WO2014063646A1 - 一种太阳能电池汇流板用聚酯/聚烯烃复合热熔胶的制备方法 - Google Patents

一种太阳能电池汇流板用聚酯/聚烯烃复合热熔胶的制备方法 Download PDF

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WO2014063646A1
WO2014063646A1 PCT/CN2013/085891 CN2013085891W WO2014063646A1 WO 2014063646 A1 WO2014063646 A1 WO 2014063646A1 CN 2013085891 W CN2013085891 W CN 2013085891W WO 2014063646 A1 WO2014063646 A1 WO 2014063646A1
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pnt
hot melt
reaction
solar cell
weight
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English (en)
French (fr)
Inventor
薛为岚
赵萍
李哲龙
朱万育
曾作祥
高旭
刘娟
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KUNSHAN TIANYANG HOT MELT ADHESIVE CO Ltd
SHANGHAI TIANYANG HOT MELT ADHESIVE CO Ltd
East China University of Science and Technology
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KUNSHAN TIANYANG HOT MELT ADHESIVE CO Ltd
SHANGHAI TIANYANG HOT MELT ADHESIVE CO Ltd
East China University of Science and Technology
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Priority to AU2013337195A priority Critical patent/AU2013337195B2/en
Priority to US14/358,667 priority patent/US9206339B2/en
Priority to SG11201402519YA priority patent/SG11201402519YA/en
Priority to KR1020147017422A priority patent/KR101614125B1/ko
Publication of WO2014063646A1 publication Critical patent/WO2014063646A1/zh
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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
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/04—Homopolymers or copolymers of ethene
    • C09J123/06—Polyethylene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethylene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy 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
    • C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Adhesives based on derivatives of such polymers
    • C09J167/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
    • H10F19/80—Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F77/00—Constructional details of devices covered by this subclass
    • H10F77/93—Interconnections
    • H10F77/933—Interconnections for devices having potential barriers
    • H10F77/935—Interconnections for devices having potential barriers for photovoltaic devices or modules
    • H10F77/937—Busbar structures for modules
    • 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

