JPWO2019103074A1 - 樹脂組成物、溶融成形用材料、多層構造体および熱水殺菌用包装材料 - Google Patents
樹脂組成物、溶融成形用材料、多層構造体および熱水殺菌用包装材料 Download PDFInfo
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- JPWO2019103074A1 JPWO2019103074A1 JP2018562126A JP2018562126A JPWO2019103074A1 JP WO2019103074 A1 JPWO2019103074 A1 JP WO2019103074A1 JP 2018562126 A JP2018562126 A JP 2018562126A JP 2018562126 A JP2018562126 A JP 2018562126A JP WO2019103074 A1 JPWO2019103074 A1 JP WO2019103074A1
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- Prior art keywords
- resin composition
- resin
- evoh
- sorbic acid
- polyamide
- Prior art date
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- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims abstract description 90
- -1 sorbic acid ester Chemical class 0.000 claims abstract description 88
- 235000010199 sorbic acid Nutrition 0.000 claims abstract description 60
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- 238000004040 coloring Methods 0.000 abstract description 20
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- RZXDTJIXPSCHCI-UHFFFAOYSA-N hexa-1,5-diene-2,5-diol Chemical compound OC(=C)CCC(O)=C RZXDTJIXPSCHCI-UHFFFAOYSA-N 0.000 abstract description 3
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- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 4
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- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 3
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- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 2
- 240000008415 Lactuca sativa Species 0.000 description 2
- 244000178870 Lavandula angustifolia Species 0.000 description 2
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- 159000000003 magnesium salts Chemical class 0.000 description 2
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 2
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- B32B25/042—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
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- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
