JP2019196472A - ポリビニルアセタール樹脂組成物およびこれを含む接合用中間膜 - Google Patents
ポリビニルアセタール樹脂組成物およびこれを含む接合用中間膜 Download PDFInfo
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Abstract
Description
前記中間膜は、前記第1層と前記第2層との間に位置し、第3ポリビニルアセタールおよび可塑剤を含む第3層をさらに備えていてもよい。
このように5層構造の接合用中間膜を製造する場合、より広い温度範囲で優れた遮音特性を有することができ、層間異質性を減少させて、層間剥離現象が顕著に減少した接合用中間膜を提供することができる。
前記中間膜に含まれる第2層の厚さは、0.04〜0.20mmであってもよく、0.07〜0.18mmであってもよく、0.09〜0.15mmであってもよい。
(樹脂1の合成)
90℃の蒸留水570gに、重合度1,700、ケン化度99%のポリビニルアルコール(PVA)30gを投入して、5.00wt%のPVA水溶液を製造し、反応器に入れた。前記反応器の温度を17℃まで低減した後、触媒として純度37モル%の塩酸38.57gを投入した後、反応器の温度を50〜55℃に維持しつつ、n−ブタナール29.7gを少量ずつ投入し、3時間PVB合成を進めた。
上記の(樹脂1の合成)で製造された樹脂1を170℃および6baraの高温高圧容器にH2/N2の還元雰囲気で5時間処理された後、水洗などの工程を経て樹脂2を合成した。
上記の(樹脂1の合成)で製造された樹脂1を170℃および6baraの高温高圧容器にH2/N2の還元雰囲気で10時間処理された後、水洗などの工程を経て樹脂3を合成した。
TD−GC/MS(Thermal Desorption−Gas Chromatograph/Mass Spectrometer)を利用して試料内のn−ブタナール含量と2−エチル−ヘキサノールの相対量を確認した。
酸化防止剤としてirganox1010 0.1wt%、irgafos168 0.1wt%、接合力調節剤として酢酸マグネシウム0.03wt%(30ppm)、酢酸カリウム0.03wt%(30ppm)、紫外線遮断剤としてチヌビンP 0.3wt%、可塑剤としてトリエチレングリコールビス2−エチルヘキサノエート(3G8)27.5wt%、ポリビニルアセタール樹脂として樹脂1を残量として合計100重量%の組成物を入れて、二軸延伸器を用いて200℃で押出して、Tダイでキャストした後、厚さ760umの単層中間膜であるシート1〜シート3を得た。
上記の3)樹脂の含量検出と同じ方式で分析を行い、且つ樹脂の場合とは異なって、シートは、約0.5gの試料を分析に適用した。
TD−GC/MSを利用して接合用フィルム内のブタナール由来反応副産物を分析した。実施例および比較例で製造されたフィルムをそれぞれ0.5gずつ取って、TD(JAI社JTD−505III)内の第1加熱脱着部と第2加熱脱着部を通過させた。温度は、150℃(PAT)、−40℃(cold trap)で、PAT加熱時間は15分を、SAT脱着時間は3分を適用した。分割比(Split ratio)は、1/50を適用した。
ASTM E313に基づいてポリビニルアセタールフィルム(シート1〜3)の黄色指数(Y.I)を測定した。具体的に、離型フィルム−シート−離型フィルム(シリコンコートPET)の積層構造でラミネータにて150℃の温度で15分間加熱加圧を通じて接合して試験片を製作し、試験片から離型フィルムを除去した後、HunterLab社の測定機を利用して400〜800nmの条件で測定して、その結果を下記の表1に示した。
(d−YI評価方法)
KS M ISO 4892−3:2002に基づいて接合ガラスの促進耐候性試験を進め、d−YI(黄色度の差)を基準として耐久性を評価した
(耐貫通性の評価)
KS L 2007に基づいて接合ガラスの耐貫通性を評価した。
300mm×300mmの厚さ2.1cmのガラスと上記のシート1〜3を中間膜にそれぞれ適用して、ガラス−中間膜−ガラスの積層構造で製造し、真空で予備接合して、脱気およびエッチシール(Edge sealing)した。その後、高圧滅菌器(autoclave)を利用して150℃で2時間本接合を行い、試験片を製作した。その後、2.26kgの鋼球を前記試験片に落球させて、試験片が貫通される高さ(MBH)を測定した。この際、高さ4m未満で貫通される場合は、Fail、4m以上の高さで貫通される場合は、Passで表記した。
