer industry, for example, UV- inhibitors.
  • Containers of the present invention may also comprise residual amounts of polymerization catalysts.
  • Certain preferred containers of the present invention are oxygen scavenging containers.
  • Oxygen-scavenging containers of the present invention are primarily comprised of polyethylene terephthalate, with the addition of an oxygen scavenging composition, for example, MXD6, polybutadiene, and derivatives and copolymers thereof.
  • an oxygen scavenging composition for example, MXD6, polybutadiene, and derivatives and copolymers thereof.
  • the oxygen scavenging composition comprises about 1% to 10 wt.% of the container, depending on the composition and its application.
  • These containers typically also include a transition metal catalyst.
  • Cobalt and zinc salts are especially preferred and are typically present in an amount ranging from about 50 to 200 ppm.
  • Containers for use with the present invention will be manufactured according to a manufacturer's, or customer's, specifications. These specifications generally include a color specification.
  • the containers of the present invention while manufactured having a particular color specification, will exhibit a change from that color specification upon exposure to, for example, oxygen, heat, moisture, processing chemicals, and light.
  • color-correcting material for example, toners, pigments, dyes, and the like, are added to the container such that upon the container's exposure to the container's color-shifting conditions, the color-correcting material results in a color-corrected polymer composition having a color specification that is within or near the scope of the original color specification or that is within the scope of different color specification.
  • color-correcting material can be added to the container.
  • the color-correcting material can be applied to the container using any method known in the art for applying color-correcting material to a polymer-based container.
  • the color-correcting material may be applied using ink jet technology.
  • the color-correcting material may be applied by spraying, roll coating, or dip- coating of the container.
  • the present invention also encompasses adding the color-correcting material in the mix delivered to an injection molding machine such that color-correcting material is either distributed throughout the preform or concentrated in one or more portions of the preform.
  • the resulting container will have the color-correcting material distributed throughout or concentrated in one or more portions of the container.
  • an appropriate mass of color-correcting material may be injected at the trailing edge of the preform such that the bottom center of the preform, and hence, the bottom center of the container, has the colored color-correcting material.
  • color-correcting material may be directly affixed to the preform after injection molding.
  • the color-correcting toner can be formulated into a polymer-based medium, and manufactured into a shaped piece, herein referred to as a "coupon," that is applied to the container using any adhesive suitable for use with polymer-based containers, such as a food grade adhesive.
  • the coupon carrying the color-correcting material can be any size or shape, for example, circle, square, triangle, rectangle, and the like.
  • the color- correcting material can be incorporated into the coupon or can be applied to the surface of the coupon using any known techniques.
  • the color-correcting materials of the present invention include food-grade toners, pigments, dyes, and the like.
  • color-correcting materials are those that, when used in accordance with the present invention, in accordance with the principles of color space, result in a less-colored, differently colored, or uncolored material.
  • "Uncolored,” as that term is used in the present application, encompasses those materials that, while colored as measured with a spectrophotometer, appear to have little to no color as perceived by the human eye. This is a concept well understood in the art.
  • Color-correcting materials of the present invention may be supplied further comprising a carrier.
  • a resin-based carrier for example, a polymer such as, for example, PET.
  • Other color-correcting materials for use with the present invention may include a paraffin-based carrier.
  • Other color-correcting materials of the present invention may further comprise solvent carriers, for example, hydrocarbon-based solvents.
  • the color-correcting material either as a coupon, as applied to the container or preform, or as distributed in or through the container or preform, gets incorporated into the recycling stream along with the oxygen scavenging container and provides color correcting properties to the container material during the recycling process.
  • the amount of color-correcting material used in the present invention will vary depending on the color correction desired.
  • the amount of color-correcting material will also vary depending on the type of color-correcting material used and whether the color-correcting material further comprises a carrier.
  • the containers of the present invention will comprise less than 20%, by weight of the container, of color-correcting material.
  • the containers will comprise less than about 10%, by weight of the container, of color-correcting material.
  • Still other embodiments will comprise less than about 5%, by weight of the container, of color-correcting material.
  • Exemplary embodiments will comprise less than about 2.5% of color-correcting material, based on the weight of the container.
  • those embodiments comprising about 1%, or less, by weight of the container, of color-correcting material.
  • the amount of color-correcting material required to correct the color of container of the present invention can be determined using routine experimentation according to parameters understood in the art and in light of the examples set forth herein.
  • PET resin Eastman Vitiva PC715 PET resin (Eastman Chemical Co., Kingsport, TN) was dried under normal drying conditions for PET, i.e., at least 4 hours at 170 0 C in a PET desiccant dryer.
  • PC715 resin is typical of a PET resin used for oxygen scavenging applications.
  • Dried PC715 was mixed with MXD6 (about 1.5 wt.%) and cobalt masterbatch (about 2 wt.%) (CoMB; cobalt-containing polyester containing 4000 ppm cobalt).
  • Various pigment systems were added. These blends, along with a control, were injection molded using a Boy 22S injection molding machine. The process used was typical for PET injection molding with a barrel temperature of 265 0 C. The blends were injected into a mold with a 3-step color chip and ASTM plaque. The plaques were 3" x 2" with a 3mm thickness (maximum).
  • plaques were then "aged” under accelerated conditions selected to replicate conditions experienced during the recycling process.
  • the plaques were placed in an oven at 140 0 F for 2 weeks and 180 0 F for 1 week.
  • the aged plaques were ground using a laboratory mill (Thomas-Wiley Model 4) into pieces of about 2 to 4 mm.
  • CT MAX PET resin M&G Polymers
  • CSD carbonated soft drink

