JP6549590B2 - プラスチック容器用酸素捕捉組成物および同組成物を含む壁体 - Google Patents
プラスチック容器用酸素捕捉組成物および同組成物を含む壁体 Download PDFInfo
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- JP6549590B2 JP6549590B2 JP2016543595A JP2016543595A JP6549590B2 JP 6549590 B2 JP6549590 B2 JP 6549590B2 JP 2016543595 A JP2016543595 A JP 2016543595A JP 2016543595 A JP2016543595 A JP 2016543595A JP 6549590 B2 JP6549590 B2 JP 6549590B2
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Classifications
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Description
他の酸素捕捉剤として、亜硫酸カリウム(特許文献4)、不飽和炭化水素(特許文献5)、およびアスコルビン酸誘導体(特許文献6)が挙げられる。
マシューズの(特許文献10)は、酸素捕捉剤として少なくとも1つのシクロヘキセニル基または官能性を有するポリマーの使用を開示する。
本発明の組成物は、少なくとも1つの基材ポリマーを含む。本願明細書で使用される、「基材ポリマー」という用語は、容器の構造および機械的特性を提供する、本発明の容器のポリマー成分を意味する。「基材ポリマー」という用語は、当技術分野において一般的に使用される「構造ポリマー」という用語と同義である。
本発明のいくつかの実施形態において、基材ポリマーのポリエステル組成物は、約40ppm未満のリン、好ましくは約30ppm未満のリン、より好ましくは約20ppm未満のリン、さらに好ましくは約10ppm未満のリンを含み、最も好ましくは、ポリエステル基材ポリマーは実質的にリンを含まない。本願明細書で使用される、「実質的にリンを含まない」という用語は、リンの全量が0から約1ppmであることを意味する。一般的なボトル用PET樹脂は、約40ppmを超えるリンを、主として樹脂形成工程の間の安定化添加剤として使用される、リン酸またはホスホン酸の形態で含む。いかなる特定の理論にも拘束されることを意図しないが、リンはコバルト(または他の遷移金属)に干渉し、著しくコバルト(または他の遷移金属)が酸化触媒として機能する働きを妨げ、その結果が、ブロー成形ボトルにおいて酸素捕捉が検出可能となる前の、1から3か月の誘導期間であると考えられる。例えば以下に記載する酸化性有機成分などの酸化性有機成分と混合された、リンが約40ppm未満のポリエステル基材ポリマーで構成されるポリエステル容器は、驚くべきことに当技術分野で予想される誘導期間を伴うことなく、優れた酸素捕捉特性を示す。適切な「低リン」PET樹脂は市販されており、例えばディーエイケイアメリカズLLC[米国ペンシルバニア州シャッズフォード19317所在]から入手可能な、DAK Laster+ L44AおよびL44Bが挙げられる。実に当業者であれば、実質的にリンを含まないポリエステル樹脂の製造方法を知っているであろう。
[酸化性有機オリゴマー成分]
本発明の組成物は、酸化性有機オリゴマー成分も含む。本発明の酸化性有機オリゴマー成分は、好ましい基材ポリマーであるポリエステルに対し高度の親和性を有することが好ましい。好ましくは、酸化性有機オリゴマー化合物は、式I
アリールスルホン酸化合物の例として、ベンゼンスルホン酸、トルエンスルホン酸、ナフタレンスルホン酸、フェノールスルホン酸、スルホ安息香酸、ニトロベンゼンスルホン酸、アニリンスルホン酸(オルタニル酸、メタニル酸、およびスルファニル酸)、フェニルヒドロキシルアミンスルホン酸、ヒドラジノベンゼンスルホン酸、およびベンゼンジスルホン酸といった芳香族スルホン酸、ベンゼンスルホン酸ナトリウムおよびトルエンスルホン酸ナトリウムといったそれらの金属塩、スルホ安息香酸ジメチルといったそれらのエステル、ならびに塩化ベンゼンスルホニルといったそれらの酸ハロゲン化物が挙げられる。
したがって、アルキルスルホン酸の好ましい例として、メタンスルホン酸、エタンスルホン酸、プロパンスルホン酸、ブタンスルホン酸、ペンタンスルホン酸、ヘキサンスルホン酸、テトラデカンスルホン酸といったアルキルスルホン酸、ナトリウム塩およびカリウム塩といったそれらの金属塩、メチルエステルまたはエチルエステルといったそれらのエステル、およびそれらの酸塩化物といったそれらの酸ハロゲン化物が挙げられる。