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- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
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Abstract
Description
本発明の樹脂組成物は、EVOH(A)、ポリアミド系樹脂(B)およびソルビン酸エステル(C)を含有する。以下、本発明の樹脂組成物の各成分について順に説明する。
本発明で用いるEVOH(A)は、通常、エチレンとビニルエステル系モノマーとを共重合させた後にケン化させることにより得られる樹脂であり、一般的にエチレン−ビニルアルコール系共重合体やエチレン−ビニルエステル系共重合体ケン化物と称される非水溶性の熱可塑性樹脂である。重合法も公知の任意の重合法、例えば、溶液重合、懸濁重合、エマルジョン重合を用いることができるが、一般的にはメタノールを溶媒とする溶液重合が用いられる。得られたエチレン−ビニルエステル系共重合体のケン化も公知の方法で行い得る。
すなわち、本発明で用いるEVOH(A)は、エチレン構造単位とビニルアルコール構造単位を主とし、通常、ケン化されずに残存した若干量のビニルエステル構造単位を含むものである。
上記コモノマーとしては、例えば、プロピレン、1−ブテン、イソブテン等のオレフィン類や、2−プロペン−1−オール、3−ブテン−1−オール、4−ペンテン−1−オール、5−ヘキセン−1−オール、3,4−ジヒドロキシ−1−ブテン、5−ヘキセン−1,2−ジオール等の水酸基含有α−オレフィン類や、そのエステル化物である、3,4−ジアシロキシ−1−ブテン、3,4−ジアセトキシ−1−ブテン、2,3−ジアセトキシ−1−アリルオキシプロパン、2−アセトキシ−1−アリルオキシ−3−ヒドロキシプロパン、3−アセトキシ−1−アリルオキシ−2−ヒドロキシプロパン、グリセリンモノビニルエーテル、グリセリンモノイソプロペニルエーテル等、水酸基含有α−オレフィン類のアシル化物等の誘導体、1,3−ヒドロキシ−2−メチレンプロパン、1,5−ヒドロキシ−3−メチレンペンタン等のヒドロキシメチルビニリデン類;これらのエステル化物である1,3−ジアセトキシ−2−メチレンプロパン、1,3−ジプロピオニルオキシ−2−メチレンプロパン、1,3−ジブチロニルオキシ−2−メチレンプロパン等のビニリデンジアセテート類;アクリル酸、メタクリル酸、クロトン酸、(無水)フタル酸、(無水)マレイン酸、(無水)イタコン酸等の不飽和酸類あるいはその塩あるいは炭素数1〜18のモノまたはジアルキルエステル類、アクリルアミド、炭素数1〜18のN−アルキルアクリルアミド、N,N−ジメチルアクリルアミド、2−アクリルアミドプロパンスルホン酸あるいはその塩、アクリルアミドプロピルジメチルアミンあるいはその酸塩あるいはその4級塩等のアクリルアミド類、メタアクリルアミド、炭素数1〜18のN−アルキルメタクリルアミド、N,N−ジメチルメタクリルアミド、2−メタクリルアミドプロパンスルホン酸あるいはその塩、メタクリルアミドプロピルジメチルアミンあるいはその酸塩あるいはその4級塩等のメタクリルアミド類、N−ビニルピロリドン、N−ビニルホルムアミド、N−ビニルアセトアミド等のN−ビニルアミド類、アクリルニトリル、メタクリルニトリル等のシアン化ビニル類、炭素数1〜18のアルキルビニルエーテル、ヒドロキシアルキルビニルエーテル、アルコキシアルキルビニルエーテル等のビニルエーテル類、塩化ビニル、塩化ビニリデン、フッ化ビニル、フッ化ビニリデン、臭化ビニル等のハロゲン化ビニル化合物類、トリメトキシビニルシラン等のビニルシラン類、酢酸アリル、塩化アリル等のハロゲン化アリル化合物類、アリルアルコール、ジメトキシアリルアルコール等のアリルアルコール類、トリメチル−(3−アクリルアミド−3−ジメチルプロピル)−アンモニウムクロリド、アクリルアミド−2−メチルプロパンスルホン酸等のコモノマーがあげられる。これらは単独でもしくは2種以上併せて用いることができる。
本発明で用いるポリアミド系樹脂(B)は、非水溶性の熱可塑性樹脂であり、公知一般のものを用いることができる。
本発明は、EVOH(A)およびポリアミド系樹脂(B)を含有する樹脂組成物において、ソルビン酸エステル(C)を特定微量にて配合することにより、着色および溶融粘度増加を抑制するという顕著な効果を奏するものである。
このようにして、常にラジカルを捕捉可能なソルビン酸が生成することから、樹脂組成物において、ラジカルの発生した早い段階でラジカルを捕捉することが可能となり、優れた着色抑制効果が得られると推測される。本発明においては、ソルビン酸エステル(C)の配合量が特定微量である場合、上記のサイクルが効率よく働き、顕著な耐熱劣化性および着色抑制効果が得られるものと推測される。
