Ireferensi Ukwakhiwa Kwe-Flame-Retardant Ye-Thermosetting Acrylic Adhesive
Ukuze kuhlangatshezwane nezidingo ze-UL94 V0 ze-flame-retardant zokunamathisela i-acrylic thermosetting, uma kucutshungulwa izici zamalangabi akhona kanye nokucaciswa kwezinhlelo ze-thermosetting, ukwakheka okulandelayo okuthuthukisiwe nokuhlaziya okubalulekile kuhlongozwayo:
I. Izimiso Zokuklama Ukwakhiwa kanye Nezimfuneko Zesistimu Yokusetha I-thermosetting
- Kumelwe kufane nezinga lokushisa lokwelapha (imvamisa engu-120–180°C)
- Ama-flame retardants kumele amelane nokucutshungulwa kwezinga lokushisa eliphezulu (ugweme ukwehluleka ukubola)
- Qinisekisa ukuzinza kokuhlakazeka kumasistimu aphezulu we-crosslink-density
- Linganisa amandla emishini angemuva kokwelapha kanye nokusebenza kahle kokuncipha komlilo
II. I-Synergistic Flame-Retardant System Design
Imisebenzi Ye-Flame Retardant & Ukuhambelana kwe-Thermoset
| I-Flame Retardant | Indima Eyinhloko | Ukuhambisana kwe-Thermoset | Kunconyiwe Kuyalayisha |
|---|---|---|---|
| Inani eliphakeme kakhulu lama-ATH | I-FR Eyinhloko: Ukuphelelwa amanzi emzimbeni kwe-Endothermic, i-gas-phase dilution | Idinga ukuguqulwa kwendawo (anti-agglomeration) | ≤35% (ukulayisha ngokweqile kunciphisa ukuxhumanisa) |
| I-aluminium hypophosphite | I-Synergist: I-Char catalyst, i-radical scavenger (PO·) | Decomp. isikhashana. >300°C, ilungele ukwelapha | 8–12% |
| I-Zinc borate | Isithuthukisi se-Char: Sakha umgoqo oyingilazi, sinciphisa intuthu | Isebenzisana ne-ATH (Al-BO char) | 5–8% |
| I-MCA (i-Melamine cyanrate) | I-Gas-phase FR: Ikhipha i-NH₃, ivimbela ukusha | Decomp. isikhashana. 250–300°C (izinga lokushisa elingaphansi kuka-250°C) | 3–5% |
III. Ukwakhiwa Okunconyiwe (Isisindo %)
Imihlahlandlela Yokucubungula Ingxenye
| Isakhi | Isilinganiso | Amanothi Okucubungula Okubalulekile |
|---|---|---|
| I-Thermoset acrylic resin | 45–50% | Uhlobo lwe-viscosity ephansi (isb, i-epoxy acrylate) yokulayisha isigcwalisi esiphezulu |
| I-Surface-modified ATH (D50 <5µm) | 25–30% | Ilashwe ngaphambilini nge-KH-550 silane |
| I-aluminium hypophosphite | 10–12% | Ihlanganiswe ngaphambilini ne-ATH, yengezwe ngamaqoqo |
| I-Zinc borate | 6–8% | Kwengezwe ne-MCA; gwema ukucekelwa phansi kwe-high-shear |
| I-MCA | 4–5% | Ukuxutshwa kwesivinini esiphansi kwesigaba sakamuva (<250°C) |
| I-Disperant (BYK-2152 + PE wax) | 1.5–2% | Iqinisekisa ukuhlakazwa kwe-filler efanayo |
| I-ejenti yokuhlanganisa (KH-550) | 1% | Yelashwe ngaphambilini nge-ATH/hypophosphite |
| I-ejenti yokwelapha (BPO) | 1–2% | I-activator yezinga eliphansi lokwelapha ngokushesha |
| I-Anti-settleling agent (Aerosil R202) | 0.5% | Thixotropic anti-sedimentation |
IV. Izilawuli Zenqubo Ebalulekile
1. Inqubo Yokuhlakazeka
- Ukwelashwa kwangaphambili: I-ATH ne-hypophosphite efakwe ku-5% KH-550/ethanol solution (2h, 80°C ukomiswa)
- Ukuhlanganisa ukulandelana:
- I-Resin + dispersant → Ukuhlanganisa isivinini esiphansi → Engeza i-ATH/hypophosphite elungisiwe → Ukuhlakazeka kwesivinini esikhulu (2500 rpm, 20 min) → Engeza i-zinc borate/MCA → Ukuhlanganisa isivinini esiphansi (gwema ukuwohloka kwe-MCA)
- Izisetshenziswa: I-Planetary mixer (vacuum degassing) noma isigayo esinama-roll amathathu (ama-ultrafine powders)
2. Ukuthuthukisa Ukwelapha
- Isinyathelo sokwelapha: 80°C/1h (pre-gel) → 140°C/2h (ngemuva kokwelapha, gwema ukubola kwe-MCA)
- Ukulawula ukucindezela: 0.5–1 MPa ukuvimbela ukumiswa kokugcwalisa
3. Izindlela Zokusebenzisana
- I-ATH + Hypophosphite: Yakha i-char eqiniswe yi-AlPO₄ ngenkathi ikhipha ama-radicals (PO·)
- I-Zinc borate + MCA: Isithiyo esikabili esiyigesi esiqinile (NH₃ dilution + ungqimba lwengilazi oluncibilikisiwe)
V. Amasu Okushuna Ukusebenza
Izinkinga Ezivamile Nezixazululo
| Inkinga | Imbangela | Isixazululo |
|---|---|---|
| Ukushisa okuconsisayo | I-viscosity encibilikayo ephansi | Khulisa i-MCA iye ku-5% + i-hypophosphite iye ku-12%, noma engeza i-micropowder engu-0.5% ye-PTFE |
| I-post-cure brittleness | Ilayisha kakhulu i-ATH | Yehlisa i-ATH iye ku-25% + 5% nano-CaCO₃ (iyaqinisa) |
| Isitoreji sedimentation | I-thixotropy empofu | Khulisa i-silica ibe ngu-0.8% noma ushintshele ku-BYK-410 |
| I-LOI <28% | Isigaba segesi esinganele FR | Engeza u-2% we-phosphorus ebomvu eboshwe noma u-1% we-nano-BN |
VI. Amamethrikhi okuqinisekisa
- UL94 V0: amasampula angu-3.2 mm, isikhathi selangabi esiphelele <50 s (akukho okokuthungela ukotini)
- I-LOI ≥30% (imajini yokuphepha)
- Izinsalela ze-TGA >25% (800°C, N₂)
- Ibhalansi yomshini: Amandla aqinile >8 MPa, amandla okugunda > 6 MPa
Okuthathwayo Okubalulekile
- Ifinyelela isilinganiso se-V0 ngenkathi igcina ubuqotho bomshini.
- Izivivinyo ezincane (50g) ezinconyiwe ngaphambi kokukala.
- Ngokusebenza okuphezulu: 2–3% okuphuma kokunye kwe-DOPO (isb, i-phosphaphenanthrene) kungengezwa.
Lokhu kwakhiwa kuqinisekisa ukuthobelana nezindinganiso eziqinile zokunqanda ilangabi kuyilapho kuthuthukiswa ukucutshungulwa nokusebenza kokusetshenziswa kokugcina.
Isikhathi sokuthumela: Jul-01-2025
