Bio Polyols are renewable polyurethane raw materials derived from natural castor oil. These solvent-free, bio-based PU polyols are widely used in two-component polyurethane systems for industrial coatings, floorings, pipeline coatings, adhesives, sealants and electrical casting applications.
Chemex Chemicals supplies high-performance castor oil based polyols engineered for durability, chemical resistance and excellent mechanical strength in demanding industrial environments.
What Are Castor Oil Based Polyols?
Castor oil based polyols are branched polyether-polyester polyols derived from ricinoleic acid. Due to their natural hydroxyl functionality, they are highly reactive with MDI and HDI isocyanates to form durable polyurethane coatings.
These bio-based polyols are:
- 100% solid and solvent-free
- Renewable and environmentally responsible
- Chemically resistant
- Suitable for hard or flexible PU systems
Why Choose Bio-Based PU Polyols?
Compared to conventional petrochemical polyols, bio polyols offer:
- Reduced VOC content
- Improved sustainability profile
- Excellent water & acid resistance
- High abrasion resistance
- Strong adhesion to concrete and steel
- Balanced hardness and flexibility
Industries increasingly prefer bio-based polyurethane raw materials due to environmental regulations and performance advantages.
Key Industrial Applications
Our castor oil based PU polyols are widely used in:
- Water, Oil & Gas Pipeline Coatings
- Industrial PU Floor Coatings
- Concrete & Steel Protective Coatings
- Synthetic Resin Mortars
- Electrical Potting & Casting Compounds
- Chemical Resistant Sealants
- Heavy Duty Industrial Adhesives
Technical Advantages of Castor Oil Based Polyols
Castor oil derived polyols provide inherent hydroxyl functionality due to the presence of ricinoleic acid. This allows efficient crosslinking with aromatic and aliphatic isocyanates, producing polyurethane coatings with excellent hardness development, superior chemical resistance and long-term durability.
Due to their solvent-free nature, these polyols help reduce VOC emissions while maintaining high solid content formulations for heavy-duty industrial applications.
Technical Compatibility
Chemex Bio Polyols are compatible with:
- MDI (Methylene Diphenyl Diisocyanate)
- HDI (Hexamethylene Diisocyanate)
- Aromatic and Aliphatic Isocyanate Hardeners
They can be formulated into:
- 2K Polyurethane Coatings
- High-build industrial coatings
- Elastic PU membranes
- Tough-elastic sealing systems
Why Buy From Chemex Chemicals?
- Reliable industrial supplier in India
- Consistent quality material
- Technical support for formulation
- Bulk supply in drums and IBCs
- Competitive pricing
FAQ
What is a bio polyol?
A bio polyol is a renewable polyurethane raw material derived from natural oils such as castor oil. It reacts with isocyanates to form polyurethane coatings, adhesives and sealants.
What is the difference between 240 EW and 350 EW castor polyol?
240 equivalent weight polyols produce harder, more abrasion-resistant PU systems.
350 equivalent weight polyols provide more flexibility and elasticity in coatings and sealants.
Are castor oil based polyols solvent free?
Yes. they are 100% solid and solvent-free, making them suitable for low-VOC industrial formulations.
Where are bio-based PU polyols used?
They are widely used in:
- Pipeline protective coatings
- PU industrial floor coatings
- Concrete coatings
- Steel protection systems
- Electrical casting compounds
Are bio polyols compatible with MDI and HDI?
Yes. Castor oil based polyols are compatible with both aromatic (MDI) and aliphatic (HDI) isocyanates in two-component polyurethane systems.