JPWO2015068691A1 - Adhesive film, solar cell encapsulant, solar cell module, interlayer film for laminated glass and laminated glass - Google Patents

Adhesive film, solar cell encapsulant, solar cell module, interlayer film for laminated glass and laminated glass Download PDF

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JPWO2015068691A1
JPWO2015068691A1 JP2015546644A JP2015546644A JPWO2015068691A1 JP WO2015068691 A1 JPWO2015068691 A1 JP WO2015068691A1 JP 2015546644 A JP2015546644 A JP 2015546644A JP 2015546644 A JP2015546644 A JP 2015546644A JP WO2015068691 A1 JPWO2015068691 A1 JP WO2015068691A1
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solar cell
sealing material
laminated glass
adhesive film
silane coupling
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斉 杉山
斉 杉山
しのぶ 日高
しのぶ 日高
純弥 河邉
純弥 河邉
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CI Kasei Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/10—Adhesives in the form of films or foils without carriers
    • 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
    • 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
    • B32B17/10009—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 number, the constitution or treatment of glass sheets
    • B32B17/10036—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 number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • 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
    • B32B17/10678—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 comprising UV absorbers or stabilizers, e.g. antioxidants
    • 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
    • B32B17/10697—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 being cross-linked
    • 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
    • B32B17/10788—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
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/005—Stabilisers against oxidation, heat, light, ozone
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0041—Optical brightening agents, organic pigments
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/54—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/322—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of solar panels
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
    • C09J2301/408—Additional features of adhesives in the form of films or foils characterized by the presence of essential components additives as essential feature of the adhesive layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Abstract

本発明は、封止用樹脂と、シランカップリング剤と、ｐＫｂが５〜１２の塩基性化合物と、を含む接着フィルム及び太陽電池用封止材を開示している。また、本発明は、太陽電池セル（１１）と、太陽電池セル（１１）を挟持した一対の太陽電池用封止材（１２）とを備え、太陽電池用封止材（１２）が本発明の太陽電池用封止材である太陽電池モジュール（１０）を開示している。The present invention discloses an adhesive film and a solar cell encapsulant containing an encapsulating resin, a silane coupling agent, and a basic compound having a pKb of 5 to 12. Moreover, this invention is equipped with a photovoltaic cell (11) and a pair of sealing material for solar cells (12) which clamped the photovoltaic cell (11), and the sealing material for solar cells (12) is this invention. The solar cell module (10) which is the sealing material for solar cells of this is disclosed.

Description

本発明は、接着フィルム、太陽電池用封止材、太陽電池モジュール、合わせガラス用中間膜及び合わせガラスに関する。
本願は、２０１３年１１月５日に日本に出願された特願２０１３−２２９６６５号に基づき優先権を主張し、その内容をここに援用する。The present invention relates to an adhesive film, a solar cell sealing material, a solar cell module, an interlayer film for laminated glass, and a laminated glass.
This application claims priority based on Japanese Patent Application No. 2013-229665 for which it applied to Japan on November 5, 2013, and uses the content here.

太陽電池モジュールにおいては、太陽電池セルを封止して固定するために、透明性、加工性、架橋性に優れたエチレン−極性基含有モノマー共重合体（エチレン−酢酸ビニル共重合体等）等の封止用樹脂で形成された太陽電池用封止材（以下、単に封止材ともいう。）が広く用いられている。また、封止材には、太陽電池モジュールの表面側に配置されるガラス板等の透明保護材や、バックシート等との接着性を高める目的で、シランカップリング剤が配合されることが多い（例えば、特許文献１）。   In a solar cell module, an ethylene-polar group-containing monomer copolymer (ethylene-vinyl acetate copolymer, etc.) excellent in transparency, workability, and crosslinkability, etc. for sealing and fixing solar cells. A sealing material for solar cells (hereinafter also simply referred to as a sealing material) formed of a sealing resin is widely used. In addition, a silane coupling agent is often blended in the sealing material for the purpose of enhancing the adhesiveness with a transparent protective material such as a glass plate disposed on the surface side of the solar cell module or a back sheet. (For example, patent document 1).

しかし、シランカップリング剤を配合した封止材においては、保管時に、封止用樹脂中又は空気中の水分によってシランカップリング剤が加水分解し、さらに縮合反応を引き起こすことで変質しやすい。シランカップリング剤が加水分解や縮合によって変質すると、封止用樹脂の架橋特性が設計通りにならなかったり、シラノール基が減少して封止材の接着性が低下したりする問題がある。   However, in a sealing material containing a silane coupling agent, the silane coupling agent is hydrolyzed by moisture in the sealing resin or in the air during storage, and is easily deteriorated by causing a condensation reaction. When the silane coupling agent is altered by hydrolysis or condensation, there are problems that the cross-linking characteristics of the sealing resin are not as designed, or the silanol groups are reduced and the adhesiveness of the sealing material is lowered.

保管時の加水分解及び縮合を抑制できるシランカップリング剤として、縮合反応部位の構造、配位数を調節して縮合反応の速度を低下させたシランカップリング剤が提案されている（特許文献２）。しかし、前記シランカップリング剤では、充分な接着性を有する封止材を得ることが難しい。   As a silane coupling agent that can suppress hydrolysis and condensation during storage, a silane coupling agent has been proposed in which the structure and coordination number of the condensation reaction site are adjusted to reduce the rate of the condensation reaction (Patent Document 2). ). However, with the silane coupling agent, it is difficult to obtain a sealing material having sufficient adhesion.

