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THE CHEMISTRY BEHIND THE SOLUTION: HOW KALTHARZ 8500 REDEFINES BINDER SYSTEMS.
For decades, classic furan resins have been the standard in no-bake binder systems, providing the strength and curing
speed that foundries depend on. However, as the industry evolves and demands greater sustainability, safety, and
efficiency, new solutions are needed. The emergence of hybrid binder systems offers precisely that — a smarter,
cleaner way to achieve the performance foundries require..
The Concept of Hybrid Systems.
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Limitations of Classic Systems.
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The Hybrid Innovation: PRFuran (Hybrid FR/PR).
Hybrid systems overcome this challenge through modification with a special FA-phenolic polymer.
Known as Hybrid FR/PR or PRFuran, this advanced binder structure changes the game. Instead of relying
on strong acids to drive curing, much of the curing power is now transferred directly into the resin.
The impact is significant. Strong acids are no longer mandatory, emissions are reduced, and curing becomes
more controlled. Yet, performance is not sacrificed. Hybrid formulations are designed to achieve curing results
comparable to classic furan resins containing 85–90% furfuryl alcohol (FA) where necessary.
Why Mixing Doesn’t Work.
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Chemistry That Works Smarter.
The shift from classic to hybrid binder systems represents more than an incremental change — it is a
redefinition of how binders are designed and used. By embedding curing power directly into the resin,
hybrids like the Kaltharz 8500 Hybrid Binder System deliver the strength of conventional systems with
reduced reliance on acids, lower emissions, and improved workplace safety.
This is the chemistry behind the solution — and it is transforming foundry technology into a cleaner,
smarter, and more sustainable process.
