JP2008120952A - 架橋性エチレン共重合体組成物、該共重合体組成物からなる太陽電池素子封止用シートおよびこれを用いた太陽電池モジュール - Google Patents
架橋性エチレン共重合体組成物、該共重合体組成物からなる太陽電池素子封止用シートおよびこれを用いた太陽電池モジュール Download PDFInfo
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- JP2008120952A JP2008120952A JP2006308380A JP2006308380A JP2008120952A JP 2008120952 A JP2008120952 A JP 2008120952A JP 2006308380 A JP2006308380 A JP 2006308380A JP 2006308380 A JP2006308380 A JP 2006308380A JP 2008120952 A JP2008120952 A JP 2008120952A
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- ethylene copolymer
- copolymer composition
- solar cell
- crosslinkable
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- 239000000203 mixture Substances 0.000 title claims abstract description 63
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- 239000005977 Ethylene Substances 0.000 claims description 30
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- 238000004132 cross linking Methods 0.000 claims description 13
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- 239000000654 additive Substances 0.000 claims description 8
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- 229920003145 methacrylic acid copolymer Polymers 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- ZQBAKBUEJOMQEX-UHFFFAOYSA-N phenyl salicylate Chemical compound OC1=CC=CC=C1C(=O)OC1=CC=CC=C1 ZQBAKBUEJOMQEX-UHFFFAOYSA-N 0.000 description 2
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- 229920001567 vinyl ester resin Polymers 0.000 description 2
- HGTUJZTUQFXBIH-UHFFFAOYSA-N (2,3-dimethyl-3-phenylbutan-2-yl)benzene Chemical group C=1C=CC=CC=1C(C)(C)C(C)(C)C1=CC=CC=C1 HGTUJZTUQFXBIH-UHFFFAOYSA-N 0.000 description 1
- SYXTYIFRUXOUQP-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy butaneperoxoate Chemical compound CCCC(=O)OOOC(C)(C)C SYXTYIFRUXOUQP-UHFFFAOYSA-N 0.000 description 1
- OXYKVVLTXXXVRT-UHFFFAOYSA-N (4-chlorobenzoyl) 4-chlorobenzenecarboperoxoate Chemical compound C1=CC(Cl)=CC=C1C(=O)OOC(=O)C1=CC=C(Cl)C=C1 OXYKVVLTXXXVRT-UHFFFAOYSA-N 0.000 description 1
- VNFXPOAMRORRJJ-UHFFFAOYSA-N (4-octylphenyl) 2-hydroxybenzoate Chemical compound C1=CC(CCCCCCCC)=CC=C1OC(=O)C1=CC=CC=C1O VNFXPOAMRORRJJ-UHFFFAOYSA-N 0.000 description 1
- RIPYNJLMMFGZSX-UHFFFAOYSA-N (5-benzoylperoxy-2,5-dimethylhexan-2-yl) benzenecarboperoxoate Chemical compound C=1C=CC=CC=1C(=O)OOC(C)(C)CCC(C)(C)OOC(=O)C1=CC=CC=C1 RIPYNJLMMFGZSX-UHFFFAOYSA-N 0.000 description 1
- IMYCVFRTNVMHAD-UHFFFAOYSA-N 1,1-bis(2-methylbutan-2-ylperoxy)cyclohexane Chemical compound CCC(C)(C)OOC1(OOC(C)(C)CC)CCCCC1 IMYCVFRTNVMHAD-UHFFFAOYSA-N 0.000 description 1
