US20120199200A1 - Use of carbon black for oxidative and heat stability in solar module applications - Google Patents
Use of carbon black for oxidative and heat stability in solar module applications Download PDFInfo
- Publication number
- US20120199200A1 US20120199200A1 US13/501,938 US201013501938A US2012199200A1 US 20120199200 A1 US20120199200 A1 US 20120199200A1 US 201013501938 A US201013501938 A US 201013501938A US 2012199200 A1 US2012199200 A1 US 2012199200A1
- Authority
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- United States
- Prior art keywords
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- styrene
- sealant
- edge seal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 230000001590 oxidative effect Effects 0.000 title claims abstract description 14
- 239000006229 carbon black Substances 0.000 title claims description 50
- 239000000565 sealant Substances 0.000 claims abstract description 60
- 239000011521 glass Substances 0.000 claims abstract description 52
- 239000000203 mixture Substances 0.000 claims abstract description 48
- 229920000642 polymer Polymers 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910001868 water Inorganic materials 0.000 claims abstract description 25
- 239000000945 filler Substances 0.000 claims abstract description 24
- 239000002274 desiccant Substances 0.000 claims abstract description 19
- 230000032683 aging Effects 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 239000002516 radical scavenger Substances 0.000 claims abstract description 13
- 239000011256 inorganic filler Substances 0.000 claims abstract description 9
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 9
- 239000003381 stabilizer Substances 0.000 claims abstract description 7
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 6
- 235000006708 antioxidants Nutrition 0.000 claims abstract description 6
- 239000012963 UV stabilizer Substances 0.000 claims abstract description 5
- 239000007767 bonding agent Substances 0.000 claims abstract description 5
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 4
- 235000019241 carbon black Nutrition 0.000 claims description 49
- 150000001875 compounds Chemical class 0.000 claims description 47
- 238000007789 sealing Methods 0.000 claims description 30
- -1 styrene-ethylene-butylene-styrene Chemical class 0.000 claims description 21
- 229920002367 Polyisobutene Polymers 0.000 claims description 20
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 16
- 229910000077 silane Inorganic materials 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 14
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 10
- 229920005549 butyl rubber Polymers 0.000 claims description 8
- 239000002808 molecular sieve Substances 0.000 claims description 8
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 8
- 125000004432 carbon atom Chemical group C* 0.000 claims description 7
- 229920001083 polybutene Polymers 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 150000004760 silicates Chemical class 0.000 claims description 6
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 6
- 229920006132 styrene block copolymer Polymers 0.000 claims description 6
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 5
- 239000010419 fine particle Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical class [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 4
- 229920001897 terpolymer Polymers 0.000 claims description 4
- 239000004711 α-olefin Substances 0.000 claims description 4
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 235000012211 aluminium silicate Nutrition 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 3
- 239000012965 benzophenone Substances 0.000 claims description 3
- 150000008366 benzophenones Chemical class 0.000 claims description 3
- 150000001565 benzotriazoles Chemical class 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 235000012241 calcium silicate Nutrition 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 239000000391 magnesium silicate Substances 0.000 claims description 3
- 235000012243 magnesium silicates Nutrition 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 150000002989 phenols Chemical class 0.000 claims description 3
- 239000000454 talc Substances 0.000 claims description 3
- 229910052623 talc Inorganic materials 0.000 claims description 3
- 150000003568 thioethers Chemical class 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- 125000003710 aryl alkyl group Chemical group 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 2
- 150000003017 phosphorus Chemical class 0.000 claims description 2
- 239000010457 zeolite Substances 0.000 claims description 2
- VSKJLJHPAFKHBX-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical compound CC(=C)C=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 VSKJLJHPAFKHBX-UHFFFAOYSA-N 0.000 claims 4
- GJKZSOHUVOQISW-UHFFFAOYSA-N buta-1,3-diene;2-methylbuta-1,3-diene;styrene Chemical compound C=CC=C.CC(=C)C=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 GJKZSOHUVOQISW-UHFFFAOYSA-N 0.000 claims 4
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 claims 4
- 239000003707 silyl modified polymer Substances 0.000 claims 4
- 238000005382 thermal cycling Methods 0.000 claims 2
- VLJQDHDVZJXNQL-UHFFFAOYSA-N 4-methyl-n-(oxomethylidene)benzenesulfonamide Chemical compound CC1=CC=C(S(=O)(=O)N=C=O)C=C1 VLJQDHDVZJXNQL-UHFFFAOYSA-N 0.000 claims 1
- 150000001718 carbodiimides Chemical class 0.000 claims 1
- 239000004611 light stabiliser Substances 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 claims 1
- 235000015112 vegetable and seed oil Nutrition 0.000 claims 1
- 239000008158 vegetable oil Substances 0.000 claims 1
- 125000006850 spacer group Chemical group 0.000 description 25
- 229920001296 polysiloxane Polymers 0.000 description 14
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 229920001169 thermoplastic Polymers 0.000 description 8
- 239000004416 thermosoftening plastic Substances 0.000 description 8
- 230000008901 benefit Effects 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000004698 Polyethylene Substances 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 229920000573 polyethylene Polymers 0.000 description 5
- 229920001155 polypropylene Polymers 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 239000004014 plasticizer Substances 0.000 description 4
- 239000004590 silicone sealant Substances 0.000 description 4
- 229920002943 EPDM rubber Polymers 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002530 phenolic antioxidant Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920002239 polyacrylonitrile Polymers 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 0 C[3*]NC(=O)NC Chemical compound C[3*]NC(=O)NC 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- HPNMFZURTQLUMO-UHFFFAOYSA-N [H]N(CC)CC Chemical compound [H]N(CC)CC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- 230000006735 deficit Effects 0.000 description 2
- 239000005329 float glass Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 229920013639 polyalphaolefin Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 229920002742 polystyrene-block-poly(ethylene/propylene) -block-polystyrene Polymers 0.000 description 2
- 229920000346 polystyrene-polyisoprene block-polystyrene Polymers 0.000 description 2
- 229920001021 polysulfide Polymers 0.000 description 2
- 239000005077 polysulfide Substances 0.000 description 2
- 150000008117 polysulfides Polymers 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 description 2
- 239000012815 thermoplastic material Substances 0.000 description 2
- 238000006276 transfer reaction Methods 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229920013640 amorphous poly alpha olefin Polymers 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000012668 chain scission Methods 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical class [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 150000002430 hydrocarbons Chemical group 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000013008 moisture curing Methods 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000010399 physical interaction Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920002959 polymer blend Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000000045 pyrolysis gas chromatography Methods 0.000 description 1
- 238000000009 pyrolysis mass spectrometry Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical class [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000003017 thermal stabilizer Substances 0.000 description 1
- 238000002411 thermogravimetry Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/26—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers modified by chemical after-treatment
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/005—Modified block copolymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
- C08L53/025—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes modified
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
- E06B3/663—Elements for spacing panes
- E06B3/66309—Section members positioned at the edges of the glazing unit
- E06B3/66328—Section members positioned at the edges of the glazing unit of rubber, plastics or similar materials
Definitions
- This invention relates to an edge seal for solar modules, there being provided a sealant having carbon black for thermal and thermo-oxidative stability, while maintaining non-conductivity.
