... (C4H8)nDensity0.95 g/cm3[1]Melting point135 °C[1]Related compoundsRelated compounds1-butene (monomer)Except where ... given for materials in their standard state (at 25 °C, 100 kPa)Infobox referencesPolybutylene (polybutene-1, poly(1- ... polypropylene, heat sealing temperatures as low as 65 °C can be achieved, maintaining a broad sealing window ... of polybutylene in chlorinated water.[12] Polybutylene 1300