Qhov sib ntxiv ntawm aluminium hypophosphite thiab MCA rau epoxy nplaum ua rau muaj pa taws ntau. Siv zinc borate los txo cov pa luam yeeb ntom ntom thiab emission yog ua tau, tab sis cov txheej txheem uas twb muaj lawm yuav tsum tau ua kom zoo rau qhov sib piv.
1. Kev Tiv Thaiv Kev Haus Luam Yeeb ntawm Zinc Borate
Zinc borate yog cov pa luam yeeb muaj txiaj ntsig thiab cov nplaim hluav taws-retardant synergist. Nws mechanisms muaj xws li:
- Char Formation Promotion: Ua cov txheej txheej tuab lub sijhawm sib txuas, cais cov pa thiab cua sov, thiab txo cov roj av tso pa tawm.
- Haus luam yeeb Inhibition: Catalyzes cross-linking cov tshuaj tiv thaiv kom txo tau cov pa luam yeeb, txo cov pa luam yeeb ntom ntom (tshwj xeeb tshaj yog zoo rau cov polymers xws li epoxy).
- Synergistic nyhuv: Txhim kho cov nplaim hluav taws xob thaum ua ke nrog phosphorus-raws li (xws li, aluminium hypophosphite) thiab nitrogen-based (piv txwv li, MCA) nplaim retardants.
2. Lwm yam lossis ntxiv cov pa luam yeeb
Rau kev ua kom zoo ntxiv ntawm kev haus luam yeeb, xav txog cov kev daws teeb meem hauv qab no:
- Molybdenum compounds(xws li zinc molybdate, molybdenum trioxide): zoo dua zinc borate tab sis costlier; pom zoo kom muab cov zinc borate (xws li zinc borate: zinc molybdate = 2: 1).
- Aluminium / Magnesium Hydroxide: Yuav tsum muaj kev thauj khoom siab (20-40 phr), uas yuav cuam tshuam rau epoxy cov khoom siv kho tshuab-kho ceev faj.
3. Pom zoo kev hloov kho
Xav tias tus thawj formulation yogaluminium hypophosphite + MCA, ntawm no yog cov lus qhia optimization (raws li 100 qhov chaw epoxy resin):
Kev xaiv 1: Direct Ntxiv ntawm Zinc Borate
- Aluminium hypophosphite: Txo los ntawm 20-30 phr rau15-25 hnub
- MCA: Txo los ntawm 10-15 phr rau8-12 dr hab
- Zinc borate: Ntxiv5-15 hnub(pib sim ntawm 10 phr)
- Tag nrho cov nplaim retardant cov ntsiab lus: Khaws ntawm30-40 Nws(tsis txhob muaj ntau dhau los cuam tshuam rau kev ua haujlwm nplaum).
Kev xaiv 2: Zinc Borate + Zinc Molybdate Synergy
- Aluminium hypophosphite:15-20 hnub
- MCA:5-10 dr hab
- Zinc borate:8-12 dr hab
- Zinc molybdate:4-6 dr hab
- Tag nrho cov nplaim retardant cov ntsiab lus:30-35 hnub.
4. Kev ntsuas qhov ntsuas qhov tseem ceeb
- Nplaim Retardancy: UL-94 ntsug hlawv, LOI xeem (lub hom phiaj: V-0 lossis LOI> 30%).
- Haus luam yeeb ntom: Siv lub ntsuas pa luam yeeb (piv txwv li, NBS pa taws chamber) los sib piv qhov txo qis hauv Smoke Density Rating (SDR).
- Mechanical Properties: Ua kom lub zog tensile thiab adhesion lub zog ua tau raws li qhov xav tau tom qab kho.
- Kev ua tau zoo: Txheeb xyuas qhov sib txawv ntawm cov nplaim retardants tsis cuam tshuam rau viscosity lossis lub sijhawm kho.
5. Kev txiav txim siab
- Particle Loj Tswj: Opt rau nano-sized zinc borate (xws li, particle loj <1 μm) los txhim kho dispersion.
- Kev hloov kho saum npoo: Kho zinc borate nrog silane coupling tus neeg sawv cev los txhim kho kev sib raug zoo nrog epoxy resin.
- Txoj Cai Ua Raws Cai: Xyuas kom cov nplaim hluav taws raug xaiv raws li RoHS, REACH, thiab lwm yam kev cai.
6. Piv txwv Formulation (Reference)
| Cheebtsam | Tus nqi (phr) | Muaj nuj nqi |
|---|---|---|
| Epoxy cob | 100 | Matrix cob |
| Aluminium hypophosphite | 18 | Thawj nplaim taws retardant (P-raws li) |
| MCA | 10 | Gas-phase nplaim retardant (N-raws li) |
| Zinc borate | 12 | Smoke suppression synergist |
| Curing tus neeg sawv cev | Raws li xav tau | Xaiv raws li qhov system |
7. Cov ntsiab lus
- Zinc borate yog ib qho kev xaiv zoo rau kev txo cov pa luam yeeb. Xav kom ntxiv10-15 dr habthaum txo qis aluminium hypophosphite / MCA cov ntsiab lus.
- Txhawm rau tshem tawm cov pa luam yeeb ntxiv, sib tov nrog cov tshuaj molybdenum (xws li,4-6 dr hab).
- Kev sim validation yog tsim nyog los sib npaug cov nplaim hluav taws xob, hluav taws xob hluav taws xob, thiab cov khoom siv tshuab.
Let me know if you’d like any refinements! Lucy@taifeng-fr.com
Post lub sij hawm: May-22-2025
