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ARCHITECTURAL A inishes - Mid-American Glass

InishesARCHITECTURALALUMINUMFCONSIDERYOU ROPTIONS.. PAINTED FINISHES (ORGANIC COATINGS).. 2 Liquid Paint.. 3 Powder Coatings.. 5 Specifications Painted Finishes.. 6 Comparative Performance.. 7 ANODIZED FINISHES.. 8 Production Process.. 9 Class I or Class II Designations..11 Designations for Anodized aluminum Finishes..11 Specifications Anodized Finishes..11 Organic Dyes..11 QUICK GUIDE ..12 CARE CLEANING INSPECTION ..14 General Cleaning Painted and Anodized Finishes .. 16 Painted Finishes Removal of Stains and Mildew ..17 Anodized Finishes Removal of Stains ..17 Removal of Non-Water Soluble Deposits ..18 Protective Coatings..19 Insulating Coatings..20 Rework Procedures for Painted Finishes..20 Field Touch-Up Procedures for Painted Finishes.

Liquid paints are typically sprayed on commercial architectural aluminum products and include acrylic, polyester and fluoropoly-mer. Both acrylic and polyester finishes can be …

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Transcription of ARCHITECTURAL A inishes - Mid-American Glass

1 InishesARCHITECTURALALUMINUMFCONSIDERYOU ROPTIONS.. PAINTED FINISHES (ORGANIC COATINGS).. 2 Liquid Paint.. 3 Powder Coatings.. 5 Specifications Painted Finishes.. 6 Comparative Performance.. 7 ANODIZED FINISHES.. 8 Production Process.. 9 Class I or Class II Designations..11 Designations for Anodized aluminum Finishes..11 Specifications Anodized Finishes..11 Organic Dyes..11 QUICK GUIDE ..12 CARE CLEANING INSPECTION ..14 General Cleaning Painted and Anodized Finishes .. 16 Painted Finishes Removal of Stains and Mildew ..17 Anodized Finishes Removal of Stains ..17 Removal of Non-Water Soluble Deposits ..18 Protective Coatings..19 Insulating Coatings..20 Rework Procedures for Painted Finishes..20 Field Touch-Up Procedures for Painted Finishes.

2 20 Inspection ..21 Reference Publications ..21 ENVIRONMENTAL CONSIDERATIONS..22 Painted Finishes ..23 Anodized Finishes ..24 WARRANTIES..24 The market for ARCHITECTURAL aluminum products demandsa greater variety of finish types and colors than ever many reasons include: the competitive need to distinguish buildings aesthetic and design requirements new technology that results in higher performanceand durability owner demands for cost effectiveness the need to protect the building owner's investmentagainst the elements, pedestrian traffic andenvironmental contaminants public awareness of environmental concerns the increase in consumer sophistication andawareness of finish types and colorsToday's paint and powder finish types and colors challenge theanodizing processes that have dominated the architecturalaluminum industry for many years.

3 This brochure is designedto assist you in your choice of ARCHITECTURAL aluminum finishesby presenting and reviewing the various types and explainingways to maintain them for the longest possible .. That Enhance, Protect and Endure12 PaintedLiquid paints are typically sprayed on commercial architecturalaluminum products and include acrylic, polyester and fluoropoly-mer. Both acrylic and polyester finishes can be modified withsilicone to enhance coatings generally contain between 50 and70 percent by weight fluoropolymer resin called polyvinylidenefluoride or PVDF. Two companies manufacture the majority ofPVDF used in the United States: Elf Atochem North America,Inc., and Ausimont USA, Inc., who manufacture KYNAR 500 and HYLAR 5000 , respectively.

4 These resin manufacturersallow paint manufacturers to use the Kynar 500 and Hylar 5000brand names only if they incorporate a minimum of 70 percentby volume weight into the paint system. Pigment is then addedto provide color. Liquid Paint3 Market demand for a variety of colors and types hasresulted in increased use of painted finishes also known asorganic coatings. Although anodizing remains the most fre-quently specified finish for ARCHITECTURAL aluminum , substantialimprovements in paint technology provide long-term performanceand durability in a wide range of climates and comparison chart representing different types of organiccoatings and their performance characteristics is included onpage 13 for reference.

