The Phenolic Urethane Cold Box (PUCB) process utilizes an amine gas to catalyze the reaction between a phenolic resin and an isocyanate to produce a urethane bond. IVAREZ 308 is a phenolic resin that is used in conjunction with an MDI-type isocyanate, such as IVAREZ 608. Typically, both the Part 1 and Part 2 resin components are mixed with suitable sand. The resulting sand mix is then blown into a core box and is subsequently cross linked by passage of a vaporized tertiary amine catalyst to produce a urethane bond. Curing takes place at the same rate throughout.
The cold box process is mainly used in casting of cores for automotive castings due to its excellent dimensional accuracy. Cores for iron castings can be made. They are suited for high productivity as well as for large cores which require rapid strength increase.

Features:
• High Productivity - Large volume high speed production
• No tooling heat required, Cures at room temperature
• Cost effective to run in comparison to heat cured systems
• Low labor and energy cost
• Good dimensional accuracy, very good flow ability of sand mix
• Cores can be handled immediately
• Cores can be cast as early as possible.
• Long resin shelf life