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WO2006025953A1 - Produits de perméabilité réduite et méthodes de fabrication et d’utilisation desdits produits - Google Patents

Produits de perméabilité réduite et méthodes de fabrication et d’utilisation desdits produits Download PDF

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Publication number
WO2006025953A1
WO2006025953A1 PCT/US2005/025085 US2005025085W WO2006025953A1 WO 2006025953 A1 WO2006025953 A1 WO 2006025953A1 US 2005025085 W US2005025085 W US 2005025085W WO 2006025953 A1 WO2006025953 A1 WO 2006025953A1
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Prior art keywords
barrier coating
curable silicone
optionally
product
composition
Prior art date
Application number
PCT/US2005/025085
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English (en)
Inventor
Eric Jude Joffre
Robert Peter Mortensen
Rochelle Nesbitt
Original Assignee
Dow Corning Corporation
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Filing date
Publication date
Application filed by Dow Corning Corporation filed Critical Dow Corning Corporation
Publication of WO2006025953A1 publication Critical patent/WO2006025953A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/048—Forming gas barrier coatings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
    • C08J2383/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • 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
    • E06B3/66342—Section members positioned at the edges of the glazing unit characterised by their sealed connection to the panes

Definitions

  • This invention relates to a product having low moisture permeability or low gas permeability, or both.
  • the product is a silicone having a barrier coating that lowers permeability as compared to the uncoated silicone.
  • the product finds use in insulating glass units.
  • Silicones such as silicone elastomers, may suffer from high moisture permeability or high gas permeability, or both.
  • High moisture permeability may allow moisture to collect between the glass panes in an insulating glass unit, which can result in misting of the panes.
  • a vapor barrier filler such as mica, talc, or a combination thereof is incorporated in a curable silicone composition to reduce moisture vapor transmission.
  • this method suffers from the drawback that high levels of the vapor barrier filler may result in a curable silicone composition that is difficult to handle and that may cure to form a silicone having undesirably high modulus. Lower levels of the vapor barrier filler may not provide sufficient lowering of moisture permeability, gas permeability, or both.
  • Barrier coatings have been proposed to reduce moisture permeability and gas permeability of various organic materials, such as organic elastomers.
  • silicones typically have low surface energy, which makes adhesion of a barrier coating difficult.
  • the problem to be solved is to provide a silicone having a barrier coating adhered to the silicone to produce a product having low moisture permeability, low gas permeability, or both.
  • a barrier coating may be adhered to a silicone by applying a barrier coating composition to a curable silicone composition before completion of surface cure of the curable silicone composition. Curing the resulting coated curable silicone composition may provide a product having reduced moisture permeability, reduced gas permeability, or both.
  • a method comprises:
  • “Combination” means two or more items put together by any means or method.
  • “Surface cure” means substantial completion of a chemical process by which molecules at the interface of a curable composition and ambient air are joined to other molecules by crosslinking into larger molecules to restrict molecular movements.
  • "Silicone elastomer” means a generally nontacky silicone having the consistency of rubber. Silicone elastomers are more highly crosslinked than silicone gels.
  • “Fisheyes” are flaws in the surface of a barrier coating allowing the silicone underneath to be visible to the naked eye.
  • “Surfactant” means a component in a combination that reduces surface tension of the combination.
  • Suitable curable silicone compositions are known in the art. Silicone compositions having various cure mechanisms may be used. Suitable cure mechanisms include, but are not limited to moisture curable compositions; condensation-reaction curable compositions, e.g., oxime curable, acetoxy curable, etc.; peroxide curable compositions; and hydrosilylation curable compositions.
  • Suitable cure mechanisms include, but are not limited to moisture curable compositions; condensation-reaction curable compositions, e.g., oxime curable, acetoxy curable, etc.; peroxide curable compositions; and hydrosilylation curable compositions.
  • the curable silicone compositions disclosed in GB 2 249 552 A are suitable for use in this invention.