日本国特開２０００−１７４２９６号公報Japanese Unexamined Patent Publication No. 2000-174296 日本国特開２００８−１２０９５２号公報Japanese Unexamined Patent Publication No. 2008-120952

本発明は、シランカップリング剤が変質しにくく、長期保管後であっても良好な接着性を有する接着フィルム、太陽電池用封止材、及び前記太陽電池用封止材を用いた太陽電池モジュールを提供する。
また、接着フィルムからなる合わせガラス用中間膜、及び合わせガラスを提供する。The present invention relates to an adhesive film, a solar cell encapsulant, and a solar cell module using the solar cell encapsulant that have a good adhesiveness even after long-term storage because the silane coupling agent is not easily altered. I will provide a.
Moreover, the intermediate film for laminated glasses which consists of an adhesive film, and a laminated glass are provided.

本発明の接着フィルムは、封止用樹脂と、シランカップリング剤と、ｐＫｂが５〜１２の塩基性化合物と、を含む。
本発明の接着フィルムにおいては、前記塩基性化合物が、ｐＫｂが５〜１２の光安定剤であることが好ましい。The adhesive film of the present invention includes a sealing resin, a silane coupling agent, and a basic compound of pK b is 5 to 12, a.
In the adhesive film of the present invention, the basic compound, pK b is preferably a light stabilizer 5-12.

本発明の太陽電池用封止材は、前記接着フィルムからなる。
本発明の太陽電池モジュールは、太陽電池セルと、前記太陽電池セルを挟持した一対の、本発明の前記太陽電池用封止材とを備える。
本発明の合わせガラス用中間膜は、前記接着フィルムからなる。
本発明の合わせガラスは、一対のガラス板と、前記一対のガラス板により挟持された前記合わせ前記ガラス用中間膜とからなる。The sealing material for solar cells of this invention consists of the said adhesive film.
The solar cell module of this invention is equipped with a photovoltaic cell and a pair of said solar cell sealing material of this invention which clamped the said photovoltaic cell.
The interlayer film for laminated glass of the present invention comprises the adhesive film.
The laminated glass of the present invention comprises a pair of glass plates and the interlayer film for laminated glass sandwiched between the pair of glass plates.

本発明の接着フィルムは、シランカップリング剤が変質しにくく、長期保管後であっても良好な接着性を有する。
本発明の太陽電池モジュールは、接着フィルムの接着性が良好で剥離等の不具合が生じにくい。The adhesive film of the present invention hardly deteriorates the silane coupling agent and has good adhesiveness even after long-term storage.
In the solar cell module of the present invention, the adhesive film has good adhesiveness and is less likely to cause problems such as peeling.

本発明の太陽電池モジュールの一例を示す断面図である。It is sectional drawing which shows an example of the solar cell module of this invention.

＜接着フィルム＞
本発明の接着フィルムは、封止用樹脂と、シランカップリング剤と、ｐＫｂが５〜１２の塩基性化合物（以下、塩基性化合物（Ａ）という。）と、を含む。また、本発明の接着フィルムは、封止用樹脂、シランカップリング剤及び塩基性化合物（Ａ）以外の他の添加剤を含んでもよい。本発明の封止材は、接着フィルムからなる。<Adhesive film>
The adhesive film of the present invention includes a sealing resin, a silane coupling agent, pK b is from 5 to 12 of the basic compound (hereinafter, a basic compound (A) referred to.) And, the. Moreover, the adhesive film of this invention may also contain other additives other than sealing resin, a silane coupling agent, and a basic compound (A). The sealing material of this invention consists of an adhesive film.

［封止用樹脂］
封止用樹脂としては、封止材に通常使用される樹脂を使用することができる。
封止用樹脂としては、透明性、加工性及び架橋性に優れる点から、エチレン−極性基含有モノマー共重合体が好ましい。
前記極性基としては、例えば、エステル基（−Ｃ（Ｏ）Ｏ−Ｒ又はＲ−Ｃ（Ｏ）Ｏ−（ただし、Ｒはアルキル基）等）、カルボキシル基等が挙げられる。[Resin for sealing]
As the sealing resin, a resin usually used for a sealing material can be used.
As the sealing resin, an ethylene-polar group-containing monomer copolymer is preferable from the viewpoint of excellent transparency, processability, and crosslinkability.
Examples of the polar group include an ester group (—C (O) O—R or R—C (O) O— (wherein R is an alkyl group)), a carboxyl group, and the like.

極性基を有するモノマーの具体例としては、例えば、ビニルエステル（酢酸ビニル等）、（メタ）アクリル酸アルキルエステル（（メタ）アクリル酸メチル、（メタ）アクリル酸エチル、（メタ）アクリル酸プロピル、（メタ）アクリル酸ブチル等）、不飽和カルボン酸（（メタ）アクリル酸、等）、不飽和ジカルボン酸の無水物（無水マレイン酸等）、不飽和ジカルボン酸のエステル（マレイン酸モノメチル、マレイン酸ジメチル等）等が挙げられる。   Specific examples of the monomer having a polar group include, for example, vinyl ester (vinyl acetate and the like), alkyl (meth) acrylate (methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate), Butyl (meth) acrylate), unsaturated carboxylic acid ((meth) acrylic acid, etc.), anhydrides of unsaturated dicarboxylic acids (such as maleic anhydride), esters of unsaturated dicarboxylic acids (monomethyl maleate, maleic acid) Dimethyl etc.).

