JP2010254989A5

JP2010254989A5 -

Info

Publication number: JP2010254989A5
Application number: JP2010082657A
Authority: JP
Filing date: 2010-03-31
Publication date: 2012-12-06
Anticipated expiration: 2030-03-31

Description

即ち、本発明の第１の発明によれば、下記の成分（Ａ）及び成分（Ｂ）を含有することを特徴とする太陽電池封止材用樹脂組成物が提供される。
成分（Ａ）：下記（ａ１）〜（ａ５）の特性を有するエチレン・α−オレフィン共重合体
（ａ１）密度が０．８６０〜０．９２０ｇ／ｃｍ^３
（ａ２）ゲルパーミエーションクロマトグラフィー（ＧＰＣ）により求めたＺ平均分子量（Ｍｚ）と数平均分子量（Ｍｎ）との比（Ｍｚ／Ｍｎ）が８．０以下
（ａ３）１００℃で測定した、せん断速度が２．４３×１０ｓ^−１での溶融粘度（η^＊ _１）が９．０×１０^４ｐｏｉｓｅ以下
（ａ４）１００℃で測定した、せん断速度が２．４３×１０^２ｓ^−１での溶融粘度（η^＊ _２）が１．８×１０^４ｐｏｉｓｅ以下
（ａ５）ポリマー中のコモノマーによる分岐数（Ｎ）が下記式（ａ）を満たす。
式（ａ）：Ｎ ≧ −０．６７×Ｅ＋５３
（ただし、Ｎは、ＮＭＲで測定した主鎖、側鎖の合計１０００個の炭素数あたりの分岐数であり、Ｅは、ＩＳＯ１１８４−１９８３に準拠して測定した、シートの引張弾性率である。）
成分（Ｂ）：有機過酸化物 That is, according to 1st invention of this invention, the resin composition for solar cell sealing materials characterized by containing the following component (A) and component (B) is provided.
Component (A): ethylene / α-olefin copolymer (a1) having the following properties (a1) to (a5): Density of 0.860 to 0.920 g / cm ³
(A2) The ratio (Mz / Mn) of Z average molecular weight (Mz) and number average molecular weight (Mn) determined by gel permeation chromatography (GPC) was 8.0 or less (a3) Shear measured at 100 ° C. rate melt viscosity at ^{^{_{2.43 × 10s -1 (η * 1}}} ) was measured at 9.0 × ¹⁰ 4 poise or less (a4) 100 ℃, shear rate at 2.43 × ¹⁰ 2 ^{s -1} Melt viscosity (η ^* ₂ ) is 1.8 × 10 ⁴ poise or less (a5) The number of branches (N) due to the comonomer in the polymer satisfies the following formula (a).
Formula (a): N ≧ −0.67 × E + 53
(Where N is the number of branches per 1000 carbon atoms in total of the main chain and side chain measured by NMR, and E is the tensile modulus of the sheet measured in accordance with ISO 1184-1983.) )
Component (B): Organic peroxide

また、本発明の第２の発明によれば、第１の発明において、（ａ５）ポリマー中のコモノマーによる分岐数（Ｎ）が、下記式（ａ’）を満たすことを特徴とする太陽電池封止材用樹脂組成物が提供される。
式（ａ’）： −０．６７×Ｅ＋８０ ≧ Ｎ ≧ −０．６７×Ｅ＋５３
（ただし、Ｎは、ＮＭＲで測定した主鎖、側鎖の合計１０００個の炭素数あたりの分岐数であり、Ｅは、ＩＳＯ１１８４−１９８３に準拠して測定した、シートの引張弾性率である。） Further, according to the second aspect of the present invention, in a first aspect, (a5) the number of branches by the comonomer in the polymer (N) is, the solar cell sealing, characterized by satisfying the following formulas (a ') A resin composition for a stopper is provided.
Formula (a ′): −0.67 × E + 80 ≧ N ≧ −0.67 × E + 53
(Where N is the number of branches per 1000 carbon atoms in total of the main chain and side chain measured by NMR, and E is the tensile modulus of the sheet measured in accordance with ISO 1184-1983.) )

