Hydrotalc yog ib qho tseem ceeb raw khoom rau calcium zinc stabilizers. Hydrotalc muaj cov qauv tshwj xeeb thiab cov khoom siv, thiab nws cov khoom tseem ceeb tshaj plaws yog alkalinity thiab ntau qhov porosity, nrog rau qhov tshwj xeeb thiab kev ua tau zoo thiab kev ua tau zoo. Nws tuaj yeem nqus tau cov hydrogen chloride tso tawm thaum lub sij hawm degradation ntawm PVC, qeeb tus kheej catalytic nyhuv ntawm hydrogen chloride ntawm PVC resin, thiab ua raws li ib tug acid absorbent, uas yog hu ua thermal stability. Nws feem ntau yog siv los ua thermal stabilizer.
Hydrotalc kuj muaj qhov zoo ntawm kev pom zoo, rwb thaiv tsev, huab cua tsis kam, thiab kev ua haujlwm. Nws tsis muaj kab mob los ntawm sulfides, tsis muaj tshuaj lom, thiab tuaj yeem ua haujlwm nrog cov cua sov stabilizers xws li zinc soap thiab organic tin. Nws yog ib hom kev cog lus zoo heev ntawm cov khoom siv hluav taws xob uas tsis muaj tshuaj lom thaum tshav kub kub stabilizer.
Cov qauv ntawm hydrotalcite yog txheej nrog qhov sib txawv loj ntawm 0.76-0.79nm, thiab nws muaj thaj chaw loj tshwj xeeb, uas tso cai rau nws cov pawg hydroxyl saum npoo tuaj yeem ua rau muaj kev cuam tshuam nrog hydrogen chloride thiab muaj txiaj ntsig zoo rau stabilizers.
Qhov tsis zoo ntawm hydrotalcite yog:
1. Nyob rau hauv cov nqe lus ntawm thawj whiteness, hydrotalcite tsis muaj kev cuam tshuam rau kev txhim kho ntawm PVC thawj xim ib leeg los yog synergy nrog cov calcium zinc system. Tom qab kev laus hauv qhov cub kub 180 ℃, cov qauv xim zoo li liab.
2. Ntawm kev ruaj ntseg ntawm Congo liab kub, ib qho kev txiav txim ntawm hydrotalcite tuaj yeem txhim kho lub sijhawm thermal stability ntawm PVC, thiab nrog rau qhov nce ntxiv, lub sij hawm thermal stability ntawm PVC qhia tau tias muaj kev nce ntxiv, tab sis qhov nce tsis tseem ceeb.
3. Thaum kev sib xyaw ntawm hydrotalcite thiab calcium zinc system yog siv los ua cov thermal stabilizer, lub sij hawm thermal stability ntawm PVC yog qhov zoo dua, thiab cov qauv ntawm kev nce thermal stability lub sij hawm nrog nce ntxiv cov nyiaj kuj txaus siab. Yog li ntawd, dihydroxy hlau hydroxides yuav tsum tau muab cais raws li lub sij hawm ntev auxiliary thermal stabilizers, uas muaj peev xwm mus cuag lub sij hawm ntev thermal stability ntawm PVC. Yog li, thaum sib xyaw calcium zinc stabilizers, hydrotalcite yog ib qho tseem ceeb raw cov ntaub ntawv.
Post lub sij hawm: May-24-2024