  • the moisture curable silicone compositions disclosed in U.S. Patents 4,962,076; 5,051,455; and 5,053,442 are also suitable for use in this invention.
  • Patents 4,962,076; 5,051,455; and 5,053,442 disclosing moisture curable silicone compositions are hereby incorporated by reference.
  • An example of a moisture curable silicone composition suitable for use in this invention comprises: (i) a base polymer, (ii) a crosslinker, (iii) a catalyst, optionally (iv) a filler, optionally (v) a filler treating agent, optionally (vi) an adhesion promoter, and optionally (vii) a pigment.
  • Component (i) is a base polymer.
  • Component (i) may be a polyorganosiloxane having moisture reactive functional groups, such as hydroxyl groups, alkoxy groups, or a combination thereof.
  • Component (i) may comprise an alkoxy-endblocked polydiorganosiloxane, a trialkoxysilethylene-endblocked polydiorganosiloxane, a hydroxyl- endblocked polydiorganosiloxane, or a combination thereof.
  • suitable base polymers include a vinyl-terminated, polydimethylsiloxane reaction product with (trimethoxysilylethyl)tetramethyldisiloxane and are disclosed in U.S. Patents 4,962,076; 5,051,455; and 5,053,442.
  • Component (ii) is a crosslinker added to the curable silicone composition in an amount sufficient cure the curable silicone composition.
  • Component (ii) may comprise an alkoxysilane, a dialkoxysilane, such as a dialkyldialkoxysilane; a trialkoxysilane, such as an alkyltrialkoxysilane; a tetraalkoxysilane; or partial or full hydrolysis products thereof or other combination thereof.
  • alkoxysilanes may have the general formula R 1 a Si(OR 2 ) 4-a , where each R 1 is independently a monovalent hydrocarbon group such as an alkyl group, each R 2 is independently an alkyl group of 1 to 6, alternatively 1 to 4, carbon atoms, and a is 2, 3, or 4.
  • suitable trialkoxysilanes include methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, and combinations thereof, and alternatively methyltrimethoxysilane.
  • suitable tetraalkoxysilanes include tetraethoxysilane.
  • crosslinkers are disclosed in U.S. Patents 4,962,076; 5,051,455; and 5,053,442.
  • Component (iii) is a catalyst added to the curable silicone composition in an amount sufficient to promote cure of the curable silicone composition.
  • Component (iii) may comprise a tin catalyst, a titanium catalyst, or a combination thereof.
  • Suitable tin catalysts include, but are not limited to dibutyl tin dilaurate, dibutyl tin oxide, stannous octoate, tin oxide, and combinations thereof.
  • Suitable titanium catalysts include, but are not limited to, a chelated titanium compound, a tetraalkoxytitanate, or a combination thereof.
  • titanium catalysts include, but are not limited to, diisopropoxytitanium bis(ethylacetoacetate), tetrabutoxy titanate, and combinations thereof. Examples of catalysts are disclosed in U.S. Patents 4,962,076; 5,051,455; and 5,053,442.
  • Component (iv) is an optional component that may be added to the curable silicone composition.
  • Component (iv) is a filler that may comprise aluminum oxide, calcium carbonate, carbon, chromic oxide, clay, diatomaceous earth, graphite, iron oxide, glass fibers, magnesium oxide, mica, quartz, quartz carbon, silica, talc, titanium dioxide, zinc oxide, zirconium oxide, zirconium silicate, a combination thereof, or a filler disclosed as component (B) of the barrier coating composition, in addition to, or instead of all or a portion of fillers exemplified above. Examples of fillers are disclosed in U.S. Patents 5,051,455 and 5,053,442.
  • Component (iv) may optionally be surface treated with component (v), a filler treating agent.
  • the filler may be treated with the filler treating agent before the filler is added to the composition, or in situ.