また、本発明の第３の発明によれば、下記の成分（Ａ）及び成分（Ｂ）を含有することを特徴とする太陽電池封止材用樹脂組成物が提供される。
成分（Ａ）：下記（ａ１）〜（ａ４）及び（ａ６）の特性を有するエチレン・α−オレフィン共重合体
（ａ１）密度が０．８６０〜０．９２０ｇ／ｃｍ^３
（ａ２）ゲルパーミエーションクロマトグラフィー（ＧＰＣ）により求めたＺ平均分子量（Ｍｚ）と数平均分子量（Ｍｎ）との比（Ｍｚ／Ｍｎ）が８．０以下
（ａ３）１００℃で測定した、せん断速度が２．４３×１０ｓ^−１での溶融粘度（η^＊ _１）が９．０×１０^４ｐｏｉｓｅ以下
（ａ４）１００℃で測定した、せん断速度が２．４３×１０^２ｓ^−１での溶融粘度（η^＊ _２）が１．８×１０^４ｐｏｉｓｅ以下
（ａ６）フローレシオ（ＦＲ）：１９０℃における１０ｋｇ荷重でのＭＦＲ測定値であるＩ_１０と、１９０℃における２．１６ｋｇ荷重でのＭＦＲ測定値であるＩ_２．１６との比（Ｉ_１０／Ｉ_２．１６）が７．０未満
成分（Ｂ）：有機過酸化物 Moreover, according to the 3rd invention of this invention, the resin composition for solar cell sealing materials characterized by containing the following component (A) and component (B) is provided.
Component (A): ethylene / α-olefin copolymer (a1) having the following characteristics (a1) to (a4) and (a6): density is 0.860 to 0.920 g / cm ³
(A2) The ratio (Mz / Mn) of Z average molecular weight (Mz) and number average molecular weight (Mn) determined by gel permeation chromatography (GPC) was 8.0 or less (a3) Shear measured at 100 ° C. rate melt viscosity at ^{^{_{2.43 × 10s -1 (η * 1}}} ) was measured at 9.0 × ¹⁰ 4 poise or less (a4) 100 ℃, shear rate at 2.43 × ¹⁰ 2 ^{s -1} Melt viscosity (η ^* ₂ ) is 1.8 × 10 ⁴ poise or less (a6) Flow ratio (FR): I10 which is MFR measurement value at ₁₀ ° C. load at 190 ° C. and 2.16 kg load at 190 ° C. Ratio (I ₁₀ / I _2.16 ) with I _2.16 which is MFR measurement value is less than 7.0 Component (B): Organic peroxide

また、本発明の第４の発明によれば、第３の発明において、さらに、特性（ａ６）のフローレシオ（ＦＲ）が、５．０〜６．２であることを特徴とする太陽電池封止材用樹脂組成物が提供される。
また、本発明の第５の発明によれば、第１〜４のいずれかの発明において、成分（Ｂ）の含有量が、成分（Ａ）１００重量部に対して、０．２〜５重量部であることを特徴とする太陽電池封止材用樹脂組成物が提供される。
また、本発明の第６の発明によれば、第１〜５のいずれかの発明において、さらに、下記の成分（Ｃ）を含有することを特徴とする太陽電池封止材用樹脂組成物が提供される。
成分（Ｃ）：ヒンダードアミン系光安定化剤 Further, according to the fourth aspect of the present invention, in the third invention, further, the flow ratio of the characteristic (a6) (FR) The solar cell sealing, which is a 5.0 to 6.2 A resin composition for a stopper is provided.
According to the fifth aspect of the present invention, in any one of the first to fourth aspects, the content of the component (B) is 0.2 to 5 parts by weight with respect to 100 parts by weight of the component (A). The resin composition for solar cell sealing materials characterized by being a part is provided.
According to a sixth invention of the present invention, in any one of the first to fifth inventions, there is further provided a resin composition for a solar cell encapsulant further comprising the following component (C): Provided.
Component (C): Hindered amine light stabilizer

また、本発明の第７の発明によれば、第１〜６のいずれかの発明において、成分（Ａ）が、エチレン・１−ブテン共重合体、又はエチレン・１−ヘキセン共重合体であることを特徴とする太陽電池封止材用樹脂組成物が提供される。
また、本発明の第８の発明によれば、第１〜７のいずれかの発明において、太陽電池封止材用樹脂組成物をペレット化し、あるいはシート化してなる太陽電池封止材が提供される。 According to the seventh invention of the present invention, in any one of the first to sixth inventions, the component (A) is an ethylene / 1-butene copolymer or an ethylene / 1-hexene copolymer. The resin composition for solar cell sealing materials characterized by this is provided.
Moreover, according to the eighth invention of the present invention, there is provided a solar cell encapsulant obtained by pelletizing or sheeting a resin composition for a solar cell encapsulant in any one of the first to seventh inventions. The

本発明の太陽電池封止材用樹脂組成物は、特定の密度、分子量分布、溶融粘度特性を有するエチレン・α−オレフィン共重合体を主成分とし、これに有機過酸化物を配合しているため、この樹脂組成物をシート化する際には、エチレン・α−オレフィン共重合体が比較的短時間で架橋して十分な接着力を有し、剛性と架橋効率とのバランスもよく、太陽電池封止材としてモジュールの形成が容易であり、製造コストを低減することができる。また、得られた太陽電池モジュールは、透明性、柔軟性、耐候性等に優れるものとなり、長期間安定した変換効率を維持することが期待できる。 The resin composition for a solar cell encapsulant of the present invention is mainly composed of an ethylene / α-olefin copolymer having a specific density, molecular weight distribution, and melt viscosity characteristics, and an organic peroxide is blended therein. Therefore, when this resin composition is made into a sheet, the ethylene / α-olefin copolymer is crosslinked in a relatively short time and has sufficient adhesive force, and the balance between rigidity and crosslinking efficiency is well balanced. The module can be easily formed as the battery sealing material, and the manufacturing cost can be reduced. Moreover, the obtained solar cell module becomes excellent in transparency, flexibility, weather resistance, etc., and it can be expected to maintain stable conversion efficiency for a long period of time.

