POLYURETHANE FOAM SYSTEM

摘要

Polyol compositions are provided which comprise a first polyol which is an oxyalkylated Mannich reaction product of a phenol, an aldehyde and an alkanol amine, having a hydroxyl number of 350 to 650; a second polyol which is an oxyalkylated polyamine having a hydroxyl number of 600 to 800; and a third polyol which is an oxyalkylated pentaerythritol having a hydroxyl number of 350 to 650. Polyurethane foams formed by reacting these polyol compositions with an isocyanate exhibit good foamsubstrate adhesion and good foam surface properties. These polyol compositions perform especially well in spray applications and are ideally suited for use in cold weather.