本発明の樹脂組成物には、EVOH(A)およびポリアミド系樹脂(B)以外に、さらに樹脂成分として、他の熱可塑性樹脂を、樹脂組成物に対して、通常30重量%以下、好ましくは10重量%以下となるような範囲内で含有してもよい。
本発明の樹脂組成物には、上記各成分の他、必要に応じて、本発明の効果を損なわない範囲内(例えば、樹脂組成物全体の10重量%以下、好ましくは5重量%以下の含有割合)において、エチレングリコール、グリセリン、ヘキサンジオール等の脂肪族多価アルコール等の可塑剤;高級脂肪酸(例えばラウリン酸、ミリスチン酸、パルミチン酸、ステアリン酸、ベヘニン酸、オレイン酸等)、高級脂肪酸の金属塩(例えばステアリン酸カルシウム、ステアリン酸マグネシウム等)、高級脂肪酸エステル(高級脂肪酸のメチルエステル、イソプロピルエステル、ブチルエステル、オクチルエステル等)、高級脂肪族アミド(例えばステアリン酸アミド等、オレイン酸アミド等)、ビス高級脂肪酸アミド(例えばエチレンビスステアリン酸アミド等)、低分子量ポリオレフィン(例えば、分子量500〜10000程度の低分子量ポリエチレン、または低分子量ポリプロピレン)等の滑剤;乾燥剤;酸素吸収剤;無機フィラー;熱安定剤;光安定剤;難燃剤;架橋剤;硬化剤;発泡剤;結晶核剤;防曇剤;生分解用添加剤;シランカップリング剤;アンチブロッキング剤;酸化防止剤;着色剤;帯電防止剤;紫外線吸収剤;抗菌剤;不溶性無機複塩(例えば、ハイドロタルサイト等);界面活性剤;ワックス等の公知の添加剤を適宜配合することができる。これらは単独でもしくは2種以上併せて用いることができる。
これらのうち、特に、酢酸、ホウ酸およびその塩を含むホウ素化合物、酢酸塩、リン酸塩を配合することが好ましい。
本発明の樹脂組成物は、前記必須成分であるEVOH(A)、ポリアミド系樹脂(B)およびソルビン酸エステル(C)と必要に応じて配合される上記の各任意成分を用いて製造されるが、製造方法としては、例えば、ドライブレンド法、溶融混合法、溶液混合法、含浸法等の公知の方法があげられ、これらを任意に組み合わせることも可能である。
室温(25℃)下において、樹脂組成物を試料とし、乾燥前重量(W1)を電子天秤にて秤量する。その後、この試料を150℃の熱風乾燥機中で5時間乾燥させる。乾燥後、デシケーター中で30分間放冷して樹脂組成物の温度を室温に戻した後の重量(W2)を秤量し、下記式より算出する。
含水率(重量%)=[(W1−W2)/W1]×100
本発明の多層構造体は、上記本発明の樹脂組成物からなる層を備えるものである。本発明の樹脂組成物からなる層(以下、「樹脂組成物層」と称する)は、本発明の樹脂組成物以外の熱可塑性樹脂を主成分とする他の基材(以下、「基材樹脂」と称する)と積層することで、さらに強度を付与したり、樹脂組成物層を水分等の影響から保護したり、他の機能を付与することができる。
なお、例中「部」、「%」とあるのは、断りのない限り重量基準を意味する。
・EVOH(A):エチレン構造単位の含有量29モル%、ケン化度100モル%、MFR3.2g/10分(210℃、荷重2160g)のエチレン−ビニルアルコール共重合体
・ポリアミド系樹脂(B−1):ナイロン6(DSM社製 「Novamid 1028EN」)
・ポリアミド系樹脂(B−2):ナイロン6/66(宇部興産社製 「5033B」)
上記EVOH(A)のペレット80部、上記ポリアミド系樹脂(B−1)のペレット20部をドライブレンドした。その後ドライブレンドしたペレット100部、ソルビン酸エステル(C)としてソルビン酸メチル(富士フイルム和光純薬社製、分子量126)0.0000004部(樹脂組成物の重量当たり0.004ppm)をプラストグラフ(ブラベンダー社製)にて、250℃で5分間予熱したのち、250℃、50rpmの条件下において5分間溶融混練し、その後冷却固化させ、塊状の樹脂組成物を得た。得られた樹脂組成物を、粉砕機(ソメタニ産業社製、型式:SKR16−240)を用い、回転刃の回転数650rpmにて粉砕して粉砕物を得た。かかる粉砕物は、1mm角から5mm角の小片であった。また、かかる樹脂組成物の含水率は、0.17%であった。
実施例1において、ソルビン酸メチルの配合量を0.00008部(樹脂組成物の重量当たり0.8ppm)に変更した以外は、実施例1と同様にして実施例2の樹脂組成物およびその粉砕物を得た。かかる樹脂組成物の含水率は、0.19%であった。
実施例1において、ソルビン酸メチルをソルビン酸エチル(富士フイルム和光純薬社製、分子量140)に変更した以外は、実施例1と同様にして実施例3の樹脂組成物およびその粉砕物を得た。かかる樹脂組成物の含水率は、0.13%であった。
