is produced by esterifying Butanol and Phthalic Anhydride.DBP has excellent compatibility with PVC and has high plasticizing efficiency.A considerable low dosage is enough to reach satisfactory flexibility. It is a primary plasticizer for general purpose and often used as gelation agent.Its defect is higher volatility which would causes great loss during compounding. Its aging resistance,cold resistance,electric resistivity, and durability are inferior.It is easy to migrate and embrittle in low temperature, its solvent extractability is
high.