Calcium thiab zinc stabilizer los ntawm kev siv tshuaj ua tau muab faib ua cov khoom, kua thiab paste rau peb pawg, raws li kev cais ntawm PVC cov khoom muab faib ua: profiles, yeeb nkab, xov tooj, calendering film nrog calcium thiab zinc stabilizer.
Calcium thiab zinc stabilizer los ntawm calcium ntsev, zinc ntsev, lubricants, Ca-Zn Stabilizer antioxidants raws li lub ntsiab feem ntawm kev siv tshwj xeeb txheej txheem thiab synthesis. Nws tsis yog tsuas hloov tau cov hmoov lead thiab cadmium ntsev thiab cov organic tin thiab lwm cov tshuaj tiv thaiv cov kab mob, tab sis kuj muaj kev thermal stability zoo heev, lub teeb nyob ruaj ntseg thiab daim duab thiab lub zog xim. Xyaum tau muaj pov thawj tias cov khoom siv PVC cov khoom, kev ua haujlwm, Ca-Zn Stabilizer thermal stability zoo li ua rau ntsev stabilizer, yog ib qho zoo uas tsis muaj teeb meem.
Calcium-zinc stabilizers feem ntau yog tsim nrog lwm tus neeg pabcuam kom ua tiav qhov zoo tshaj plaws, uas yog hu ua auxiliary stabilizers. Ca-Zn Stabilizer Li ntawd, cov kev pabcuam uas txhawb zog no yog dabtsi? Calcium zinc stabilizer chaw tsim tshuaj paus ntawm cov me me nrog koj kom nkag siab.
1, β-diketone
Β-diketone yog ib qho ntawm cov chaw pabcuam ntau tshaj plaws. Nws tuaj yeem hloov nrog allyl chloride hauv PVC kom tswj tau lub tshuab tsis ruaj tsis zoo ntawm PVC, sib sau ua ke ntawm CC, thiab ua ib tus qauv ruaj khov. Nws tuaj yeem tsim cov teebmeem synergistic tseem ceeb nrog calcium thiab zinc stabilizer, Ca-Zn Stabilizer li txhim kho qhov pib thiab lub sijhawm xim ntawm PVC yas khoom.
2, phosphite
Phosphite yog ib qho antioxidant auxiliary thiab plays lub luag haujlwm tseem ceeb hauv qhov kab mob antioxidant. Nyob rau hauv cov qauv hauv PVC feem ntau ntseeg tias lub luag hauj lwm tseem ceeb ntawm phosphite chelating agent, thaum siv ib leeg tsis muaj qhov tseem ceeb ntawm kev ruaj ntseg, tiam sis nrog cov tshuaj ntxuav tes thiab tom qab siv, tau cov hlau chloride, Ca-Zn Stabilizer ua kom cov cua sov thiab tiv thaiv tsis zoo, kom muaj kev pom zoo.
3, polyol tebchaw
Lub mechanism ntawm polyol li kev pabcuam ruaj ruaj yog zoo li cov phosphite thiab β-diketone, uas yog cov zinc chloride tsim los ntawm txoj hnyav, li no ncua sijhawm txheej txheem ntawm PVC. Hom no muaj ntau hom β-diketone, epoxy compounds, hydrotalcite nrog mos PVC siv, uas zoo heev synergies.
4, tshuaj tua kab mob
Vim tias qhov degradation ntawm PVC ua raws cov thermal degradation nyob rau hauv cov kev mob hauv tsev thiab cov thermal oxygenation nyob rau hauv aerobic mob, cov antioxidant yuav siv tau ua ib qho kev tiv thaiv ntawm PVC, nrog phenolic antioxidants nrog phosphites los yog thioesters Yuav siv ib leeg phosphite, Ca-Zn Stabilizer tuaj yeem ua rau muaj kev ruaj ntseg zoo, thiab qhov antioxidant system ob leeg los txhim kho cov xim thawj zaug, txhim kho lub luag haujlwm ntev ntawm ob lub luag haujlwm hauv cov qauv tsim tawm tsis pom kev.
5, epoxy sib txuas
Epoxy compounds thiab calcium thiab zinc stabilizers muaj ib qho kev phem zoo. Lub hauv paus ntsiab lus yog cov roj epoxy soybean thiab HC1 cov tshuaj tiv thaiv los ua cov tshuaj chlorinated, thiab mam li hnov mob nrog cov xab npum HC1 tsiv mus rau hauv cov xuab zeb hlau, rov tsim ntawm lub voj voos. Tsis tas li ntawd, Ca-Zn Stabilizer epoxy soybean roj tau txav cov allyl chloride nyob rau hauv muaj ib Lewis acid xws li zinc compound los ua ib qho chaw ruaj khov ether.
6, hydrotalcite
Ib qho kev ua haujlwm siab ua kom tau zoo tshaj hauv cov calcium-zinc stabilizer feem ntau ntseeg tau tias ua tiav los ntawm HCL, thiab nws lub peev xwm HCL yog qhov tseeb ntawm cov thermal stability lub sijhawm. Lub tswv yim muab faib ua ob txoj hauv kev: thawj, cov ntsiab lus (CO3) ntawm cov kev sib tshuam yog hloov los ntawm Cl- los ntawm qhov kev hloov pauv, thiab tom qab ntawd lub hydroxide moiety ntawm txheej yog neutralized nrog HC1 thiab cov qauv kev tivellar.