いくつかの実施形態において、本発明の酸化性組成物は、酸化性ポリ(アルキレンエーテル)グリコール−α,ω−ジエステルオリゴマーの混合物を含む。1つの典型的な実施形態において、酸化性組成物は、a)式Iに従う酸化性ポリ(アルキレンエーテル)グリコール−α,ω−ジエステルオリゴマー、およびb)次式を有する少なくとも1つの酸化性ポリ(アルキレンエーテル)グリコール−α,ω−ジエステルオリゴマーを備え、
本組成物に使用される遷移金属は、正の酸化数状態の金属である。なお、そのような金属は1つまたは複数使用し得ると考えられる。遷移金属は、酸化性有機成分の酸化(すなわち酸化性有機化合物と酸素分子の反応)を触媒または促進する働きをする。
別の態様において、本発明は、剛性、半剛性、折り畳み式、蓋付き、もしくは可撓性であろうと、またはこれらの組み合わせであろうと、本願明細書中に記載される組成物から形成されるような壁体を備える、包装体を提供する。そのような包装体は、当業者に周知の方法によって形成できる。
本願明細書で使用される、「式を有する」または「構造を有する」という表現は、限定するよう意図されるものではなく、「備える(comprising)」という用語が一般に使用されるのと同じように使用される。「から独立に選択される」という用語は、本願明細書において、列挙される要素(例えばR基など)が同一であっても、または異なっていてもよいことを示すために使用される。
実施例3:この実施例は、PETボトルにおける新規の酸素捕捉添加剤としての、ポリプロピレングリコールジベンゾアート(PPGジベンゾアート、CAS番号72245−46−6)の使用を説明する例である。PPGジベンゾアートは、Uniplex(登録商標)400という商品名でユニテックスケミカルコーポレーションから商業的に入手可能である。この実施例において、PETボトル組成物および工程は、0.5%のPPGジベンゾアート添加剤および0.05%のネオデカン酸コバルトを使用したこと以外、実施例1に記載されるものと同様であった。ボトル内への酸素侵入は、前述のOxySenseを用いる方法で測定された。3週間の保管中の酸素侵入は、対照PETボトルにおける0.8ppmと比較すると、約0.6ppm減少することが見出された。
Claims (33)
- 組成物であって、
a)ポリエステル基材ポリマー、
b)次式を有する少なくとも1つの酸化性ポリ(アルキレンエーテル)グリコール−α,ω−ジエステルオリゴマーであって、
c)組成物中に10から400ppmの量で存在する、正の酸化数状態の少なくとも1つの遷移金属、
を備え、
該少なくとも1つの酸化性ポリ(アルキレンエーテル)グリコール−α,ω−ジエステルオリゴマーが、該組成物の0.10から10重量パーセントの量で存在し、R’およびR’’のうちの少なくとも1つは、(1)アルキルスルホン酸基もしくはその金属塩、または(2)アリールスルホン酸基もしくはその金属塩のいずれかである、組成物。 - 前記少なくとも1つの遷移金属は、コバルトである、請求項1に記載の組成物。
- 前記ポリエステル基材ポリマーは、ポリエチレンテレフタラートである、請求項1に記載の組成物。
- 前記酸化性ポリ(アルキレンエーテル)グリコール−α,ω−ジエステルオリゴマーは、前記組成物の重量に基づき、1から5重量パーセントの量で存在する、請求項1に記載の組成物。
- 前記酸化性ポリ(アルキレンエーテル)グリコール−α,ω−ジエステルオリゴマーは、前記組成物の重量に基づき、1から3重量パーセントの量で存在する、請求項4に記載の組成物。
- 前記遷移金属の濃度は、30から150ppmである、請求項1に記載の組成物。
- R’およびR’’のうちの少なくとも1つは、アルキルスルホン酸基またはアリールスルホン酸基のナトリウム塩である、請求項1に記載の組成物。
- Rは、C4アルキレン基である、請求項1に記載の組成物。
- R’およびR’’のうちの少なくとも1つは、フェニルスルホン酸基である、請求項8に記載の組成物。
- R’およびR’’は、それぞれフェニルスルホン酸基である、請求項9に記載の組成物。
- R’およびR’’は、それぞれフェニルスルホン酸基のナトリウム塩である、請求項9に記載の組成物。
- 前記ポリエステル基材ポリマーは、40ppm未満のリンを含む、請求項1に記載の組成物。
- 前記ポリエステル基材ポリマーは、10ppm未満のリンを含む、請求項12に記載の組成物。
- 前記ポリエステル基材ポリマーは、実質的にリンを含まない、請求項13に記載の組成物。
