JP2013509694A - Edge sealant composition containing a reactive or unsaturated polyolefin - Google Patents

Abstract

The solar module includes a photovoltaic device having an edge seal. Edge seal sealant composition contains unsaturated or reactive polyolefin, olefinic polymer, silane modified polyolefin, inert filler, moisture scavenger or desiccant, antioxidant, and UV stabilizer. To do. These ingredients are blended in a balanced manner to produce a sealant that combines desirable sealability, high weather resistance, desired rheology, low electrical conductivity, and good thermal stability.
[Selection] Figure 2

Description

[0001]
(Cross-reference with related patent applications)
This application is a priority claim application of US Provisional Patent Application No. 61 / 251,542 dated October 14, 2009, and German Application No. DE / 10 2007 045 104.2 dated September 20, 2007. Of the international application No. PCT / DE / 2008/001564 dated September 22, 2008, which is the claimed application, and the copending US patent application No. 12 / 679,250 dated March 19, 2010, which is the priority application. Partial continuation application. The entire contents of each of the above applications are incorporated herein by reference.

[0002]
(Technical field)
The present invention relates to edge sealant compositions containing reactive or unsaturated polyolefins, and more particularly to edge sealants containing reactive or unsaturated polyolefins that can be used in solar modules.

[0003]
Photovoltaic solar panels or modules are generally photovoltaic devices stacked and / or inserted between multiple layers. Most photovoltaic devices are rigid wafer-like crystalline silicon cells or thin layer modules with cadmium telluride (CdTe), amorphous silicon or copper indium diselenide (CuInSe ₂ ) deposited on a substrate. Thin layer solar modules may be rigid or flexible. Flexible thin layer cells and modules are made by depositing a photoactive layer and all other necessary materials on a flexible substrate. Photovoltaic devices are electrically connected to each other and with other solar panels or modules to form an integrated system.

[0004]
The efficiency of photovoltaic solar panels is reduced by the ingress of moisture. One effective way to suppress this moisture ingress from the environment into the moisture sensitive parts inside the solar module is the use of edge sealants. These edge sealants have the property of low moisture permeability (MVT).

[0005]
Edge sealants in solar modules are exposed to high temperatures, for example, during the lamination process during solar module manufacture. Therefore, it is desirable that these edge sealants have thermal stability. Most edge sealants are inherently polyolefinic. Therefore, the main degradation mechanism during high temperature exposure is random chain scission. When these free radicals are formed (as a result of random molecular chain breaks), the degradation is magnified. In addition, in applications where sealants are exposed to heat / photoinitiators (eg, encapsulants in solar modules such as EVA), these initiators tend to degrade the sealant. This can be a detrimental problem with respect to the internal and surface properties of the sealant (eg, reduced strength, reduced adhesion to glass). Therefore, there is a need in the art for an edge sealant that exhibits good thermal stability under high temperature conditions and also exhibits resistance to degradation (long-term stability in the field) after exposure to the polymerization initiator (encapsulant) in the solar module. It is said that.

[0006]
The solar module includes a photovoltaic device having an edge seal. Edge seal sealant composition contains unsaturated or reactive polyolefin, olefinic polymer, silane modified polyolefin, inert filler, moisture scavenger or desiccant, antioxidant, and UV stabilizer. To do. These ingredients are blended in a balanced manner to produce a sealant that combines desirable sealability, high weather resistance, desired rheology, low electrical conductivity, and good thermal stability.

[0007]
Other features, advantages and fields of application will be understood from the description disclosed herein. It will be appreciated that the description and specific examples in this application are for purposes of illustration only and are not intended to limit the scope of the invention.

[0008]
The drawings described herein are for illustrative purposes only and do not limit the scope of the invention. The components in the drawings are not necessarily to scale, emphasis instead being placed on illustrating the principles of the invention.

[0009] FIG. 2 is a plan view of one embodiment of a solar module having a border seal composition in accordance with the principles of the present invention. [0010] FIG. 2 is a cross-sectional view of a portion of one embodiment of a solar module having a border seal composition according to the present invention. [0011] FIG. 6 is a bar graph showing the weight loss rate of unsaturated or reactive polymer after 7 days incubation in a 180 ° C. air circulating oven. [0012] FIG. 3 is a bar graph showing the weight loss rate of non-reactive polyisobutene (PIB) after 7 days incubation in a 180 ° C. air circulating oven.

