haydrojen naytral rכba (HNBR כ HSN) na di prodakt fכ haydrojenεshכn εn satεrayshכn fכ di kabכn-kabכn dכbl bכnd insay di mכlikul chen fכ naytrayl rכba, so dεn kכl am bak hεli satεrayt naytrayl rכba.

Fluoroelastomer na wan sintetik polimכr εlastכm we gεt fluorine atכm dεm na di kabכn atכm dεm na di men chen כ sayd chen. Di introdɔkshɔn fɔ fluorine atɔm dɛn de gi rɔba fayn fayn ɔt rɛsistɛns, ɔksidɛshɔn rɛsistɛns, ɔyl rɛsistɛns, kɔrɛshɔn rɛsistɛns ɛn atmosfɛrik ol rɛsistɛns, ɛn dɛn de yuz am bɔku bɔku wan na ɛrospɛs, avieshɔn, ɔtomotiv, petrolium ɛn os aplayans dɛn.

Ethylene propylene rubber na sintetik rɔba wit ethylene ɛn propylene as di men monomer, akɔdin to di difrɛn kɔmpɔzishɔn fɔ di monomer na di molecular chain, na binary ethylene propylene rubber(EPM) ɛn tertiary ethylene propylene rubber(EPDM), Dɛn kin yuz am bɔku bɔku wan na ɔtomotiv pat, watapruf matirial fɔ kɔnstrɔkshɔn, waya ɛn kebul sheathing, hos dɛn we nɔ de wam, tep dɛn, motoka sil dɛn, tin dɛn we dɛn kin ad pan lɔbrik ɛn ɔda tin dɛn.

Zink oksayd na inɔrganik tin wit di kemikal fɔmula ZnO, we na ɔksayd fɔ zink. I nɔ de sɔlv insay wata ɛn i nɔ de sɔlv insay asid ɛn strɔng bays. Zink ɔksayd na wan kɔmɔn kemikal aditiv ɛn dɛn kin yuz am bɔku bɔku wan fɔ mek sɛntetik rɔba.