- D4 (Octamethylcyclotetrasiloxane) D4

- D5 (Decamethylcyclopentasiloxane) D5

- D6 (Dodecamethylcyclohexasiloxane) D6

Kev txwv ntawm D4 thiab D5 hauv Cov Khoom Kho Tus Kheej:

Octamethylcyclotetrasiloxane (D4thiab decamethylcyclopentasiloxane (D5) tau ntxiv rauREACH annex XVII txwv cov npe(ntu 70) byCOMMISION REGULATION (EU) 2018/35ntawm10 Lub Ib Hlis 2018. D4 thiab D5 yuav tsum tsis txhob muab tso rau hauv kev lag luam hauv cov khoom siv tshuaj pleev ib ce hauv qhov sib npaug los yog ntau dua.0.1%los ntawm qhov hnyav ntawm ob yam khoom, tom qab31 Lub Ib Hlis 2020.

Vim li cas D4 thiab D5 txwv?

D4 thiab D5 yog cyclosiloxanes feem ntau yog siv los ua monomers rau silicone polymer ntau lawm. Lawv kuj muaj kev siv ncaj qha hauv cov khoom tu tus kheej. D4 tau raug txheeb xyuas tias yog aTsis tu ncua, bioaccumulative thiab tshuaj lom (PBT) thiab mob heev heev bioaccumulative (vPvB). D5 tau raug txheeb xyuas tias yog cov khoom vPvB.

Vim muaj kev txhawj xeeb tias D4 thiab D5 tej zaum yuav muaj peev xwm sib sau ua ke hauv ib puag ncig thiab ua rau muaj kev cuam tshuam uas tsis tuaj yeem xav txog thiab hloov tsis tau mus ntev, ECHA's Risk Assessment (RAC) thiab Socio Economic.Kev Ntsuam Xyuas (SEAC) Pawg Neeg Saib Xyuas tau pom zoo nrog UK cov lus pom zoo kom txwv tsis pub D4 thiab D5 hauv kev ntxuav cov khoom tu tus kheej thaum Lub Rau Hli 2016 vim tias lawv tuaj yeem nqes dej thiab nkag mus rau hauv pas dej, dej hiav txwv, thiab dej hiav txwv.

Kev txwv tsis pub siv D4 thiab D5 hauv lwm yam khoom?

Txog tam sim no D4 thiab D5 tsis txwv rau lwm yam khoom. ECHA tab tom ua haujlwm ntawm qhov kev thov ntxiv kom txwv tsis pub D4 thiab D5 hauvtawm ntawm cov khoom tu tus kheejthiab lwm yamcov neeg siv khoom / cov khoom lag luam(xws li kev tu kom qhuav, waxes thiab polishes, ntxuav thiab ntxuav cov khoom). Daim ntawv thov yuav raug xa mus rau kev pom zoo hauvPlaub Hlis 2018. Kev lag luam tau tshaj tawm qhov tsis txaus siab rau qhov kev txwv ntxiv no.

HauvPeb Hlis 2018, ECHA kuj tau thov kom ntxiv D4 thiab D5 rau SVHC daim ntawv teev npe.

Siv:

• COMMISION REGULATION (EU) 2018/35
• Pawg Neeg Saib Xyuas Kev Ruaj Ntseg (RAC) Pom Zoo Daim Ntawv Pom Zoo kom txwv tsis pub siv D4 thiab D5 hauv
• Ntxuav-tawm tshuaj pleev ib ce
• Lub hom phiaj ntawm kev txwv ntawm D4 thiab D5 hauv lwm yam khoom
• Slicones Europe - Ntxiv REACH txwv rau D4 thiab D5 yog ntxov ntxov thiab tsis ncaj ncees - Lub Rau Hli 2017

Dab tsi yog silicones?

Silicones yog cov khoom tshwj xeeb uas siv ntau pua daim ntawv thov uas lawv xav tau kev ua haujlwm tshwj xeeb. Lawv siv los ua cov nplaum, lawv insulate, thiab lawv muaj cov khoom siv kho qhov muag / kho qhov muag / thermal kuj ntawm ntau lwm yam khoom. Lawv siv, piv txwv li, hauv kev kho mob thev naus laus zis, kev siv hluav taws xob tauj dua tshiab thiab kev txuag hluav taws xob, nrog rau cov thev naus laus zis digital, kev tsim kho thiab kev thauj mus los.

D4, D5 thiab D6 yog dab tsi thiab lawv siv qhov twg?

Octamethylcyclotetrasiloxane (D4), Decamethylcyclopentasiloxane (D5) thiab Dodecamethylcyclohexasiloxane (D6) yog siv los tsim ntau yam khoom siv silicone uas muab cov yam ntxwv tshwj xeeb, muaj txiaj ntsig zoo rau ntau yam kev siv thiab cov khoom siv thoob plaws cov haujlwm, suav nrog kev tsim kho, hluav taws xob, engineering, kho mob. , tshuaj pleev ib ce thiab kev saib xyuas tus kheej.

D4, D5 thiab D6 feem ntau yog siv los ua tshuaj intermediates, txhais tau hais tias cov khoom siv ua haujlwm hauv cov txheej txheem tsim khoom tab sis tsuas yog tam sim no raws li cov khoom tsis zoo hauv cov khoom kawg.

SVHC txhais li cas?

SVHC sawv cev rau "Cov Khoom Muaj Kev Nyuaj Siab Heev".

Leej twg tau txiav txim siab SVHC?

Qhov kev txiav txim siab los txheeb xyuas D4, D5, D6 raws li SVHC tau ua los ntawm ECHA Pawg Neeg Koom Tes Hauv Xeev (MSC), uas yog tsim los ntawm cov kws tshaj lij raug xaiv los ntawm EU Cov Tswv Cuab thiab ECHA.

MSC cov tswv cuab tau raug hais kom tshuaj xyuas cov ntaub ntawv thev naus laus zis xa los ntawm lub teb chaws Yelemees rau D4 thiab D5, thiab los ntawm ECHA rau D6, nrog rau cov lus pom tau txais thaum lub rooj sib tham pej xeem.

Lub luag haujlwm ntawm cov kws tshaj lij no yog txhawm rau txheeb xyuas thiab lees paub lub hauv paus kev tshawb fawb los ntawm SVHC cov lus pom zoo, thiab tsis yog ntsuas qhov cuam tshuam.

Vim li cas D4, D5 thiab D6 tau teev npe ua SVHC?

Raws li cov qauv siv hauv REACH, D4 ua tau raws li cov txheej txheem rau Persistent, Bioaccumulative thiab Toxic (PBT) cov tshuaj, thiab D5 thiab D6 ua tau raws li cov qauv rau Persistent, heev Bioaccumulative (vPvB) tshuaj.

Ntxiv rau, D5 thiab D6 raug suav tias yog PBT thaum lawv muaj ntau dua 0.1% D4.

Qhov no ua rau muaj kev xaiv tsa los ntawm EU Cov Tswv Cuab rau cov npe ntawm SVHCs. Txawm li cas los xij, peb ntseeg tias cov txheej txheem tsis tso cai rau tag nrho cov pov thawj kev tshawb fawb muaj feem cuam tshuam.