- insulating glass units comprising two-pane or multi-pane glass
- sealants and/or adhesives, spacers and desiccants or water scavengers for this purpose.
- Solar-module glazing both photovoltaic solar modules and solar modules for heating water
- the two glass panes can be replaced partially or completely by sheet metal and/or plastic film.
- the spacer consists primarily of metal (usually aluminum), is located in the edge area of the glass panes, and has the function of maintaining the two glass panes at the desired distance apart.
- a desiccant e.g. a molecular sieve
- the spacer is provided with small apertures (longitudinal perforation) on the side facing the interpane space. This arrangement prevents moisture from condensing on the inside of the glass panes at low ambient temperatures and impairing the transparency of the insulating glass unit.
- a seal based on polyisobutylene and/or butyl rubber is provided between the sides of the spacer that face the glass panes and the inner surfaces of the glass panes.
- This seal is generally known as the primary seal.
- the function of the primary seal is during production of the insulating glass panes, to be a kind of “assembly aid” while the glass panes are being joined to the spacer, which has been pre-coated with primary sealant, in order to hold the assembly together during the next production stages, and later, during the service life of the insulating glass unit, to form a water-vapor barrier that prevents moisture from penetrating from the exterior inwards into the interpane space, and, if the insulating glass unit is filled with gas, to prevent loss of this gas outwards from the interpane space.
- the secondary sealant As the outward-facing edge of the spacer is a few millimeters inside of the outside edges of the glass panes, a “channel” is formed into which the secondary sealant, as it is generally known, is injected.
- the main purpose of the secondary seal is to elastically bond the edge of the insulating glass unit (glass panes and spacer) and also to form a seal—which is to some extent an additional seal—against water and water vapor from the outside and gas from the inside (interpane space).
- the secondary seal consists of room-temperature-curing, two-part sealants and/or adhesives based on polysulfide, polyurethane or silicone.
- One-part systems, for example based on silicone, or a hot-melt butyl adhesive applied while hot, are also possible.
- metal spacers used there have the disadvantage of being good heat conductors and thus having a negative influence on an insulating glass pane's desirable low K-value, which, in the case of double- or multi-pane insulating glass, has been improved substantially in recent years by filling the interpane space with inert gas and using glass panes coated with low-emission (low-E) layers.
- low-E low-emission
- the DE 196 24 236 A1 describes a hot-melt adhesive composition for insulating glass, containing a mixture of at least one reactive binder based on silane-functional polyisobutylene, hydrogenated polybutadiene and/or poly- ⁇ -olefins, and a non-reactive binder from the group comprising the butyl rubbers, poly- ⁇ -olefins, diene polymers, polybutene or styrene block copolymers, which composition may be used as 1- or 2-part adhesive/sealant in the production of insulating glasses. No separate spacers comprising metal or plastic profiles are needed here, and no additional, secondary sealants.
- the DE 198 21 355 A1 describes a sealing compound for use in the production of multi-pane insulating glass; the compound contains silane-modified butyl rubber and serves as spacer between the individual panes of the multi-pane insulating glass. Here too, no secondary sealant is needed.
- the EP 1 615 272 A1 (or DE 10 2004 032 604 A1) contains a description of an exemplary method and device for assembling solar modules.
- thermoplastic material used combines the function of the spacer with that of the primary seal, as it is called. It also contains the desiccant.
- TPS thermoplastic spacer
- the outward-facing edge of the spacer is a few millimeters inside of the outer edges of the glass panes, and the remaining space is filled by the secondary seal, as it is called, which bonds the units elastically.
- the TPS system has, over the past ten years, proved to be completely unproblematic in insulating-glass fenestration applications.
- the present invention provides an edge seal which is free of the disadvantages described and which, especially also under high stresses (external influences due to incompatible materials, extremely high temperatures and UV radiation), ensures permanent stability of the TPS edge seal and thereby reliably prevents any deformation of movement of the thermoplastic spacer profile into the interpane space.
- the edge seal includes carbon black for oxidative and heat stability and non-conductivity.
- an edge seal for manufacturing two-pane or multi-pane insulating glass or solar modules includes a sealant and a bonding agent.
- the sealant contains a polymer modified with special reactive groups and has the following overall composition: olefinic polymers or combinations thereof included in an amount from about 10% to about 90% by weight of the total composition; at least one filler included in an amount from about 10% to about 65% by weight of the total composition; at least one inorganic filler that is a thermal and oxidative stabilizer in an amount from about 2% to about 30%; at least one of a desiccant or water scavenger included in an amount from about 2.5% to about 25% by weight of the total composition; and at least one aging resistor including an anti-oxidant or UV stabilizer included in an amount from about 0.1% to about 3% by weight of the total composition.