エチレン−極性基含有モノマー共重合体としては、柔軟性及び透明性の点から、エチレン−酢酸ビニル共重合体（以下、ＥＶＡともいう。）、エチレン−（メタ）アクリル酸アルキルエステル共重合体が好ましく、ＥＶＡが特に好ましい。   Examples of the ethylene-polar group-containing monomer copolymer include an ethylene-vinyl acetate copolymer (hereinafter also referred to as EVA) and an ethylene- (meth) acrylic acid alkyl ester copolymer from the viewpoint of flexibility and transparency. EVA is preferred, with EVA being particularly preferred.

エチレン−極性基含有モノマー共重合体における極性基を有するモノマー単位の割合は、耐熱性、接着性、柔軟性、成形性、耐久性、絶縁性の点から、全構成単位（１００質量％）のうち、１０〜４０質量％が好ましく、１５〜３５質量％がより好ましい。   The ratio of the monomer unit having a polar group in the ethylene-polar group-containing monomer copolymer is that of all structural units (100% by mass) from the viewpoint of heat resistance, adhesiveness, flexibility, moldability, durability, and insulation. Among these, 10-40 mass% is preferable and 15-35 mass% is more preferable.

エチレン−極性基含有モノマー共重合体の質量平均分子量は、１０，０００〜３００，０００が好ましく、１００，０００〜１７０，０００がより好ましい。エチレン−極性基含有モノマー共重合体の質量平均分子量が前記下限値以上であれば、機械的物性が良好な封止材が得られやすい。エチレン−極性基含有モノマー共重合体の質量平均分子量が前記上限値以下であれば、加工性に優れた封止材が得られやすい。
なお、質量平均分子量は、ゲルパーミエーションクロマトグラフィを用いて測定した値である。The mass average molecular weight of the ethylene-polar group-containing monomer copolymer is preferably 10,000 to 300,000, and more preferably 100,000 to 170,000. If the mass average molecular weight of the ethylene-polar group-containing monomer copolymer is not less than the lower limit, a sealing material having good mechanical properties can be easily obtained. If the mass average molecular weight of the ethylene-polar group-containing monomer copolymer is not more than the above upper limit value, it is easy to obtain a sealing material excellent in processability.
The mass average molecular weight is a value measured using gel permeation chromatography.

また、封止用樹脂としては、ポリエチレン、ポリプロピレン、アクリル樹脂等を用いてもよい。
封止用樹脂は、１種を単独で使用してもよく、２種以上を併用してもよい。Further, as the sealing resin, polyethylene, polypropylene, acrylic resin, or the like may be used.
The sealing resin may be used alone or in combination of two or more.

［シランカップリング剤］
シランカップリング剤は、太陽電池セル、透明保護材、バックシート等と封止材との接着性を改善する役割を果たす。シランカップリング剤としては、封止材に通常用いられるシランカップリング剤を使用することができる。
シランカップリング剤の具体例としては、例えば、３−メタクリロキシプロピルトリメトキシシラン、３−メタクリロキシプロピルトリメチルジメトキシシラン、アリルトリメトキシシラン、３−グリシドキシプロピルトリメトキシシラン、３−メルカプトプロピルトリメトキシシラン、ビニルトリメトキシシラン、３−グリシドキシプロピルメチルジメトキシシラン、等が挙げられる。[Silane coupling agent]
A silane coupling agent plays the role which improves the adhesiveness of a photovoltaic cell, a transparent protective material, a back sheet etc., and a sealing material. As a silane coupling agent, the silane coupling agent normally used for a sealing material can be used.
Specific examples of the silane coupling agent include, for example, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropyltrimethyldimethoxysilane, allyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-mercaptopropyltri Examples include methoxysilane, vinyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, and the like.

シランカップリング剤としては、接着性の点から、トリメトキシシラン基を有するシランカップリング剤が好ましく、３−メタクリロキシプロピルトリメトキシシラン、３−メタクリロキシプロピルトリエトキシシランがより好ましい。
シランカップリング剤は、１種を単独で使用してもよく、２種以上を併用してもよい。As the silane coupling agent, a silane coupling agent having a trimethoxysilane group is preferable from the viewpoint of adhesiveness, and 3-methacryloxypropyltrimethoxysilane and 3-methacryloxypropyltriethoxysilane are more preferable.
A silane coupling agent may be used individually by 1 type, and may use 2 or more types together.

［塩基性化合物（Ａ）］
塩基性化合物（Ａ）は、ｐＫｂが５〜１２の塩基性の化合物である。塩基性化合物（Ａ）を用いることで、保管時における封止材中のシランカップリング剤の加水分解反応及び縮合反応の速度を低下させることができる。その結果、封止材を保管している際にシランカップリング剤が経時変化することを抑制できるため、封止材の接着性の低下が抑制される。
なお、ｐＫｂは、日本工業規格ＪＩＳ Ｋ ２５０１中和価測定の電位差滴定法により測定できる。[Basic Compound (A)]
Basic compound (A), pK b is a basic compound having from 5 to 12. By using the basic compound (A), the rate of hydrolysis reaction and condensation reaction of the silane coupling agent in the sealing material during storage can be reduced. As a result, since the silane coupling agent can be prevented from changing with time when the sealing material is stored, a decrease in the adhesiveness of the sealing material is suppressed.
Incidentally, pK b can be determined by potentiometric titration of the Japanese Industrial Standard JIS K 2501 neutralization titration.