Definitions

  • the invention relates to a preparation method of a polyester/polyolefin composite hot melt adhesive, in particular to a preparation method of a hot melt adhesive for a solar cell busbar with excellent weather resistance.
  • the bus bar also known as the laminated bus bar, is a multi-layer laminated power module electrical connection component with reproducible electrical performance, low inductance, anti-interference, high reliability and space saving.
  • bus bar products have been widely used as power conversion device components.
  • the demand for hot melt adhesives for busbars has become more urgent.
  • the requirement is that the light transmittance is 93% ⁇ 94%, the melting point is below 140 °C, the mechanical properties and heat resistance are better, and the heat-resistant oxygen aging yellowing index ( ⁇ ) is controlled at about 0.3.
  • Low-density polyethylene is one of the most commonly used polymer materials. It is odorless, non-toxic, waxy, and has excellent low temperature resistance. Its minimum temperature can reach -70 ⁇ -100°C. It has good chemical stability, can withstand most acid and alkali corrosion, and has excellent electrical insulation properties. It is widely used as a film product and injection molded product.
  • LDPE Low-density polyethylene
  • Polyethylene naphthalate, or PNT for short, is a polyester resin with excellent mechanical properties and weather resistance, but its high melting point imposes restrictions on the application of some special industries.
  • Patent CN101628999A discloses the use of PE waste plastic raw materials and formulated modifiers to synthesize products with quality up to or close to PE new material quality through blending processing;
  • Patent CN101121792A discloses an ozone oxidation to improve EVA/PE blending foaming
  • the properties of the modified PE are greatly improved, the performance requirements of the hot-melt adhesive for the busbar have not been achieved, and the patent has a lower molecular weight synthesized.
  • PNT was blended with LDPE to prepare a polyester/polyolefin composite hot melt adhesive suitable for solar cell busbars.
  • the invention provides a preparation method of a hot melt adhesive for a busbar, which comprises the following steps:
  • the polycondensation reaction is carried out under vacuum to obtain a PNT having a weight average molecular weight of 16,000 to 20,000, a reaction temperature of 245 ° C to 265 ° C, a pressure of 500 Pa to 650 Pa, and a reaction time of 1.3 1! ⁇ 1.8 h;
  • the molar ratio of 2,6-naphthalene dicarboxylic acid to ethylene glycol is 1:1.8;
  • the weight percentages of the PNT, LDPE and the compatibilizer are 4.7% to 14%, 78% to 89%, and 5.7% to 8.2%, respectively, based on the total weight of the hot melt adhesive;
  • the LDPE is selected from low density polyethylene having a melt index of 2.0 to 3.0 g/10 min at 190 ° C / 2.16 kg;
  • the compatibilizer is a maleic acid grafted low density polyethylene having a graft ratio of 1.0 to 2.0% and a melt index of 2.0 to 3.0 g/10 min at 190 ° C / 2.16 kg.
  • the titanium catalyst is tetrabutyl titanate or tetraethyl titanate in an amount of 0.045% to 0.055% by weight based on the total weight of the dibasic acid and the diol.
  • the innovation of the present invention is that the synthesized lower weight average molecular weight PNT (16000-20000) is The modified component, and the maleic acid liver grafted low density polyethylene is used as a compatibilizer, and the LDPE and the above synthesized PNT and the compatibilizer are melt-blended to obtain excellent mechanical properties, heat resistance and weather resistance.
  • Performance polyester/polyolefin composite hot melt adhesive suitable for use as a solar cell manifold.
  • Example 1 The invention is further illustrated by the following examples, but the invention is not limited to the examples.
  • Example 1 The invention is further illustrated by the following examples, but the invention is not limited to the examples.
  • the above-prepared PNT was added to a LDPE having a melt index of 2.0 g/10 min at 190 ° C / 2.16 kg in a molten state, and a graft ratio of 1.0% and a melt index of 2.0 at 190 ° C / 2.16 kg.
  • g/10min of maleic acid liver grafted low density polyethylene is melt blended as a compatibilizer, wherein the weight percentages of PNT, LDPE and compatibilizer are 4.7%, 89%, 6.3%, respectively, after being uniformly mixed,
  • the material is discharged, that is, the solar cell bus bar is made of hot melt adhesive, and hot pressed to form a film to obtain a sample P1.
  • the reaction temperature is controlled at 202 ⁇ 243 °C, when the water formed by the reaction is 92% of the theoretical amount, the esterification reaction ends; then the vacuum is decompressed to carry out the polycondensation reaction, the reaction pressure For 550 Pa, the reaction temperature was controlled at 242 to 265 ° C, and after 1.5 h of reaction, PNT was obtained, and the weight average molecular weight was 16,000 as measured by GPC.
  • the above-prepared PNT was melted in a molten state at 190 ° C / 2.16 kg.
  • the pressure was 660 Pa
  • the reaction temperature was controlled at 245 to 262 ° C
  • polyester PNT was obtained
  • the weight average molecular weight was 17,000 as measured by GPC.
  • the above-prepared PNT was added to a LDPE having a melt index of 2.6 g/10 min at 190 ° C / 2.16 kg in a molten state, and a graft ratio of 1.0% and a melt index of 3.0 at 190 ° C / 2.16 kg.
  • g/10min of maleic anhydride grafted low density polyethylene is melt blended as a compatibilizer, wherein the weight percentages of PNT, LDPE and compatibilizer are 10.8%, 81%, 8.2%, respectively, after being mixed uniformly,
  • the material is obtained by using a hot melt adhesive for the solar cell busbar and hot pressing to form a film, and a sample P3 is obtained.
  • the weight average molecular weight was 20,000 by the GPC method.
  • the above-prepared PNT was added to a LDPE having a melt index of 3.0 g/10 min at 190 ° C / 2.16 kg in a molten state, and melted at a graft ratio of 1.5% at 190 ° C / 2.16 kg.
  • the maleic anhydride grafted low density polyethylene with a melt index of 2.0 g/10 min was melt blended as a compatibilizer, wherein the weight percentages of PNT, LDPE and compatibilizer were 14.0%, 7.8%, 8.0%, respectively, to be mixed. After evenly, the material is discharged, and the solar cell busbar is hot melted, and hot pressed to form a film to obtain a sample P4.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)

