Methyl methacrylate

Suav lub npe: methyl methacrylate, hu ua MMA yog ib qho tseem ceeb tshuaj raw khoom uas muaj peev xwm nws tus kheej-polymerize los yog copolymerize nrog lwm cov monomers nyob rau hauv lub teeb thiab tshav kub los yog catalysts. Nws yog tsuas yog siv los tsim polymethyl methacrylate (PMMA luv luv) thiab polyvinyl chloride cuam tshuam kev hloov pauv (xws li ACR, MBS). Nws tseem tuaj yeem siv rau hauv cov txheej txheem, cov nplaum, textile printing thiab dyeing auxiliaries thiab lwm yam. Nws muaj ntau yam kev siv.

Lub ntsiab synthesis txheej txheem ntawm MMA
Muaj ntau ntau txoj kev sib txuas rau MMA, suav nrog acetone cyanohydrin method (ACH method), isobutylene / tert-butanol oxidation method (C4 method), ethylene method (C2 method), methanol-methyl acetate method (C1 method), thiab lwm yam. rau lawv Cov khoom siv raw carbon tooj txawv thiab tuaj yeem muab faib ua C1 txoj kev, C2 txoj kev, C3 txoj kev thiab C4 txoj kev.
Los ntawm kev xav thoob ntiaj teb, cov txheej txheem tsim khoom siv feem ntau yog ACH txoj kev. Cov txheej txheem thev naus laus zis no yog qhov paub tab, ruaj khov thiab yooj yim, suav txog li 61.6% ntawm lub ntiaj teb kev tsim khoom, feem ntau yog nyob hauv North America, Western Europe, thiab Tuam Tshoj; ua raws li C4 txoj kev, tsim los ntawm Nyiv Shokubai Chemical Tsim los ntawm Industrial Corporation thiab Mitsubishi Rayon Company hauv xyoo 1982, thev naus laus zis siab heev, cov khoom siv raw tsis muaj tshuaj lom thiab tsis muaj mob, muaj ob peb cov khoom lag luam thiab tus nqi qis, suav nrog rau li ntawm 30.5% ntawm lub ntiaj teb no ntau lawm.

Chemical Properties

Colorless kua, yooj yim volatile. Soluble nyob rau hauv ntau yam organic solvents xws li ethanol, ether, acetone, thiab lwm yam. Me ntsis soluble nyob rau hauv ethylene glycol thiab dej.

Kev siv:

Feem ntau yog siv los ua monomer ntawm cov iav organic, thiab tseem siv los ua lwm yam yas, txheej, thiab lwm yam.

xwm

CAS Nr .: 80-62-6

Cov mis mos molecular C5H8O2

Molecular hnyav 100.12

EINECS No. 201-297-

Melting point -48 ° C (lit.)

Boiling point 100 ° C (lit.)

Qhov ceev 0.936g / mL ntawm 25 ° C (lit.)

Vapor ceev 3.5 (vsair)

Vapor siab 29mmHg (20 ° C)

Flash point 50 ° F

Cia tej yam kev mob 2-8 ° C Solubility 15g / l Daim ntawv Crystalline hmoov los yog siv lead ua

Cov ntaub ntawv tiv tauj

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