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Huntsman Polyurethanes' resin system for pultrusion is a two-component system based on RIMLINE polyol and SUPRASEC MDI isocyanate, offering excellent wetting characteristics, accelerated line speeds, low pull forces and minimal VOC emissions. The resin system is well suited for structural profiles in demanding applications where superior strength and durability is a requirement.

Typical applications:

• Sporting goods
• Window lineals
• Architectural moldings
• Flat springs
• Lightweight structural supports
• Stabilizer bars
• Transportation panels

Properties:

• Superior strength
• Durability
• Impact resistance
• Heat distortion
• Damage resistance

The toughness, damage tolerance and strength of polyurethane resins bring potential to simplify and reduce the cost of the reinforcement layup in pultrusion profiles by replacing mat with rovings. Further, converting mat to rovings in the design will increase profile stiffness and liberate the potential to reduce the overall composite geometry.

Depending on design intent, structural components may be fabricated to take advantage of either the higher stiffness at constant cross-section or lower weight and cost with reduced wall thickness. This design latitude will aid the pultruder and end-user in remaining cost competitive, differentiating their product offering and growing into new market opportunities.