Abstract

本发明公开了一种太阳能电池汇流板用聚酯/聚烯烃复合热熔胶的制备方法，包括以下步骤：先将2,6-萘二甲酸与乙二醇，钛系催化剂以一定的配比先后经酯化、缩聚反应，合成得重均分子量为15000〜20000的聚酯PNT，然后在增容剂的作用下与低密度聚乙烯进行熔融共混，得到标的产品热熔胶。由该热熔胶制成的膜具有透光率高，力学性能、耐热性能和抗黄变性能优良，特别适用于太阳能电池汇流板。

Description

一种太阳能电池汇流板用聚酯 /聚烯烃复合热熔胶的制备方法
技术领域
本发明涉及一种聚酯 /聚烯烃复合热熔胶的制备方法， 特别是一种具有优 良耐候性的太阳能电池汇流板用热熔胶的制备方法。
背景技术
汇流条板亦称层压汇流条， 是一种多层层压结构的功率模块电连接部件， 具有可重复电气性能、 低感抗、 抗干扰、 可靠性好、 节省空间等特点。 随着 变流技术的发展和变流器模块化的趋势， 汇流条板产品作为功率转换装置部 件， 逐步被广泛应用。 近年来， 特别是随着太阳能电池的推广应用， 汇流板 用热熔胶的需求更加迫切。其要求是透光率在 93 %〜94 % ,熔点范围在层压温 度 140 °C以下， 力学性能和耐热性能较好， 耐热氧老化黄变指数（ΔΥΙ )控制 在 0.3左右。
低密度聚乙烯， 简称 LDPE, 是目前最常用的高分子材料之一， 无臭， 无 毒,手感似蜡,具有优良的耐低温性能， 其最低使用温度可达 -70〜 - 100°C,化学 稳定性好， 能耐大多数酸碱的侵蚀,电绝缘性能优良， 大量用作薄膜产品， 注 塑制品， 但是 LDPE对于环境应力是艮敏感的， 力学性能和耐热老化性差。 而聚萘二曱酸乙二醇酯， 简称 PNT, 是一种力学性能和耐候性能极为优越的 聚酯树脂， 但是其熔点较高， 给一些特殊行业的应用带来了限制。
专利 CN101628999A公开了以 PE废弃塑料原料和配制好的改性剂，通过 共混加工合成了质量达到或近似 PE全新料品质的产品； 专利 CN101121792A 公开了一种臭氧氧化提高 EVA/PE共混发泡材料性能的方法，得到 EVA/PE共 混复合物； 文献中对 PE的物理共混改性研究有 ^艮多， 如以 PP, PC, PBT等 改性 PE, 都可以提高 PE的环境应力性能及力学性能。 以上专利文献中所述共混改性 PE中， 虽然改性后 PE性能得到很大的改 善，但是还没有达到汇流板用热熔胶的性能要求， 本专利将所合成的具有较低 分子量的 PNT与 LDPE共混，制备了适用于太阳能电池汇流板的聚酯 /聚烯烃 复合热熔胶。
发明内容
本发明提供了一种汇流板用热熔胶的制备方法， 包括如下步骤：
( 1 )依次将 2,6-萘二曱酸、 乙二醇及钛系催化剂按照一定比例加入装有 温度计、 搅拌器和回流冷凝器的三口烧瓶中进行常压酯化反应， 反应温度 200 °C〜245 °C , 当反应生成的水为理论量的 92%〜96%时， 酯化反应结束；
( 2 )在真空下进行缩聚反应得到重均分子量为 16000〜20000的 PNT, 反 应温度为 245°C ~ 265°C , 压力为 500 Pa ~ 650 Pa, 反应时间为 1.3 1！〜 1.8 h;
( 3 )将步骤 ( 2 )所得 PNT、 增容剂和 LDPE进行熔融共混， 即得太阳 能电池汇流板用热熔胶；
所述 2,6-萘二曱酸和乙二醇的摩尔比为 1 :1.8;
以热熔胶总重量为基准，所述 PNT、 LDPE和增容剂的重量百分比分别为 4.7% ~ 14%、 78% ~ 89%和 5.7%〜8.2%；
所述 LDPE选用在 190 °C /2.16kg下熔融指数为 2.0〜3.0g/10min的低密度聚 乙烯；
所述增容剂为马来酸肝接枝低密度聚乙烯， 其接枝率为 1.0〜2.0%, 且在 在 190°C /2.16kg下熔融指数为 2.0〜3.0g/10min。
所述钛系催化剂为钛酸四丁酯或钛酸四乙酯， 其用量为二元酸和二元醇 总重量的 0.045% ~ 0.055 %。
本发明的创新点在于： 合成的较低重均分子量的 PNT ( 16000-20000 )为 改性组份， 并且选用马来酸肝接枝低密度聚乙烯为增容剂， 将 LDPE和上述 合成的 PNT及增容剂熔融共混， 得到了拥有优良的力学性能和耐热性能及耐 候性能的聚酯 /聚烯烃复合热熔胶， 适合用作太阳能电池汇流板。 具体实施方式
下面通过实施例对本发明进一步阐述， 但本发明并非局限于这些实施例。 实施例 1
