Polybutylene PIB Piping systems;Hot melt adhesives;Compounding and masturbatches lubricants Polybutylene Other names[hide]polybutene-1, poly(1-butene), PB-1IdentifiersCAS number9003-28-5PropertiesMolecular formula(C4H8)nDensity0.95 g/cm3[1]Melting point135 °C[1]Related compoundsRelated compounds1-butene (monomer)Except where noted otherwise, data are given for materials in their standard state ( ...