KS L 2007:2008に基づいて耐衝撃性を評価するとき、接合ガラスの欠落有無を評価した。
Claims (10)
- ポリビニルアセタール、アルデヒドおよびアルカノールを含み、
前記アルデヒド100重量部を基準として前記アルカノールを50重量部以上で含有する、ポリビニルアセタール樹脂組成物。 - 前記アルデヒドは、n−ブタナールを含み、前記アルカノールは、2−エチルヘキサノールを含む、請求項1に記載のポリビニルアセタール樹脂組成物。
- 前記ポリビニルアセタールは、ポリビニルアルコールと前記アルデヒドのアセタール化反応により製造される、請求項1に記載のポリビニルアセタール樹脂組成物。
- 前記ポリビニルアセタールは、水酸基の含有量が30モル%以上であり、アセチル基の含有量が2モル%未満である第1ポリビニルアセタールである、請求項1に記載のポリビニルアセタール樹脂組成物。
- 前記ポリビニルアセタールは、水酸基の含有量が40モル%以下であり、アセチル基の含有量が8モル%以上である第2ポリビニルアセタールである、請求項1に記載のポリビニルアセタール樹脂組成物。
- 第1ポリビニルアセタール、アルデヒドおよび可塑剤を含む第1層を備え、
前記第1層は、i)前記アルデヒドとii)前記アルデヒドに由来する反応生成物を含み、前記第1層に含まれるアルカン酸の含量は、i)前記アルデヒドおよびii)前記アルデヒドの反応生成物の総和である基準物質の全体を基準として2.0重量%以下である、接合用中間膜。 - 前記第1層は、前記反応生成物としてアルカノールを含む、請求項6に記載の接合用中間膜。
- 前記第1層は、黄色度指数が3.0以下であることである、請求項6に記載の接合用中間膜。
- 前記アルデヒドは、n−ブタナールを含み、前記アルカン酸は、2−エチルヘキサン酸を含み、
前記基準物質は、i)前記n−ブタナール、ii)前記2−エチルヘキサン酸、およびiii)2−エチル−2−ヘキサナール、2−エチルヘキサナール、2−エチルヘキサノールおよびこれらの組合せよりなる群から選択されたいずれか一つを含む、請求項6に記載の接合用中間膜。 - 請求項6に記載の接合用中間膜の一面上に位置する第1ガラスと前記中間膜の他面上に位置する第2ガラスとを含む積層体を備える、接合ガラス。
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US (1) | US20190345275A1 (ja) |
JP (1) | JP2019196472A (ja) |
KR (1) | KR102097205B1 (ja) |
CN (2) | CN110452485A (ja) |
DE (1) | DE102018220843A1 (ja) |
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WO2022265078A1 (ja) * | 2021-06-18 | 2022-12-22 | 積水化学工業株式会社 | ポリビニルアセタール系樹脂フィルム |
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CN118324953A (zh) * | 2023-01-10 | 2024-07-12 | 浙江德斯泰新材料股份有限公司 | 光伏用高流动性聚乙烯醇缩醛树脂及其制备方法和在光伏封装膜中的应用 |
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- 2018-12-03 DE DE102018220843.3A patent/DE102018220843A1/de active Pending
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US20190345275A1 (en) | 2019-11-14 |
CN114644800A (zh) | 2022-06-21 |
KR102097205B1 (ko) | 2020-04-03 |
KR20190128318A (ko) | 2019-11-18 |
CN110452485A (zh) | 2019-11-15 |
DE102018220843A1 (de) | 2019-11-14 |
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