１．太陽電池封止材用樹脂組成物
本発明の太陽電池封止材用樹脂組成物（以下、単に樹脂組成物ともいう）は、下記のエチレン・α−オレフィン共重合体成分（Ａ）及び有機過酸化物成分（Ｂ）を含有することを特徴とする。 1. Solar cell encapsulant resin composition solar cell encapsulant resin composition of the present invention (hereinafter, simply referred to as resin composition) over the ethylene · alpha-olefin copolymer component (A) and organic below It contains an oxide component (B).

本発明の太陽電池封止材用樹脂組成物は、各種用途に利用でき用途によって限定されるものではないが、耐熱性、透明性、柔軟性等に優れるため、屋外での使用に特に適しており、例えば太陽電池封止材等に好適である。 The resin composition for a solar cell encapsulant of the present invention can be used for various applications and is not limited by the application, but is particularly suitable for outdoor use because of its excellent heat resistance, transparency, flexibility and the like. For example, it is suitable for a solar cell sealing material.

本発明の太陽電池封止材用樹脂組成物は、透明性、柔軟性、剛性と架橋効率のバランス、耐候性等が要求される太陽電池封止材として利用される。 The resin composition for a solar cell encapsulant of the present invention is used as a solar cell encapsulant that requires transparency, flexibility, rigidity and balance of crosslinking efficiency, weather resistance, and the like.

Claims

The resin composition for solar cell sealing materials characterized by containing the following component (A) and a component (B).
Component (A): ethylene / α-olefin copolymer (a1) having the following properties (a1) to (a5): Density of 0.860 to 0.920 g / cm ³
(A2) The ratio (Mz / Mn) of Z average molecular weight (Mz) and number average molecular weight (Mn) determined by gel permeation chromatography (GPC) was 8.0 or less (a3) Shear measured at 100 ° C rate melt viscosity at ^{^{_{2.43 × 10s -1 (η * 1}}} ) was measured at 9.0 × ¹⁰ 4 poise or less (a4) 100 ℃, shear rate at 2.43 × ¹⁰ 2 ^{s -1} Melt viscosity (η ^* ₂ ) is 1.8 × 10 ⁴ poise or less (a5) The number of branches (N) due to the comonomer in the polymer satisfies the following formula (a).
Formula (a): N ≧ −0.67 × E + 53
(Where N is the number of branches per 1000 carbon atoms in total of the main chain and side chain measured by NMR, and E is the tensile modulus of the sheet measured in accordance with ISO 1184-1983.) )
Component (B): Organic peroxide

(A5) The number of branches (N) due to the comonomer in the polymer satisfies the following formula (a ′): The resin composition for a solar cell encapsulant according to claim 1.
Formula (a ′): −0.67 × E + 80 ≧ N ≧ −0.67 × E + 53
(Where N is the number of branches per 1000 carbon atoms in total of the main chain and side chain measured by NMR, and E is the tensile modulus of the sheet measured in accordance with ISO 1184-1983.) )

The resin composition for solar cell sealing materials characterized by containing the following component (A) and a component (B).
Component (A): ethylene / α-olefin copolymer (a1) having the following characteristics (a1) to (a4) and (a6): density is 0.860 to 0.920 g / cm ³
(A2) The ratio (Mz / Mn) of Z average molecular weight (Mz) and number average molecular weight (Mn) determined by gel permeation chromatography (GPC) was 8.0 or less (a3) Shear measured at 100 ° C. rate melt viscosity at ^{^{_{2.43 × 10s -1 (η * 1}}} ) was measured at 9.0 × ¹⁰ 4 poise or less (a4) 100 ℃, shear rate at 2.43 × ¹⁰ 2 ^{s -1} Melt viscosity (η ^* ₂ ) is 1.8 × 10 ⁴ poise or less (a6) Flow ratio (FR): I10 which is MFR measurement value at ₁₀ ° C. load at 190 ° C. and 2.16 kg load at 190 ° C. Ratio (I ₁₀ / I _2.16 ) with I _2.16 which is MFR measurement value is less than 7.0 Component (B): Organic peroxide

The flow ratio (FR) of the characteristic (a6) is 5.0 to 6.2, The resin composition for a solar cell encapsulant according to claim 3.

Content of a component (B) is 0.2-5 weight part with respect to 100 weight part of components (A), The solar cell sealing material in any one of Claims 1-4 characterized by the above-mentioned. Resin composition.

Furthermore, the following component (C) is contained, The resin composition for solar cell sealing materials in any one of Claims 1-5 Component (C): Hindered amine light stabilizer

The component (A) is ethylene / 1-butene or ethylene / 1-hexene copolymer, and the resin composition for a solar cell encapsulant according to any one of claims 1 to 6.

The solar cell sealing material formed by pelletizing the resin composition for solar cell sealing materials in any one of Claims 1-7 , or making it into a sheet .