- an edge seal includes a primary sealant that contains a polymer modified with special groups and has the following overall composition:
- the sealing compound according to the invention adheres markedly better to other materials, in particular glass, metals and plastic, than is the case with prior-art sealing compounds.
- chemical bonds are formed by hydrolysis-condensation reactions between the modified polymer constituents and the chemically active groups (—Z—OH) of the substrate surface.
- silicone is used as secondary sealant
- the two sealants also bond additionally by way of cross-linking across the interface between the sealing compound and the silicone sealant during its curing.
- the TPS sealant and silicone secondary sealant thereby produce a seal which is substantially more stable toward external influences (e.g. plasticizer migration from incompatible materials), even at high temperatures and under exposure to alternating temperatures, so that any formation of “Girlande” is completely ruled out.
- the olefinic polymers are selected from the group comprising polyisobutylene, polybutene, butyl rubber (polyisobutylene-isoprene), styrene block copolymers, especially SBS, SIS, SEBS, SEPS, SIBS, SBIBS, also in modified form, and amorphous copolymers and/or terpolymers of ⁇ -olefins (APAO).
- polyisobutylene polybutene
- butyl rubber polyisobutylene-isoprene
- styrene block copolymers especially SBS, SIS, SEBS, SEPS, SIBS, SBIBS, also in modified form
- APAO amorphous copolymers and/or terpolymers of ⁇ -olefins
- the modified polymer can be selected from the group comprising polyisobutylene, polybutene, butyl rubber (polyisobutylene-isoprene), styrene block copolymers, especially SBS, SIS, SEBS, SEPS, SIBS, SBIBS, also in modified form, and amorphous copolymers and/or terpolymers of ⁇ -olefins (APAO), the polymer being modified with at least one group of formula (1) which is a terminal group or is distributed statistically within the chain
- 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,
- the fillers can be selected from the group comprising ground and precipitated chalks, silicates, silicon oxides, lime, and carbon blacks or soots.
- the invention also provides for the chalks to be surface-treated. However, it is also possible to use non-surface-treated chalks.
- the composition includes a thermal and oxidative stabilizing inorganic filler, such as, for example, carbon black.
- the silicates can be selected from the group comprising talc, kaolin, mica, silicon oxides, silicas and calcium or magnesium silicates. It is also with the scope of the invention for the water-binding substances to be selected from molecular sieves (zeolites) of types 3A to 10A. Of course, other substances that bond water chemically or physically may also be used. These include, but are not limited to, other desiccants such as silica gel, alumina, calcium sulfate, calcium chloride, magnesium sulfate, and potassium carbonate, and water scavengers such as calcium oxide.
- desiccants such as silica gel, alumina, calcium sulfate, calcium chloride, magnesium sulfate, and potassium carbonate
- water scavengers such as calcium oxide.
- the sealing compound either as a one-part sealing compound or as a two-part sealing compound.
- a one-part sealing compound all the components are mixed together during the production process.
- the olefinic polymers (a) are mixed together with some of the fine-particle inert fillers (c) and the water-binding fillers (d) in one part, e.g. part A; a second part, part B, is manufactured from some of the fine-particle inert fillers together with some of the olefinic polymers (a) and/or the entire quantity of modified polymers (b) and the aging resistors (e).
- the two parts of the compound are then mixed together immediately prior to application.
- the invention also provides for the aging resistors to be selected from the group comprising sterically hindered phenols, thioethers, mercapto compounds, phosphorus esters, benzotriazoles, benzophenones, HALS and antiozonants.
- inventive sealing compound for fabricating insulating glass for windows, conservatories, structural and roof glazing, for glazing in land-bound vehicles, watercraft and aircraft, and for manufacturing solar modules, including thermoelectric solar modules.
- test insulating-glass panes measuring 500 ⁇ 350 mm and constructed as 4 mm float glass/16 mm interpane space/4 mm float glass plus the edge seal consisting in the one instance of
- test pane 1 After only about 4-5 weeks of the weathering-cycle test, test pane 1) showed deformation, i.e., movement, of the thermoplastic spacer profile into the interpane space. This was caused by the incompatibility reactions (plasticizer migration from the EPDM profile and the one-part silicone sealant).
- Test pane 2 by contrast, showed no impairment of the edge seal whatsoever even after more than 50 weeks of the weathering-cycle test.
- the glass adhesion and the edge seal showed no recognizable impairment whatsoever after more than 4,000 hours of irradiation with UV lamps (Osram Ultravitalux) and temperatures at the pane surfaces of up to 110° C.
- An edge seal that can withstand stresses of this kind is thus suitable not only for insulating-glass applications in particularly demanding situations, e.g. frameless glazing in facades or roofs (known as structural glazing), but also, for example, for the edge seal in solar modules.
- the edge seal must not show any electrical conductivity, as this can cause fault current or short circuits between the contacts.
- silicone-based secondary seal this is no problem, since silicones typically show very high volume resistivities, mostly >10 14 Ohm ⁇ cm, and thus fall within the category of electrical insulators.
- carbon black as an inorganic filler promotes thermal stability and oxidative stability within the edge sealant.
- Nurox Carbon Black the carbon black content can be increased while maintaining low conductivity.
- carbon black acts as a thermal and oxidative stabilizer.
- Carbon black can affect the thermal decomposition of various polymers in an inert atmosphere by thermogravimetry/mass spectrometry (TGA-MS) and pyrolysis-gas chromatography/mass spectrometry (Pyrolosis-GC-MS).
- TGA-MS thermogravimetry/mass spectrometry
- Pyrolosis-GC-MS pyrolysis-gas chromatography/mass spectrometry
- the nature of substituents on the hydrocarbon chain of the polymers affects the thermal behavior of the mixtures with carbon black.
- Carbon black exhibits no influence on the decomposition of poly(methyl methacrylate) (PMMA) which has quaternary carbon atoms in the polymer chain and decomposes by depolymerization.
