JP7030252B1 - 樹脂混練用添加剤 - Google Patents
樹脂混練用添加剤 Download PDFInfo
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- JP7030252B1 JP7030252B1 JP2021572614A JP2021572614A JP7030252B1 JP 7030252 B1 JP7030252 B1 JP 7030252B1 JP 2021572614 A JP2021572614 A JP 2021572614A JP 2021572614 A JP2021572614 A JP 2021572614A JP 7030252 B1 JP7030252 B1 JP 7030252B1
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- Prior art keywords
- resin
- mass
- vinyl monomer
- additive
- radical scavenger
- Prior art date
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- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
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- Health & Medical Sciences (AREA)
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Abstract
Description
・Tinuvin99-2:ベンゾトリアゾール系紫外線吸収剤、純度95%、25℃で液状、BASF社製
・Tinuvin460:トリアジン系紫外線吸収剤、25℃で固形状、BASF社製
・アデカスタブLA-63P:ヒンダードアミン系ラジカル捕捉剤、25℃で固形状、アデカ社製
・Tinuvin292:ヒンダードアミン系ラジカル捕捉剤、25℃で液状、BASF社製
・Irganox1010:ヒンダードフェノール系ラジカル捕捉剤、25℃で固形状、BASF社製
・MMA:メタクリル酸メチル、単官能性ビニルモノマー、商品名「ライトエステルM」(ライトエステルは登録商標)、共栄社化学社製
スチレン:スチレンモノマー、単官能性ビニルモノマー、和光特級試薬、富士フイルム和光純薬社製
・EGDMA:エチレングリコールジメタクリレート、多官能性ビニルモノマー、商品名「ライトエステルEG」(ライトエステルは登録商標)、共栄社化学社製
・DVB:ジビニルベンゼン、多官能ビニルモノマー、異性体混合物、純度93%以上、富士フイルム和光純薬社製
・パーロイルL:商品名、ジラウロイルパーオキシド、重合開始剤、日油社製
・パーヘキシルO:商品名、t-ヘキシルペルオキシ-2-エチルヘキサノエイト、重合開始剤、日油社製
・プロノン208:商品名、ポリオキシエチレンポリオキシプロピレンブロックコポリマー、乳化剤、日油社製
・ポバール22―88:商品名、部分鹸化ポリビニルアルコール、分散剤、クラレ社製
・デモールNL:商品名、β-ナフタレンスルホン酸ホルムアルデヒド縮合物ナトリウム塩の41%水溶液、分散剤、花王社製
実施例1と同様に処理して、樹脂混練用添加剤を得た。但し、配合処方および処理は、表1および表2の記載に従って変更した。比較例1では、懸濁液の乾燥時に、樹脂混練用添加剤が凝集して融着した。この樹脂混練用添加剤をほぐしても、後述する樹脂との配合に適する粉体粒子として調製することができなかった。また、比較例4では、アデカスタブ1413およびアデカスタブLA-63Pがビニルモノマー成分に溶解せず、疎水性溶液を調製できなった。そのため、懸濁重合を実施できず、粉体粒子を得ることができなかった。比較例5では、液状のTinuvin99-2に起因する樹脂同士の融着により、粉体粒子を得ることができなかった。
各実施例および比較例の樹脂混練用添加剤と、それを含む樹脂成形体とのそれぞれについて、下記評価を実施した。それらの結果を表1および表2に記載する。
<重合性>
比較例4は、疎水性溶液を調製できなった。そのため、懸濁重合を実施できなかった。そのため、重合性を「×」と評価した。一方、それ以外の比較例と、全ての実施例は、懸濁重合を実施できた。そのため、重合性を「○」と評価した。
懸濁液をレーザー回折散乱式粒子径分布測定装置LA-960V2(堀場製作所社製)で測定して、樹脂混練用添加剤のメジアン径を求めた。
粉体粒子における有機紫外線吸収剤およびラジカル捕捉剤の総量の割合を求めた。具体的には、テトラヒドロフランで粉体粒子の有機紫外線吸収剤およびラジカル捕捉剤の総量を抽出し、HPLC、GPCおよびGCMSのうちから選択される少なくとも1つを用いて、有機紫外線吸収剤およびラジカル捕捉剤の質量百分率をそれぞれ測定した。移動相および測定装置の条件は、以下の通りである。
移動相:アセトニトリル/水=8/2(質量基準)
カラム:YMC-Pack ODS-A(ワイエムシィ社製)
カラム温度:40℃
検出器:フォトダイオードアレイ検出器(SPD-M20A、島津製作所社製)
移動相:テトラヒドロフラン
カラム:KF-801(昭和電工社製)
カラム温度:40℃
検出器:示差屈折率検出器(RID-M20A、島津製作所社製)
移動相:高純度He
カラム:Rtx-5 Amine(Restek社製)
カラム温度:300℃
検出器:質量分析計(GCMS-QP2010Ultra、島津製作所社製)