[0013]
The following description is merely exemplary in nature and is not intended to limit the invention, application, or uses.
[0014]
In FIGS. 1 and 2, an entire exemplary solar module utilizing a sealant composition in accordance with the principles of the present invention is indicated by reference numeral 10. The solar module 10 can take a variety of forms without departing from the scope of the present invention, and is generally at least one disposed within a chamber 13 defined by a first substrate 14 and a second substrate 16. Of photovoltaic cells 12. Although a plurality of photovoltaic cells 12 are illustrated, it will be appreciated that any number of photovoltaic cells 12 can be utilized.

[0015]
The photovoltaic cell 12 is operable to generate current from sunlight incident on the photovoltaic cell 12. Accordingly, the photovoltaic cell 12 can take a variety of forms without departing from the scope of the present invention. For example, the photovoltaic cell 12 can be a thin film cell including a layer of cadmium telluride (CdTe), amorphous silicon, or copper indium diselenide (CuInSe ₂ ). Alternatively, the photovoltaic cell 12 may be a crystalline silicon wafer embedded in a laminate film, or gallium arsenide deposited on germanium or another substrate. Other types of photovoltaic devices 12 that can be utilized include organic semiconductor cells using a combination of a conjugated polymer and a dye-sensitized metal oxide (including liquid metal oxides and solid metal oxides). The photovoltaic device 12 may be rigid or flexible. The photovoltaic cells 12 are connected in series or in parallel or a combination thereof. The current generated by the photovoltaic device 12 is sent to a wire or lead 15 that extends outside the solar module 10 through a bus bar or other conductive material or layer. Lead wire 15 leads to junction box 17 to distribute the current generated by solar module 10 to the power circuit.

[0016]
The first substrate 14 or front panel is formed from a material that is operable to transmit sunlight wavelengths. For example, the first substrate 14 is glass or a plastic film such as polyvinyl fluoride. The second substrate 16 or back panel is selected to provide additional strength to the solar module 10. For example, the second substrate 16 is made of a fluorinated ethylene / propylene copolymer (FEP), poly (ethylene / tetrafluoroethylene copolymer) (ETFE), polyvinylidene fluoride (PVDF), polyvinyl fluoride (PVF), poly Plastics such as (tetrafluoroethylene) (PTFE) and combinations of these with other polymeric materials.

[0017]
The photovoltaic cell 12 is sealed with a laminate layer 19 which is preferably crosslinkable ethylene vinyl acetate (EVA). However, it will be appreciated that other laminates or thermoplastic encapsulants may be utilized without departing from the scope of the present invention. The laminate layer 19 is used to partially seal the photovoltaic device 12 to protect it from contamination, mechanical stress and the environment.

[0018]
A border or edge seal 18 is disposed between the first substrate 14 and the second substrate 16 near the periphery of the solar module 10. The border seal 18 can have various widths. In addition, a second border seal (not shown) may be added. The second border seal can be composed of, for example, silicone, MS polymer, silane-modified polyurethane, butyl, or polysulfide. The border seal 18 functions to seal the laminate layer 19 and the photovoltaic device 12. The border seal 18 must have sufficient weather resistance, low water vapor transmission rate (MVT), and low conductivity to withstand external environment exposure including long-term ultraviolet exposure. The border seal 20 is composed of a sealant composition that has good thermal stability and oxidation stability in addition to the unique features of high weather resistance, low electrical conductivity, and MVT as described in detail below.

[0019]
The sealant composition of the border seal 18 contains an unsaturated or reactive polyolefin, an olefin polymer, a silane-modified polyolefin, an inert filler, a moisture scavenger, an antioxidant, and a UV stabilizer. These ingredients are blended in a balanced manner to produce a sealant that combines desirable sealability, high weather resistance, desired rheology, low electrical conductivity, and good thermal stability.

[0020]
In certain embodiments of the sealant, the unsaturated or reactive polyolefin is selected from the group consisting of EPDM, polyolefin acrylate and halobutyl. Olefin polymers include polyisobutylene, polybutene, butyl rubber (polyisobutylene / isoprene), styrene block copolymers, particularly SBS, SIS, SEBS, SEPS, SIBS, SPIBS, and modified products thereof, and amorphous copolymers of α-olefins. Selected from the group comprising polymers and / or terpolymers (APAO).