塩基性化合物（Ａ）としては、ｐＫｂが５〜１２の塩基性の化合物であればよく、耐光性が高く、酸化などにより変色しにくい点から、ｐＫｂが５〜１２の光安定剤（以下、光安定剤（ａ）ともいう。）が好ましい。The basic compound (A), may be a basic compound pK b is 5 to 12, high light resistance, from the viewpoint of not easily discolored due oxidation, pK b is from 5 to 12 light stabilizers ( Hereinafter, the light stabilizer (a) is also preferable.

光安定剤（ａ）としては、例えば、ビス（１，２，２，６，６−ペンタメチル−４−ピペリジル）セバケート（ｐＫｂ＝５〜６）、ブタン二酸１−［２−（４−ヒドロキシ−２，２，６，６−テトラメチルピペリジノ）エチル］（ｐＫｂ＝７〜８）、デカン二酸ビス［２，２，６，６−テトラメチル−１−（オクチルオキシ）ピペリジン−４−イル］（ｐＫｂ＝８〜１０）、ビス（１−ウンデカノキシ−２，２，６，６−テトラメチルピペリジノン−４−イル）カーボネート（ｐＫｂ＝１１〜１２）等が挙げられる。
塩基性化合物（Ａ）は、１種を単独で使用してもよく、２種以上を併用してもよい。Examples of the light stabilizer (a) include bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate (pK b = 5 to 6), butanedioic acid 1- [2- (4- Hydroxy-2,2,6,6-tetramethylpiperidino) ethyl] (pK b = 7-8), bis [2,2,6,6-tetramethyl-1- (octyloxy) piperidine decandioate -4-yl] (pK b = 8 to 10), bis (1-undecanoxy-2,2,6,6-tetramethylpiperidinon-4-yl) carbonate (pK b = 11 to 12), and the like. It is done.
A basic compound (A) may be used individually by 1 type, and may use 2 or more types together.

［他の添加剤］
他の添加剤としては、紫外線吸収剤、光安定剤（ａ）以外の光安定剤、酸化防止剤、架橋剤、架橋助剤、顔料、染料、可塑剤、充填材等が挙げられる。本発明の封止材は、架橋剤を含むことが好ましく、架橋剤及び架橋助剤を含むことがより好ましい。[Other additives]
Examples of other additives include ultraviolet absorbers, light stabilizers other than the light stabilizer (a), antioxidants, crosslinking agents, crosslinking aids, pigments, dyes, plasticizers, fillers, and the like. The sealing material of the present invention preferably contains a crosslinking agent, and more preferably contains a crosslinking agent and a crosslinking aid.

架橋剤は、封止用樹脂を架橋させる成分である。
架橋剤としては、公知の有機過酸化物（パーオキシケタール類、ジアルキルパーオキサイド類、パーオキシエステル類等）、光増感剤等が挙げられる。The crosslinking agent is a component that crosslinks the sealing resin.
Examples of the crosslinking agent include known organic peroxides (peroxyketals, dialkyl peroxides, peroxyesters, etc.), photosensitizers and the like.

架橋助剤は、重合性不飽和基（ビニル基、アリル基、（メタ）アクリロキシ基等）を１つ以上（好ましくは２つ以上）有する化合物である。
架橋助剤としては、例えば、トリアリルイソシアヌレート、トリアリルシアヌレート、トリメチロールプロパントリメタクリレート等が挙げられる。The crosslinking aid is a compound having one or more (preferably two or more) polymerizable unsaturated groups (vinyl group, allyl group, (meth) acryloxy group, etc.).
Examples of the crosslinking aid include triallyl isocyanurate, triallyl cyanurate, and trimethylolpropane trimethacrylate.

紫外線吸収剤としては、例えば、ベンゾフェノン系紫外線吸収剤、ベンゾトリアゾール系紫外線吸収剤、サリチル酸エステル系紫外線吸収剤等が挙げられる。   Examples of the ultraviolet absorber include benzophenone-based ultraviolet absorbers, benzotriazole-based ultraviolet absorbers, and salicylic acid ester-based ultraviolet absorbers.

光安定剤（ａ）以外の光安定剤としては、例えば、セバシン酸ビス（２，２，６，６−テトラメチルピペリジン−４−イル）（４≦ｐＫｂ＜５）、３−（２，２，６，６−テトラメチル−４−ピペリジニル）−２−メチル−１−プロペン−３−オン（４≦ｐＫｂ＜５）等が挙げられる。Examples of the light stabilizer other than the light stabilizer (a) include bis (2,2,6,6-tetramethylpiperidin-4-yl) sebacate (4 ≦ pK b <5), 3- (2, 2,6,6-tetramethyl-4-piperidinyl) -2-methyl-1-propen-3-one (4 ≦ pK b <5) and the like.

［各成分の割合］
本発明の封止材におけるシランカップリング剤の含有量は、封止用樹脂の１００質量部に対して、０．１〜２質量部が好ましく、０．２〜１．０質量部がより好ましい。シランカップリング剤の含有量が前記下限値以上であれば、優れた接着性が得られやすい。シランカップリング剤の含有量が前記上限値以下であれば、コスト的に有利である。[Ratio of each component]
As for content of the silane coupling agent in the sealing material of this invention, 0.1-2 mass parts is preferable with respect to 100 mass parts of resin for sealing, and 0.2-1.0 mass part is more preferable. . If content of a silane coupling agent is more than the said lower limit, the outstanding adhesiveness will be easy to be obtained. If content of a silane coupling agent is below the said upper limit, it is advantageous in terms of cost.

