Neoopren, rọba nke Alpha-polymerization nke chloropnerization (ntụgharị, iguzogide ihe, iguzogide eguzote, na-eguzogide ọgwụ na alkali na ọgwụ mgbochi na-eguzogide.
Rubylene proofylene proofy bụ roba a na-eji etylene na propylene dị ka isi nke molomer dị ka onye isi ala, eylylene proofyonene (EPDLENENENENENENENENENENENENENENENENENENENO ROBEN (EPDMM).