- PMMA poly(methyl methacrylate)
- polypropylene PP
- PE polyethylene
- PS polystyrene
- PAN polyacrylonitrile
- the char yield of PAN is increased significantly, however, carbon black has no impact on the amount of residue of non-char-forming polymers.
- Analysis of the pyrolysis products indicate that carbon black has influence through the chain cleavage and H-transfer reactions.
- the promotion of the chain scission reactions in PP is indicated by the lower decomposition temperature and the increased formation of products originating from the primary macroradicals. It appears that carbon black participates in the termination of the chain reactions, too, thus, the yield of oligomers is significantly reduced from the vinyl polymers.
- the increased yield of hydrogenated products also confirms that carbon black participates in the H-transfer reactions.
- inclusion of carbon black as a oxidative and thermal stabilizer in a sealant or sealing compound provides a sealant or sealing compound with a relative thermal index (RTI) of at least about 105° C. when verified by Underwriters Laboratories Inc.® (UL).
- RTI relative thermal index
- Olefinic polymer Polyethylene, polypropylene, polybutene, polyisobutene, butyl rubber (polyisobutene-isoprene) styrene block copolymers (in modified form as well): For all olefinic polymers Mol wt (Number average molecular weight 100-1,000, 000 Da, preferabaly 100-300,000 Da); Silanes: : DFDA-5451NT (silane grafted PE from Dow Chemical), DFDA-5481 NT (moisture curing catalyst from Dow Chemical), amorphous poly alpha olefins (such as and not restricted to Vestoplast 206, Vestoplast 2412), alkoxy silanes,
- Olefinic polymer Polyethylene, polypropylene, polybutene, polyisobutene, butyl rubber (polyisobutene-isoprene) styrene block copolymers (in modified form as well): For all
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Abstract
Description
- This patent application claims the benefit of U.S. Provisional Patent Application No. 61/251,551, filed on Oct. 14, 2009, and is a continuation-in-part of co-pending U.S. patent application Ser. No. 12/679,250, filed on Mar. 19, 2010, which claims the benefit of International Application No. PCT/DE/2008/001564, filed on Sep. 22, 2008, which claims the benefit of German priority document DE/10 2007 045 104.2, filed on Sep. 20, 2007. The contents of the above applications are incorporated herein by reference in their entirety.
- This invention relates to an edge seal for solar modules, there being provided a sealant having carbon black for thermal and thermo-oxidative stability, while maintaining non-conductivity.
- The construction of insulating glass units comprising two-pane or multi-pane glass is known. In addition to the glass panes, it is standard practice to use sealants and/or adhesives, spacers and desiccants or water scavengers for this purpose. Solar-module glazing (both photovoltaic solar modules and solar modules for heating water) is assembled in the same way, except that the two glass panes can be replaced partially or completely by sheet metal and/or plastic film.
- The spacer consists primarily of metal (usually aluminum), is located in the edge area of the glass panes, and has the function of maintaining the two glass panes at the desired distance apart. A desiccant (e.g. a molecular sieve) is contained additionally within the hollow spacer in order to keep the air or gas trapped between the panes dry. To enable the desiccant to absorb moisture at all, the spacer is provided with small apertures (longitudinal perforation) on the side facing the interpane space. This arrangement prevents moisture from condensing on the inside of the glass panes at low ambient temperatures and impairing the transparency of the insulating glass unit.
- Between the sides of the spacer that face the glass panes and the inner surfaces of the glass panes, a seal based on polyisobutylene and/or butyl rubber is provided. This seal is generally known as the primary seal. The function of the primary seal is during production of the insulating glass panes, to be a kind of “assembly aid” while the glass panes are being joined to the spacer, which has been pre-coated with primary sealant, in order to hold the assembly together during the next production stages, and later, during the service life of the insulating glass unit, to form a water-vapor barrier that prevents moisture from penetrating from the exterior inwards into the interpane space, and, if the insulating glass unit is filled with gas, to prevent loss of this gas outwards from the interpane space.
- As the outward-facing edge of the spacer is a few millimeters inside of the outside edges of the glass panes, a “channel” is formed into which the secondary sealant, as it is generally known, is injected. The main purpose of the secondary seal is to elastically bond the edge of the insulating glass unit (glass panes and spacer) and also to form a seal—which is to some extent an additional seal—against water and water vapor from the outside and gas from the inside (interpane space). As a rule, the secondary seal consists of room-temperature-curing, two-part sealants and/or adhesives based on polysulfide, polyurethane or silicone. One-part systems, for example based on silicone, or a hot-melt butyl adhesive applied while hot, are also possible.
- The systems described above, however, also have certain disadvantages. During production of the insulating glass units, a large number of materials have to be processed in a series of complicated and cost-intensive stages, some of which take place simultaneously.
- As far as the thermal insulation properties of the edge seal are concerned, metal spacers used there have the disadvantage of being good heat conductors and thus having a negative influence on an insulating glass pane's desirable low K-value, which, in the case of double- or multi-pane insulating glass, has been improved substantially in recent years by filling the interpane space with inert gas and using glass panes coated with low-emission (low-E) layers.
- Particularly as a consequence of the second disadvantage, increasing numbers of insulating glass systems have become available recently which, in place of aluminum as spacer, use: prefabricated stainless steel profiles (lower wall thickness possible and hence reduced heat flow); or prefabricated plastic profiles; or prefabricated thermoplastic profiles; or extrusion compound comprising thermoplastic materials extruded directly onto one of the glass panes. On account of the improved thermal insulation properties in the edge seal, these systems are also known as “warm-edge systems”. Examples of the above may be found in EP 517 067 A2, examples and application machinery for in EP 714 964 A1, EP 176 388 A1 and EP 823 531 A2.