- 前記1から18個の炭素原子を有するアルキル基および前記6から18個の炭素原子を有する芳香族基のうちの少なくとも1つは、置換されている、請求項1に記載の組成物。
- 少なくとも1つの層を備える包装体用の壁体であって、該層は組成物を備え、該組成物は、
a)ポリエステル基材ポリマー、
b)次式を有する少なくとも1つの酸化性ポリ(アルキレンエーテル)グリコール−α,ω−ジエステルオリゴマー
c)該組成物中に10から400ppmの量で存在する、正の酸化数状態の少なくとも1つの遷移金属、
を備え、
R’およびR’’のうちの少なくとも1つは、(1)アルキルスルホン酸基もしくはその金属塩、または(2)アリールスルホン酸基もしくはその金属塩のいずれかである、壁体。 - 前記少なくとも1つの遷移金属は、コバルトである、請求項16に記載の壁体。
- 前記ポリエステル基材ポリマーは、ポリエチレンテレフタラートである、請求項16に記載の壁体。
- 前記酸化性ポリ(アルキレンエーテル)グリコール−α,ω−ジエステルオリゴマーは、前記組成物の重量に基づき、1から3重量パーセントの量で存在する、請求項18に記載の壁体。
- 前記遷移金属の濃度は、30から150ppmである、請求項16に記載の壁体。
- R’およびR’’のうちの少なくとも1つは、アルキルスルホン酸基またはアリールスルホン酸基のナトリウム塩である、請求項16に記載の壁体。
- Rは、C4アルキレン基である、請求項16に記載の壁体。
- R’およびR’’のうちの少なくとも1つは、フェニルスルホン酸基である、請求項16に記載の壁体。
- R’およびR’’は、それぞれフェニルスルホン酸基である、請求項23に記載の壁体。
- R’およびR’’は、それぞれフェニルスルホン酸基のナトリウム塩である、請求項23に記載の壁体。
- 前記包装体は、単層容器である、請求項16に記載の壁体。
- 前記包装体は、多層容器である、請求項16に記載の壁体。
- 前記ポリエステル基材ポリマーは、40ppm未満のリンを含む、請求項16に記載の壁体。
- 前記ポリエステル基材ポリマーは、10ppm未満のリンを含む、請求項28に記載の壁体。
- 前記ポリエステル基材ポリマーは、実質的にリンを含まない、請求項29に記載の壁体。
- 前記1から18個の炭素原子を有するアルキル基および前記6から18個の炭素原子を有する芳香族基のうちの少なくとも1つは、置換されている、請求項16に記載の壁体。
- 組成物であって、
次式を有する酸化性ポリ(アルキレンエーテル)グリコール−α,ω−ジエステルオリゴマー、
R a は、3から10個の炭素原子を有する置換または無置換のアルキレン鎖であり、
R’ a およびR’’ a は、それぞれ独立にアルキルスルホン酸基もしくはその金属塩、アリールスルホン酸基もしくはその金属塩、1から18個の炭素原子を有するアルキル基、または6から18個の炭素原子を有する芳香族基であり、
mは、4から100であり、
R’ a およびR’’ a のうちの少なくとも1つは、(1)アルキルスルホン酸基もしくはその金属塩、または(2)アリールスルホン酸基もしくはその金属塩のいずれかである)
次式を有する、少なくとも1つの酸化性ポリ(アルキレンエーテル)グリコール−α,ω−ジエステルオリゴマー
Rは、3から10個の炭素原子を有する置換または無置換のアルキレン鎖であり、
R’およびR’’は、それぞれ独立に1から18個の炭素原子を有するアルキル基、または6から18個の炭素原子を有する芳香族基であり、
nは、4から100である)、および
組成物中に10から400ppmの量で存在する、正の酸化数状態の少なくとも1つの遷移金属を、
備え、
該少なくとも1つの酸化性ポリ(アルキレンエーテル)グリコール−α,ω−ジエステルオリゴマーは、該組成物の0.10から10重量パーセントの量で存在する、組成物。 - 組成物であって、
a)次式を有する酸化性ポリ(アルキレンエーテル)グリコール−α,ω−ジエステルオリゴマー、
Rは、3から10個の炭素原子を有する置換または無置換のアルキレン鎖であり、
R’およびR’’は、それぞれ独立にアルキルスルホン酸基もしくはその金属塩、アリールスルホン酸基もしくはその金属塩、1から18個の炭素原子を有するアルキル基、または6から18個の炭素原子を有する芳香族基であり、
nは、4から100であり、
R’およびR’’のうちの少なくとも1つは、(1)アルキルスルホン酸基もしくはその金属塩、または(2)アリールスルホン酸基もしくはその金属塩のいずれかである)
b)次式を有する少なくとも1つの酸化性ポリ(アルキレンエーテル)オリゴマー
HO−[R−O]n−H
(式中、Rは、2から10個の炭素原子を有する置換または無置換のアルキレン鎖であり、nは、4から100である)、および