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

Des récipients comprennent un polymère de base et une substance de correction de couleur. La couleur d’un récipient à base de polymère est corrigée grâce à l’ajout d’une quantité efficace de substance de correction de couleur à un récipient comprenant un polymère de base. D’autres procédés de correction de la couleur d’un récipient à base de polymère consistent à mélanger un polymère de base avec une quantité efficace d’une substance de correction de couleur pour constituer un mélange, à mettre en forme le mélange dans une préforme, et à procéder au formage de la préforme en tant que récipient. Une quantité efficace de substance de correction de couleur peut être injectée sur le bord arrière d’une préforme, et la préforme peut être formée en tant que récipient.
PCT/US2009/046670 2008-06-09 2009-06-09 Procédés et produits destinés à améliorer la recyclabilité de récipients à base de désoxygénants Ceased WO2009152114A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5983308P 2008-06-09 2008-06-09
US61/059,833 2008-06-09

Publications (1)

Publication Number Publication Date
WO2009152114A1 true WO2009152114A1 (fr) 2009-12-17

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PCT/US2009/046670 Ceased WO2009152114A1 (fr) 2008-06-09 2009-06-09 Procédés et produits destinés à améliorer la recyclabilité de récipients à base de désoxygénants

Country Status (1)

Country Link
WO (1) WO2009152114A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011043969A3 (fr) * 2009-09-29 2011-08-18 Constar International Compositions de polymère inactiveur d'oxygène compatibles avec un colorant et articles fabriqués à partir de celles-ci
US8431721B2 (en) 2007-05-10 2013-04-30 Constar International, Inc. Oxygen scavenging molecules, articles containing same, and methods of their use
US8450398B2 (en) 2009-11-13 2013-05-28 Constar International, Inc. Oxygen scavengers, compositions comprising the scavengers, and articles made from the compositions
US8722163B2 (en) 2011-09-16 2014-05-13 Pepsico, Inc. Recyclable colorants in plastic beverage containers
US8748519B2 (en) 2009-11-13 2014-06-10 Plastipak Packaging, Inc. Thermoplastic polymers comprising oxygen scavenging molecules
US9181414B2 (en) 2009-11-13 2015-11-10 Plastipak Packaging, Inc. Oxygen scavengers, compositions comprising the scavengers, and articles made from the compositions
US10351692B2 (en) 2014-10-17 2019-07-16 Plastipak Packaging, Inc. Oxygen scavengers, compositions comprising the scavengers, and articles made from the compositions
WO2020030657A1 (fr) * 2018-08-06 2020-02-13 Alpla Werke Alwin Lehner Gmbh & Co. Kg Procédé de préparation de matières thermoplastiques destinées à être réutilisées
US11338983B2 (en) 2014-08-22 2022-05-24 Plastipak Packaging, Inc. Oxygen scavenging compositions, articles containing same, and methods of their use
US11649339B2 (en) 2012-04-30 2023-05-16 Plastipak Packaging, Inc. Oxygen scavenging compositions, articles containing same, and methods of their use

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5686515A (en) * 1995-11-13 1997-11-11 The M.A. Hanna Company Colored polyethylene terephthalate composition and process of its manufacture
US20040155374A1 (en) * 2002-12-18 2004-08-12 Peter Hutchinson Method and apparatus for recycling R-PET and product produced thereby
US6777092B1 (en) * 1997-05-13 2004-08-17 Kirin Beer Kabushiki Kaisha Coating and material for forming vitreous coating film, method of coating with the same, and coater
US20050229450A1 (en) * 2004-03-31 2005-10-20 Larsen Design System for wrapping containers
US20060148957A1 (en) * 2004-12-06 2006-07-06 Constar International Inc. Blends of oxygen scavenging polyamides with polyesters which contain zinc and cobalt

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5686515A (en) * 1995-11-13 1997-11-11 The M.A. Hanna Company Colored polyethylene terephthalate composition and process of its manufacture
US6777092B1 (en) * 1997-05-13 2004-08-17 Kirin Beer Kabushiki Kaisha Coating and material for forming vitreous coating film, method of coating with the same, and coater
US20040155374A1 (en) * 2002-12-18 2004-08-12 Peter Hutchinson Method and apparatus for recycling R-PET and product produced thereby
US20050229450A1 (en) * 2004-03-31 2005-10-20 Larsen Design System for wrapping containers
US20060148957A1 (en) * 2004-12-06 2006-07-06 Constar International Inc. Blends of oxygen scavenging polyamides with polyesters which contain zinc and cobalt

