Methylene Chloride vs Acetone li Paint Remover

Thaum nws los txog rau kev tshem tawm cov xim, ob ntawm cov kuab tshuaj feem ntau yog methylene chloride (dichloromethane, methylene dichloride, CH₂Cl₂) thiab acetone (C₃H₆O). Ob leeg muaj txiaj ntsig zoo ntawm cov xim pleev xim, cov kua roj vanish, thiab cov coatings, tab sis lawv txawv heev ntawm cov khoom siv tshuaj, kev ua tau zoo, kev nyab xeeb, thiab kev cuam tshuam ib puag ncig.

Kab lus no muab cov ncauj lus kom ntxaws sib piv ntawm methylene chloride vs. acetone li cov xim tshem tawm, pab cov kws tshaj lij thiab cov neeg nyiam DIY xaiv qhov kev xaiv zoo tshaj plaws rau lawv cov kev xav tau.

1. Methylene Chloride (Dichloromethane, methylene dichloride, CH₂Cl₂)

Boiling Point: 39.6℃(evaporates sai)

Solvency Power: Muaj zog heev - dissolves feem ntau cov xim, nrog rau epoxies, polyurethanes, thiab acrylics.

Mechanism:

Penetrates xim txheej sai sai.

Swells thiab softens lub txheej kom yooj yim scraping.

Feem ntau siv rau hauv gel-raws li cov xim pleev xim rau kev ua haujlwm ntev.

2. Acetone (C₃H₆O)

Boiling Point: 56℃(evaporates sai dua dej tab sis qeeb dua methylene chloride)

Solvency Power: Siv tau los tiv thaiv latex, shellac, thiab qee cov roj- cov xim pleev xim tab sis tawm tsam nrog cov txheej tawv tawv.

Mechanism:

Sib tov cov xim binders los ntawm dissolution.

Ua haujlwm zoo tshaj plaws ntawm cov xim tshiab lossis nyias txheej.

Qhov txawv tseem ceeb:

Methylene dichloride yog qhov hnyav dua thiab ua haujlwm ntawm ntau txheej ntawm cov xim tawv tawv.

Acetone zoo dua rau kev ntxuav lub teeb thiab cov txeej tshiab.

Qhov zoo tshaj plaws siv Case:

 Methylene Chloride:

Hnyav-cov dej num tshem tawm (piv txwv li, kho cov rooj tog zaum, kho tsheb kho tsheb).

Thick, kho cov xim txheej.

 Acetone:

Kev kov me me-ups (xws li, txhuam hniav, tshem tawm qhov chaw).

Tsis yog- daim ntawv thov kev lag luam (xws li, DIY tej yaam num).

1. Methylene Chloride phom sij

Toxicity:

Kev nqus pa tuaj yeem ua rau kiv taub hau, mob taub hau, thiab txawm tias ua pa nyuaj siab (tswj los ntawm OSHA).

Kev sib cuag ntawm daim tawv nqaij ua rau muaj tshuaj tua kab mob thiab dermatitis.

Flammability:

Tsis yog-flammable tab sis ua rau tawg vapors- huab cua sib tov thaum kub kub.

Kev cai:

Txwv tsis pub cov neeg siv khoom pleev xim rau hauv EU thiab qee lub xeev Asmeskas.

Yuav tsum muaj hnab looj tes, tsom iav, thiab lub tshuab ua pa hauv kev siv.

2. Acetone Safety Profile

Toxicity:

Cov tshuaj lom tsawg dua li methylene chloride tab sis tuaj yeem ua rau qhov muag / tawv nqaij.

High vapor concentrations yuav ua rau xeev siab lossis kiv taub hau.

Flammability:

Cov nplaim hluav taws kub heev (flash point: -20 degree) - kom deb ntawm cov nplaim taws.

Kev cai:

Feem ntau tso cai rau cov neeg siv khoom siv nrog qhov cua kom zoo.

Tus yeej rau kev nyab xeeb: Acetone(tab sis tseem yuav tsum tau ceev faj).