  • Component (v) may comprise a cyclic polyorganosiloxane or a fatty acid such as an oleic acid, a stearate, a stearic acid, or a combination thereof.
  • cyclic polyorganosiloxanes include octamethylcyclotetrasiloxane.
  • stearates include calcium stearate.
  • filler treating agents are disclosed in U.S. Patents 5,051,455 and 5,053,442.
  • Component (vi) is an optional component that may be added to the curable silicone composition.
  • Component (vi) is an adhesion promoter.
  • Component (vi) may comprise an amino-functional alkoxysilane (different from the alkoxysilane used as component (ii)), a mercapto-functional compound, or a combination thereof. Suitable amino-functional alkoxysilanes include gamma-aminopropyltriethoxysilane, gamma- aminopropyltrimethoxysilane, (ethylenediaminepropyl)trimethoxysilane, and combinations thereof.
  • Suitable mercapto-functional compounds include an organomercaptan, a mercapto containing silane, or a combination thereof. Suitable mercapto containing silanes include 3- mercaptoproyltrimethoxysilane. Suitable mercapto-functional compounds are disclosed in U.S. Patent 4,962,076.
  • Component (vii) is an optional component that may be added to the curable silicone composition. Component (vii) comprises a pigment such as carbon black. Examples of pigments are disclosed in U.S. Patents 4,962,076; 5,051,455; and 5,053,442.
  • Suitable barrier coating compositions and the barrier coatings obtained therefrom are known in the art, see for example, U.S. Patent 6,087,016, which is hereby incorporated by reference for the purpose of disclosing suitable barrier coating compositions and the barrier coatings obtained therefrom.
  • the barrier coating composition used in this invention may comprise: (A) an organic polymer, optionally (B) an exfoliated layer platelet-like filler, (C) a surfactant, optionally (D) a pH adjusting agent, optionally (E) a thickener, optionally (F) a cure package, and optionally (G) a carrier.
  • the solids content of this barrier coating composition may be less than 30%, alternatively 5 to 17%.
  • the ratio of (A) the elastomeric polymer to (B) the filler may be 20: 1 to 1:1.
  • Component (A) may be present in the barrier coating composition an amount of 1 to 30% (and 45 to 95% in the barrier coating formed from the barrier coating composition).
  • Component (A) may comprise a curable polymer, a partially cured polymer, or an uncured polymer.
  • Component (A) may be free of fluorinated species.
  • Component (A) includes without limitation, olefinic thermoplastic elastomer; polyamide thermoplastic elastomer; polybutadiene thermoplastic elastomer, e.g., syndiotactic 1,2-polybutadiene thermoplastic elastomer; polyester thermoplastic elastomer; polyurethane thermoplastic elastomer, e.g., thermoplastic polyester-polyurethane elastomer, thermoplastic polyether- polyurethane elastomer; styrenic thermoplastic elastomer; vinyl thermoplastic elastomer, e.g., polyvinyl chloride polyol, polyvinylidene chloride; and combinations thereof.
  • olefinic thermoplastic elastomer includes without limitation, olefinic thermoplastic elastomer; polyamide thermoplastic elastomer; polybutadiene thermoplastic elastomer, e.g., syndiotactic 1,2-poly
  • component (A) may comprise a rubber polymer including acrylic rubber, e.g., ethylene-acrylate copolymer; or butadiene rubber, e.g., polybutadiene.
  • Butyl- containing polymers useful as component (A) may include, without limitation, curable, partially cured, or uncured butyl rubber, such as isobutylene-isoprene copolymer; bromobutyl rubber, e.g., bromoisobutylene-isoprene copolymer; chlorobutyl rubber, e.g., chloroisobutylene-isoprene copolymer; and isobutylene rubber.
  • component (A) may comprise chlorosulfonated polyethylene rubber, e.g., chlorosulfonated polyethylene; epichlorhydrin rubber; ethylene-propylene rubber; e.g., ethylene-propylene copolymer or ethylene-propylene-diene copolymer.
