Ampreg F230-1 Foaming Epoxy System - Gurit

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ExothermAs with all epoxy systems the cross-linking reaction is exothermic, as this system foams, the self insulating effect means that hightemperatures can be expected if large volumes are being cast in confined mouldings.The actual temperature reached will depend on the speed of hardener used, the volume of material being cast, the ambienttemperature, the thermal conductivity of the mould and whether the mould is open or confined. Standard hardener is only reallysuitable for thin and low volume castings up to 30mm thickness due to the heat created.When curing thick sections it is clear that the mixture becomes quite hot in the middle, this has the effect of reducing slightly thedensity of the foam as the cells expand more. This can be up to 15% less depending on the mould geometry.The charts below show some typical temperatures experienced at the centre of castings in various situations.Figure 1: Exotherm at 21°C (Centre of open cast expanding 20mm to 80mm)Figure 2: Exotherm at 35°C (Centre of open cast expanding 20mm to 80mm)Figure 3: Bulk Exotherm (Centre of cast expanding 50mm to 200mm)Temperature (°C)Temperature (°C)Temperature (°C)When curing thick sections it is clear that the mixture becomes quite hot in the middle, this has the effect of reducing slightly thedensity of the foam as the cells expand slightly more. This can be up to 15% less depending on the mould geometry.4 Ampreg F230-1-1-0911
Cured System PropertiesThe table below shows mechanical and thermal properties of the system at a density of 230Kg/m 3 . Samples cured 24 hrs at 21°Cfollowed by 16hrs @ 50°C.Property Standard Hardener Slow Hardener Extra Slow HardenerTg DMTA (Peak Tan d) (°C) 82.9 77.8 81.8Tg2 Ult – DSC (°C) 84.8 77.7 79.5Tg2 – DSC (°C) 66 69 70Tg1 – DMA (°C) 64 66 69Compressive Strength (kPa) TBA 2660 2408Compressive Modulus (MPa) TBA 90 89.9Shear Strength (MPa) TBA 1.49 1.54Shear Modulus (MPa) TBA TBA 36.97Shear Elongation % TBA 16.7 15.4Tensile Strength (MPa) TBA 2.0 2.2Tensile Modulus (GPa) TBA TBA TBAFoamed laminate adhesion(Ampreg21 skins cast wet on wet)TBA 695J/m 2 peel strength TBAAmpreg F230-1-1-0911 5
Page 1: Provisional datasheetAmpreg F230-1F
Page 6 and 7: Health and SafetyThe following poin

Ampreg F230-1 Foaming Epoxy System - Gurit

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