本発明の封止材が架橋剤を含む場合、架橋剤の含有量は、封止用樹脂１００質量部に対して、０質量部超５質量部以下が好ましく、０質量部超２質量部以下がより好ましい。
本発明の封止材が架橋助剤を含む場合、架橋助剤の使用量は、封止用樹脂１００質量部に対して、０質量部超５質量部以下が好ましく、０質量部超２質量部以下がより好ましい。When the sealing material of the present invention contains a crosslinking agent, the content of the crosslinking agent is preferably more than 0 parts by mass and less than 5 parts by mass, more than 0 parts by mass and less than 2 parts by mass with respect to 100 parts by mass of the sealing resin. Is more preferable.
When the sealing material of the present invention contains a crosslinking aid, the amount of the crosslinking aid used is preferably more than 0 parts by mass and less than 5 parts by mass, more than 0 parts by mass and more than 2 parts by mass with respect to 100 parts by mass of the sealing resin. Part or less is more preferable.

封止材の厚さは、太陽電池モジュールに応じて適宜設定すればよく、０．０５〜１ｍｍが好ましい。封止材の厚さを前記下限値以上とすれば、太陽電池セルを封止することが容易になる。封止材の厚さを前記上限値以下とすれば、太陽電池モジュールを薄型化できる。   What is necessary is just to set the thickness of a sealing material suitably according to a solar cell module, and 0.05-1 mm is preferable. When the thickness of the sealing material is set to the lower limit value or more, it becomes easy to seal the solar battery cell. If the thickness of the sealing material is set to the upper limit value or less, the solar cell module can be thinned.

［封止材の製造方法］
本発明の封止材の製造方法は、特に限定されず、例えば、封止用樹脂、シランカップリング剤及び塩基性化合物（Ａ）と、必要に応じて使用する他の添加剤を混合して樹脂組成物を得た後に、前記樹脂組成物をシート化する方法等が挙げられる。
シート化方法としては、例えば、Ｔダイを用いた押出成形法、プレス成形法等が挙げられる。また、樹脂組成物を溶液とする場合、離型シートに樹脂組成物を塗工し、乾燥することにより、シート化することもできる。[Method of manufacturing sealing material]
The manufacturing method of the sealing material of this invention is not specifically limited, For example, resin for sealing, a silane coupling agent, a basic compound (A), and the other additive used as needed are mixed. Examples thereof include a method of forming the resin composition into a sheet after obtaining the resin composition.
Examples of the sheet forming method include an extrusion molding method using a T die, a press molding method, and the like. Moreover, when making a resin composition into a solution, it can also be formed into a sheet by applying the resin composition to a release sheet and drying.

［作用効果］
以上説明した本発明の封止材においては、特定のｐＫｂの塩基性の低い塩基性化合物（Ａ）が含まれているため、封止材の保管中にシランカップリング剤が加水分解や縮合によって経時変化することが抑制される。また、シランカップリング剤の縮合反応部位の構造や配位数を調節して縮合反応の速度を低下させる必要がないため、シランカップリング剤の接着性が充分に得られる。
以上のことから、本発明の封止材は、長期保管後であっても良好な接着性を有しており、剥離等の不具合が生じにくい太陽電池モジュールを製造することができる。[Function and effect]
Or in the sealing material of the present invention described, certain basic low basic compound pK b (A) because it contains a silane coupling agent during storage of the sealing material is hydrolyzed and condensed Is prevented from changing over time. Further, since it is not necessary to adjust the structure and coordination number of the condensation reaction site of the silane coupling agent to reduce the speed of the condensation reaction, sufficient adhesion of the silane coupling agent can be obtained.
From the above, the sealing material of the present invention has good adhesiveness even after long-term storage, and can produce a solar cell module that is less prone to problems such as peeling.

＜太陽電池モジュール＞
以下、本発明の太陽電池モジュールの一例について図１に基づいて説明する。
本実施形態の太陽電池モジュール１０は、図１に示すように、複数の太陽電池セル１１，１１・・・と、一対の太陽電池用封止材１２，１２（以下、封止材１２という。）と、透明保護材１３と、バックシート１４とを備える。
太陽電池セル１１は、一対の封止材１２，１２に挟持されて固定されている。また、封止材１２，１２は、透明保護材１３とバックシート１４との間に配置されている。
封止材１２は、本発明の封止材である。<Solar cell module>
Hereinafter, an example of the solar cell module of the present invention will be described with reference to FIG.
As shown in FIG. 1, the solar cell module 10 of this embodiment includes a plurality of solar cells 11, 11... And a pair of solar cell sealing materials 12, 12 (hereinafter referred to as a sealing material 12). ), A transparent protective material 13, and a back sheet 14.
The solar battery cell 11 is sandwiched and fixed between a pair of sealing materials 12 and 12. Further, the sealing materials 12 and 12 are disposed between the transparent protective material 13 and the back sheet 14.
The sealing material 12 is the sealing material of the present invention.

［太陽電池セル］
太陽電池セル１１としては、例えば、ｐ型とｎ型の半導体を接合した構造を有するｐｎ接合型太陽電池素子が挙げられる。
ｐｎ接合型太陽電池素子としては、例えば、シリコン系（単結晶シリコン系、多結晶シリコン系、アモルファスシリコン系等）、化合物系（ＧａＡｓ系、ＣＩＳ系、ＣｄＴｅ−ＣｄＳ系）等が挙げられる。
本実施形態例では、複数の太陽電池セル１１は、導線及び半田接合部を備えたタブストリング１５を介して電気的に直列に接続されている。[Solar cells]
Examples of the solar battery cell 11 include a pn junction solar battery element having a structure in which a p-type semiconductor and an n-type semiconductor are joined.
Examples of the pn junction solar cell element include silicon (single crystal silicon, polycrystalline silicon, amorphous silicon, etc.), compound (GaAs, CIS, CdTe-CdS) and the like.
In the present embodiment example, the plurality of solar cells 11 are electrically connected in series via a tab string 15 having a conductive wire and a solder joint.

