Ukwakhiwa Kwe-Halogen-Free Flame Retardant kanye Nobuchwepheshe Bokucubungula we-Epoxy Resin
Ikhasimende lifuna imvelo enobungani, i-halogen-free, kanye ne-heavy-metal-free flame retardant efanelekile i-epoxy resin enohlelo lokwelapha i-anhydride, edinga ukuthotshelwa kwe-UL94-V0. I-ejenti elaphayo kufanele ibe i-epoxy elapha izinga lokushisa eliphezulu ene-Tg engaphezu kuka-125°C, edinga ukuphulukiswa kokushisa ku-85–120°C nokusabela kancane ekamelweni lokushisa. Ngezansi ukwakheka okunemininingwane njengoba kucelwe ikhasimende.
I. Uhlelo Lokwenza I-Flame Retardant
1. Isistimu Yokubuyiswa Kwelangabi Eyinhloko: I-Phosphorus-Nitrogen Synergy
Ithebula Lolwazi Lokubuyiswa Kwamalangabi
| I-Flame Retardant | Indlela | Kunconyiwe Kuyalayisha | Ukuphawula |
|---|---|---|---|
| I-aluminium hypophosphite | I-condensed-phase flame retardancy, yakha ungqimba lwe-aluminium phosphate char | 10–15% | I-retardant yokuqala yomlilo, izinga lokushisa lokubola. > 300°C |
| I-Ammonium polyphosphate (APP) | I-Intumescent flame retardancy, ihambisana ne-aluminium hypophosphite | 5–10% | I-APP engamelana ne-Acid iyadingeka |
| I-Melamine cyanrate (MCA) | Umthombo we-nitrogen, uthuthukisa i-phosphorus synergy, ucindezela umusi | 3–5% | Yehlisa ukuconsa |
2. Ama-Axiliary Flame Retardants kanye nama-Synergists
Ithebula Lolwazi Lokusekela Amalangabi Okusizayo
| I-Flame Retardant | Indlela | Kunconyiwe Kuyalayisha | Ukuphawula |
|---|---|---|---|
| I-Zinc borate | Ithuthukisa ukwakheka kwe-char, icindezela ukukhanya kwangemuva | 2–5% | Amanani amaningi angase abambezele ukwelapha |
| I-aluminium hydroxide enhle | Ukupholisa i-Endothermic, ukucindezela intuthu | 5–8% | Lawula ukulayisha (ukugwema ukuncishiswa kwe-Tg) |
3. Ukwakhiwa Kwesibonelo (Isamba Esilayishwayo: 20–30%)
Ukwakhiwa Kwesisekelo (Kuhlobene Nengqikithi Yokuqukethwe Kweresin)
| Isakhi | Okuqukethwe (okuhlobene ne-resin) |
|---|---|
| I-aluminium hypophosphite | 12% |
| APP | 8% |
| I-MCA | 4% |
| I-Zinc borate | 3% |
| I-aluminium hydroxide | 5% |
| Inani Elilayishiwe | 32% (ilungiseka ibe ngu-25–30%) |
II. Izinyathelo Ezibalulekile Zokucubungula
1. Ukuxuba kanye Nokuhlakazeka
A. Ukwelashwa Kwangaphambili:
- I-aluminium eyomile i-hypophosphite, i-APP, ne-MCA ku-80°C amahora angu-2 (ivimbela ukumuncwa komswakama).
- Phatha ama-inorganic fillers (i-aluminium hydroxide, i-zinc borate) nge-ejenti yokuhlanganisa ye-silane (isb, i-KH-550).
B. Ukulandelana Kokuxuba:
- I-Epoxy resin + I-Flame retardants (60°C, inyakazisa ihora elingu-1)
- Engeza i-anhydride elaphayo (gcina izinga lokushisa lingaphansi kuka-80°C)
- I-vacuum degassing (-0.095 MPa, 30 min)
2. Inqubo Yokwelapha
Isinyathelo Sokwelapha (Ibhalansisa ukuzinza kwe-flame retardant kanye ne-Tg ephezulu):
- 85°C / 2h (ukuqalisa kancane, kunciphisa amabhamuza)
- 120°C / 2h (iqinisekisa ukusabela okuphelele kwe-anhydride)
- 150°C / 1h (inyusa ukuminyana kokuxhumanisa, Tg >125°C)
3. Amanothi Abalulekile
- Ukulawulwa kwe-viscosity: Uma i-viscosity iphezulu kakhulu, engeza i-epoxy diluent esebenzayo engu-5% (isb, AGE).
- Ukwelashwa okubambezelekile: Sebenzisa i-methylhexahydrophthalic anhydride (MeHHPA) noma wengeze u-0.2% 2-ethyl-4-methylimidazole (yehlisa ukusabela kwezinga lokushisa legumbi).
III. Ukuqinisekiswa Kokusebenza Nokulungiswa
1. Ukubambezeleka Kwelangabi:
- Ukuhlolwa kwe-UL94 V0 (ukujiya okungu-1.6mm): Qinisekisa ukuthi isikhathi sokushiswa <10 sec, akukho ukuconsa.
- Uma ihluleka: Nyusa i-aluminium hypophosphite (+3%) noma i-APP (+2%).
2. Ukusebenza Okushisayo:
- Ukuhlolwa kwe-DSC kwe-Tg: Uma i-Tg <125°C, yehlisa i-aluminium hydroxide (yehlisa i-Tg ngenxa yomphumela we-endothermic).
3. Izakhiwo zikaMechanical:
- Uma amandla e-flexural ehla, engeza i-nano-silica engu-1–2% ukuze uqiniswe.
IV. Izinkinga ezingaba khona nezisombululo
Ithebula Lezinkinga Ezingabusheshi Amalangabi Nezixazululo
| Inkinga | Imbangela | Isixazululo |
|---|---|---|
| Ukwelashwa okungaphelele | Ukumuncwa umswakama noma ukuphazamiseka kwe-pH okuvela kumalangabi omlilo | Izigcwalisi ezomile, sebenzisa i-APP engamelana ne-asidi |
| Ukugeleza kwe-resin okungalungile | Ukulayishwa kokugcwalisa okweqile | Yehlisa i-aluminium hydroxide ibe ngu-3% noma wengeze i-diluent |
| Ukwehluleka kwe-UL94 | I-PN synergy enganele | Khulisa i-MCA (kuya ku-6%) noma i-aluminium hypophosphite (kufika ku-15%) |
V. Okunye Ukwakhiwa (Uma Kudingeka)
Shintshanisa ingxenye ye-APP ngokuphuma kwe-DOPO (isb, i-DOPO-HQ):
- I-8% ye-DOPO-HQ + i-10% ye-aluminium hypophosphite inciphisa ukulayisha okuphelele (~ 18%) ngenkathi igcina ukusebenza.
Le nhlanganisela ilinganisa ukuncipha komlilo, ukuphepha kwemvelo, nokusebenza kwezinga lokushisa eliphezulu. Izivivinyo ezincane (500g) ziyanconywa ngaphambi kokukhiqiza okuphelele.
More info., pls contact lucy@taifeng-fr.com
Isikhathi sokuthumela: Jul-25-2025