樹脂混練用添加剤0.1gを1Kビンに測り取り、そこへ流動パラフィン(モレスコホワイトP-70、平均分子量:323、動粘度:12.56mm2/s(40℃)、密度:0.843g/cm3(15℃)、MORESCO社製)を2.5g加えた。1日静置後、0.45μmフィルターでろ過し、流動パラフィン中に放出された有機紫外線吸収剤およびラジカル捕捉剤の合計量をHPLC、GPCおよびGCMSのうちから選択される少なくとも1つを用いて測定した。これにより、有機紫外線吸収剤およびラジカル捕捉剤の合計の溶脱率を求めた。
ペレットを評価するために、まず、樹脂混練用添加剤と樹脂とを配合した。配合は、以下の通りである。
樹脂成形体における樹脂添加剤を、簡易卓上SEM(日立ハイテクノロジーズ社製Miniscope TM-3000)で状態を観察した。図1から図3のそれぞれに、実施例1、比較例6および比較例7のSEM写真の画像処理図を示す。
ペレットにおける有機紫外線吸収剤およびラジカル捕捉剤の総量をテトラヒドロフランで抽出した。抽出液中の有機紫外線吸収剤およびラジカル捕捉剤の合計をHPLC、GPCおよびGCMSのうちから選択される少なくとも1つを用いて測定し、有機紫外線吸収剤およびラジカル捕捉剤の総量の残存率を評価した。具体的な抽出条件は、以下の通りである。
テトラヒドロフラン量:5mL
抽出時間:3日間
×:アイゾット衝撃強度が35.0J/m未満であった。
ペレットと、低密度ポリエチレン樹脂(「ノバテックLD」LF441MD)とをドライブレンドし、二軸押出機(サーモサイエンティフィック社製MiniCTW)を通して溶融し、同社の射出成形機MiniJetで、長さ50mm、幅10mm、厚み1mmの試験片を成形した。有機紫外線吸収剤と、ラジカル捕捉剤との質量部数を、低密度ポリエチレン樹脂100質量部に対して、それぞれ、0.2質量部に調整した。各試験片を、スーパーキセノンウェザーメーターSX75(スガ試験機社製)で180W/m2、1600時間の耐光促進試験を実施し、下記の基準で、耐光性を評価した。
×:目視にて試験片にひび割れを確認できた。
その結果、樹脂組成物を組成した後の混練成形において変形または崩壊する。従って、樹脂成形体においてブリードを生じる。
Claims (4)
- 有機紫外線吸収剤および/またはラジカル捕捉剤と、前記有機紫外線吸収剤および/または前記ラジカル捕捉剤を分散するポリマーとを含有する樹脂混練用添加剤であり、
前記樹脂混練用添加剤は、粉体粒子であり、
1μm以上、100μm以下のメジアン径を有し、
前記樹脂混練用添加剤における前記有機紫外線吸収剤および前記ラジカル捕捉剤の総量の百分率が、20質量%以上、70質量%以下であり、
前記ポリマーは、重合性の炭素-炭素二重結合を分子内に1つのみ含有する単官能ビニルモノマーと、重合性の炭素-炭素二重結合を分子内に2つ以上含有する多官能ビニルモノマーとを含有するビニルモノマー成分の共重合体であり、
前記単官能ビニルモノマーと前記多官能ビニルモノマーとの総量における前記単官能ビニルモノマーの百分率が、10質量%以上、95質量%以下であることを特徴とする、樹脂混練用添加剤。 - 前記単官能ビニルモノマーの百分率が、55質量%以上であることを特徴とする、請求項1に記載の樹脂混練用添加剤。
- 前記メジアン径が、5μm以上、30μm以下であることを特徴とする、請求項1に記載の樹脂混練用添加剤。
- 前記メジアン径が、5μm以上、30μm以下であることを特徴とする、請求項2に記載の樹脂混練用添加剤。
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JPS5815502A (ja) * | 1981-07-21 | 1983-01-28 | Dainippon Ink & Chem Inc | 重合体分散液の製造法 |
JPH07292009A (ja) * | 1994-04-22 | 1995-11-07 | Dainippon Ink & Chem Inc | 樹脂水性分散液の製造方法 |
WO2014010492A1 (ja) * | 2012-07-10 | 2014-01-16 | 株式会社Adeka | 混合ペレット |
WO2019042999A1 (en) * | 2017-09-01 | 2019-03-07 | Basf Se | FORMS OF CONCENTRATED WATER-BASED PRODUCT OF OIL-SOLUBLE ORGANIC UV-ABSORBS |
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JP5763570B2 (ja) | 2011-03-11 | 2015-08-12 | 大阪ガスケミカル株式会社 | 徐放性粒子およびその製造方法 |
JP6083936B2 (ja) | 2011-03-11 | 2017-02-22 | 大阪ガスケミカル株式会社 | 徐放性粒子の製造方法 |
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JPS5815502A (ja) * | 1981-07-21 | 1983-01-28 | Dainippon Ink & Chem Inc | 重合体分散液の製造法 |
JPH07292009A (ja) * | 1994-04-22 | 1995-11-07 | Dainippon Ink & Chem Inc | 樹脂水性分散液の製造方法 |
WO2014010492A1 (ja) * | 2012-07-10 | 2014-01-16 | 株式会社Adeka | 混合ペレット |
WO2019042999A1 (en) * | 2017-09-01 | 2019-03-07 | Basf Se | FORMS OF CONCENTRATED WATER-BASED PRODUCT OF OIL-SOLUBLE ORGANIC UV-ABSORBS |
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