Halogen-Free Flame Retardant Formulation thiab Processing Technology rau Epoxy Resin
Cov neeg siv khoom tab tom nrhiav ib puag ncig tus phooj ywg, tsis muaj halogen, thiab hnyav-hlau-dawb nplaim retardant haum rau epoxy resin nrog anhydride curing system, yuav tsum tau ua raws li UL94-V0. Tus neeg sawv cev kho yuav tsum yog tus neeg sawv cev kub epoxy curing nrog Tg siab tshaj 125 ° C, yuav tsum tau kho cua sov ntawm 85-120 ° C thiab qeeb cov tshuaj tiv thaiv ntawm chav tsev kub. Hauv qab no yog cov ncauj lus kom ntxaws formulation raws li tus neeg thov.
I. Nplaim Retardant Formulation System
1. Core Flame Retardant System: Phosphorus-Nitrogen Synergy
Nplaim Retardant Information Table
| Nplaim Retardant | Mechanism | Pom zoo Loading | Lus hais |
|---|---|---|---|
| Aluminium hypophosphite | Condensed-theem nplaim hluav taws retardancy, tsim aluminium phosphate char txheej | 10-15% | Thawj nplaim retardant, decomposition temp. > 300 ° C |
| Ammonium polyphosphate (APP) | Intumescent nplaim retardancy, synergizes nrog txhuas hypophosphite | 5-10% | Acid-resistant APP yuav tsum tau |
| Melamine cyanurate (MCA) | Nitrogen qhov chaw, txhim kho phosphorus synergy, suppresses haus luam yeeb | 3-5% | Txo dripping |
2. Pab Nplaim Retardants thiab Synergists
Cov Ntaub Ntawv Pabcuam Nplaim Retardants
| Nplaim Retardant | Mechanism | Pom zoo Loading | Lus hais |
|---|---|---|---|
| Zinc borate | Txhawb char tsim, suppresses afterglow | 2-5% | Cov nyiaj ntau dhau tuaj yeem ua rau qeeb |
| Zoo aluminium hydroxide | Endothermic cua txias, pa taws nkoos | 5-8% | Tswj chaw thau khoom (kom tsis txhob Tg txo) |
3. Piv txwv Formulation (Tag nrho Loading: 20–30%)
Base Formulation (Relative to Total Resin Content)
| Cheebtsam | Cov ntsiab lus ( txheeb ze rau Resin) |
|---|---|
| Aluminium hypophosphite | 12% |
| APP | 8% |
| MCA | 4% |
| Zinc borate | 3% |
| Aluminium hydroxide | 5% |
| Loading tag nrho | 32% (kho tau rau 25-30%) |
II. Cov kauj ruam tseem ceeb
1. Sib tov thiab dispersion
A. Kev Kho Mob Ua Ntej:
- Qhuav aluminium hypophosphite, APP, thiab MCA ntawm 80 ° C rau 2 teev (tiv thaiv kom tsis txhob ya raws).
- Kho inorganic fillers (aluminium hydroxide, zinc borate) nrog silane coupling tus neeg sawv cev (xws li KH-550).
B. Kev sib xyaw ua ke:
- Epoxy resin + nplaim retardants (60 ° C, do rau 1h)
- Ntxiv anhydride curing tus neeg sawv cev (kub kub <80 ° C)
- Nqus degassing (-0.095 MPa, 30 min)
2. Cov txheej txheem kho
Kauj Ruam Curing (Sib npaug nplaim retardant stability thiab siab Tg):
- 85 ° C / 2h (kev pib qeeb, txo cov npuas)
- 120 ° C / 2h (ua kom tiav cov tshuaj tiv thaiv anhydride)
- 150 ° C / 1h (nce crosslinking ceev, Tg> 125 ° C)
3. Cov Lus Cim Tseem Ceeb
- viscosity tswj: Yog tias viscosity siab dhau, ntxiv 5% reactive epoxy diluent (xws li AGE).
- Kev kho qeeb: Siv methylhexahydrophthalic anhydride (MeHHPA) lossis ntxiv 0.2% 2-ethyl-4-methylimidazole (slows room-temperature reaction).
III. Kev Tshawb Fawb Txog Kev Ua Haujlwm & Kev Kho Kom Zoo
1. Nplaim Retardancy:
- UL94 V0 test (1.6mm thickness): Xyuas kom lub sij hawm hlawv <10 sec, tsis muaj dripping.
- Yog tias ua tsis tiav: Nce aluminium hypophosphite (+ 3%) lossis APP (+ 2%).
2. Thermal Performance:
- DSC xeem rau Tg: Yog tias Tg <125 ° C, txo cov txhuas hydroxide (tsawg Tg vim endothermic effect).
3. Mechanical Properties:
- Yog tias lub zog flexural poob qis, ntxiv 1-2% nano-silica rau kev txhawb nqa.
IV. Tej teeb meem & kev daws teeb meem
Nplaim Retardant Issues & Solutions Table
| Qhov teeb meem | Ua rau | Kev daws |
|---|---|---|
| Kev kho tsis tiav | Kev nqus dej los yog pH cuam tshuam los ntawm cov nplaim hluav taws | Ua ntej qhuav fillers, siv acid-resistant APP |
| Cov dej ntws tsis zoo | Ntau dhau loading | Txo aluminium hydroxide rau 3% los yog ntxiv diluent |
| UL94 tsis ua haujlwm | Tsis txaus PN synergy | Nce MCA (rau 6%) lossis aluminium hypophosphite (mus rau 15%) |
V. Alternative Formulation (Yog xav tau)
Hloov ib feem ntawm APP nrog DOPO derivatives (piv txwv li, DOPO-HQ):
- 8% DOPO-HQ + 10% aluminium hypophosphite txo tag nrho cov khoom thauj (~ 18%) thaum tswj kev ua haujlwm.
Qhov kev sib xyaw ua ke no sib npaug cov nplaim hluav taws xob, kev nyab xeeb ib puag ncig, thiab kev ua haujlwm kub. Kev sim me me (500g) raug pom zoo ua ntej kev tsim tawm tag nrho.
More info., pls contact lucy@taifeng-fr.com
Post lub sij hawm: Lub Xya hli ntuj-25-2025
