DescriptionFlexibond 8204S/Flexibond 8204W is a two-component polyurethane adhesive which is widely applied to manufacture heat-insulation and decoration integrated plate, truck van panel,refrigerated carriage board,ceiling board and metal partition of clean rooms. It is suitable for various substrates, such as galvanized sheets, calcium silicate board, glass magnesium board, rook wool, PU foam, expanded polystyrene foam board, extruded polystyrene foam board, phenolic board, etc. The volume of adhesive will be expanded during the curing process. Advantages FLEXIBOND 8204S / FLEXIBOND 8200(1) Excellent adhesion to various substrates.(2) Cures fast, shortens heat or cold setting time.(3) Foam percentage 50-100%, benefits to fill cracks between the substrates.(4) Solvent free, environmental friendly.(5) Good humidity and heat resistance. FLEXIBOND 8204W / FLEXIBOND 8200(1) Low viscosity,Cure fast,Very suitable for winter use.(2)Excellent adhesion to various substrates.(3)Cures fast, shortens heat or cold setting time.(4) Foam percentage 50-100%,benefits to fill cracks between the substrates.(5) Solvent free, environmental friendly.(6) Good humidity and heat resistance. Technical Data SheetFlexibond8204S/Flexibond8200Component A(Resin)Component B(Hardener)Curing mechanismPoly additionChemical baseMultiplehydroxyl compoundPAPIColorWhiteBrownThe color after mixingLight yellowDensity (before curing)1.5g/ cm 31.2g/ cm 3Viscosity25000-30000mPa.s (Brookfield - RVT 6/20) 200-300mpa.s(Brookfield - RVT 2/50)Viscosity (after mixing)6000-10000mpa.s (Brookfield-RVT 6/20)Mixing ratio (by weight)10025Pot life (23ºC)50-80minsOpen time (23ºC, 50%RH)80-90minsHardness shore D (GB/T 531-2008)Approx 65Shear strength (GB/T 7124-2008)≥6Mpa (Aluminum alloy)Shelf life (unopened below 25ºC)12 months6 months*Testing temperature 23ºC and 50% r.h. Flexibond8204W/Flexibond8200Component A(Resin)Component B(Hardener)Curing mechanismPoly additionChemical baseMultiplehydroxyl compoundPAPIColorWhiteBrownThe color after mixingLight yellowDensity (before curing)1.5g/ cm 31.2g/ cm 3Viscosity6000-10000mpa.s (Brookfield - RVT 6/20)200-300mpa.s (Brookfield - RVT 2/50)Viscosity (after mixing)3000-6000mpa.s (Brookfield-RVT 6/20)Mixing ratio (by weight)10025Pot life (23ºC)15-30minsOpen time (23ºC, 50%RH)25-40minsHardness shore D (GB/T 531-2008)Approx 65Shear strength (GB/T 7124-2008)≥6Mpa (Aluminum alloy)Shelf life (unopened below 25ºC)12 months6 months*Testing temperature 23ºC and 50% r.h.ApplicationScope of application Bonding Substrate Application Note(1)Preparation:Prepare a clean and dry drum for mixing the adhesive.Mixing tool: Sticks for manual mixing or electric mixer.Electronic scale: It would be better if the electronic scale can accurately weight to one decimal.(2)Substrates Surface Treatment:The substrates should be clean and dry and of no grease, dust, or other contaminations. The substrates can be cleaned by alcohol or acetone. If the metal surface is coated with primer, or the surface is polished, the adhesion can be improved significantly.(3)Flexibond 8204/Flexibond 8200=4: 1The resin (8204) should be uniformly stirred before it is mixed with the hardener (8200). Mix the two components uniformly. Mix for 1-2 more minutes after the two components color is well mixed. Use up the mixer as soon as possible before its pot life, or less frequent principle can be taken.(4)Adhesive Coating:The adhesive can be coated with spreading machine, rollers or serrated scrapers manually. The adhesive should be coated uniformly on the substrate surface. The recommended dosage is 200-400G/M2. The dosage varies with the roughness of the substrate surface.The adhesive should be coated within its pot life.(5)Pressing:Substrates have been coated with adhesive should be pressed within open time, or the adhesion strength will be affected. Raise the compounding pressure as high as possible without affecting the material forming.(6)Pressing timeThe curing speed and the time to form adhesion vary with the temperature. The curing speed is slower and it takes longer time for pressing as the temperature is lower; The curing speed is faster and it takes shorter time for pressing as the temperature is higher. The pressing time is 4 hours under 23.(7) Working ConditionRecommended working condition: Temperature 5-30, relative humidity
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