  • chlorosulfonated polyethylene rubber e.g., chlorosulfonated polyethylene; epichlorhydrin rubber; ethylene-propylene rubber; e.g., ethylene-propylene copolymer or ethylene-propylene-diene copolymer.
  • component (A) may comprise an elastomer such as neoprene rubber, e.g., polychloroprene; nitrile rubber, e.g., acrylonitrile-butadiene copolymer; polyisoprene rubber; polysulfide rubber; polyurethane; propylene oxide rubber; and styrene-butadiene rubber, e.g., styrene-butadiene copolymer.
  • neoprene rubber e.g., polychloroprene
  • nitrile rubber e.g., acrylonitrile-butadiene copolymer
  • polyisoprene rubber e.g., polysulfide rubber
  • polyurethane e.g., propylene oxide rubber
  • styrene-butadiene rubber e.g., styrene-butadiene copolymer.
  • Component (A) may have the form of a solution, dispersion, latex, suspension, or emulsion in water, solvent, or a combination thereof.
  • Component (B) is an optional filler that may be added to the barrier coating composition.
  • Component (B) may be present in the barrier coating composition at 1 to 10% (and 5 to 55% in the barrier coating formed from the barrier coating composition).
  • Component (B) may have an aspect ratio greater than 25, alternatively greater than 100, alternatively 25 to 30,000, and alternatively 100 to 30,000.
  • Component (B) may comprise an exfoliated layered platelet filler.
  • Component (B) may comprise a filler having a flake form.
  • Suitable fillers include, but are not limited to aluminum, layered silicates, mica, and combinations thereof.
  • Suitable layered silicates are exemplified by beidellite, bentonite, hectorite, kenyaite, laponite, ledikite, magadiite, montmorillonite, nontronite, saponite, sauconite, vermiculite, volkonskoite, and combinations thereof.
  • component (B) may comprise mica, vermiculite, and combinations thereof.
  • Component (C) is a surfactant such as an anti-foaming agent, dispersing agent, emulsifier, leveling agent, wetting agent, or combination thereof.
  • Component (C) may comprise an anionic surfactant, a cationic surfactant, or a nonionic surfactant.
  • component (C) may comprise a wetting agent and an anti-foaming agent.
  • Component (C) may be added in an amount sufficient to provide up to 10% of the barrier coating prepared from the barrier coating composition.
  • the composition may further comprise an optional component.
  • suitable optional components include (D) a pH adjusting agent, (E) a thickener, (F) a cure package, (G) a carrier, and combinations thereof.
  • Component (D) is a pH adjusting agent.
  • Component (D) may be an acid or base added to prevent agglomeration of component (B).
  • Component (D) may be added in an amount sufficient to provide the barrier coating composition with a pH of 8 to 11.
  • Component (E) is a thickener.
  • Component (E) may be used to control viscosity of a barrier coating composition.
  • Component (E) may comprise lithium chloride, a polyvinyl alcohol terpolymer, or xanthan gum, e.g., Keltrol xanthan gum, which is commercially available from CP Kelco.
  • Component (E) may be present in an amount of 0.3% to 5.5%, alternatively 3% to 5.5%, based on the weight of the barrier coating composition. [0038] Without wishing to be bound by theory, it is thought that viscosity of the barrier coating composition may be controlled to prevent fisheyes in the barrier coating formed from the barrier coating composition.
  • a suitable barrier coating compositions such as those disclosed in examples 1-5, infra, may have a viscosity of 1,000 to 5,000; alternatively 3,000 to 5,000 centiPoise (measured with a Brookfield viscometer at 0.3 revolutions per minute at 23 °C.) when applied to a curable silicone composition, such as that in reference example 1, infra.
  • a curable silicone composition such as that in reference example 1, infra.
  • Component (F) is an optional component that can be used to affect curing of a curable barrier coating composition.