- NALFRYPTRXKZPN-UHFFFAOYSA-N 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane Chemical compound CC1CC(C)(C)CC(OOC(C)(C)C)(OOC(C)(C)C)C1 NALFRYPTRXKZPN-UHFFFAOYSA-N 0.000 description 1
- MSAHTMIQULFMRG-UHFFFAOYSA-N 1,2-diphenyl-2-propan-2-yloxyethanone Chemical compound C=1C=CC=CC=1C(OC(C)C)C(=O)C1=CC=CC=C1 MSAHTMIQULFMRG-UHFFFAOYSA-N 0.000 description 1
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- XSZYESUNPWGWFQ-UHFFFAOYSA-N 1-(2-hydroperoxypropan-2-yl)-4-methylcyclohexane Chemical compound CC1CCC(C(C)(C)OO)CC1 XSZYESUNPWGWFQ-UHFFFAOYSA-N 0.000 description 1
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- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- LHPPDQUVECZQSW-UHFFFAOYSA-N 2-(benzotriazol-2-yl)-4,6-ditert-butylphenol Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC(N2N=C3C=CC=CC3=N2)=C1O LHPPDQUVECZQSW-UHFFFAOYSA-N 0.000 description 1
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- ZPOLOEWJWXZUSP-WAYWQWQTSA-N bis(prop-2-enyl) (z)-but-2-enedioate Chemical compound C=CCOC(=O)\C=C/C(=O)OCC=C ZPOLOEWJWXZUSP-WAYWQWQTSA-N 0.000 description 1
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 1
- 239000001055 blue pigment Substances 0.000 description 1
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- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
- B32B17/10788—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing ethylene vinylacetate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
- B32B17/10688—Adjustment of the adherence to the glass layers
Landscapes
- Joining Of Glass To Other Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Photovoltaic Devices (AREA)
Abstract
【解決手段】 エチレン共重合体100重量部に対し、二重結合を有するジアルコキシシランを3重量部以下の割合で配合してなる架橋性エチレン共重合体組成物、並びにそれを用いた架橋シート、太陽電池封止シート及び太陽電池モジュール
【選択図】 なし
Description
本発明者らは、本発明出願人が提案した架橋性エチレン共重合体組成物の優れた性能を維持しながら、接着性の経時的低下が少ない架橋性エチレン共重合体組成物の開発を行った結果、本発明に到達したものである。
本発明はまた、太陽電池封止用に好適な前記特徴を有する架橋性エチレン共重合体組成物を提供することを目的とする。
本発明の目的はまた、架橋性エチレン共重合体組成物の架橋シート、それを用いた太陽電池封止シート並びに太陽電池モジュールをも提供することにある。
本発明によれば、すぐれた性能を有する架橋性エチレン共重合体組成物からなる太陽電池封止用架橋性エチレン共重合体組成物が提供される。
本発明によればまた、すぐれた性能を有する架橋性エチレン共重合体組成物の架橋シート、それを用いた太陽電池封止シート並びに太陽電池モジュールをも提供する。
極性モノマーとしては、酢酸ビニル、プロピオン酸ビニルのようなビニルエステル、アクリル酸メチル、アクリル酸エチル、アクリル酸イソプロピル、アクリル酸イソブチル、アクリル酸n−ブチル、アクリル酸イソオクチル、メタクリル酸メチル、メタクリル酸イソブチル、マレイン酸ジメチル等の不飽和カルボン酸エステル、アクリル酸、メタクリル酸、フマル酸、イタコン酸、マレイン酸モノメチル、マレイン酸モノエチル、無水マレイン酸、無水イタコン酸等の不飽和カルボン酸、これら不飽和カルボン酸の塩、一酸化炭素、二酸化硫黄などの一種又は二種以上などを例示することができる。不飽和カルボン酸の塩としては、リチウム、ナトリウム、カリウムなどの1価金属、マグネシウム、カルシウム、亜鉛などの多価金属の塩などを挙げることができる。
エチレン含量が65〜95重量%、好ましくは70〜90重量%、不飽和カルボン酸含量が2〜20重量%、好ましくは5〜20重量%、中和度が90%以下、好ましくは80%以下のものが好ましい。