［透明保護材］
透明保護材１３としては、太陽電池モジュールの表面側を保護するために通常使用さていれる部材が使用でき、例えば、ガラス板、樹脂板等が挙げられる。
ガラス板としては、光透過性の点から、表面に凹凸を形成した型板ガラスが好ましい。型板ガラスの材料としては、鉄分の少ない白板ガラス（高透過ガラス）が好ましい。[Transparent protective material]
As the transparent protective material 13, a member usually used for protecting the surface side of the solar cell module can be used, and examples thereof include a glass plate and a resin plate.
As a glass plate, the template glass which formed the unevenness | corrugation in the surface from the point of light transmittance is preferable. As the material of the template glass, white plate glass (high transmission glass) with less iron content is preferable.

［バックシート］
バックシート１４としては、太陽電池モジュールのバックシートとして通常使用されているものが使用できる。
バックシート１４の材料としては、例えば、ポリフッ化ビニル、ポリエステル（ポリエチレンテレフタレート等）、ポリオレフィン（ポリエチレン等）、ガラス、金属（アルミニウム等）等が挙げられる。
バックシート１４は、単層であってもよく、複層であってもよい。[Back sheet]
As the back sheet 14, what is normally used as a back sheet of a solar cell module can be used.
Examples of the material of the back sheet 14 include polyvinyl fluoride, polyester (polyethylene terephthalate, etc.), polyolefin (polyethylene, etc.), glass, metal (aluminum, etc.), and the like.
The backsheet 14 may be a single layer or a multilayer.

［太陽電池モジュールの製造方法］
本発明の太陽電池モジュールの製造方法は、本発明の封止材を用いる以外は公知の製造方法を採用できる。
例えば、太陽電池モジュール１０の製造方法としては、以下の方法が挙げられる。
タブストリング１５を用いて電気的に接続した複数の太陽電池セル１１，１１・・・を一対の封止材１２，１２で挟み、さらに封止材１２，１２を透明保護材１３とバックシート１４とで挟む。その後、加熱して、封止材１２，１２同士、封止材１２と透明保護材１３、封止材１２とバックシート１４とを接着する。[Method for manufacturing solar cell module]
The manufacturing method of the solar cell module of this invention can employ | adopt a well-known manufacturing method except using the sealing material of this invention.
For example, the following method is mentioned as a manufacturing method of the solar cell module 10.
A plurality of solar cells 11, 11... Electrically connected using a tab string 15 are sandwiched between a pair of sealing materials 12, 12, and the sealing materials 12, 12 are further sandwiched between a transparent protective material 13 and a back sheet 14. And pinch. Then, it heats and the sealing materials 12 and 12, the sealing material 12, the transparent protective material 13, and the sealing material 12 and the back sheet | seat 14 are adhere | attached.

封止材１２が架橋剤を含有する場合には、架橋剤の分解温度以上に加熱することが好ましい。架橋剤の分解温度以上に加熱すれば、封止材１２に含まれる封止用樹脂を架橋でき、封止材１２の耐久性をより向上させることができる。   When the sealing material 12 contains a crosslinking agent, it is preferable to heat it above the decomposition temperature of the crosslinking agent. When heated to a temperature equal to or higher than the decomposition temperature of the crosslinking agent, the sealing resin contained in the sealing material 12 can be crosslinked, and the durability of the sealing material 12 can be further improved.

［作用効果］
以上説明した本発明の太陽電池モジュールは、良好な接着性を有する本発明の封止材を用いるため、剥離等の不具合が生じにくい。
なお、本発明の太陽電池モジュールは、前記した太陽電池モジュール１０には限定されない。
例えば、前記接着フィルムからなる合わせガラス用中間膜を用いてもよい。
また、一対のガラス板と、前記一対のガラス板により挟持された前記ガラス用中間膜とからなる合わせガラスを用いてもよい。[Function and effect]
Since the solar cell module of the present invention described above uses the sealing material of the present invention having good adhesiveness, problems such as peeling are unlikely to occur.
The solar cell module of the present invention is not limited to the solar cell module 10 described above.
For example, an interlayer film for laminated glass made of the adhesive film may be used.
Moreover, you may use the laminated glass which consists of a pair of glass plate and the said intermediate film for glass clamped by the said pair of glass plate.

以下、実施例によって本発明を詳細に説明するが、本発明は以下の記載によっては限定されない。
［化合物］
使用した化合物の略号を以下に示す。
（封止用樹脂）
ＥＶＡ−１：エチレン−酢酸ビニル共重合体（製品名「ＳＥＥＴＥＣ ＶＥ７００」、酢酸ビニル単位の割合：２８質量％、湖南石油化学社製）。EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited by the following description.
[Compound]
Abbreviations of the compounds used are shown below.
(Resin for sealing)
EVA-1: ethylene-vinyl acetate copolymer (product name “SEETEC VE700”, ratio of vinyl acetate unit: 28% by mass, manufactured by Hunan Petrochemical Co., Ltd.).