  • Component (G) is a carrier in which the other components of the barrier coating composition may be dissolved or dispersed. Suitable carriers include, without limitation, water and organic solvents such as hydrocarbons, and combinations thereof.
  • Suitable barrier coating compositions are commercially available from, for example, InMat, Inc. of Hillsoborugh, New Jersey, U.S.A. and include AIR D-FENSE® 2000 and AIR D-FENSE® 3500 S, both of which are butyl rubber dispersions advertised at www.inmat.com/productspecs-temp.htm.
  • barrier coating compositions include vinylidene chloride copolymer dispersions such as SERFENE® 400, available from Rohm & Haas of Philadelphia, Pennsylvania, U.S.A., and DIOF AN® A050, available from Solvin, a division of Solvay Polymers, Inc. of Houston, Texas, 77227, U.S.A.
  • the product of this invention may be prepared by a method comprising: 1) applying the barrier coating composition to a surface of the curable silicone composition before completion of surface cure of the curable silicone composition; and thereafter 2) curing the curable silicone composition to form a silicone.
  • the barrier coating composition may be applied to the curable silicone composition by any convenient means, such as dip coating, spraying, or brushing. Curing the curable silicone composition may be performed by any convenient means depending on the cure mechanism of the curable silicone composition selected. For example, curing may be performed by exposing the curable silicone composition to moisture, heat, UV radiation, or combinations thereof.
  • the method of this invention may optionally further comprise: 3) sealing an insulating glass unit with the product of step 2).
  • the amount of barrier coating composition depends on various factors including the type of barrier coating composition, the type of curable silicone composition, and the end use of the product. However, the amount of barrier coating composition is sufficient to form a barrier coating that reduces moisture permeability or gas permeability, or both, of the product of step 2).
  • the barrier coating may have a thickness of 0.5 mil (0.01 millimeter) to 10 mils (0.3 mm), alternatively 1 mil (0.02 mm) to 3 mils (0.08 mm), in the product of step 2).
  • the barrier coating composition is applied to the surface of the curable silicone composition before completion of surface cure of the curable silicone composition, i.e., before the surface is cured.
  • timing for application of the barrier coating composition depends on various factors including the cure speed of the specific curable silicone composition selected and the specific barrier coating composition selected. For example, when AIR D-FENSE® 2000 is used as the barrier coating composition for the moisture curable silicone composition described in reference example 1, infra, timing for application of the AIR D-FENSE® 2000 may be 6 to 10 minutes after beginning exposure of the moisture curable silicone composition to atmospheric moisture. One skilled in the art would be able to determine the timing for application of the barrier coating composition to the curable silicone composition without undue experimentation.
  • the product of this invention may be used for sealing an insulating glass unit.
  • the product may be used as a secondary sealant in an insulating glass unit, such as the unit shown in Figure 1.
  • the barrier coating composition used to form the barrier coating 101 may be applied to the curable silicone composition used to form the silicone 102 at any time before, during, or after applying the curable silicone composition to the glass panes 105 and spacer 104, which is secured to the glass panes 105 by a primary seal 103.
  • the silicone may be a silicone elastomer
  • the barrier coating may be an organic elastomer. Using a silicone elastomer and an organic elastomer may provide flexibility and improved product life when the insulating glass unit is exposed to ambient temperature conditions that may cause the insulating glass unit to expand and contract.
  • a film of a curable silicone composition DOW CORNING® 3-0117 Insulating Glass Sealant, which is commercially available from Dow Corning Corporation of Midland, Michigan, 48686, U.S.A., is cured.
  • the oxygen permeability of the resulting cured silicone is measured using a Mocon Ox-tran 2/20 analyzer (Mocon).
  • Mocon Mocon Ox-tran 2/20 analyzer
  • the permeability is 7358 x 10 10 cm -mm/ ⁇ rnHg-cm .s).
  • a slab of the curable silicone composition prepared in reference example 1 is cured.