- The DE 196 24 236 A1 describes a hot-melt adhesive composition for insulating glass, containing a mixture of at least one reactive binder based on silane-functional polyisobutylene, hydrogenated polybutadiene and/or poly-α-olefins, and a non-reactive binder from the group comprising the butyl rubbers, poly-α-olefins, diene polymers, polybutene or styrene block copolymers, which composition may be used as 1- or 2-part adhesive/sealant in the production of insulating glasses. No separate spacers comprising metal or plastic profiles are needed here, and no additional, secondary sealants.
- The DE 198 21 355 A1 describes a sealing compound for use in the production of multi-pane insulating glass; the compound contains silane-modified butyl rubber and serves as spacer between the individual panes of the multi-pane insulating glass. Here too, no secondary sealant is needed.
- Particularly those spacers extruded directly onto one of the glass panes also overcome the problems relating to the manufacturing process. As a result, insulating glass panes can be made using an automated process which is much more flexible and more productive.
- In the field of solar module manufacture, too, applying the spacer directly onto the module edges in this manner has proved to offer many advantages. Compared, for example, with the manual or semi-automatic fitting of pre-extruded butyl tapes, this solution brings not only optical advantages but also productivity advantages; in addition, it makes for a more reliable long-term barrier against water-vapor penetration and gas leakage. The EP 1 615 272 A1 (or DE 10 2004 032 604 A1) contains a description of an exemplary method and device for assembling solar modules.
- The thermoplastic material used combines the function of the spacer with that of the primary seal, as it is called. It also contains the desiccant. The TPS system (TPS=thermoplastic spacer) is an example of such a system.
- With these systems, too, the outward-facing edge of the spacer is a few millimeters inside of the outer edges of the glass panes, and the remaining space is filled by the secondary seal, as it is called, which bonds the units elastically.
- Where silicone is used as the secondary sealant in combination with a thermoplastic spacer such as the TPS system, it has been found that insulating glass units, including those filled with inert gas, can be manufactured substantially more reliably and retain their gastightness in the edge seal even after a large number of weathering cycles (EP 916 801 A2). It is very difficult to obtain equally low gas-leakage rates when using metallic spacers combined with a standard primary seal and a silicone-based secondary seal.
- Combined with polysulfide as secondary sealant, the TPS system has, over the past ten years, proved to be completely unproblematic in insulating-glass fenestration applications.
- However, particularly in cases where silicone is used as a secondary sealant, there is a disadvantage that can, in certain cases, manifest itself as an optical defect within the insulating glass units. A combination of:
-
- a) materials (e.g. weather seal, EPDM glazing profiles, etc.) which, due to external influences, are not compatible with the insulating-glass edge seal, and
- b) construction errors in the glazing area of the insulating glass units, caused by inadequate planning (poor ventilation/drainage of the glass rebate), and
- c) extreme exposure (particularly high temperatures at the insulating glass pane and in the edge seal) due to the situation of the installation can cause deformation or movement of the thermoplastic spacer profile into the interpane space. This phenomenon is also known in German as the “Girlanden-Effekt”. Depending on the quality of the TPS sealant used, (formulation/production process), there are marked differences in susceptibility to the external influences described under points a) to c). Where silicone is used as secondary sealant, the main reason may be assumed to be the lack of adhesion between the TPS sealant and the secondary seal, and the inadequate adhesion—based only on predominantly physical interactions—of the TPS sealant to the glass. This bond may be easily weakened to a greater or lesser extent by substances migrating into the glass/TPS sealant interface.
- Proposals for creating a connection of such kind between the TPS and the silicone secondary seal as to achieve mechanical anchorage or a frictional connection by way of a specially shaped cross-section for the extruded TPS profile (DE 102 04 174 A1) unfortunately cannot be implemented due to the impossibility of obtaining a suitably shaped die for extruding such a profile cross-section. Another problem with this proposal that has not been solved is exactly how to join up the beginning and the end of the spacer profile extruded onto the glass pane. For a normal rectangular cross-section, this has been described and solved in the EP 823 531 A2. A further difficulty with this proposal is encountered while applying the secondary sealant and consists in how to completely fill the partially convex voids within the TPS strand without incorporating any air bubbles. All in all, therefore, this proposal is one that cannot be implemented as such in an everyday production process, and accordingly does not establish the desired objective.
- Attempts to achieve chemical adhesion between the TPS sealant and the silicone sealant by selective addition of traditional, silane-based adhesion promoters to one and/or both sealants also fail. To this end, it is desirable to use grades and quantities which unfortunately have a negative influence on other desired properties, for example the working consistency of the TPS sealant, or which later on cause fogging in the insulating glass when the unit has been installed.
- Superior edge seals strongly inhibit the movement of moisture from the atmosphere to the water-sensitive interior areas of the solar modules, even after experiencing severe weather exposures including high humidities, high temperatures, and temperature cycling. Accordingly, it is important to have edge sealants that exhibit good oxidative and heat stability as well as low conductivity.
- The present invention provides an edge seal which is free of the disadvantages described and which, especially also under high stresses (external influences due to incompatible materials, extremely high temperatures and UV radiation), ensures permanent stability of the TPS edge seal and thereby reliably prevents any deformation of movement of the thermoplastic spacer profile into the interpane space. In addition, the edge seal includes carbon black for oxidative and heat stability and non-conductivity.
- In one form, an edge seal for manufacturing two-pane or multi-pane insulating glass or solar modules includes a sealant and a bonding agent. The sealant contains a polymer modified with special reactive groups and has the following overall composition: olefinic polymers or combinations thereof included in an amount from about 10% to about 90% by weight of the total composition; at least one filler included in an amount from about 10% to about 65% by weight of the total composition; at least one inorganic filler that is a thermal and oxidative stabilizer in an amount from about 2% to about 30%; at least one of a desiccant or water scavenger included in an amount from about 2.5% to about 25% by weight of the total composition; and at least one aging resistor including an anti-oxidant or UV stabilizer included in an amount from about 0.1% to about 3% by weight of the total composition.
