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processing notes for Biothan - Biodur casting resin systems consider processing temperatures, lower temperatures extend, higher temperatures shorten the working time. Other amine-group containing resins like Epoxy or PU systemsin the atmosphere can have influence on the potlife. humidity should be avoided during processing. after longer storage resin and hardener should be stirred . Always add the resin in the proper proportion to the hardener. Mix evenly approx. 30 seconds, more ideally, fill over the mix into a 2nd container and mix briefly again. to avoid air entrapment the mixture must be vacumed throughouly, pouring under vacuum is also possible. lock containers after use and protect against humidity. consider processing and deform times from the form of the respective casting system. Castings with small wall thicknesses and some of the the transparent versions should be tempered by 80�C for approx. 1-2h. With the RS and RSS types (fast curing resins) this tempering isn�t necessary! A preliminary heating of the casting form to 45 oC is possible, this shortens the releasing times (execute preliminary tests, also regarding dimensional accuracy). Attention when using casting forms already used (epoxy -, Pu-castings, etc..), unwanted reactions with residual substances can occure, which can negatively influence the casting result ! When using silicone rubber as casting form, volatile constituents of the silicone rubber may cause unwanted reactions, which can impair in particular the surface quality of the castings! |
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