[0021]
The scope of the present invention includes polyisobutylene, polybutene, butyl rubber (polyisobutylene / isoprene), styrene block copolymers, in particular SBS, SIS, SEBS, SEPS, SIBS, SPIBS, and modified products thereof, and amorphous copolymers of α-olefins. Including selecting a modified polymer from the group comprising a polymer and / or a terpolymer (APAO), wherein the polymer is modified with at least one group of formula (1); Are end groups or are statistically distributed within the molecular chain.

［式中、−Ａ−は
−（ＣＨ_２）_ｍ−（２）、
−Ｓ−（ＣＨ_２）_ｍ−（３）又は

Wherein, -A- is _{- (CH 2) m - (} 2),
_{-S- (CH 2) m - (} 3) or

であり、
Ｒ^１及びＲ^２は同一又は異なり、炭素原子数１〜２０のアルキル基、炭素原子数６〜２０のアリール基、又は炭素原子数７〜２０のアラルキル基であり、
Ｘは水酸基又は加水分解性基であり、
ａは０、１、２又は３であり、ｂは０、１又は２であり、ａとｂの和は１以上であり、ｎは０〜１８の整数であり、ｍは０〜４の整数であり、Ｒ^３は

And
R ¹ and R ² are the same or different and are an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms,
X is a hydroxyl group or a hydrolyzable group,
a is 0, 1, 2 or 3, b is 0, 1 or 2, the sum of a and b is 1 or more, n is an integer of 0 to 18, and m is an integer of 0 to 4. And R ³ is

である。］
［００２２］
重質及び軽質チョーク、ケイ酸塩、石灰、酸化ケイ素並びにカーボンブラックを含む群から充填剤を選択することも本発明の範囲内である。

It is. ]
[0022]
It is also within the scope of the present invention to select a filler from the group comprising heavy and light chalk, silicates, lime, silicon oxide and carbon black.

[0023]
In this context, the invention also includes surface treatment of the chalk.
[0024]
On the other hand, it is also possible to use non-surface-treated chalk.

[0025]
The invention further encompasses selecting a silicate from the group comprising talc, kaolin, mica, silicon oxide, silica and calcium silicate or magnesium silicate.

[0026]
It is also within the scope of the present invention to select a desiccant or moisture scavenger from 3A-10A type molecular sieves (zeolites).

[0027]
Of course, other substances that are chemically or physically associated with water can also be used.

[0028]
It is possible to formulate a sealing compound as a one-part sealing compound or a two-part sealing compound. In the case of a one-pack type sealing compound, all components are mixed during the manufacturing process. In the case of a two-component sealing compound, a first liquid is formed from a predetermined component, and a second liquid is formed from the remaining components. Thereafter, the two-component compound is mixed immediately before coating.

[0029]
The present invention also includes selecting an anti-aging agent from the group comprising hindered phenols, thioethers, mercapto compounds, phosphites, benzotriazoles, benzophenones, HALS and antiozonants.

[0030]
In various aspects, the sealing compound can be used in the manufacture of double glazing for windows, greenhouses, structure and roof glass, land vehicles, marine and aircraft glass, and solar modules including thermoelectric solar modules. Sealing compounds containing unsaturated or reactive polyolefins in addition to silane modified polymers are designed to cure during the lamination process to provide additional structural strength.

[0031]
As proof of concept, the following unsaturated or reactive polyolefins were tested: Exxpro 3433 (Exxon), Lanxess bromobutyl 2030 (Lanxess), EPDM (Vistalon 5601) (Exxon), and Exxon chlorobutyl 1068. All samples were incubated in a 180 ° C. circulating air oven for 7 days, weighed, and the weight loss rate was calculated. The weight loss rate is proportional to the degree of thermal decomposition (inverse of thermal stability). Seven days of exposure to a 180 ° C. air circulating oven was selected as the limiting condition for studying the thermal stability of the polymer. Butyl tends to pyrolyze under these extreme conditions, resulting in significant weight loss. The main degradation mechanism under these conditions is explained to result in random chain scission resulting in the formation of sufficiently small molecules, possibly transported by air, resulting in weight loss. Also, when radicals are formed by random molecular chain breakage, the oxygen molecules will react with the radicals to form alkoxy radicals and peroxy radicals, so the thermal decomposition rate will be accelerated by oxygen. The reactivity of unsaturated rubbers uses these free radicals and tends to stop the progress of decomposition. In many cases, it has been observed that unsaturation and radical co-operation result in increased molecular weight and / or cross-linking, further increasing strength. It can be clearly seen from FIG. 3 that the selected reactive or unsaturated polyolefins showed minimal weight loss (less than 5%) after 7 days exposure to a 180 ° C. air circulating oven. Non-reactive polyolefins (BASF products Opanol B-100 and B-50) showed a weight loss rate of over 95% after exposure to similar conditions (see FIG. 4).