実施例1において、ポリアミド系樹脂(B−1)をポリアミド系樹脂(B−2)に変更した以外は、実施例1と同様にして実施例4の樹脂組成物およびその粉砕物を得た。かかる組成物の含水率は、0.15%であった。
実施例1において、ソルビン酸メチルを配合しなかった以外は実施例1と同様にして比較例1の樹脂組成物およびその粉砕物を得た。かかる樹脂組成物の含水率は、0.17%であった。
実施例1において、ソルビン酸メチルの配合量を0.0012部(樹脂組成物の重量当たり12ppm)に変更した以外は、実施例1と同様にして比較例2の樹脂組成物およびその粉砕物を得た。かかる樹脂組成物の含水率は、0.11%であった。
実施例1において、ポリアミド系樹脂(B)およびソルビン酸エステル(C)を配合せず、EVOH(A)のみを用いた以外は実施例1と同様に溶融混練し、粉砕して、参考例1の粉砕物を得た。かかるEVOH(A)の含水率は、0.11%であった。
上記の実施例1〜4、比較例1、2および参考例1の粉砕物をサンプルとし、日本電色工業社製 分光色差計 SE6000にてYI値を測定した。このとき、内径32mm高さ30mmの円筒状の容器にサンプルを充填し擦りきった状態で測定に供した。かかる値が大きいほど、樹脂組成物が黄色く着色していることを意味する。
上記の実施例1〜4、比較例1、2および参考例1の粉砕物55gをプラストグラフ(ブラベンダー社製)にて、250℃、50rpmの条件下で30分間混練した。15分時点、30分時点のトルク値を評価した。かかるトルク値が大きいほど、樹脂組成物の粘度が高いことを意味する。
これに対し、特定微量のソルビン酸エステル(C)を含有する実施例1〜4の樹脂組成物は、比較例1よりもYI値が低く、着色が抑制されていた。また、比較例2よりもソルビン酸エステル(C)の配合量が少ないにも関わらず、YI値が低下し着色が抑制されるという予想外の効果が得られた。
これに対し、実施例1〜4の樹脂組成物は、15分、30分後の粘度がいずれも比較例1,2より低く、かつ参考例1より高いため、溶融粘度の増加が適度に抑制されることがわかる。
Claims (5)
- エチレン−ビニルアルコール系共重合体(A)、ポリアミド系樹脂(B)およびソルビン酸エステル(C)を含有する樹脂組成物であって、上記ソルビン酸エステル(C)の含有量が、上記樹脂組成物の重量当たり0.00001〜10ppmであることを特徴とする樹脂組成物。
- 上記ポリアミド系樹脂(B)に対するエチレン−ビニルアルコール系共重合体(A)の重量含有比率が、エチレン−ビニルアルコール系共重合体(A)/ポリアミド系樹脂(B)=1/99〜99/1であることを特徴とする請求項1記載の樹脂組成物。
- 請求項1または2記載の樹脂組成物からなることを特徴とする溶融成形用材料。
- 請求項1または2記載の樹脂組成物からなる層を備えることを特徴とする多層構造体。
- 請求項4記載の多層構造体からなることを特徴とする熱水殺菌用包装材料。
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- 2018-11-22 JP JP2018562126A patent/JP7419654B2/ja active Active
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JP2015071695A (ja) * | 2013-10-02 | 2015-04-16 | 株式会社クラレ | エチレン−ビニルアルコール樹脂組成物、多層構造体、多層シート、容器及び包装材 |
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Publication number | Publication date |
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CN111108149B (zh) | 2023-06-23 |
US20200224018A1 (en) | 2020-07-16 |
EP3715413A4 (en) | 2020-12-09 |
CN111108149A (zh) | 2020-05-05 |
JP7419654B2 (ja) | 2024-01-23 |
US11161971B2 (en) | 2021-11-02 |
WO2019103074A1 (ja) | 2019-05-31 |
EP3715413A1 (en) | 2020-09-30 |
EP3715413B1 (en) | 2022-05-25 |
TW201925319A (zh) | 2019-07-01 |
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