Ua laikini ʻia ʻo HP550J e Lyondell Basell's ʻenehana Spheripol. Hoʻopuka ʻia ka propylene waiwai ma o ke kaʻina PDH, a he haʻahaʻa loa ka sulfur maʻiʻo o propylene monomer. Loaʻa i ka huahana nā hiʻohiʻona o ka ikaika kiʻekiʻe, rigidity kiʻekiʻe, ductility maikaʻi, hana maʻalahi, haʻahaʻa haʻahaʻa a pēlā aku.