I-HP550J inelayisensi yiLyondell Basell'Itekhnoloji yeSpheripol. Ipropylene yempahla eluhlaza iveliswa ngenkqubo yePDH, kwaye umxholo wesulfure wepropylene monomer uphantsi kakhulu. Imveliso ineempawu zamandla aphezulu, ukuqina okuphezulu, i-ductility enhle, ukucutshungulwa lula, iphunga eliphantsi kunye nokunye.