（光安定剤）
ａ−１：ビス（１，２，２，６，６−ペンタメチル−４−ピペリジル）セバケート（ｐＫｂ＝５〜６、製品名「ＪＦ−９５」、城北化学工業社製）、
ａ−２：ブタン二酸１−［２−（４−ヒドロキシ−２，２，６，６−テトラメチルピペリジノ）エチル］（ｐＫｂ＝７〜８、製品名「Ｔｉｎｕｖｉｎ６２２」、ＢＡＳＦジャパン社製）、
ａ−３：デカン二酸ビス［２，２，６，６−テトラメチル−１−（オクチルオキシ）ピペリジン−４−イル］（ｐＫｂ＝８〜１０、製品名「Ｔｉｎｕｖｉｎ１２３」、ＢＡＳＦジャパン社製）、
ａ−４：ビス（１−ウンデカノキシ−２，２，６，６−テトラメチルピペリジノン−４−イル）カーボネート（ｐＫｂ＝１１〜１２、製品名「ＬＡ−８１」、ＡＤＥＫＡ社製）、
ｅ−１：セバシン酸ビス（２，２，６，６−テトラメチルピペリジン−４−イル）（４≦ｐＫｂ＜５、製品名「ＪＦ−９０」、城北化学工業社製）、
ｅ−２：３−（２，２，６，６−テトラメチル−４−ピペリジニル）−２−メチル−１−プロペン−３−オン（４≦ｐＫｂ＜５、製品名「ＬＡ−８７」、ＡＤＥＫＡ社製）。(Light stabilizer)
a-1: bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate (pK b = 5 to 6, product name “JF-95”, manufactured by Johoku Chemical Co., Ltd.),
a-2: butanedioic acid 1- [2- (4-hydroxy-2,2,6,6-tetramethylpiperidino) ethyl] (pK b = 7-8, product name “Tinuvin 622”, BASF Japan Ltd. Made),
a-3: bis (2,2,6,6-tetramethyl-1- (octyloxy) piperidin-4-yl) decanedioate (pK b = 8-10, product name “Tinuvin 123”, manufactured by BASF Japan Ltd.) ),
a-4: bis (1-undecanoxy-2,2,6,6-tetramethylpiperidinon-4-yl) carbonate (pK b = 11 to 12, product name “LA-81”, manufactured by ADEKA),
e-1: bis (2,2,6,6-tetramethylpiperidin-4-yl) sebacate (4 ≦ pK b <5, product name “JF-90”, manufactured by Johoku Chemical Industry Co., Ltd.),
e-2: 3- (2,2,6,6-tetramethyl-4-piperidinyl) -2-methyl-1-propen-3-one (4 ≦ pK b <5, product name “LA-87”, ADEKA).

（シランカップリング剤）
ｂ−１：３−メタクリロキシプロピルトリメトキシシラン（製品名「ＫＢＭ−５０３」、信越シリコーン社製）。(Silane coupling agent)
b-1: 3-Methacryloxypropyltrimethoxysilane (product name “KBM-503”, manufactured by Shin-Etsu Silicone).

（架橋剤）
ｃ−１：ｔ−ブチルパーオキシ−２−エチルヘキシルモノカーボネート（製品名「カヤヘキサＡＤ」、化薬アクゾ社製）。(Crosslinking agent)
c-1: t-Butylperoxy-2-ethylhexyl monocarbonate (product name “Kayahexa AD”, manufactured by Kayaku Akzo).

（架橋助剤）
ｄ−１：トリアリルイソシアヌレート（製品名「ＴＡＩＣ（登録商標）」、日本化成社製）。(Crosslinking aid)
d-1: triallyl isocyanurate (product name “TAIC (registered trademark)”, manufactured by Nippon Kasei Co., Ltd.).

［実施例１］
ＥＶＡ−１を１００質量部と、塩基性化合物である光安定剤（ａ−１）０．２質量部と、シランカップリング剤（ｂ−１）０．２質量部と、架橋剤（ｃ−１）０．５質量部と、架橋助剤（ｄ−１）０．５質量部とを混合し、樹脂組成物を得た。得られた樹脂組成物を一軸押出機による押出成形によりシート化して封止材を得た。[Example 1]
100 parts by weight of EVA-1, 0.2 parts by weight of a light stabilizer (a-1) as a basic compound, 0.2 parts by weight of a silane coupling agent (b-1), and a crosslinking agent (c- 1) 0.5 parts by mass and 0.5 parts by mass of a crosslinking aid (d-1) were mixed to obtain a resin composition. The obtained resin composition was made into a sheet by extrusion molding using a single screw extruder to obtain a sealing material.

［実施例２〜８］
各成分の組成を表１に示すとおりに変更した以外は、実施例１と同様にして封止材を得た。[Examples 2 to 8]
A sealing material was obtained in the same manner as in Example 1 except that the composition of each component was changed as shown in Table 1.

［比較例１〜５］
各成分の組成を表２に示すとおりに変更した以外は、実施例１と同様にして封止材を得た。[Comparative Examples 1-5]
A sealing material was obtained in the same manner as in Example 1 except that the composition of each component was changed as shown in Table 2.

