Our bio-based polymer technologies

Our bio-based polymer technologies

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Our latest innovation is a portfolio of bio-based polyol and polymer technologies. To turn the tide on global exhaustion of resources, we are creating high-performing resins based on non-limited raw materials. This way, we aim to reduce the environmental footprint with responsible production and products. This is vital, as the ecosystem has been brought to a breaking point where striving for circularity is the only logical step.  


Raw materials as the basis of sustainable chemistry

The raw materials we use are key as our global consumption is now exceeding the earth can reproduce and our emission of carbon dioxide can no longer be absorbed. It is time for a change and that is why Stahl Polymers, as part of the overall Stahl effort, is committed to sustainable chemistry as is underlined by our bio-based portfolio. From biomass, generated from renewable sources, like rapeseed oil, wheat, waste, algae and soy, we create biopolymers for our water-based binders and coatings.



Bio-based polymers without compromise on performance

To change towards a circular industry, we need to work together and rethink, redesign and rewire polymeric technologies. That means stepping out of our comfort zone, look for partnerships and cooperate because to change the world, we need to work together and rethink, redesign and rewire how we operate. This is an ongoing trajectory of innovation, starting from solvent-borne coatings to water-based, label-free and now bio-based resins that offer the same performance while using more responsible raw materials.


Stahl Polymers timeline




Bio-based resins, polyols and binders product overview

We offer a variety of bio-based polyols and resin technologies, which provide the desired performance qualities with a lower environmental footprint. This enables coating and paint manufactures to add the best properties to coatings, without compromise on sustainability. 


Relca® Bio Polyols

Product Renewable Carbon calculated OH (mgKOH/g) Functionality Mw calculated (g/mol) Viscosity @40ºC (mPa·s) Tm (°C)
Relca® Bio PO-1056 61% 56 2 1,970 1,297 14
Relca® Bio PO-1120 56% 120 2 935 436 7



Relca® and Picassian® binders

Product Solids (%)     Renewable content (%)  Solvent-free Type MFFT (ºC) UTS (MPa) Elongation (%)    

Mod 100 (MPa)

Features, benefits and uses
Picassian® BI-001 12.0 92 Yes Protein - - - - Improves early and final block resistance.
Relca® HY-479 36.0 33 Yes PES < 5 15 180 12 High gloss decorative coatings.
Relca® Bio PD-814 27.0 34 Yes PES/PE
< 5
- - - Soft touch with matt effect.
Relca® Bio PU-697* 45.0 44 No PES < 5 38 877 2 Soft, good for impregnation.
Relca® Bio PU-698* 40.0 42 Yes PES/PE < 5 36 551 8 Medium hard.

Relca® PU-476

36.0 42 Yes PES 40 - - - Excellent chemical resistances in 1K wood coatings.

*) Based on Relca® Bio Polyols


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Our bio-based polymer technologies
Raymond Bakker
Global Business Director Polymers