c)組成物中に10から400ppmの量で存在する、正の酸化数状態の少なくとも1つの遷移金属、
を備え、
該少なくとも1つの酸化性ポリ(アルキレンエーテル)オリゴマーは、該組成物の0.10から10重量パーセントの量で存在する、組成物。
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PCT/US2015/010832 WO2015108781A1 (en) | 2014-01-16 | 2015-01-09 | Oxygen scavenging compositions for plastic containers |
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US20160130434A1 (en) | 2014-11-07 | 2016-05-12 | Graham Packaging Company, L.P. | Oxygen scavenging compositions requiring no induction period |
US10583602B2 (en) * | 2016-03-11 | 2020-03-10 | Ring Container Technologies, Llc | Container and method of manufacture |
TW201835215A (zh) | 2017-02-09 | 2018-10-01 | 英商英威達紡織(英國)有限公司 | 用於改良氣體阻隔性質之聚合物摻合物 |
EP3360911A1 (en) * | 2017-02-14 | 2018-08-15 | Clariant Plastics & Coatings Ltd | Oxygen scavenging plastic material |
US10208200B2 (en) * | 2017-03-30 | 2019-02-19 | Graham Packaging Company, L.P. | Dual oxygen-scavenging compositions requiring no induction period |
WO2019234492A1 (en) | 2018-06-08 | 2019-12-12 | Trevira Holdings Gmbh | Polymer blends with improved oxygen absorption capacity |
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JP2991437B2 (ja) | 1987-07-27 | 1999-12-20 | カヌードメタルボックス パブリック リミテド カンパニー | 包装に関する改良 |
GB2207439B (en) | 1987-07-27 | 1992-02-12 | Metal Box Plc | Improvements in and relating to packaging |
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US5211875A (en) | 1991-06-27 | 1993-05-18 | W. R. Grace & Co.-Conn. | Methods and compositions for oxygen scavenging |
NZ334569A (en) | 1996-09-23 | 2000-08-25 | Bp Amoco Corp | Multilayered plastic containers that are resistant to oxygen permeation |
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AU2011247935B2 (en) | 2010-05-06 | 2014-06-05 | Graham Packaging Company, L.P. | Oxygen scavenging additives for plastic containers |
US20120283366A1 (en) | 2011-05-06 | 2012-11-08 | Graham Packaging Company, L.P. | Activated oxygen scavenging compositions for plastic containers |
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