Технические характеристики
Hardener for Epoxy resin L 385
Please order Epoxy resin L 385 separately
General information about the System L 385 + Hardener 385/386:
Epoxy resin L 385 is a new resin system for laminates which is authorised by the Federal Office for Aviation. This resin has variable pot lives and is suitable for processing glass, carbon and aramid fibres.
- Extraordinary good physiological compatibility
- Hardener is not designated as toxic (in comparison to L 285 with the hardener 286 und 287)
- Range of pot lives from 20 minutes (hardener 385) up to 120 minutes (hardener 386)
- Good mechanical and thermal properties
By exploiting the good mechanical properties, this system is suitable for manufacturing components subject to high static and dynamic loads; in particular in the construction of gliders, power gliders and aeroplanes as well as in the boat and ship building industry, the manufacture of sports equipment and model aircraft.
The hardeners 385 and 386 to be used have the same mixing ratios and can be mixed with each other in all ratios so that an appropriate optimal system can be chosen for different applications.
Following curing at room temperature, the resulting manufactured components can be removed from the mould and processed. Even under unfavourable curing conditions like low temperatures (> 20°C) or high humidity, one obtains tack-free, high-gloss surfaces. The viscosity of the mix is adjusted such that a rapid and optimal wetting of the reinforcing fibres are guaranteed and yet bleeding of the resin from weaves on vertical faces is inhibited.
Mixing ratio:
100 : 35 parts by weight of resin L 385 : Hardener 385/Hardener 386
100 : 43 parts by volume of resin L 385 : Hardener 385/Hardener 386
Curing time (20°C): 24 hours
The hardener 385 can be used for many applications - if high thermal resistance or air worthiness is not required - even without subsequent tempering. However, the indicated final properties are attained only after post-curing at temperatures above 50 °C. Hardener 386 should be heat cured in every case.
Advice for storage:
Despite the reduced tendency of our resin systems to crystallise, we recommend storing the containers in a location with low humidity at 15–30 °C. Following removal of materials, the containers have to be carefully sealed in order to avoid the absorption of water, mainly by the hardeners. The aminic hardeners in particular tend to chemically react if exposed to the air, also known as carbamate formation or blushing this can, under certain circumstances, render the material unusable. One recognises this chemical reaction from a white precipitate in the material.
The materials can be kept in their original sealed containers for at least 2 years from the manufacturing date.
The relevant safety instructions for handling epoxy resins and hardening agents as well as our instructions for safe processing have to be followed.