- Further features, advantages, and areas of applicability will become apparent from the description provided herein. It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
- In accordance with the principles of the invention, an edge seal includes a primary sealant that contains a polymer modified with special groups and has the following overall composition:
- a) 30-60 wt. %, preferably 40 to 50 wt. %, olefinic polymers, number average molecular weight 400-1,000,000 D, preferably from 5,000 to 300,000 D
-
- b) 2-35 wt. %, preferably 5-25 wt. %, modified polymer
- c) 5-40 wt. %, preferably 10-30 wt. %, fine-particle, inert fillers
- d) 5-25 wt. %, preferably 10-15 wt. %, water-binding substances
- e) 0-3 wt. % aging resistors, in particular anti-oxidants or UV stabilizers, and that the secondary sealant is a silicone-based sealant.
- Thanks to the share of reactive groups bound to part of the primary sealant's polymer composition, the sealing compound according to the invention adheres markedly better to other materials, in particular glass, metals and plastic, than is the case with prior-art sealing compounds. In the invention, aside from the purely physical interactions which form the basis for glass adhesion in the prior art, chemical bonds are formed by hydrolysis-condensation reactions between the modified polymer constituents and the chemically active groups (—Z—OH) of the substrate surface. Where silicone is used as secondary sealant, the two sealants also bond additionally by way of cross-linking across the interface between the sealing compound and the silicone sealant during its curing. The TPS sealant and silicone secondary sealant thereby produce a seal which is substantially more stable toward external influences (e.g. plasticizer migration from incompatible materials), even at high temperatures and under exposure to alternating temperatures, so that any formation of “Girlande” is completely ruled out.
- In some implementations, the olefinic polymers are selected from the group comprising polyisobutylene, polybutene, butyl rubber (polyisobutylene-isoprene), styrene block copolymers, especially SBS, SIS, SEBS, SEPS, SIBS, SBIBS, also in modified form, and amorphous copolymers and/or terpolymers of α-olefins (APAO).
- The modified polymer can be selected from the group comprising polyisobutylene, polybutene, butyl rubber (polyisobutylene-isoprene), styrene block copolymers, especially SBS, SIS, SEBS, SEPS, SIBS, SBIBS, also in modified form, and amorphous copolymers and/or terpolymers of α-olefins (APAO), the polymer being modified with at least one group of formula (1) which is a terminal group or is distributed statistically within the chain
- where -A- is
-
—(CH2)m— (2), -
—S—(CH2)m— (3) or - and R1 and R2 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 and b is 0,1 or 2, the sum of a and b being greater than or equal to 1, and where n is a whole number between 0 and 18, m is a whole number between 0 and 4 and R3 is
- The fillers can be selected from the group comprising ground and precipitated chalks, silicates, silicon oxides, lime, and carbon blacks or soots. In this connection, the invention also provides for the chalks to be surface-treated. However, it is also possible to use non-surface-treated chalks.
- Further, in some forms, the composition includes a thermal and oxidative stabilizing inorganic filler, such as, for example, carbon black.
- The silicates can be selected from the group comprising talc, kaolin, mica, silicon oxides, silicas and calcium or magnesium silicates. It is also with the scope of the invention for the water-binding substances to be selected from molecular sieves (zeolites) of types 3A to 10A. Of course, other substances that bond water chemically or physically may also be used. These include, but are not limited to, other desiccants such as silica gel, alumina, calcium sulfate, calcium chloride, magnesium sulfate, and potassium carbonate, and water scavengers such as calcium oxide.
- It is possible to formulate the sealing compound either as a one-part sealing compound or as a two-part sealing compound. In the case of a one-part sealing compound, all the components are mixed together during the production process. In the case of a two-part sealing compound, the olefinic polymers (a) are mixed together with some of the fine-particle inert fillers (c) and the water-binding fillers (d) in one part, e.g. part A; a second part, part B, is manufactured from some of the fine-particle inert fillers together with some of the olefinic polymers (a) and/or the entire quantity of modified polymers (b) and the aging resistors (e). The two parts of the compound are then mixed together immediately prior to application.
- The invention also provides for the aging resistors to be selected from the group comprising sterically hindered phenols, thioethers, mercapto compounds, phosphorus esters, benzotriazoles, benzophenones, HALS and antiozonants.
- Last but not least, it is also within the scope of the invention to use the inventive sealing compound for fabricating insulating glass for windows, conservatories, structural and roof glazing, for glazing in land-bound vehicles, watercraft and aircraft, and for manufacturing solar modules, including thermoelectric solar modules.
- Principles of the invention are further explained in detail below by reference to a comparative example and several examples in accordance with the invention.
-
-
- a) 50 wt. % PIB of MW 60,000
- b) 20 wt. % carbon black
- c) 14 wt. % CaCO3
- d) 15 wt. % A3-type molecular sieve
- e) 1 wt. % phenolic antioxidant
-
-
- a) 42 wt. % PIB
- b) 12 wt. % silane-modified APAO or PIB
- c) 10 wt. % CaCO3
- d) 20 wt. % carbon black
- e) 15 wt. % A3-type molecular sieve
- f) 1 wt. % phenolic antioxidant
- The effect of the sealing compound of this invention compared to the prior art becomes evident from the following comparative test:
- To one long edge in each case of test insulating-glass panes measuring 500×350 mm and constructed as 4 mm float glass/16 mm interpane space/4 mm float glass plus the edge seal consisting in the one instance of
-
- 1) the sealing compound of the comparative example 1 as thermoplastic spacer and a conventional 2-part silicone as secondary sealant, and in the other instance of
- 2) the sealing compound according to embodiment 2 of the invention as thermoplastic spacer and the same conventional 2-part silicone as in 1) as secondary sealant,
an EPDM profile of the kind typically employed for glazing applications and having a plasticizer content of about 20% mineral oil is bonded using a one-part silicone sealant with a high silicone-plasticizer content, said profile thus being brought into direct contact with the edge-seal sealants. The test panes prepared in this way were then exposed to a weathering-cycle test (−20° C./+80° C. at 95-100% rel. humidity, 8 hours per cycle, 3 cycles per day).