  • AIR D-FENSE® 2000 is applied by brush to the resulting silicone when it is 21 days old.
  • the AIR D-FENSE® 2000 coating does not wet the surface of the silicone and make a uniform coating, as evidenced by fisheyes forming in the AIR D-FENSE® 2000 coating surface.
  • Example 1
  • a barrier coating composition is prepared by adding 1.05 grams (g) of Keltrol xanthan gum (CP Kelco) to 300 g of SERPENE® 400 vinylidene chloride copolymer dispersion (Rohm & Haas) and mixing until dispersed. The resulting thickened dispersion is applied to a film of uncured DOW CORNING® 3-0117 Insulating Glass Sealant two minutes after drawdown, using a disposable nylon brush. The barrier coating composition does not form f ⁇ sheyes on the curable silicone composition. The barrier coating composition dries to a continuous film. [0053] The curable silicone composition is then cured.
  • the oxygen permeability of the resulting product is measured using a Mocon Ox-tran 2/20 analyzer (Mocon).
  • Mocon Mocon Ox-tran 2/20 analyzer
  • the permeability is 236 x 10 10 cm 3 • mm/(cmHg-cm 2 .s). This permeability is 3% of the uncoated control in comparative example 1.
  • a barrier coating composition is prepared by adding, 1.05 g of Keltrol xanthan gum (CP Kelco) to 300 g of Diofan A050 PVDC dispersion (Solvin) and mixing until dispersed. The resulting thickened dispersion is applied to a film of uncured DOW CORNING® 3-0117 Insulating Glass Sealant two minutes after drawdown, using a disposable brush. The barrier coating composition does not form f ⁇ sheyes on the curable silicone composition. The barrier coating composition dries to a continuous film. [0055] The curable silicone composition is then cured. The oxygen permeability of the resulting product is measured using a Mocon Ox-tran 2/20 analyzer (Mocon). The permeability is 719 x 10 10 cm 3 -mm/(cmHg-cm 2 .s). This permeability was 10% of the uncoated control in comparative example 1.
  • Mocon Ox-tran 2/20 analyzer Mocon Ox-tran 2/20 analyzer
  • Example 3 A commercially available barrier coating composition, AIR D-FENSE® 2000, is applied as supplied to a film of uncured DOW CORNING® 3-0117 Insulating Glass Sealant ten minutes after drawdown, using a disposable brush.
  • the barrier coating composition does not form fisheyes on the curable silicone composition.
  • the barrier coating composition dries to a continuous film.
  • the curable silicone composition is then cured.
  • the oxygen permeability of the resulting product is measured using a Mocon Ox-tran 2/20 analyzer (Mocon).
  • Mocon Mocon Ox-tran 2/20 analyzer
  • the permeability is 98 x 10 10 cm 3 -mm/(cmHg-cm 2 .s). This permeability is 1% of the uncoated control in comparative example 1.
  • a commercially available barrier coating composition AIR D-FENSE® 2000, is applied as supplied to a film of uncured DOW CORNING® 3-0117 Insulating Glass Sealant ten minutes after drawdown, using a sprayer.
  • the barrier coating composition does not form fisheyes on the curable silicone composition.
  • the barrier coating composition dries to a continuous film.
  • the curable silicone composition is then cured.
  • the oxygen permeability of the resulting product is measured using a Mocon Ox-tran 2/20 analyzer (Mocon).
  • Mocon Mocon Ox-tran 2/20 analyzer
  • the permeability is 150 x 10 10 cm 3 -mm/(cmHg-cm 2 .s). This permeability is 2% of the uncoated control in comparative example 1.
  • a commercially available barrier coating composition AIR D-FENSE® 2000, is applied as supplied to a film of uncured DOW CORNING® 3-0117 Insulating Glass Sealant ten minutes after drawdown, using a disposable brush.
  • the barrier coating composition does not form fisheyes on the curable silicone composition.
