Organosiloxane yi dañuy nekk xeetu composé yu kawe-molekur yu am Si{1} ○ ○ {2}Si di lëkkaloo ak grupu organik yuñ takk ci atom silicon yi. Seen formul struktur bu gëna mag mooy :(R. sio {5}m /2). Fii, R dafay màndargaal kuréel yu organik yu melni methyl, phenyl, vinyl, ak "mooy℃ci polymerisation. Ni ko composé polymer yu bari yi, polysiloxane organik yi mën nañu leen xaaj ci ligneer, card{10}chaine, cross{{111}}linked ak yeneen xeetu xeetu liggéey.
Xeetu waajal polysiloxane organik yi mën nañu ko xaaj ñaari kategori yu mag: polycondensation ak ring- ngërëm.Polycondensation reaction chimique la, muy monomer yu am ñaari wala gëna bari ay kuréel yuy liggéey ci seen biir ngir sos ay composé yu kawe {0}y, ci noonu lañuy defaree ay molecule yu ndaw. Ring {- Polimerisasioŋ ubbiku, xeetu reaction polymerisation la, loolu dafay tekki ni amul benn {3}molelemolemoleku bu ndaw ci {4}iproduit yi ñuy génne ci jamonoy reaction. Kon, composition chimique bi ci polymer bi ñuy yokk dafay nuru bu monomer biy tàmbali.