Methylene chloride muaj qhov tseem ceeb ntawm qhov chaw ib puag ncig. Raws li VOC, nws ua rau muaj kev tsim hauv av - qib ozone, ib qho tseem ceeb ntawm smog, uas tuaj yeem ua mob rau cov nroj tsuag lub neej thiab tib neeg txoj kev ua pa. Nws kuj tseem muaj peev xwm nruab nrab rau bioaccumulate hauv cov kab mob hauv dej, ua rau muaj kev pheej hmoo rau cov dej ecosystems. Vim yog cov kev txhawj xeeb no, ntau lub teb chaws thiab cheeb tsam tau siv cov kev cai nruj ntawm kev siv cov tshuaj methylene chloride hauv cov neeg siv khoom. Piv txwv li, European Union tau txwv tsis pub siv cov tshuaj pleev xim rau hauv tsev, thiab Lub Chaw Haujlwm Saib Xyuas Kev Tiv Thaiv Ib puag ncig hauv Tebchaws Meskas (EPA) tau txwv tsis pub cov neeg siv khoom feem ntau - qib methylene chloride - raws li cov xim strippers.

Acetone, thaum tseem yog VOC, muaj kev cuam tshuam ib puag ncig qis hauv ntau txoj hauv kev. Nws tawg sai dua nyob rau hauv cov huab cua, txo nws txoj kev koom tes rau ntev - huab cua phem. Nws tseem yog biodegradable, txhais tau tias nws tuaj yeem tawg los ntawm cov kab mob hauv av thiab dej, txo qis nws qhov kev pheej hmoo ntawm ib puag ncig. Txawm li cas los xij, nws qhov kub hnyiab tau txhais tau hais tias kev pov tseg tsis raug lossis kev siv tseem tuaj yeem ua rau muaj kev phom sij, uas cuam tshuam rau ib puag ncig los ntawm cov hluav taws kub hnyiab lossis cov tshuaj lom.

Methylene chloride - raws li cov xim tshem tawm feem ntau nyiam nyob rau hauv kev lag luam thiab cov chaw ua haujlwm uas ceev thiab lub zog tseem ceeb. Lawv feem ntau yog siv rau stripping xim los ntawm hlau, ntoo, thiab pob zeb nto hauv kev kho tsheb, kev tsim kho, thiab kho cov rooj tog zaum. Txawm li cas los xij, lawv tsis tsim nyog siv rau qee yam khoom siv, xws li qee cov yas (xws li ABS lossis polystyrene) lossis roj hmab, vim tias lawv tuaj yeem ua rau o lossis puas. Tsis tas li ntawd, vim muaj kev nyab xeeb cov cai, lawv siv tau txwv ntau rau cov kws tshaj lij uas tau txais kev cob qhia nrog kev nkag mus rau cov cuab yeej tiv thaiv kom raug thiab zoo - qhov chaw ua haujlwm ventilated.

Acetone yog ntau yam nyob rau hauv cov nqe lus ntawm cov ntaub ntawv compatibility, ua rau nws haum rau siv ntawm hlau, iav, thiab ntau yam yas. Nws yog qhov kev xaiv nrov rau DIY tej yaam num, xws li tshem cov xim los ntawm cov cuab yeej me me, rooj tog, lossis cov khoom siv kos duab. Nws qhov ceev ceev evaporation kuj ua rau nws muaj txiaj ntsig zoo rau kev ntxuav cov xim pleev xim los yog npaj qhov chaw ua ntej repainting. Txawm li cas los xij, nws cov kev txwv hauv kev tuav cov xim tuab lossis kho kom zoo txhais tau tias nws tsis tshua muaj txiaj ntsig rau qhov loj - nplai lossis hnyav - cov dej num stripping.​

Hauv kev xaus, kev xaiv ntawm methylene chloride thiab acetone ua cov xim tshem tawm yog nyob ntawm qhov xav tau tshwj xeeb ntawm qhov project. Methylene chloride muaj kev nrawm dua thiab ua tau zoo rau cov xim tawv tawv tab sis tuaj nrog kev nyab xeeb thiab kev pheej hmoo ib puag ncig, txwv tsis pub siv rau cov chaw tshaj lij. Acetone, thaum muaj kev nyab xeeb dua thiab zoo ib puag ncig, yog qhov zoo dua rau kev ua haujlwm sib zog thiab cov xim tshiab. Raws li cov kev cai ntawm cov tshuaj lom neeg muaj kev phom sij txuas ntxiv mus, nws tseem tsim nyog xav txog lwm txoj hauv kev, cov xim zoo nkauj dua - stripping xaiv, tab sis tam sim no, kev nkag siab txog kev lag luam tawm - tawm ntawm ob cov kuab tshuaj no tseem ceeb rau kev ua tiav thiab lub luag haujlwm tshem tawm cov xim.

Yog xav paub ntxiv txog methylene dichloride lossis cov nqi lag luam tam sim no, hu rau peb pab neeg hnub no!

Yuav koom tes nrog peb li cas?

Peb qhov chaw nyob

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