AMPRO™ 115 has twice the resistance to UV yellowing compared to standard Gurit AMPRO products. AMPRO™ 115 is a suitable to be used for lamination of glass, carbon, aramid and flax fibres. It can also be applied as a top gloss coat to FRP laminates and wooden surfaces. AMPRO™ 115 can also be used for small volume casting and decorative work. AMPRO™ 115 is compatible with all types of foams, polystyrenes, polyurethanes, Gurit PVC, Gurit Kerdyn™ PET and Corecell™ products.
Instructions for use
Application
AMPRO™ 115 is suitable for lamination of fibers and coating of substrates. The product is optimized for use at temperatures between 15 and 25°C. At lower temperatures the product thickens and may become unworkable. At higher temperatures working times will be significantly reduced. Maximum relative humidity for use is 70%. When applying as a coating, small volumes of mixed resin (50-75g) can be left to react and thicken, then applied to the surface of the substrate. This method increases the thickness of resin film that can be applied in one layer. Wet on tacky application is also possible. A polyurethane or similar topcoat can be applied to enhance the UV protection to help further reduce yellowing. Prior to the application of a topcoat the surface of the AMPRO™ 115 should be sanded and cleaned, then follow selected topcoat manufacturer’s instructions. Resin castings of less than 5mm can be made at 15-20°C ambient temperatures, the mixed resin requires degassing prior to pouring. It is not recommended to dilute the resin, hardener or mix system with solvents.
Mixing and handling
Accurate measurement and thorough mixing are essential when using this system, and any deviation from the prescribed mix ratios will seriously degrade the physical properties of the cured system. The resin and hardener must be stirred well for two minutes or more, with particular attention being paid to the sides and bottom of the container. As soon as the material is mixed the reaction begins. This reaction produces heat (exothermic), which will in turn accelerate the reaction. If this mixed material is left in a confined mixing vessel the heat cannot disperse and the reaction will become uncontrollable. It is therefore advised that the material is used immediately or transferred to a shallow wide-bottomed container like a paint tray which will extend the working time. AMPRO™ 115 can be mixed with standard Gurit fillers to make filling / fairing or adhesive compounds as required.
Cure Schedule
Cure at ambient temperature between 15°C – 30°C / 59°F – 86°F. AMPRO™ 115 will cure at ambient temperatures providing adequate properties after 7 to 14 days. An elevated temperature post cure (up to 50°C / 122°F) is recommended to fully stabilize the laminate for maximum properties. A post cure gives increased mechanical properties, particularly a higher heat deflection temperature, increased surface toughness and increased colour stability. An elevated temperature post cure can be applied after an initial 24-hour cure at room temperature. Support the moulded component adequately during the post-cure as the laminate will initially soften slightly as the temperature increases. The optimum cure at elevated temperature depends on temperature and time, e.g. 16 hours at 50°C / 122°F, or longer at lower temperatures.
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