将 179.4g 2,6-萘二曱酸与 120.6g乙二醇投入 1L反应釜中， 加入 0.135g 钛酸四丁酯催化剂，催化剂的用量为 2,6-萘二曱酸和乙二醇总重量的 0.045%, 进行常压酯化反应， 反应温度控制在 200 ~ 242 °C , 当反应生成的水为理论量 的 93%时，酯化反应结束；随后抽真空减压进行缩聚反应，反应压力为 500Pa, 反应温度控制在 243〜263 °C , 反应 1.8h后， 得 PNT, 用 GPC法测得重均分子 量为 18000。 将上述合成的 PNT在熔融状态下， 加入在 190 °C /2.16kg下熔融 指数为 2.0g/10min的 LDPE, 并以接枝率为 1.0%、 在 190°C/2.16kg下熔融指 数为 2.0g/10min的马来酸肝接枝低密度聚乙烯为增容剂进行熔融共混， 其中 PNT、 LDPE和增容剂的重量百分比分别为 4.7%、 89%、 6.3%,待混和均匀后， 出料， 即得太阳能电池汇流板用热熔胶， 并热压成膜， 得试样 Pl。
实施例 2
将 179.4g2,6-萘二曱酸与 120.6g乙二醇投入 1L反应釜中，加入 0.153g钛 酸四乙酯催化剂， 催化剂的用量为 2,6-萘二曱酸和乙二醇总重量的 0.051%, 进行常压酯化反应，反应温度控制在 202〜243 °C , 当反应生成的水为理论量的 92%时， 酯化反应结束； 随后抽真空减压进行缩聚反应， 反应压力为 550Pa, 反应温度控制在 242〜265°C , 反应 1.5h后， 得 PNT, 用 GPC法测得重均分子 量为 16000。 将上述合成的 PNT在熔融状态下， 加入在 190 °C /2.16kg下熔融 指数为 3.0g/10min的 LDPE, 并以接枝率为 2.0%、 在 190°C /2.16kg下熔融指 数为 2.0g/10min的马来酸肝接枝低密度聚乙烯为增容剂进行熔融共混， 其中 PNT、 低密度聚乙烯和增容剂的重量百分比分别为 7.3 %、 87 %、 5.7%, 待 混和均匀后， 出料， 即得太阳能电池汇流板用热熔胶， 并热压成膜， 得试样 P2。
实施例 3
将 179.4g 2,6-萘二曱酸与 120.6g乙二醇投入 1L反应釜中， 加入 0.147g 钛酸四乙酯催化剂，催化剂的用量为 2,6-萘二曱酸和乙二醇总重量的 0.049%, 进行常压酯化反应，反应温度控制在 203〜245°C , 当反应生成的水为理论量的 96%时， 酯化反应结束； 随后抽真空减压进行缩聚反应， 反应压力为 660Pa, 反应温度控制在 245〜262°C , 反应 1.7h后， 得聚酯 PNT, 用 GPC法测得重均 分子量为 17000。 将上述合成的 PNT在熔融状态下， 加入在 190°C/2.16kg下 熔融指数为 2.6g/10min的 LDPE, 并以接枝率为 1.0%、 在 190°C /2.16kg下熔 融指数为 3.0g/10min的马来酸酐接枝低密度聚乙烯为增容剂进行熔融共混， 其中 PNT、 LDPE和增容剂的重量百分比分别为 10.8%、 81%、 8.2%, 待混 和均匀后， 出料， 即得太阳能电池汇流板用热熔胶， 并热压成膜， 得试样 P3。
实施例 4
将 179.4g2,6-萘二曱酸与 120.6g乙二醇投入 1L反应釜中，加入 0.165g钛 酸四丁酯催化剂， 催化剂的用量为 2,6-萘二曱酸和乙二醇总重量的 0.055%, 进行常压酯化反应，反应温度控制在 201〜244°C , 当反应生成的水为理论量的 94%时， 酯化反应结束； 随后抽真空减压进行缩聚反应， 反应压力为 600Pa, 反应温度控制在 244〜264°C , 反应 1.3h后， 得聚酯 PNT, 用 GPC法测得重均 分子量为 20000。 将上述合成的 PNT在熔融状态下， 加入在 190°C/2.16kg下 熔融指数为 3.0g/10min的 LDPE, 并以接枝率为 1.5%、 在 190°C /2.16kg下熔 融指数为 2.0g/10min的马来酸酐接枝低密度聚乙烯为增容剂进行熔融共混， 其中 PNT、 LDPE和增容剂的重量百分比分别为 14.0 %、 7.8%、 8.0%, 待混 和均匀后， 出料， 即得太阳能电池汇流板用热熔胶， 并热压成膜， 得试样 P4。
对上述各个试样进行 DSC测试， 光透过率测试和耐热氧老化后的黄变指 数测试。 耐热氧老化后的黄变指数（ΔΥΙ )按 GB2409-80《塑料黄变指数实验 方法》进行测试， 见下表：
实施例 1-4所制备的试样各项测试结果
试样 DCS 测得的熔点 透光率（％) 耐热氧老化黄变指数
(°C) ( ΔΥΙ )
P1 109 95 0.30
P2 108 94 0.31
P3 110 94 0.29
P4 112 93 0.30