5 Finishes (Organic Coatings)(Far left) Bone White Painted Finish Center for Environmental Sciences and Technology Management (CESTM), State University ofNew York (SUNY) at Albany, New YorkArchitect: Cannon & Associates, Grand Island, New York(Left) Reciprocating paint spray gunPerformanceKawneer's 50 per-cent fluoropolymerpaint systems meetthe AAMA 2604 paintspecification for highperformance while the70 percent fluoropoly-mer finishes also meetthe superior perform-ance of the AAMA2605 specification(seepages 6-7). Bothpaint systems providelow gloss color withhigh performance anddurability. For thisreason, Kawneer andother high qualityarchitectural aluminumproduct manufacturersrecommend the use offluoropolymer fluoropoly-mer finishes are baked,the resin particles,which look like balls ofspaghetti, melt, uncoiland intermingle.

6 Uponleaving the bake oven,the painted material isstill "wet." Once cool,it forms a continuous,physically locked finish. Fluoropolymerpaints are extremelydurable because thePVDF resin is essen-tially chemically must beadded to give the fluo-ropolymer the requiredadhesion properties. Aformulation based on70 percent fluoropoly-mer resin has beenfound to give the opti-mum mixture for properadhesion characteristicsand "metallic"flake fluoropolymerfinishes add increasedperformance cost of fluo-ropolymer paints willvary depending uponthe color colors pro-vided by most manu-facturers will generallybe considerably lessexpensive than customcolors. Typically, fluo-ropolymer paint systemsrequire a primer andsome utilize as manyas three or four coats,including barrier andclear coats.

7 Ideal applicationsfor fluoropolymer coat-ings include entrances,storefronts, windowsand curtain with specialhigh performance anddurability needs suchas monumental projectswith severe exposureto the sun's UV raysare ideal candidatesfor fluoropolymer fin-ishes. For high trafficareas, textured metallicfinishes and fluoropoly-mer coatings withgreater pencil hardnessprovide increasedabrasion resistanceand toughness. (For more specificperformance informa-tion, see our separateFluropon , Permadize and Acroflur colorcards)ApplicationTo apply fluoropoly-mer finishes during themanufacturing process,at least six steps arenecessary (see diagrambelow). First, a multi-stage chemical pre-treatment produces asurface with a chemicalconversion coating tocleanthe metal, pro-mote primer adhesionand provide corrosionresistance.

8 Second, thealuminum is coatedwith an acrylic or epoxyprimeraccording tothe paintmanufactur-er's instruc-tions. Theseprimers adhere tothe pretreated surfaceand intermingle withthe fluoropolymer top-coat during the bakingprocess. A flashstepfollows to evaporatethe solvents, then thefluoropolymerfinishissprayed on to the alu-minum. Another flashprocedure is followedbybakingfor approx-imately 10 minutesuntil the aluminumsurface reaches atemperature of 450 clear fluo-ropolymer topcoat,flashandbakestepsare clear topcoatmay be necessary whenthe material is paintedwith certain "metallic"flake fluoropolymercoatings. The cleartopcoat seals in themetallic flakes andprevents them fromcorroding. Kawneeralso recommends aclear topcoat applica-tion for storefrontframing and entranceareas where the finishmay be physicallyabused by pedestriantraffic or where exoticpigments are used.

9 Itis important to notethat there may be aslight color differencewhen applying clearcoat to light coloredpigments such asBone Primer Flash Finish Flash Bake(Optional)Topcoat Flash Bake4 Sometimesknown as "drypaint," PowderCoatings aresolvent free andemit no volatileorganic chemicals(VOCs) into the environ-mentally friendly "green"powder paint systemsrequire less energy toapply and reducewaste in applicationas overspray can bereclaimed and reused. Like liquid paintsystems, powder paintsystems are appliedelectrostatically to themetal substrate. Powderpaints may incorporateTGIC (triglycidyl iso-cyanurate), polyester,acrylic, fluo-ropolymer orepoxy foraddi-tionalperfor-mance anddurability.

10 Powder CoatingsPerformanceThere are newpolymer systemsthat allow somepowder coatings tomeet the performancerequirements of theAAMA 2604 specifica-tion. Many alsocomply with mostenvironmental regula-tions imposed by gov-ernments recognizingthe need to preservenatural resources byimposing stricter safetyand emission regula-tions. Powder coatingsprovide the solution toenvironmental concernswhile offering highperformance, durabilityand a widevariety coatingsdemonstrate very goodcolor retention and pro-vide optimal corrosionresistance. Excellentdurability, mechanicalproperties and abrasionresistance make thesecoatings ideal for hightraffic entrances andstorefront offeringsmay be available in avariety of glosslevels.


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