Polyester polyols are fundamental components in the production of the polyurethane family and play a decisive role in determining the final product properties — from foams and coatings to elastomers and adhesives. Rasam Polymer Nami, leveraging its extensive experience and high production capacity, manufactures a wide range of saturated and unsaturated polyols to meet the demands of both domestic and export markets.
Saturated vs. Unsaturated Polyester Polyols The Differences at a Glance
Saturated Polyester Polyol:
Its molecular structure lacks double bonds, resulting in better chemical and thermal stability, higher resistance to oxidation and UV light, and lower reactivity toward unwanted side reactions. It is ideal for products that require durability, long-term stability, and chemical resistance.
Unsaturated Polyester Polyol:
Contains double bonds within the polymer chain, enabling additional reactions (such as crosslinking during curing). This property makes it suitable for manufacturing coatings, molding resins, and composites, where high hardness and strong adhesion are essential.
Key Properties and Important Technical Parameters
Some technical specifications that buyers pay attention to:
Hydroxyl Number (OH number): Indicates the amount of active hydroxyl groups.
Average Molecular Weight: Directly affects viscosity and final mechanical properties.
Acid Number: Important for stability and reaction with isocyanates.
Viscosity and Pour Point: Crucial for processability and mixing in industrial systems.
Rasam Polymer Nami produces its products in various customizable ranges to ensure compatibility with diverse formulations.
Practical Applications
Soft, Semi-Rigid, and Rigid Foams: Furniture, mattresses, sound and thermal insulation.
Elastomers and Molded Parts: Industrial components with specific mechanical properties.
Coatings and Protective Finishes: Industrial coatings resistant to corrosion and environmental conditions.
Adhesives and Sealants: Used in automotive, construction, and home appliance industries.
Composites and Molding Resins (for Unsaturated Polyols): For industries requiring high hardness and surface resistance.
Why Rasam Polymer Nami?
Offering Both Saturated and Unsaturated Polyols: Available in a variety of technical specifications.
Customizable Formulations: Capability to produce based on customer requirements (OH number, molecular weight, viscosity, etc.).
Strict Quality Control: Incoming material testing, production-stage monitoring, and final product testing to ensure consistency.
Technical Support: A dedicated team assists with co-formulation for industrial clients, process optimization, and formulation design recommendations.
Industrial Collaboration and Logistics: Timely supply and versatile packaging solutions suitable for manufacturers and distributors.
Note: For detailed technical specifications (grades, datasheets, minimum order quantities, packaging, and pricing), Rasam’s sales team can provide the necessary datasheets and samples.
Tips for Choosing Between Saturated and Unsaturated Polyols
If stability and chemical/UV resistance are a priority for your product → Saturated polyol is more suitable.
If you need crosslinking capability and increased hardness after curing (e.g., in resins and composites) → Unsaturated polyol is the better choice.
In many applications, a smart combination of both types or surface modification can provide the best properties — Rasam provides formulation consultation to guide you through this.