Halogen-Yemahara Flame Retardant Kugadzira uye Kugadzirisa Tekinoroji yeEpoxy Resin
Mutengi ari kutsvaga ine hushamwari kwezvakatipoteredza, halogen-isina, uye inorema-simbi-isina murazvo inodzoreredza inokodzera epoxy resin ine anhydride kurapa system, inoda kutevedzera UL94-V0. Mushonga unorapa unofanirwa kunge uri wepamusoro-tembiricha epoxy kurapa agent ine Tg inopfuura 125 ° C, inoda kupisa kupisa pa85-120 ° C uye inononoka kuita pane tembiricha. Pazasi pane kuumbwa kwakadzama sekukumbirwa nemutengi.
I. Flame Retardant Formulation System
1. Core Flame Retardant System: Phosphorus-Nitrogen Synergy
Flame Retardant Information Table
| Flame Retardant | Mechanism | Recommended Loading | Mashoko |
|---|---|---|---|
| Aluminium hypophosphite | Condensed-phase flame retardancy, inoumba aluminium phosphate char layer | 10–15% | Chekutanga murazvo retardant, decomposition temp. >300°C |
| Ammonium polyphosphate (APP) | Intumescent flame retardancy, inopindirana nealuminium hypophosphite | 5–10% | Acid-resistant APP inodiwa |
| Melamine cyanrate (MCA) | Nitrogen sosi, inowedzera phosphorus synergy, inodzvinyirira utsi | 3–5% | Inoderedza kudonha |
2. Anobatsira Flame Retardants uye Synergists
Inobatsira Flame Retardants Information Table
| Flame Retardant | Mechanism | Recommended Loading | Mashoko |
|---|---|---|---|
| Zinc borate | Inosimudzira kuumbwa kwechar, inodzvanya kupenya | 2–5% | Kuwedzera huwandu hunogona kunonoka kurapwa |
| Yakanaka aluminium hydroxide | Endothermic kutonhora, kudzvinyirira utsi | 5–8% | Kudzora kurodha (kudzivirira Tg kuderedza) |
3. Kugadzira Muenzaniso (Total Loading: 20–30%)
Base Formulation (Inoenderana neTotal Resin Content)
| Chikamu | Zvemukati (zvinoenderana neResin) |
|---|---|
| Aluminium hypophosphite | 12% |
| APP | 8% |
| MCA | 4% |
| Zinc borate | 3% |
| Aluminium hydroxide | 5% |
| Total Loading | 32% (inogadziriswa kusvika 25-30%) |
II. Key Processing Matanho
1. Kusanganisa uye Kupararira
A. Pre-Kurapwa:
- Dry aluminium hypophosphite, APP, uye MCA pa80 ° C kwemaawa maviri (inodzivirira kunyura).
- Rapa inorganic fillers (aluminum hydroxide, zinc borate) ne silane coupling agent (semuenzaniso, KH-550).
B. Kusanganisa Kutevedzana:
- Epoxy resin + Flame retardants (60°C, kurudzira kwe1h)
- Wedzera anhydride kurapa mumiririri (chengetedza tembiricha <80°C)
- Vacuum degassing (-0.095 MPa, 30 min)
2. Kurapa Maitiro
Nhanho Kurapa (Kuenzanisa kugadzikana kwemoto kudzoreredza uye yakakwira Tg):
- 85 ° C / 2h (inononoka kutanga, inoderedza mabhubhu)
- 120 ° C / 2h (inovimbisa yakakwana anhydride reaction)
- 150°C / 1h (inowedzera crosslinking density, Tg>125°C)
3. Key Notes
- Viscosity control: Kana viscosity yakanyanya kukwirira, wedzera 5% reactive epoxy diluent (semuenzaniso, AGE).
- Kunonoka kurapwa: Shandisa methylhexahydrophthalic anhydride (MeHHPA) kana kuwedzera 0.2% 2-ethyl-4-methylimidazole (inononoka kamuri-tembiricha reaction).
III. Performance Verification & Adjustment
1. Flame Retadancy:
- UL94 V0 bvunzo (1.6mm ukobvu): Ita shuwa yekupisa nguva <10 sec, hapana kudonha.
- Kana zvikatadza: Wedzera aluminium hypophosphite (+3%) kana APP (+2%).
2. Thermal Performance:
- DSC bvunzo yeTg: Kana Tg <125°C, dzikisa aruminiyamu hydroxide (inoderedza Tg nekuda kwe endothermic effect).
3. Mechanical Properties:
- Kana flexural simba richidonha, wedzera 1-2% nano-silica yekusimbisa.
IV. Zvingangoitika Nyaya & Mhinduro
Flame Retardant Issues & Solutions Table
| Nyaya | Chikonzero | Solution |
|---|---|---|
| Kurapwa kusina kukwana | Kutora unyoro kana kukanganiswa kwepH kubva kune zvinodzosa moto | Pre-dry fillers, shandisa acid-resistant APP |
| Kuyerera kwakashata kweresin | Yakawandisa filler kurodha | Deredza aluminium hydroxide kusvika pa3% kana kuwedzera diluent |
| UL94 kukundikana | PN isina kukwana synergy | Wedzera MCA (kusvika 6%) kana aluminium hypophosphite (kusvika 15%) |
V. Alternative Formulation (Kana Zvichidiwa)
Tsiva chikamu cheAPP nezvinobva muDOPO (semuenzaniso, DOPO-HQ):
- 8% DOPO-HQ + 10% aluminium hypophosphite inoderedza kurongeka kwese (~ 18%) paunenge uchichengetedza kushanda.
Musanganiswa uyu unoyera kunonoka kwemurazvo, kuchengetedzwa kwezvakatipoteredza, uye kutonhora kwakanyanya. Zviyedzo zvidiki-zvidiki (500g) zvinokurudzirwa pamberi pekugadzirwa kwakazara.
More info., pls contact lucy@taifeng-fr.com
Nguva yekutumira: Jul-25-2025