Claims

权利要求
1. 一种太阳能电池汇流板用聚酯 /聚烯烃复合热熔胶的制备方法， 其特征在于 包括如下步骤 ：
( 1 )依次将 2,6-萘二曱酸、 乙二醇及钛系催化剂按照一定比例加入装有 温度计、 搅拌器和回流冷凝器的三口烧瓶中进行常压酯化反应， 反应温度 200 °C 〜245°C , 当反应生成的水为理论量的 92%〜96% 时， 酯化反应结束 ；
( 2 )在真空下进行缩聚反应得到重均分子量为 16000〜20000 的 PNT, 反 应温度为 245°C ~ 265 °C ,压力为 500Pa ~ 650Pa,反应时间为 1.31！〜 1.8h ；
( 3 )将步骤（2 ) 所得 PNT、 增容剂和 LDPE进行熔融共混， 即得太阳 能电池汇流板用热熔胶 ；
所述 2,6-萘二曱酸和乙二醇的摩尔比为 1:1.8 ；
以热熔胶总重量为基准， 所述 PNT为聚萘二曱酸乙二醇酯；
所述 PNT、 LDPE 和增容剂的重量百分比分别为 4.7% ~ 14%、 78% ~ 89% 和 5.7%〜8.2% ；
所述 LDPE为在 190 °C /2.16kg下熔融指数为 2.0〜3.0g/10min的低密度聚乙 烯；
所述增容剂为马来酸酐接枝低密度聚乙烯， 其接枝率为 1.0〜2.0%, 在 190 °C /2.16kg下熔融指数为 2.0〜3.0g/10min。
2. 按照权利要求 1所述方法，其特征在于钛系催化剂为钛酸四丁酯或钛酸四 乙酯， 其用量为二元酸和二元醇总重量的 0.045% ~ 0.055%。
PCT/CN2013/085891 2012-11-27 2013-10-24 一种太阳能电池汇流板用聚酯/聚烯烃复合热熔胶的制备方法 Ceased WO2014063646A1 (zh)

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CN107129765A (zh) * 2017-05-15 2017-09-05 卡姆丹克太阳能（江苏）有限公司 一种MoSe2‑石墨烯共改性的PMMA光伏组件封装胶膜
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