- After only about 4-5 weeks of the weathering-cycle test, test pane 1) showed deformation, i.e., movement, of the thermoplastic spacer profile into the interpane space. This was caused by the incompatibility reactions (plasticizer migration from the EPDM profile and the one-part silicone sealant).
- Test pane 2), by contrast, showed no impairment of the edge seal whatsoever even after more than 50 weeks of the weathering-cycle test.
- Similarly, the glass adhesion and the edge seal showed no recognizable impairment whatsoever after more than 4,000 hours of irradiation with UV lamps (Osram Ultravitalux) and temperatures at the pane surfaces of up to 110° C.
- An edge seal that can withstand stresses of this kind is thus suitable not only for insulating-glass applications in particularly demanding situations, e.g. frameless glazing in facades or roofs (known as structural glazing), but also, for example, for the edge seal in solar modules.
- In addition to the first application of a strand of reactive butyl compound, it is also possible to apply a second strand of butyl before the solar module is pressed. This is a particularly useful solution in cases where the electrical contacts of the photovoltaic cells contained in the module are made to pass through the edge seal to the outside. After the first strand has been applied, the contacts—usually in the form of thin tape‘are channeled to the exterior and the second butyl strand is then extruded directly on top of the first one. The contacts are thereby embedded in the butyl compound, thus ensuring that in the finished solar module, the contact leads across the edge seal to the outside are gastight and impermeable to water vapor. Since the contacts are usually in the form of non-insulated metal tapes, the edge seal must not show any electrical conductivity, as this can cause fault current or short circuits between the contacts. In the case of a silicone-based secondary seal, this is no problem, since silicones typically show very high volume resistivities, mostly >1014 Ohm·cm, and thus fall within the category of electrical insulators. However, butyl sealants with a high filler content of carbon black—as in the case of the reactive butyl compound described here—have volume resistivities of <106 Ohm·cm, meaning that the compound would be electrically conductive.
- Reducing the carbon black content admittedly increases the volume resistivity, but also brings many disadvantages. Aside from mechanical reinforcement and viscosity regulation, the purpose of a high carbon black content in a butyl sealant is to make the mixture particularly stable toward high temperatures and UV irradiation. If the carbon black content were to be substantially reduced because of the volume resistivity, this would no longer be the case and the butyl sealing compound would no longer show the required long-term stability for applications in the field of solar modules, i.e. for applications involving high temperatures and solar radiation. By using a specialty carbon black in place of the carbon blacks generally used in butyl sealants, however, it is possible to obtain a reactive butyl compound that has all the required properties. It transpired that by selecting an oxidatively post-treated carbon black made by the furnace process and having a primary-particle size in the 50-60 nm range, a carbon black had been found which not only permitted filler contents of up to 20 wt. % for the reactive butyl compound, which are necessary for stabilization, mechanical reinforcement and viscosity regulation, but simultaneously result in a volume resistivity of >1010 Ohm·cm, which is fully adequate for the electrical insulating effect required of the reactive butyl sealing compound.
- In addition, it has been found that the use of carbon black as an inorganic filler promotes thermal stability and oxidative stability within the edge sealant. By using Nurox Carbon Black, the carbon black content can be increased while maintaining low conductivity. More specifically, in polymer blends containing polybutene and polyisobutylene, carbon black acts as a thermal and oxidative stabilizer. These results were not expected, since the carbon black was put into the formulation to inhibit reactions due to absorption of UV and visible light.
- Carbon black can affect the thermal decomposition of various polymers in an inert atmosphere by thermogravimetry/mass spectrometry (TGA-MS) and pyrolysis-gas chromatography/mass spectrometry (Pyrolosis-GC-MS). The nature of substituents on the hydrocarbon chain of the polymers affects the thermal behavior of the mixtures with carbon black. Carbon black exhibits no influence on the decomposition of poly(methyl methacrylate) (PMMA) which has quaternary carbon atoms in the polymer chain and decomposes by depolymerization. The decomposition of polypropylene (PP) is promoted, whereas, that of polyethylene (PE), polystyrene (PS) and polyacrylonitrile (PAN) is hindered in the presence of carbon black. The char yield of PAN is increased significantly, however, carbon black has no impact on the amount of residue of non-char-forming polymers. Analysis of the pyrolysis products indicate that carbon black has influence through the chain cleavage and H-transfer reactions. The promotion of the chain scission reactions in PP is indicated by the lower decomposition temperature and the increased formation of products originating from the primary macroradicals. It appears that carbon black participates in the termination of the chain reactions, too, thus, the yield of oligomers is significantly reduced from the vinyl polymers. The increased yield of hydrogenated products also confirms that carbon black participates in the H-transfer reactions.
- It has been established that the effect of thermal stability depends on the volatile content of the carbon blacks. Carbon black of high volatile content is able to initiate the decomposition of PP and PIB, whereas carbon blacks of low volatile content increase the thermal stability of the polymers. Carbon blacks affect the product distribution of polymers, the magnitude of the changes increases with increasing volatile content of the carbon black. Lower amount of α,ω-alkadienes and more n-alkanes are released from PE/carbon black composite indicating the occurrence of a hydrogenation process.
- In accordance with the principles of the invention, inclusion of carbon black as a oxidative and thermal stabilizer in a sealant or sealing compound provides a sealant or sealing compound with a relative thermal index (RTI) of at least about 105° C. when verified by Underwriters Laboratories Inc.® (UL).