[0032]
It has been observed that reactive and / or unsaturated sites react with free radicals formed after high temperature exposure, decomposition is minimized (if any) and thermal stability is improved. It is thought that free radicals are generated as a result of heat or thermal / oxidative decomposition due to peroxide contained in the encapsulant in the solar module or reaction with these peroxides, but edge seals have low MVTR and are free radicals. And can be crosslinked during the reaction. Furthermore, the edge sealant exhibits a weight loss rate of less than 10% after aging for 7 days in an air circulation furnace at 180 ° C., which is an accelerated deterioration test as an index of thermal stability and thermal / oxidative stability. More preferably, the edge sealant exhibits a weight loss rate of less than 7.5% after aging for 7 days in a 180 ° C. circulating air oven.

[0033]
EPDM heavy comprising an unsaturated polymer backbone using a small but significant amount of at least one non-conjugated diene (eg, norbornadiene, dicyclopentadiene, and / or 1,5-hexadiene) with ethylene and propylene monomers. Coalescence is particularly useful. It is important to note that there is a unique duality in various EPDM polymers, i.e., the backbone is completely saturated, so it is highly stable, and most peroxides and other oxidants are It is non-reactive with the contained site, and there may be a double bond in the side chain and it may be cross-linked, but the main chain remains intact even if these side chain bonds are broken. is there.

[0034]
As shown in FIG. 1, the total composition containing the entire polymer produced a significantly lower weight loss result, and the composition containing EPDM (Vistalon) produced the lowest weight loss result. Theoretically, compositions containing EPDM are expected to better withstand harsh environments and be distinguished from other compositions even in harsh environments.

[0035]
EPDM does not contain halogens such as chlorine and bromine and has reactivity and a saturated main chain. In EPDM, gas generation of hydrochloric acid and hydrobromic acid cannot occur.

[0036]
For better understanding of the present invention, reference will now be made to the following examples, which are intended to illustrate the principles of the invention and are not intended to limit its scope.

  [Example 1]

［実施例２］

[Example 2]

［実施例３］

[Example 3]

各実施例の成分は以下の通りである：
不飽和反応性ポリオレフィン：例えば分子量Ｍｎ１００〜１００，０００Ｄａ、好ましくは１００〜５００，０００ＤａのＥＰＤＭ、ポリオレフィンアクリレート及びハロブチル；
オレフィン系重合体：ポリエチレン、ポリプロピレン、ポリブテン、ポリイソブテン、ブチルゴム（ポリイソブテン・イソプレン）、スチレンブロック共重合体（及びその変性物）が挙げられ、全オレフィン系重合体は分子量Ｍｎ１００〜１，０００，０００Ｄａ、好ましくは１００〜３００，０００Ｄａである；
シラン：ＤＦＤＡ−５４５１ＮＴ（Ｄｏｗ Ｃｈｅｍｉｃａｌ社製シラングラフトＰＥ）、ＤＦＤＡ−５４８１ＮＴ（Ｄｏｗ Ｃｈｅｍｉｃａｌ社製湿気硬化触媒）、非晶質ポリαオレフィン（限定されないが、例えばＶｅｓｔｏｐｌａｓｔ ２０６、Ｖｅｓｔｏｐｌａｓｔ ２４１２）、アルコキシシラン、アミノシラン；
不活性充填剤：重質及び軽質チョーク、ケイ酸塩、酸化ケイ素、カーボンブラック、ＣａＣＯ_３、Ｃａ（ＯＨ）_２、二酸化チタンが挙げられ、ケイ酸塩はタルク、カオリン、マイカ、酸化ケイ素、シリカ及びケイ酸カルシウム又はケイ酸マグネシウムを含む群から選択される；
水分捕捉剤（例えばＣａＯ）又は乾燥剤（例えばモレキュラーシーブ、シリカゲル及び硫酸カルシウム）；
老化防止剤：ヒンダードフェノール、ヒンダードアミン、チオエーテル、メルカプト化合物、亜リン酸エステル、ベンゾトリアゾール、ベンゾフェノン及びオゾン劣化防止剤。

