- D4 (Octamethylcyclotetrasiloxane) D4

- I-D5 (i-Decamethylcyclopentasiloxane) i-D5

- D6 (Dodecamethylcyclohexasiloxane) D6

Uthintelo lwe-D4 kunye ne-D5 kwiiMveliso zokuKhathalela umntu:

I-Octamethylcyclotetrasiloxane (D4kunye ne-decamethylcyclopentasiloxane (D5) zongezwe kwiFIKA kuluhlu lwezinto ezithintelweyo kwisihlomelo XVII(ungeno 70) nguUMGAQO WEKOMISHINI (EU) 2018/35kwi10 Jan 2018. I-D4 kunye ne-D5 aziyi kubekwa emarikeni kwiimveliso zokuthambisa ezihlanjwayo kugxininiso olulingana okanye olukhulu kunoko.0.1%ngobunzima bayo nayiphi na into, emvaNge-31 kaJanuwari 2020.

Kutheni i-D4 kunye ne-D5 zithintelwe?

I-D4 kunye ne-D5 zii-cyclosiloxanes ikakhulu ezisetyenziswa njenge-monomers kwimveliso ye-silicone polymer. Kananjalo banosetyenziso oluthe ngqo kwiimveliso zokhathalelo lomntu. I-D4 ichongwe njenge-aezingisayo, bioaccumulative kunye netyhefu (PBT) kwaye ezingisa kakhulu bioaccumulative (vPvB) into. I-D5 ichongwe njengesixhobo se-vPvB.

Ngenxa yenkxalabo yokuba i-D4 kunye ne-D5 inokuba namandla okuqokelela kwindalo kwaye ibangele iziphumo ezingalindelekanga kwaye ezingenakuguqulwa kwixesha elide, i-ECHA's Risk Assessment (RAC) kunye ne-Socio Economic.IiKomiti zoVavanyo (SEAC) zivumelene nesindululo sase-UK sokunqanda i-D4 kunye ne-D5 kwiimveliso zokhathalelo lomntu ezihlanjwayo ngoJuni ka-2016 njengoko zinokuhla ngomjelo kwaye zingene emachibini, emilanjeni, nakwiilwandlekazi.

Usetyenziso oluThintelweyo lwe-D4 kunye ne-D5 kwezinye iiMveliso?

Ukuza kuthi ga ngoku i-D4 kunye ne-D5 azithintelwanga kwezinye iimveliso. I-ECHA isebenza kwisiphakamiso esongezelelweyo sokukhawulela i-D4 kunye ne-D5 ngaphakathishiya kwiimveliso zokhathalelo lomntukunye nezinyeabathengi/iimveliso zobuchwephesha(umzekelo, ukucoca, iiwax kunye neepolisheli, ukuhlamba kunye neemveliso zokucoca). Isiphakamiso siya kungeniswa ukuze sivunyweEpreli 2018. Imizi-mveliso ivakalise ukuchasa okumandla kulo mqobo wongezelelekileyo.

KwiMatshi 2018, I-ECHA iphinde iphakamise ukongeza i-D4 kunye ne-D5 kuluhlu lwe-SVHC.

Isalathiso:

• UMGAQO WEKOMISHINI (EU) 2018/35
• IKomiti yoVavanyo loMngcipheko (RAC) Yamkele iSindululo sokuThintela ukusetyenziswa kwe-D4 kunye ne-D5
• Ukuhlamba-off Izithambiso
• Iinjongo zokuthintelwa kwe-D4 kunye ne-D5 kwezinye iiMveliso
• I-Slicones Europe - Izithintelo ezongezelelweyo ze-REACH ze-D4 kunye ne-D5 ziphambi kwexesha kwaye azithetheleleki - ngoJuni 2017

Ziziphi ii-silicones?

Ii-Silicone ziimveliso ezikhethekileyo ezisetyenziswa kumakhulu ezicelo apho kufuneka ukusebenza kwazo okukhethekileyo. Zisetyenziswa njengezinto zokuncamathelisa, ziyayigquma, kwaye zinobuchule obugqwesileyo bomatshini/i-optical/thermal resistance phakathi kwezinye iipropathi ezininzi. Ziyasetyenziswa, umzekelo, kubuchwephesha bezonyango, ukuvuselelwa kwamandla kunye nezisombululo zokugcina amandla, kunye nobuchwepheshe bedijithali, ukwakhiwa kunye nokuthutha.

Yintoni i-D4, i-D5 kunye ne-D6 kwaye isetyenziswa phi?

I-Octamethylcyclotetrasiloxane (D4), i-Decamethylcyclopentasiloxane (D5) kunye ne-Dodecamethylcyclohexasiloxane (D6) isetyenziselwa ukudala uluhlu oluhlukeneyo lwezixhobo ze-silicone ezibonelela ngeempawu ezikhethekileyo, ezinenzuzo kwiintlobo ezahlukeneyo zezicelo kunye neemveliso kuwo wonke amacandelo, kuquka ukwakhiwa, i-electronics, ubunjineli, ukhathalelo lwempilo. , izinto zokuthambisa kunye nenkathalo yobuqu.

I-D4, i-D5 kunye ne-D6 zisetyenziswa rhoqo njenge-chemical intermediates, oku kuthetha ukuba izinto ziqeshwe kwinkqubo yokuvelisa kodwa zikhona kuphela njengobumdaka obuphantsi kwimveliso yokugqibela.

Ithetha ukuthini i-SVHC?

I-SVHC imele "Into eNxakekisa Kakhulu".

Ngubani owenza isigqibo se-SVHC?

Isigqibo sokuchonga i-D4, i-D5, i-D6 njenge-SVHC senziwe yiKomiti yaMazwe angamaLungu e-ECHA (MSC), equlunqwe ziingcali ezonyulwe ngamaZwe angamaLungu e-EU kunye ne-ECHA.

Amalungu e-MSC acelwe ukuba ahlole iidosi zobugcisa ezifakwe yiJamani kwi-D4 ne-D5, kunye ne-ECHA ye-D6, kunye namagqabantshintshi afunyenwe ngexesha lokubonisana noluntu.

Umyalelo wezi ngcali kukuvavanya nokuqinisekisa isiseko senzululwazi esixhasa izindululo ze-SVHC, kwaye hayi ukuvavanya impembelelo enokubakho.

Kutheni i-D4, i-D5 kunye ne-D6 zidweliswe njenge-SVHC?

Ngokusekwe kwiikhrayitheriya ezisetyenziswe kwi-REACH, i-D4 iyahlangabezana nemilinganiselo ye-Persistent, Bioaccumulative and Toxic (PBT) substances, kwaye i-D5 kunye ne-D6 iyahlangabezana nemilinganiselo yezinto eziZingisayo kakhulu, ze-Bioaccumulative (vPvB) kakhulu.

Ukongezelela, i-D5 kunye ne-D6 zibhekwa njenge-PBT xa ziqulethe ngaphezu kwe-0.1% D4.

Oku kukhokelele ekutyunjweni ngamaZwe angamaLungu e-EU kuluhlu lwee-SVHC. Nangona kunjalo, sikholelwa ukuba imilinganiselo ayivumeli uluhlu olupheleleyo lobungqina obufanelekileyo bezenzululwazi ukuba buthathelwe ingqalelo.