このようなパーオキサイドとして例えば第3ブチルパーオキシイソプロピルカーボネート、第3ブチルパーオキシ−2−エチルヘキシルイソプロピルカーボネート、第3ブチルパーオキシアセテート、第3ブチルパーオキシベンゾエート、第3ブチルクミルパーオキサイド、ジクミルパーオキサイド、2,5−ジメチル−2,5−ビス(第3ブチルパーオキシ)ヘキサン、ジ第3ブチルパーオキサイド、1,3−ビス(2−第3ブチルパーオキシイソプロピル)ベンゼン、2,5−ジメチル−2,5−ビス(ベンゾイルパーオキシ)ヘキサン、2,5−ジメチル−2,5−ビス(第3ブチルパーオキシ)ヘキシン−3、1,1−ビス(第3ブチルパーオキシ)−3,3,5−トリメチルシクロヘキサン、1,1−ビス(第3ブチルパーオキシ)シクロヘキサン、1,1−ビス(第3アミルパーオキシ)シクロヘキサン、2,2−ビス(第3ブチルパーオキシ)ブタン、メチルエチルケトンパーオキサイド、2,5−ジメチルヘキシル−2,5−ビスパーオキシベンゾエート、第3ブチルハイドロパーオキサイド、p−メンタンハイドロパーオキサイド、ベンゾイルパーオキサイド、p−クロルベンゾイルパーオキサイド、第3ブチルパーオキシイソブチレート、n−ブチル−4,4−ビス(第3ブチルパーオキシ)バレレート、エチル−3,3−ビス(第3ブチルパーオキシ)ブチレート、ヒドロキシヘプチルパーオキサイド、ジクロヘキサノンパーオキサイドなどが挙げられる。架橋剤はエチレン共重合体100重量部に対し、0.1〜5重量部、とくに0.5〜3重量部の割合で配合するのが効果的である。
架橋性エチレン共重合体組成物が太陽電池封止材として用いられる場合、例えば変色防止剤として、カドミウム、バリウム等の金属の脂肪酸塩を配合することができる。また下部保護材側の封止材においては、透明性は要求されないので、着色、発電効率向上などの目的で、顔料、染料、無機充填剤などを配合することができる。例えば酸化チタン、炭酸カルシウムなどの白色顔料、ウルトラマリンなどの青色顔料、カーボンブラックのような黒色顔料などのほか、ガラスビーズや光拡散剤などを例示することができる。とくに酸化チタンのような無機顔料を配合する系に本発明を適用すると、絶縁抵抗低下の防止効果が優れているので好ましい。無機顔料の好適な配合量は、エチレン・極性モノマー共重合体100重量部に対し、100重量部以下、好ましくは0.5〜50重量部、特に好ましくは4〜50重量部である。
実施例及び比較例で用いた原料及び物性評価方法を以下に示す。
(1)EVA樹脂:エチレン・酢酸ビニル共重合体(酢酸ビニル含量:28重量%、MFR:15g/10分)
(2)架橋剤:2,5−ジメチル−2,5−ジ(t−ブチルパーオキシ)ヘキサン、1時間半減期温度140℃)
(3)シランカップリング剤(1):3−メタクリロキシプロピルトリメトキシシラン
(4)シランカップリング剤(2):3−メタクリロキシプロピルメチルジメトキシシラン
(1)青色ガラス:厚み3mm、サイズ7.5cm×12cm
(2)バックシート:PET系バックシート(東洋アルミニウム社製)
(1)条件1:40℃×90%RHで1週間
(2)条件2:40℃×90%RHで2週間
(3)条件3:23℃×50%RHで1ヶ月
(4)条件4:23℃×50%RHで2ヶ月
上記EVA樹脂5000g、架橋剤60g及びシランカップリング剤(2)25gをそれぞれ秤量し混合した。含浸させるため一昼夜放置した。得られた含浸ペレットを、押出機(L/D=26、フルフライトスクリュー、圧縮比2.6)を用いて加工温度100℃にて混練して、均一な厚み0.6mmのシートとした。得られた架橋性シートを用いて、上記保管条件(1)〜(4)で保管後、ガラス基板との接着強度を測定した。結果を表1に示す。
実施例1において、シランカップリング剤(2)を、シランカップリング剤(1)のに変更した以外は、実施例1と同様にして、ガラス基板との接着強度を測定した。結果を表1に示す。
Claims (13)
- エチレン共重合体100重量部に対し、二重結合を有するジアルコキシシランを3重量部以下の割合で配合してなる架橋性エチレン共重合体組成物。
- エチレン共重合体が、エチレン・酢酸ビニル共重合体、エチレン・不飽和カルボン酸エステル共重合体、エチレン・不飽和カルボン酸共重合体及びエチレン・不飽和カルボン酸共重合体のアイオノマーから選ばれる少なくとも1種である請求項1に記載の架橋性エチレン共重合体組成物。
- エチレン共重合体が、酢酸ビニルを10〜40重量%含有するエチレン・酢酸ビニル共重合体である請求項2に記載の架橋性エチレン共重合体組成物。
- 二重結合を有するジアルコキシシランが、3−(メタ)アクリロキシプロピルジアルコキシシランである請求項1〜3のいずれかに記載の架橋性エチレン共重合体組成物。
- 1時間半減期温度が140℃以下のパーオキサイドが配合されている請求項1〜4のいずれかに記載の架橋性エチレン共重合体組成物。
- さらにアリル基を含有する架橋助剤が配合されてなる請求項1〜5のいずれかに記載の架橋性エチレン共重合体組成物。
- 架橋助剤が、トリアリルイソシアヌレートまたはトリアリルシアヌレートである請求項6に記載の架橋性エチレン共重合体組成物。
- さらに紫外線吸収剤、光安定剤および酸化防止剤から選ばれる耐候安定剤添加剤が配合されてなる請求項1〜7記載の架橋性エチレン共重合体組成物。
- 請求項1〜8のいずれかに記載の架橋性エチレン共重合体組成物からなる太陽電池素子封止用架橋性エチレン共重合体組成物。
- 請求項1〜9のいずれかに記載の架橋性エチレン共重合体組成物からなる架橋性シート。
- 請求項1〜9のいずれかに記載の架橋性エチレン共重合体組成物からなる太陽電池素子封止用架橋性シート
- 請求項1〜11のいずれかに記載の架橋性エチレン共重合体組成物またはシートを架橋してなる太陽電池素子封止シート。
- 請求項12に記載された架橋シートを用いた太陽電池モジュール。
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