Prepolymers are reactive intermediates used in polymer manufacturing. They remain soluble and meltable, making them ideal for controlled processing. Polyurethanes can be produced through:

One-step method: Direct reaction of a polyol with a polyisocyanate

Two-step method: Formation of a prepolymer followed by chain extension to form the final polymer

Key Applications

Prepolymers are used in the production of:

• Cast polyurethane components
• Rigid and semi-rigid foams
• Flexible polyurethane foams

Common Uses Across Industries

Insulation:

Used in rigid polyurethane foams for thermal insulation in buildings, refrigerators, cold storage units, and refrigerated transport.

Construction:

Applied in insulated panels, pre-insulated pipes, and as a binder in engineered wood products like particleboard and fiberboard.

Refrigeration:

Essential for thermal insulation in household and commercial refrigeration systems.

Automotive:

Used in seating, dashboards, headliners, and as a binder for composite parts.

Coatings, Adhesives, Sealants, and Elastomers (CASE):

Ideal for coatings, adhesives, sealants, and elastomers, offering weather resistance, strength, and durability.

Footwear & Sports Equipment:

Used in the manufacturing of footwear soles, protective gear, and sporting goods.

Binders for waste foam / Rubber Recycling:

Prepolymer-based binders help convert waste foam and rubber into value-added products like orthopedic mattresses and rubber flooring tiles.