The components of each example are as follows:
Unsaturated reactive polyolefins: for example EPDM, polyolefin acrylate and halobutyl having a molecular weight Mn of 100-100,000 Da, preferably 100-500,000 Da
Olefin polymers: polyethylene, polypropylene, polybutene, polyisobutene, butyl rubber (polyisobutene / isoprene), styrene block copolymers (and modified products thereof), and all olefin polymers have a molecular weight Mn of 100 to 1,000,000 Da, Preferably 100-300,000 Da;
Silane: DFDA-5451NT (silane graft PE manufactured by Dow Chemical Co.), DFDA-5541NT (moisture curing catalyst manufactured by Dow Chemical Co.), amorphous polyalphaolefin (for example, but not limited to Vestplast 206, Vestplast 2412), alkoxysilane, Aminosilane;
Inert fillers: heavy and light chalk, silicate, silicon oxide, carbon black, CaCO ₃ , Ca (OH) ₂ , titanium dioxide, silicates include talc, kaolin, mica, silicon oxide, silica And selected from the group comprising calcium silicate or magnesium silicate;
Moisture scavengers (eg CaO) or desiccants (eg molecular sieves, silica gel and calcium sulfate);
Anti-aging agent: hindered phenol, hindered amine, thioether, mercapto compound, phosphite, benzotriazole, benzophenone and ozone deterioration inhibitor.

[0037]
The above description of the present invention is merely exemplary in nature, and modifications that do not depart from the gist of the present invention are also included in the scope of the present invention. Such variations are not to be regarded as a departure from the spirit and scope of the present invention.

Claims (20)

Edge seals for the production of double or multi-layer glass or solar modules, wherein the edge seal contains a sealant and a binder, the sealant containing a polymer modified with a special reactive group The following total composition:
a) an unsaturated or reactive polyolefin or combination thereof in an amount of about 10 to 80% by weight of the total composition;
b) an olefinic polymer or combination thereof formulated in an amount of from about 5 to about 80% by weight of the total composition;
c) at least one filler in an amount of about 10 to about 60% by weight of the total composition;
d) at least one desiccant or moisture scavenger formulated in an amount of about 2.5 to about 25% by weight of the total composition;
e) The edge seal having at least one antioxidant comprising an antioxidant or UV stabilizer formulated in an amount of about 0.1 to about 3% by weight of the total composition.   The olefin polymer is blended in an amount of about 5 to about 50% by weight of the total composition, and the silane-modified polymer is blended in an amount of about 5 to about 30% by weight of the total composition. Edge seal as described in.   The edge seal according to claim 2, wherein the filler further comprises a particulate filler formulated in an amount of from about 5 to about 50% by weight of the total composition.   The olefin polymer is polyisobutylene, polybutene, butyl rubber (polyisobutylene / isoprene), styrene block copolymer, SBS (styrene / butadiene / styrene), SIS (styrene / isoprene / styrene), SEBS (styrene / ethylene / butylene / styrene). Styrene), SEPS (styrene / ethylene / propylene / styrene), SIBS (styrene / isoprene / butadiene / styrene), SPIBS (styrene / polyisobutylene / styrene) and modified products thereof, and amorphous copolymers of α-olefin and The edge seal according to claim 2, wherein the edge seal is selected from the group consisting of ternary copolymers (APAO).   Silane modified polymer is polyisobutylene, polybutene, butyl rubber (polyisobutylene / isoprene), styrene block copolymer, SBS (styrene / butadiene / styrene), SIS (styrene / isoprene / styrene), SEBS (styrene / ethylene / butylene / styrene). Styrene), SEPS (Styrene / Ethylene / Propylene / Styrene), SIBS (Styrene / Isoprene / Butadiene / Styrene), SPIBS (Styrene / Polyisobutylene / Styrene), and Alpha Olefin Amorphous Copolymer and / or Ternary The edge seal according to claim 2, wherein the edge seal is selected from the group consisting of copolymers (APAO). The APAO polymer has the formula (1):

Wherein, -A- is _{- (CH 2) m - (} 2),
_{-S- (CH 2) m - (} 3) or

And
R ¹ and R ² are the same or different and are an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an aralkyl group having 7 to 20 carbon atoms,
X is a hydroxyl group or a hydrolyzable group,
a is 0, 1, 2 or 3, b is 0, 1 or 2, the sum of a and b is 1 or more, n is an integer of 0 to 18, and m is an integer of 0 to 4. And R ³ is