  • the barrier coating composition dries to a continuous film.
  • a second coat of the barrier coating composition is applied the following day.
  • the oxygen permeability of a sample of the coated cured silicone is measured using a Mocon Ox-tran 2/20 analyzer (Mocon) after 1000 hours of exposure to ultra-violet light from a QUV exposure device using a cycle of 4 hours (hrs) 50 °C (condensation)/4 hrs 60 0 C
  • the product including a barrier coating adhered to a silicone is suitable for use as a secondary sealant in insulating glass units.
  • Figure 1 shows an end portion of an insulating glass unit of this invention.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)

Abstract

La présente invention a pour objet une méthode qui inclut : 1) l’application d’un revêtement protecteur sur la surface d’une formulation silicone durcissable avant la fin de la prise en surface de ladite formulation ; puis 2) la complétion de la prise de la formulation silicone durcissable pour former un matériau silicone. Le revêtement protecteur comprend un polymère organique. Le revêtement protecteur adhère à la surface du matériau silicone et réduit sa perméabilité aux gaz ou à l'humidité.
PCT/US2005/025085 2004-08-31 2005-07-15 Produits de perméabilité réduite et méthodes de fabrication et d’utilisation desdits produits WO2006025953A1 (fr)

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US60602104P 2004-08-31 2004-08-31
US60/606,021 2004-08-31

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011009359A1 (de) * 2011-01-25 2012-07-26 Technoform Glass Insulation Holding Gmbh Abstandshalterprofil und Isolierscheibeneinheit mit einem solchen Abstandshalterprofil
US8756879B2 (en) 2010-10-27 2014-06-24 Technoform Glass Insulation Holding Gmbh Spacer profile and insulating pane unit having such a spacer profile
US9810016B2 (en) 2012-02-10 2017-11-07 Technoform Glass Insulation Holding Gmbh Spacer profile for a spacer frame for an insulating glass unit with interspace elements and insulating glass unit
AU2021266331B2 (en) * 2020-11-12 2023-08-10 Hussmann Corporation Transparent door

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DE3021023A1 (de) * 1980-06-03 1981-12-10 Wacker-Chemie GmbH, 8000 München Verfahren zur herstellung von organopolysiloxanelastomeren und deren verwendung
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EP0192363A1 (fr) * 1985-02-06 1986-08-27 Bostik Limited Vitrage multiple
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WO1999001233A1 (fr) * 1997-06-30 1999-01-14 Ge Bayer Silicones Gmbh & Co. Kg Procede de revetement d'elastomeres de silicone
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8756879B2 (en) 2010-10-27 2014-06-24 Technoform Glass Insulation Holding Gmbh Spacer profile and insulating pane unit having such a spacer profile
DE102011009359A1 (de) * 2011-01-25 2012-07-26 Technoform Glass Insulation Holding Gmbh Abstandshalterprofil und Isolierscheibeneinheit mit einem solchen Abstandshalterprofil
EP2668361B1 (fr) 2011-01-25 2015-12-30 Technoform Glass Insulation Holding GmbH Profilé d'entretoise et vitrage isolant comprenant une telle entretoise
US10132114B2 (en) 2011-01-25 2018-11-20 Technoform Glass Insulation Holding Gmbh Spacer profile and insulating glass unit comprising such a spacer
EP2668361B2 (fr) † 2011-01-25 2023-11-15 Technoform Glass Insulation Holding GmbH Profilé d'entretoise et vitrage isolant comprenant une telle entretoise
US9810016B2 (en) 2012-02-10 2017-11-07 Technoform Glass Insulation Holding Gmbh Spacer profile for a spacer frame for an insulating glass unit with interspace elements and insulating glass unit
AU2021266331B2 (en) * 2020-11-12 2023-08-10 Hussmann Corporation Transparent door
AU2021266331C1 (en) * 2020-11-12 2024-01-11 Hussmann Corporation Transparent door

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