With our innovative PUROLiT and PUROLiT agil binder systems, we enable extremely low-odor, formaldehyde-free casting processes – with improved technical performance. Reduce emissions, continue to use existing equipment, and increase your sustainability.
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Binders in foundries – innovation from Bindur
What are binders in foundry work?
Binders are key components in mold and core production. They ensure that the sand retains its stability and strength until the liquid metal has been poured in and solidified.
Traditionally, resin systems such as furan or phenolic resins are used—they offer moderate technical properties, but can cause strong emissions and odors.
Challenges of conventional binders
Conventional systems often release volatile organic compounds (VOCs) and BTEX emissions. These substances pollute both the environment and the working conditions in the foundry.
They also require complex extraction and cleaning systems in order to comply with legal limits. This is exactly where Bindur comes in.
Bindur solutions for modern foundries
Our binding agent systems: PUROLiT & PUROLiT agil
With PUROLiT and PUROLiT agile, Bindur offers two low-emission alternatives to conventional resin binders.
Both systems are completely free of aromatics, formaldehyde, furfuryl alcohol, and VOCs—without compromising on curing speed, strength, or regeneration.
PUROLiT – proven, low-emission, for standard processes
PUROLiT agile – fast curing, ideal for automated systems
Technology & Innovation
The innovation lies in the specially developed molecular structure of our binders.
This significantly reduces emissions and improves the strength of the molds and cores.
By avoiding the use of problematic substances, used sand can in some cases even be classified as landfill class 0.
Our systems are compatible with existing equipment—mechanical and thermal regeneration are possible without any problems.
Patented processes
Several patents attest to the innovative strength of our phenol- and formaldehyde-free binders.
This reinforces Bindur’s leading role in the development of sustainable foundry technologies.
Technical characteristics & performance data
Curing, reaction times
Bindur systems enable controlled hardening at any speed.
The high process stability allows for short cycle times and consistent quality, even with complex geometries.
- Significantly reduced VOC and BTEX values
- Low-odor processing
- Improved air quality in production
- Reduced energy consumption for extraction and filtration
Compatibility & Regeneration
Bindur binding agents are fully compatible with existing systems.
Both mechanical and thermal regeneration of the sand can be carried out on the usual scale.
This makes the transition easier—without the need for new investments in equipment.
Areas of application & advantages
Use in mold and core making
PUROLiT and PUROLiT agil are suitable for all common sand casting processes – from hand molding to highly automated plant engineering.
They offer stable results for complex shapes and tight tolerances and enable the best surface qualities.
- Significantly lower emissions
- Less odor nuisance during operation
- Less effort required for extraction and cleaning
- Environmentally friendly and more sustainable
- Compatible with existing machines
- Improved working conditions for employees
Comparison: Bindur vs. Traditional Binding Agents
| Criterion | Conventional Resin Systems (Furan/Phenol) | Bindur PUROLiT / PUROLiT agil |
|---|---|---|
| Emissions (VOC/BTEX) | High | Very low |
| Odor development | Strong | Minimal |
| Formaldehyde / Phenol content | Present | None |
| Regenerability | Limited | Very good |
| Equipment compatibility | Standard | Fully compatible |
| Working environment | Strained | Significantly improved |
| Environmental rating | Medium | Excellent (Landfill Class 0) |
Success stories from practice
Quality tends to improve.
FAQ – Frequently asked questions about Bindur binding agents
What distinguishes Bindur binding agents from conventional resin systems?
Bindur binding agents are completely free of phenol, formaldehyde, and aromatic compounds. They offer the same strength as conventional systems, but produce hardly any emissions.
Can existing systems continue to be used?
Yes. PUROLiT and PUROLiT agil are compatible with existing mold and core manufacturing equipment. Conversion is generally not necessary.
What does “low-emission” mean in relation to binding agents?
“Low-emission” means that hardly any volatile organic compounds (VOCs) are released during processing.
This improves air quality and reduces the energy required for exhaust air systems.
How can the sand be regenerated?
Bindur systems enable mechanical and thermal regeneration with virtually no residue.
This means that in many cases, used sand can be classified as landfill class 0.
What environmental benefits do Bindur binding agents offer?
Lower pollutant emissions, improved working conditions, reduced energy consumption, and lower filter costs.
What is PUROLiT agile?
PUROLiT agile is the advanced version of Purolit with a shorter curing time and higher process stability at slightly elevated temperatures.
Are there technical data sheets?
Yes. The current data sheets can be requested directly via our contact form.
Our experts will be happy to assist you in selecting the right binding agent.
Please use our contact form or request further information without obligation.
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