The edge seal according to claim 5, wherein the edge seal is modified with at least one group of which is a terminal group or is statistically distributed in the molecular chain.   4. The edge seal of claim 3, wherein the sealant particulate filler is selected from the group comprising heavy and light chalk, silicates, lime, silicon oxide and carbon black.   8. The edge seal according to claim 7, wherein the sealant chalk is a surface-treated calcium carbonate.   8. An edge seal according to claim 7, wherein the silicate of the sealant is selected from the group consisting of talc, kaolin, mica, silicon oxide, silica and calcium silicate or magnesium silicate.   The sealant desiccant or moisture scavenger is selected from the group consisting of molecular sieves, phosphorus pentoxide, calcium oxide, anhydrous salts, epoxidized vegetable oils, carbodiimides, p-toluenesulfonyl isocyanate, or combinations thereof. Edge seals.   The edge seal according to claim 1, wherein the desiccant or moisture scavenger of the sealant is selected from 3A to 10A type molecular sieve (zeolite).   The sealant anti-aging agent is selected from the group comprising hindered phenols, thioethers, mercapto compounds, phosphites, benzotriazoles, benzophenones, HALS (hindered amine light stabilizers) and antioxidants. Edge seal.   The edge seal according to claim 1, wherein the unsaturated or reactive polyolefin is selected from the group consisting of EPDM, polyolefin acrylate, and halobutyl.   The olefin polymer is blended in an amount of about 30 to about 50% by weight, has an Mn of about 5,000D to about 1,000,000D, and an amount of about 5 to about 25% by weight of the silane-modified polymer. The edge seal of claim 2, wherein the desiccant or moisture scavenger is formulated in an amount up to about 15% by weight of the total composition. A first substrate;
A second substrate;
At least one photovoltaic cell disposed between the first substrate and the second substrate;
A solar module comprising a sealant in contact with the first substrate and the second substrate to form a water vapor barrier to prevent water vapor from reaching at least one photovoltaic cell, the sealant comprising:
With unsaturated or reactive polyolefins;
An olefin polymer;
At least one of silane-modified APAO and silane-modified polyisobutylene;
At least one filler;
At least one of a moisture scavenger or desiccant;
Contains at least one anti-aging agent,
The solar module, wherein the sealant electrically insulates photovoltaic cells.   The solar module according to claim 15, wherein at least one of the first substrate and the second substrate is at least one of glass, a polymer, and a metal.   Polyisobutylene in which the unsaturated or reactive polyolefin is blended in an amount of from about 10 to about 80% by weight of the total composition, and the olefinic polymer is blended in an amount of from about 5 to about 50% by weight of the total composition. And at least one of silane-modified APAO and silane-modified polyisobutylene is formulated in an amount of about 5 to about 30% by weight of the total composition, and the filler is about 10 to about 60% by weight of the total composition. In an amount of at least one moisture scavenger or desiccant in an amount of about 2.5 to about 25% by weight of the total composition, and an anti-aging agent is 0.1% of the total composition. The solar module of claim 15, wherein the solar module is formulated in an amount of about 3% by weight. A compound used in a solar module having photovoltaic cells, wherein the compound is
With unsaturated or reactive polyolefins;
An olefin polymer;
At least one of silane-modified APAO and silane-modified polyisobutylene;
At least one filler;
At least one of a moisture scavenger or desiccant;
Contains at least one anti-aging agent,
The compound wherein the compound electrically insulates the photovoltaic cells.   Polyisobutylene in which the unsaturated or reactive polyolefin is blended in an amount of from about 10 to about 80% by weight of the total composition, and the olefinic polymer is blended in an amount of from about 5 to about 50% by weight of the total composition. And at least one of silane-modified APAO and silane-modified polyisobutylene is formulated in an amount of about 5 to about 30% by weight of the total composition, and the filler is about 10 to about 60% by weight of the total composition. In an amount of at least one moisture scavenger or desiccant in an amount of about 2.5 to about 25% by weight of the total composition, and an anti-aging agent is 0.1% of the total composition. 19. A compound according to claim 18 formulated in an amount of from about 3% by weight. A sealing compound for a solar module having a first substrate and a second substrate, wherein the sealing compound is disposed between the first substrate and the second substrate, the sealing compound comprising:
With unsaturated or reactive polyolefins;
An olefinic polymer in an amount greater than about 30% by weight of the total composition;
At least one of silane-modified APAO and a silane-modified polymer in an amount of less than 35% by weight of the total composition;
With fillers;
Carbon black having a primary particle size of less than about 60 nm;
At least one of a moisture scavenger or desiccant;
The sealing compound containing an anti-aging agent.

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