Polyurethanes are typically produced via a between two primary components:
Used in seating for comfort, bumpers for impact resistance, and coatings for corrosion protection and aesthetics. Polyurethane
Rigid foams serve as high-performance thermal insulation for roofs and walls, significantly reducing energy consumption. Polyurethanes are typically produced via a between two
Long, flexible polyol chains that provide elasticity and low-temperature flexibility. This reaction is often facilitated by catalysts, such
This reaction is often facilitated by catalysts, such as or organometallic compounds (e.g., dibutyltin dilaurate). To create a solid foam, a "blowing agent" is added; commonly, water reacts with isocyanate to produce CO2CO sub 2 gas, which expands the polymer into a cellular structure. 2. Structure-Property Relationships
R−NCO+R′−OH→R−NH−CO−O−R′cap R minus NCO plus cap R prime minus OH right arrow cap R minus NH minus CO minus O minus cap R prime
Flexible foams provide the primary cushioning for mattresses and upholstered furniture.