Stepan® specializes in providing polyester polyols for the polyurethane adhesive market while offering superb polyester technical support. Stepan® offers a broad range of aliphatic and aromatic polyesters including many prepolymer grade products. Stepan® is dedicated to innovation in the polyurethane adhesive market with the continuous addition of new products
Reactive Hot Melt Adhesives (PURHM)
Applications: Automotive, aerospace, wood, sandwich panels, cardboard and book binding.
Key Features: fantastic high adhesion values, high degrees of temperature resistance, high flexibility and resistance against moisture and solvent.
If you are looking to work outside of the maximum service temperature (60–80 °C) of Ethylene-vinyl acetate (EVA) or are wanting to reduce the level of tackifiers and waxes in your system, formulating a Hot Melt Polyurethane would be a good place to start. It will offer a fast setting, tough yet flexible bond (even on difficult substrates). While providing excellent resistance to solvents and chemicals even at low application temperatures, making it suitable for heat-sensitive substrates.
Stepan® offer both the Crystalline Polyol (base of the formulation) providing a short open time, low melt viscosity and high initial strength and both Liquid and Solid Amorphous polyol (used to adjust properties), enabling an increase of open time, lower melt viscosity, increased flexibility and improved adhesion, enabling total control in your formulations performance.
- Crystalline Polyol
STEPANPOL® PC-205-S-30 – a NEW grade providing Standard properties with enhanced stability
STEPANPOL® PC-207-P-30 – Premium properties
- Liquid Amorphous Polyol
Stepan® also has grades suitable for Thermoplastic Polyurethane (TPU) technology, developed for Footwear, Textiles, Automotive Upholstery, Leather Accessory applications.
- Crystalline Polyol
- Liquid Amorphous Polyol
STEPANPOL® DPR 4960-P-205 NEW Developmental grade ready for sampling
Flexible packaging adhesives (flexpack or lamination adhesive)
Applications: Flexible laminates for packaging applications (flexpack) are multi layer materials of paper, plastics films and metal foils.
Stepan® only supply ‘solvent free’ and solvent borne Polyester polyols that are designed for high performance applications. Providing superior adhesion to aluminum and polymer foils, while also delivering high temperature resistance and mechanical strength. Polyester polyols show good adhesion to difficult substrates where Polyethers fail.
STEPANPOL® BC-180 – a NEW grade providing Green technology (High Bio content) with good hydrolysis resistance
STEPANPOL® PDP-70 – Low viscosity with good flexibility that works well in conjunction with Polyether technology.
Applications: Construction, Engineering, Load Bearing, Chemical Anchoring, Flooring, Marine, Decking.
Using a polyester will enable your formulation to have tremendous high adhesion values, high degrees of temperature resistance, high flexibility and resistance against moisture and solvent. While being able to avoid the Brittle failure mechanisms experienced with Epoxy systems.
STEPANPOL® PC-5130-160 – Standard properties
STEPANPOL® BC-180 - a NEW grade providing Green technology (High Bio content), flexible with good hydrolysis resistance
STEPANPOL® T-327 – Premium properties, to allow for Good adhesion to low surface energy substrates
Stepan® also has a good range of polyester polyols suitable for 1K Water based Polyurethane Dispersion (PUD) adhesives. Developed for Automotive, furniture and wood, textiles, Inks and packaging adhesives applications. Stepan are well established up to create bespoke polyesters to match your end requirements along with providing a range that will match to your existing polyester.
Stepan® has a strong portfolio in foam applications, STEPANPOL® PC-5190-190 is ideal for use in Reactive 1K aerosols (OCF), Low viscosity with Low reactivity that works well in conjunction with Polyether technology. Enables STEPANPOL® PC-5190-190 to provide thermal and acoustic insulation and render joints airtight, while still allowing water vapour to migrate, ideal for window & door installations.
For Reactive 2K Spray Foam, (used in Roof, Loft and Wall installation) Stepan have 3 key grades that would be a starting point for any reformulation.
STEPANPOL® T-401 – Open cell foam
STEPANPOL® T-327 – Closed cell foam
STEPANPOL® PS-3152 - Increased insulation properties
STEPANPOL® T-327 is also suitable for Pour-in-Place Foams, ideal for creating a casted shape, commonly used in stage props in the film industry or for garden decorations (eg boulders).