［剥離強度］
得られた封止材を厚さ１５０μｍのオレフィンフィルムで包装したサンプルを複数用意し、２３℃×８５％ＲＨと、３０℃×６０％ＲＨの２種類の条件でそれぞれ保管した。各条件における６ヶ月保管後と、１２ヶ月保管後のサンプルについて、以下の方法で剥離強度を測定した。
保管後のサンプルからオレフィンフィルムを剥がし、２０ｃｍ四方のシボ白板ガラス上に重ねて、ラミネーターにより１５０℃で５分間真空脱気した後、圧力０．１ＭＰａで１２分間圧着して試験片を得た。前記試験片について、１８０°引張試験装置（島津製作所社製「ＡＧ−５０００Ａ」）を用いて、２３℃×５０％ＲＨの条件下で１８０°剥離試験を行い、剥離強度（Ｎ／ｃｍ）を測定した。
剥離強度の測定結果を表１及び表２に示す。[Peel strength]
A plurality of samples in which the obtained sealing material was packaged with an olefin film having a thickness of 150 μm were prepared and stored under two conditions of 23 ° C. × 85% RH and 30 ° C. × 60% RH, respectively. The peel strength was measured by the following method for samples after 6 months storage and 12 months storage under each condition.
The olefin film was peeled off from the sample after storage, placed on a 20 cm square white glass plate, vacuum degassed with a laminator at 150 ° C. for 5 minutes, and then pressure-bonded at a pressure of 0.1 MPa for 12 minutes to obtain a test piece. The test piece was subjected to a 180 ° peel test under the condition of 23 ° C. × 50% RH using a 180 ° tensile test apparatus (“AG-5000A” manufactured by Shimadzu Corporation), and the peel strength (N / cm) was determined. It was measured.
Tables 1 and 2 show the measurement results of the peel strength.

Figure 2015068691
Figure 2015068691

Figure 2015068691
Figure 2015068691

表１に示すように、ｐＫｂが５〜１２の塩基性化合物である光安定剤を含む実施例１〜８の封止材では、２３℃×８５％ＲＨ、３０℃×６０％ＲＨのいずれの条件で保管した場合でも、１２ヶ月経過後の剥離強度が３６Ｎ／ｃｍ以上であり、接着性の低下が抑制されていた。
一方、表２に示すように、ｐＫｂが５未満の光安定剤を含むものの、ｐＫｂが５〜１２の塩基性化合物を含まない比較例１〜５の封止材では、２３℃×８５％ＲＨ、３０℃×６０％ＲＨのいずれの条件で保管した場合でも、１２ヶ月経過後の剥離強度が１９Ｎ／ｃｍ未満となっており、封止材の接着性が著しく低下した。As shown in Table 1, in the sealing materials of Examples 1 to 8 including the light stabilizer whose pK b is a basic compound of 5 to 12, any of 23 ° C. × 85% RH and 30 ° C. × 60% RH Even when stored under the above conditions, the peel strength after 12 months was 36 N / cm or more, and a decrease in adhesiveness was suppressed.
On the other hand, as shown in Table 2, in the sealing materials of Comparative Examples 1 to 5 containing a light stabilizer having a pK b of less than 5, but containing no basic compound having a pK b of 5 to 12, 23 ° C. × 85 Even when stored under the conditions of% RH and 30 ° C. × 60% RH, the peel strength after 12 months was less than 19 N / cm, and the adhesiveness of the sealing material was significantly reduced.

本発明によれば、シランカップリング剤が変質しにくく、長期保管後であっても良好な接着性を有する接着フィルム、太陽電池用封止材、及び前記太陽電池用封止材を用いた太陽電池モジュールを提供することができる。また、接着フィルムからなる合わせガラス用中間膜、及び合わせガラスを提供する。 According to the present invention, the silane coupling agent is unlikely to be altered and has good adhesiveness even after long-term storage, the solar cell encapsulant, and the solar cell using the solar cell encapsulant A battery module can be provided. Moreover, the intermediate film for laminated glasses which consists of an adhesive film, and a laminated glass are provided.

１０ 太陽電池モジュール
１１ 太陽電池セル
１２ 太陽電池用封止材
１３ 透明保護材
１４ バックシート
１５ タブストリングDESCRIPTION OF SYMBOLS 10 Solar cell module 11 Solar cell 12 Solar cell sealing material 13 Transparent protective material 14 Back sheet 15 Tab string

Claims (6)

封止用樹脂と、シランカップリング剤と、ｐＫｂが５〜１２の塩基性化合物と、を含む接着フィルム。Adhesive film comprising a sealing resin, a silane coupling agent, and a basic compound of pK b is 5 to 12, a. 前記塩基性化合物が、ｐＫｂが５〜１２の光安定剤である、請求項１に記載の接着フィルム。Wherein the basic compound is, pK b is a light stabilizer of 5-12, the adhesive film according to claim 1. 請求項１又は２に記載の前記接着フィルムからなる太陽電池用封止材。 The sealing material for solar cells which consists of the said adhesive film of Claim 1 or 2. 太陽電池セルと、前記太陽電池セルを挟持した一対の、請求項３に記載の前記太陽電池用封止材とを備える、太陽電池モジュール。   A solar cell module provided with a photovoltaic cell and a pair of said solar cell sealing material of Claim 3 which clamped the said photovoltaic cell. 請求項１又は２に記載の前記接着フィルムからなる合わせガラス用中間膜。 An interlayer film for laminated glass comprising the adhesive film according to claim 1. 一対のガラス板と、前記一対のガラス板により挟持された請求項５に記載の前記合わせガラス用中間膜とからなる合わせガラス。 The laminated glass which consists of a pair of glass plate and the said intermediate film for laminated glasses of Claim 5 clamped by the said pair of glass plate.
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