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8431721B2 (en) 2007-05-10 2013-04-30 Constar International, Inc. Oxygen scavenging molecules, articles containing same, and methods of their use
US11739059B2 (en) 2007-05-10 2023-08-29 Plastipak Packaging, Inc. Oxygen scavenging molecules, articles containing same, and methods of their use
US10906870B2 (en) 2007-05-10 2021-02-02 Plastipak Packaging, Inc. Oxygen scavenging molecules, articles containing same, and methods of their use
US10125096B2 (en) 2007-05-10 2018-11-13 Plastipak Packaging, Inc. Oxygen scavenging molecules, articles containing same, and methods of their use
AU2010303748B2 (en) * 2009-09-29 2016-09-29 Plastipak Packaging, Inc. Colorant compatible oxygen scavenging polymer compositions and articles made from same
EP2483342A4 (fr) * 2009-09-29 2013-08-28 Constar Internat Compositions de polymère inactiveur d'oxygène compatibles avec un colorant et articles fabriqués à partir de celles-ci
WO2011043969A3 (fr) * 2009-09-29 2011-08-18 Constar International Compositions de polymère inactiveur d'oxygène compatibles avec un colorant et articles fabriqués à partir de celles-ci
US9896554B2 (en) 2009-09-29 2018-02-20 Plastipak Packaging, Inc. Colorant compatible oxygen scavenging polymer compositions and articles made from same
US10059666B2 (en) 2009-11-13 2018-08-28 Plastipak Packaging, Inc. Oxygen scavengers, compositions comprising the scavengers, and articles made from the compositions
US9222020B2 (en) 2009-11-13 2015-12-29 Plastipak Packaging, Inc. Oxygen scavengers, compositions comprising the scavengers, and articles made from the compositions
US9181414B2 (en) 2009-11-13 2015-11-10 Plastipak Packaging, Inc. Oxygen scavengers, compositions comprising the scavengers, and articles made from the compositions
US10040922B2 (en) 2009-11-13 2018-08-07 Plastipak Packaging, Inc. Oxygen scavengers, compositions comprising the scavengers, and articles made from the compositions
US8975345B2 (en) 2009-11-13 2015-03-10 Plastipak Packaging, Inc. Thermoplastic polymers comprising oxygen scavenging molecules
US8748519B2 (en) 2009-11-13 2014-06-10 Plastipak Packaging, Inc. Thermoplastic polymers comprising oxygen scavenging molecules
US8450398B2 (en) 2009-11-13 2013-05-28 Constar International, Inc. Oxygen scavengers, compositions comprising the scavengers, and articles made from the compositions
US8722163B2 (en) 2011-09-16 2014-05-13 Pepsico, Inc. Recyclable colorants in plastic beverage containers
US11649339B2 (en) 2012-04-30 2023-05-16 Plastipak Packaging, Inc. Oxygen scavenging compositions, articles containing same, and methods of their use
US11338983B2 (en) 2014-08-22 2022-05-24 Plastipak Packaging, Inc. Oxygen scavenging compositions, articles containing same, and methods of their use
US11345534B2 (en) 2014-08-22 2022-05-31 Plastipak Packaging, Inc. Oxygen scavenging compositions, articles containing same, and methods of their use
US11066536B2 (en) 2014-10-17 2021-07-20 Plastipak Packaging, Inc. Oxygen scavengers, compositions comprising the scavengers, and articles made from the compositions
US10351692B2 (en) 2014-10-17 2019-07-16 Plastipak Packaging, Inc. Oxygen scavengers, compositions comprising the scavengers, and articles made from the compositions
US11753524B2 (en) 2014-10-17 2023-09-12 Plastipak Packaging, Inc. Oxygen scavengers, compositions comprising the scavengers, and articles made from the compositions
CH715231A1 (de) * 2018-08-06 2020-02-14 Alpla Werke Alwin Lehner Gmbh & Co Kg Verfahren zur Aufbereitung von zur Wiederverwendung vorgesehenen Thermoplasten.
WO2020030657A1 (fr) * 2018-08-06 2020-02-13 Alpla Werke Alwin Lehner Gmbh & Co. Kg Procédé de préparation de matières thermoplastiques destinées à être réutilisées
CN112689555A (zh) * 2018-08-06 2021-04-20 阿尔温莱纳股份有限两合公司阿尔普拉工厂 用于使得用于回收利用的热塑性材料再生的方法
US11794378B2 (en) 2018-08-06 2023-10-24 Alpla Werke Alwin Lehner Gmbh & Co. Kg Method for reclaiming thermoplastic materials intended for recycling

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