- The following examples include the use of carbon black for oxidative and thermal stability in accordance with the principles of the invention:
-
-
- a) 40 wt. % PIB
- b) 10 wt. % silane-modified APAO or PIB
- c) 20 wt. % CaCO3
- d) 17 wt. % specialty carbon black
- e) 12 wt. % A3-type molecular sieve
- f) 1 wt. % phenolic antioxidant
-
-
Material Wt % Olefinic polymer 10 to 60 Silane modified polyolefins 5 to 30 C black 2 to 30 Inert fillers 10 to 60 Water scavenger 2.5 to 25 Aging Resistors 0 to 3 -
-
Material Wt % Olefinic polymer 20 to 60 Silane modified polyolefins 5 to 25 C black 2 to 25 Inert fillers 20 to 60 Water scavenger 2.5 to 25 Aging Resistors 0 to 3 -
-
Material Wt % Olefinic polymer 30 to 60 Silane modified polyolefins 10 to 25 C black 2 to 25 Inert fillers 30 to 60 Water scavenger 2.5 to 25 Aging resistor 0 to 2
Where for each of the examples the components are selected from: Olefinic polymer: Polyethylene, polypropylene, polybutene, polyisobutene, butyl rubber (polyisobutene-isoprene) styrene block copolymers (in modified form as well): For all olefinic polymers Mol wt (Number average molecular weight 100-1,000, 000 Da, preferabaly 100-300,000 Da); Silanes: : DFDA-5451NT (silane grafted PE from Dow Chemical), DFDA-5481 NT (moisture curing catalyst from Dow Chemical), amorphous poly alpha olefins (such as and not restricted to Vestoplast 206, Vestoplast 2412), alkoxy silanes, amino silanes; Inert fillers: ground and precipitated chalks, silicates, lime, silicon oxides, and Carbon black, CaCO3, Ca(OH)2, titanium dioxide, silicates to be selected from the group comprising talc, kaolin, mica, silicon oxide, silicas, and calcium or magnesium silicates; Water Scavengers such as CaO or desiccants such as molecular sieves, silica gel, and calcium sulfate; Aging Resistors: Hindered phenols, hindered amines, thioethers, mercapto compounds, phosphorous esters, benzotriazoles, benzophenones, and antiozonants. - The description of the invention is merely exemplary in nature and variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention.
Claims (28)
—(CH2)m— (2),
—S—(CH2)m— (3) or
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US13/501,938 US20120199200A1 (en) | 2007-09-20 | 2010-10-14 | Use of carbon black for oxidative and heat stability in solar module applications |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007045104A DE102007045104A1 (en) | 2007-09-20 | 2007-09-20 | Sealant for the production of double or multi-pane insulating glass or solar modules |
DE102007045104.2 | 2007-09-20 | ||
PCT/DE2008/001564 WO2009036752A1 (en) | 2007-09-20 | 2008-09-22 | Composite edge for producing double or multiple pane insulation glass or solar modules |
US25155109P | 2009-10-14 | 2009-10-14 | |
PCT/US2010/052727 WO2011056379A1 (en) | 2009-10-14 | 2010-10-14 | Use of carbon black for oxidative and heat stability in solar module applications |
US13/501,938 US20120199200A1 (en) | 2007-09-20 | 2010-10-14 | Use of carbon black for oxidative and heat stability in solar module applications |
Related Parent Applications (2)
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PCT/DE2008/001564 Continuation WO2009036752A1 (en) | 2007-09-20 | 2008-09-22 | Composite edge for producing double or multiple pane insulation glass or solar modules |
US67925010A Continuation | 2007-09-20 | 2010-03-19 |
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US20120199200A1 true US20120199200A1 (en) | 2012-08-09 |
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Application Number | Title | Priority Date | Filing Date |
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US12/679,250 Active US8372909B2 (en) | 2007-09-20 | 2008-09-22 | Composite edge for producing double or multiple pane insulation glass or solar modules |
US13/501,923 Abandoned US20120192946A1 (en) | 2007-09-20 | 2010-10-14 | Use of calcium oxide as a water scavenger in solar applications |
US13/501,938 Abandoned US20120199200A1 (en) | 2007-09-20 | 2010-10-14 | Use of carbon black for oxidative and heat stability in solar module applications |
US13/680,904 Active 2030-07-09 US9085708B2 (en) | 2007-09-20 | 2012-11-19 | Composite edge for producing double or multiple pane insulation glass or solar modules |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
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US12/679,250 Active US8372909B2 (en) | 2007-09-20 | 2008-09-22 | Composite edge for producing double or multiple pane insulation glass or solar modules |
US13/501,923 Abandoned US20120192946A1 (en) | 2007-09-20 | 2010-10-14 | Use of calcium oxide as a water scavenger in solar applications |
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US13/680,904 Active 2030-07-09 US9085708B2 (en) | 2007-09-20 | 2012-11-19 | Composite edge for producing double or multiple pane insulation glass or solar modules |
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US (4) | US8372909B2 (en) |
EP (2) | EP2420536A1 (en) |
JP (1) | JP5616224B2 (en) |
KR (1) | KR101496492B1 (en) |
CN (1) | CN101878263B (en) |
DE (1) | DE102007045104A1 (en) |
DK (1) | DK2190919T3 (en) |
EA (1) | EA018154B1 (en) |
PL (1) | PL2190919T3 (en) |
WO (1) | WO2009036752A1 (en) |
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Also Published As
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EP2190919A1 (en) | 2010-06-02 |
EP2420536A1 (en) | 2012-02-22 |
WO2009036752A1 (en) | 2009-03-26 |
US20110048509A1 (en) | 2011-03-03 |
DE102007045104A1 (en) | 2009-04-02 |
EA018154B1 (en) | 2013-05-30 |
JP2010539303A (en) | 2010-12-16 |
US9085708B2 (en) | 2015-07-21 |
PL2190919T3 (en) | 2013-01-31 |
US8372909B2 (en) | 2013-02-12 |
EP2190919B1 (en) | 2012-07-04 |
US20130079446A1 (en) | 2013-03-28 |
EA201000498A1 (en) | 2010-08-30 |
KR20100076977A (en) | 2010-07-06 |
DK2190919T3 (en) | 2012-10-08 |
US20120192946A1 (en) | 2012-08-02 |
CN101878263B (en) | 2013-08-14 |
CN101878263A (en) | 2010-11-03 |
KR101496492B1 (en) | 2015-02-26 |
JP5616224B2 (en) | 2014-10-29 |
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