Kupanga kwa Halogen-Free Flame Retardant and Processing Technology ya Epoxy Resin
Makasitomala akufunafuna chowongolera zachilengedwe, chopanda halogen, komanso chotchingira moto chopanda chitsulo cholemera chomwe chili ndi utomoni wa epoxy wokhala ndi anhydride kuchiritsa, zomwe zimafuna kutsata kwa UL94-V0. Mankhwalawa ayenera kukhala ochiritsa kutentha kwa epoxy ndi Tg pamwamba pa 125 ° C, zomwe zimafuna kutentha kwa 85-120 ° C ndikuchita pang'onopang'ono kutentha kwa chipinda. Pansipa pali kufotokozedwa mwatsatanetsatane monga momwe kasitomala wafunsira.
I. Flame Retardant Formulation System
1. Core Flame Retardant System: Phosphorus-Nitrogen Synergy
Flame Retardant Information Table
| Flame Retardant | Njira | Analimbikitsa Loading | Ndemanga |
|---|---|---|---|
| Aluminium hypophosphite | Condensed-phase flame retardancy, imapanga aluminium phosphate char layer | 10-15% | Kutentha koyambirira kwa moto, kutentha kwa kutentha. >300°C |
| Ammonium polyphosphate (APP) | Kuchedwa kwamoto kwa intumescent, kumagwirizanitsa ndi aluminium hypophosphite | 5-10% | APP yosamva acid ndiyofunikira |
| Melamine cyanrate (MCA) | Gwero la nayitrogeni, limawonjezera phosphorous synergy, limachepetsa utsi | 3-5% | Amachepetsa kudontha |
2. Othandizira Flame Retardants ndi Synergists
Table Yachidziwitso cha Flame Retardants
| Flame Retardant | Njira | Analimbikitsa Loading | Ndemanga |
|---|---|---|---|
| Zinc borate | Imalimbikitsa mapangidwe a char, imachepetsa kuwala | 2-5% | Kuchuluka kwambiri kungachedwetse kuchira |
| Aluminiyamu yabwino hydroxide | Kuzizira kwa Endothermic, kuponderezedwa kwa utsi | 5-8% | Kuwongolera kutsitsa (kupewa kuchepetsa Tg) |
3. Kupanga Zitsanzo (Total Loading: 20–30%)
Mapangidwe a Base (Mogwirizana ndi Zonse za Utomoni)
| Chigawo | Zomwe zili (zogwirizana ndi Resin) |
|---|---|
| Aluminium hypophosphite | 12% |
| APP | 8% |
| MCA | 4% |
| Zinc borate | 3% |
| Aluminiyamu hydroxide | 5% |
| Total Loading | 32% (zosinthidwa kukhala 25-30%) |
II. Masitepe Ofunika Kwambiri
1. Kusakaniza ndi kubalalitsidwa
A. Kuchiza:
- Dry aluminium hypophosphite, APP, ndi MCA pa 80 ° C kwa maola 2 (amalepheretsa kuyamwa kwa chinyezi).
- Thirani zodzaza ndi ma inorganic fillers (aluminium hydroxide, zinki borate) ndi silane coupling agent (monga, KH-550).
B. Kusakaniza Kutsata:
- Epoxy resin + Flame retardants (60 ° C, yambitsani kwa 1h)
- Onjezani mankhwala a anhydride (sungani kutentha kosakwana 80 ° C)
- Kuchotsa mpweya (-0.095 MPa, 30 min)
2. Kuchiritsa Njira
Kuchiritsa kwa Khwerero (Kulinganiza kukhazikika kwamoto komanso Tg yayikulu):
- 85 ° C / 2h (kuyambitsa pang'onopang'ono, kumachepetsa thovu)
- 120 ° C / 2h (amawonetsetsa kuti anhydride azichita)
- 150 ° C / 1h (imawonjezera kachulukidwe kolumikizana, Tg> 125 ° C)
3. Mfundo Zazikulu
- Kuwongolera kukhuthala: Ngati mamasukidwe akayendedwe ndi okwera kwambiri, onjezani 5% reactive epoxy diluent (mwachitsanzo, AGE).
- Kuchedwetsa kuchiritsa: Gwiritsani ntchito methylhexahydrophthalic anhydride (MeHHPA) kapena onjezerani 0.2% 2-ethyl-4-methylimidazole (imachepetsa kutentha kwa chipinda).
III. Kutsimikizira Kuchita & Kusintha
1. Kuchedwa kwa Flame:
- Mayeso a UL94 V0 (1.6mm makulidwe): Onetsetsani kuti nthawi yoyaka <10 sec, palibe kudontha.
- Ngati zilephera: Wonjezerani aluminium hypophosphite (+3%) kapena APP (+2%).
2. Kutentha Kwambiri:
- Mayeso a DSC a Tg: Ngati Tg <125°C, chepetsani aluminium hydroxide (imachepetsa Tg chifukwa cha endothermic effect).
3. Katundu Wamakina:
- Ngati flexural mphamvu ikutsika, onjezerani 1-2% nano-silica kuti mulimbikitse.
IV. Mavuto Otheka & Mayankho
Flame Retardant Issues & Solutions Table
| Nkhani | Chifukwa | Yankho |
|---|---|---|
| Kuchiza kosakwanira | Kuyamwa kwachinyontho kapena kusokoneza pH kuchokera ku zoletsa moto | Zodzaza zowuma, gwiritsani ntchito APP yosamva acid |
| Kusayenda bwino kwa utomoni | Kudzaza mochulukira | Chepetsani aluminium hydroxide mpaka 3% kapena onjezerani diluent |
| Kulephera kwa UL94 | PN synergy yosakwanira | Wonjezerani MCA (mpaka 6%) kapena aluminium hypophosphite (mpaka 15%) |
V. Njira Zina (Ngati Zikufunika)
Sinthani gawo la APP ndi zotumphukira za DOPO (mwachitsanzo, DOPO-HQ):
- 8% DOPO-HQ + 10% aluminium hypophosphite imachepetsa kutsitsa kwathunthu (~ 18%) pamene ikugwira ntchito.
Kuphatikizikaku kumalinganiza kuchedwa kwa lawi, chitetezo cha chilengedwe, komanso kutentha kwambiri. Mayesero ang'onoang'ono (500g) amalimbikitsidwa asanapangidwe kwathunthu.
More info., pls contact lucy@taifeng-fr.com
Nthawi yotumiza: Jul-25-2025
