Rubutun Harshen Harshen-Retardant Formulation don Thermosetting Acrylic Adhesive
Don saduwa da buƙatun masu kare harshen wuta na UL94 V0 don adhesives na acrylic thermosetting, la'akari da halaye na ci gaban harshen wuta da ƙayyadaddun tsarin thermosetting, ana ba da shawarar ingantaccen tsari da mahimman bincike:
I. Ƙa'idodin Ƙirƙirar Ƙirƙira & Bukatun Tsarin Tsarin zafi
- Dole ne ya dace da zafin jiki (yawanci 120-180 ° C)
- Masu ɗaukar harshen wuta dole ne su yi tsayayya da sarrafa zafin jiki mai zafi (guje wa gazawar bazuwar)
- Tabbatar da kwanciyar hankali tarwatsawa a cikin babban tsarin haɗin giciye
- Daidaita ƙarfin injin bayan warkewa da ingancin jinkirin harshen wuta
II. Zane-zanen Tsare-tsare na Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarfafawa
Ayyukan Retardant na Harshe & Daidaituwar Thermoset
| Mai hana wuta | Matsayin Farko | Daidaitawar Thermoset | An Shawarar Loading |
|---|---|---|---|
| Mafi kyawun ATH | Babban FR: Rashin ruwa na endothermic, dilution na gas-lokaci | Yana buƙatar gyaran ƙasa (anti-agglomeration) | ≤35% (yawan lodi yana rage haɗin kai) |
| Aluminum hypophosphite | Synergist: Char catalyst, m scavenger (PO ·) | Decomp. temp. > 300 ° C, dace da warkewa | 8-12% |
| Zinc borate | Haɓaka Char: Yana samar da shingen gilashi, yana rage hayaki | Yana aiki tare da ATH (Al-BO char) | 5-8% |
| Melamine cyanurate (MCA) | Gas-lokaci FR: Yana sakin NH₃, yana hana konewa | Decomp. temp. 250-300C (zazzabi. <250°C) | 3-5% |
III. Nasihar Tsarin (Nauyi %)
Jagororin Sarrafa Sashe
| Bangaren | Rabo | Bayanan Gudanarwa Maɓalli |
|---|---|---|
| Thermoset acrylic guduro | 45-50% | Nau'in ƙarancin danko (misali, epoxy acrylate) don babban lodin filler |
| ATH da aka gyara saman (D50 <5µm) | 25-30% | An riga an yi magani tare da KH-550 silane |
| Aluminum hypophosphite | 10-12% | An riga an haɗa shi da ATH, an ƙara shi cikin batches |
| Zinc borate | 6-8% | Ƙara tare da MCA; guje wa lalata mai girma |
| MCA | 4-5% | Haɗin ƙananan-ƙara-ƙara (<250°C) |
| Mai watsawa (BYK-2152 + PE wax) | 1.5-2% | Yana tabbatar da tarwatsewar filler iri ɗaya |
| Wakilin haɗin kai (KH-550) | 1% | An riga an yi magani akan ATH/hypophosphite |
| Wakilin Curing (BPO) | 1-2% | Mai kunnawa ƙarancin zafi don saurin warkewa |
| Wakilin Anti-setling (Aerosil R202) | 0.5% | Thixotropic anti-sedimentation |
IV. Mahimman Tsarin Gudanarwa
1. Tsarin Watsawa
- Pre-jiyya: ATH & hypophosphite jiƙa a cikin 5% KH-550 / ethanol bayani (2h, 80 ° C bushewa)
- Jerin hadawa:
- Resin + dispersant → Haɗin ƙananan sauri → Ƙara ATH/hypophosphite da aka gyara → Watsawa mai sauri (2500 rpm, 20 min) → Ƙara zinc borate / MCA → Haɗin ƙananan sauri (guje wa lalata MCA)
- Kayan aiki: Mai haɗawa ta Duniya (Vacuum degassing) ko injin mirgine uku (don ultrafine powders)
2. Magance Ingantawa
- Maganin mataki: 80°C/1h (pre-gel) → 140°C/2h (maganin bayan warkewa, guje wa ruɓewar MCA)
- Ikon matsi: 0.5-1 MPa don hana daidaitawar filler
3. Hanyoyin Haɗin kai
- ATH + Hypophosphite: Yana Samar da AlPO₄-ƙarfafa caja yayin da ake lalata masu tsattsauran ra'ayi (PO·)
- Zinc borate + MCA: Gas mai ƙarfi biyu shinge (NH₃ dilution + narkakken gilashin gilashi)
V. Dabarun Tuna Ayyuka
Batutuwa gama gari & Magani
| Batu | Tushen Dalili | Magani |
|---|---|---|
| Ƙunƙarar wuta | Low narke danko | Ƙara MCA zuwa 5% + hypophosphite zuwa 12%, ko ƙara 0.5% PTFE micropowder |
| Bayan-cure brittleness | Yawan lodin ATH | Rage ATH zuwa 25% + 5% nano-CaCO₃ (tauri) |
| Ajiye lalata | Talauci thixotropy | Ƙara silica zuwa 0.8% ko canza zuwa BYK-410 |
| LOI <28% | Rashin isassun gas-lokaci FR | Ƙara 2% mai rufi jan phosphorus ko 1% nano-BN |
VI. Ma'aunin Tabbatarwa
- UL94 V0: 3.2 mm samfurori, jimlar lokacin harshen wuta <50 s (babu ƙonewa auduga)
- LOI ≥30% (taɓar aminci)
- ragowar TGA>25% (800°C, N₂)
- Ma'auni na inji: Ƙarfin ƙarfi> 8 MPa, ƙarfin ƙarfi> 6 MPa
Key Takeaways
- Ya sami ƙimar V0 yayin kiyaye amincin injina.
- Gwajin ƙanana (50g) an ba da shawarar kafin a yi sikeli.
- Don mafi girman aiki: 2-3% abubuwan DOPO (misali, phosphaphenanthrene) ana iya ƙarawa.
Wannan tsari yana tabbatar da bin ka'idoji masu tsauri da harshen wuta yayin inganta iya aiki da aikin amfani na ƙarshe.
Lokacin aikawa: Jul-01-2025
