Reference Flame-Retardant Formulation for Thermosetting Acrylic Adhesive
Kuti mukwaniritse zofunikira za UL94 V0 zoletsa moto pa zomatira za acrylic za thermosetting, poganizira mawonekedwe a zotchingira moto zomwe zilipo komanso tsatanetsatane wamakina opangira ma thermosetting, kuwongolera kotereku ndi kusanthula kwakukulu kumaperekedwa:
I. Mfundo Zopangira Mapangidwe & Zofunikira pa Thermosetting System
- Iyenera kufanana ndi kutentha kwa machiritso (nthawi zambiri 120-180 ° C)
- Zotsalira zamoto ziyenera kupirira kutentha kwambiri (kupewa kuwonongeka kwa kuwonongeka)
- Onetsetsani kuti kukhazikika kwamwano m'makina apamwamba a crosslink-density
- Kusamala pambuyo pochiritsa mphamvu zamakina ndi kuchedwa kwamoto
II. Synergistic Flame-Retardant System Design
Flame Retardant Ntchito & Kugwirizana kwa Thermoset
| Flame Retardant | Udindo Woyambirira | Kugwirizana kwa Thermoset | Analimbikitsa Loading |
|---|---|---|---|
| Mtengo wapatali wa magawo ATH | Main FR: Endothermic dehydration, gasi-gawo dilution | Pamafunika kusinthidwa kwapamwamba (anti-agglomeration) | ≤35% (kutsitsa kwambiri kumachepetsa kulumikizana) |
| Aluminium hypophosphite | Synergist: Char catalyst, radical scavenger (PO·) | Decomp. temp. >300 ° C, oyenera kuchiritsa | 8-12% |
| Zinc borate | Chowonjezera mphamvu: Amapanga chotchinga chagalasi, chimachepetsa utsi | Imalumikizana ndi ATH (Al-BO char) | 5-8% |
| MCA (Melamine cyanrate) | Gas-phase FR: Imatulutsa NH₃, imalepheretsa kuyaka | Decomp. temp. 250-300 ° C (kuchiritsa kutentha. <250°C) | 3-5% |
III. Mapangidwe Ovomerezeka (Kulemera %)
Malangizo Opangira Magawo
| Chigawo | Chiŵerengero | Key Processing Notes |
|---|---|---|
| Thermoset acrylic utomoni | 45-50% | Mtundu wocheperako kwambiri (mwachitsanzo, epoxy acrylate) pakudzaza kodzaza kwambiri |
| ATH yosinthidwa pamwamba (D50 <5µm) | 25-30% | Zokonzedweratu ndi KH-550 silane |
| Aluminium hypophosphite | 10-12% | Zosakanikirana ndi ATH, zowonjezeredwa m'magulu |
| Zinc borate | 6-8% | Wowonjezera ndi MCA; pewani kumeta ubweya wambiri |
| MCA | 4-5% | Kusakaniza kochedwa kwambiri (<250°C) |
| Dispersant (BYK-2152 + PE sera) | 1.5-2% | Imawonetsetsa kubalalitsidwa kwa uniform filler |
| Coupling agent (KH-550) | 1% | Adathandizidwa kale ndi ATH/hypophosphite |
| Chithandizo (BPO) | 1-2% | Wothandizira kutentha pang'ono kuti achire mwachangu |
| Anti-kukhazikitsa (Aerosil R202) | 0.5% | Thixotropic anti-sedimentation |
IV. Zowongolera Zovuta Kwambiri
1. Njira Yobalalika
- Kuchiza: ATH & hypophosphite zoviikidwa mu 5% KH-550/ethanol solution (2h, 80°C kuyanika)
- Kusakaniza motsatizana:
- Resin + dispersant → Kusakaniza kothamanga kwambiri → Onjezani zosinthidwa za ATH/hypophosphite → Kubalalitsa kothamanga kwambiri (2500 rpm, 20 min) → Onjezani zinc borate/MCA → Kusakaniza kothamanga kwambiri (peŵani kuwonongeka kwa MCA)
- Zida: Chosakanizira cha mapulaneti (vacuum degassing) kapena mphero yama roll atatu (ya ufa wochuluka kwambiri)
2. Kukhathamiritsa Kuchiritsa
- Kuchiza: 80°C/1h (gel osakaniza) → 140°C/2h (pambuyo pochiritsa, pewani kuwonongeka kwa MCA)
- Kuwongolera kupanikizika: 0.5-1 MPa kuti mupewe kukhazikika kwa filler
3. Njira za Synergistic
- ATH + Hypophosphite: Amapanga char cholimbikitsidwa ndi AlPO₄ pamene akuwononga zowononga (PO·)
- Zinc borate + MCA: Chotchinga cholimba cha gasi (NH₃ dilution + wosanjikiza wagalasi wosungunuka)
V. Magwiridwe Tuning Strategies
Mavuto Wamba & Mayankho
| Nkhani | Choyambitsa | Yankho |
|---|---|---|
| Kuyatsa kodontha | Low Sungunulani mamasukidwe akayendedwe | Wonjezerani MCA mpaka 5% + hypophosphite kufika 12%, kapena onjezani 0.5% PTFE micropowder |
| Pambuyo pochiza brittleness | Kutsegula kwambiri kwa ATH | Chepetsani ATH kufika 25% + 5% nano-CaCO₃ (yolimba) |
| Kusungirako sedimentation | Osauka thixotropy | Wonjezerani silika mpaka 0.8% kapena sinthani ku BYK-410 |
| LOI <28% | Kusakwanira kwa gasi-gawo FR | Onjezani 2% yokutidwa phosphorous wofiira kapena 1% nano-BN |
VI. Miyezo Yotsimikizira
- UL94 V0: zitsanzo za 3.2 mm, nthawi yonse yamoto <50s (palibe thonje loyatsira)
- LOI ≥30% (malire achitetezo)
- TGA zotsalira > 25% (800°C, N₂)
- Kuyenda kwamakina: Kulimba kwamphamvu> 8 MPa, kumeta ubweya> 6 MPa
Zofunika Kwambiri
- Imakwaniritsa mavoti a V0 ndikusunga kukhulupirika kwamakina.
- Mayesero ang'onoang'ono (50g) amalimbikitsidwa musanawonjezere.
- Pakuchita bwino kwambiri: 2-3% zotumphukira za DOPO (mwachitsanzo, phosphaphenanthrene) zitha kuwonjezeredwa.
Kapangidwe kameneka kamapangitsa kuti azitsatiridwa ndi malamulo okhwima osagwiritsa ntchito malawi kwinaku akukhathamiritsa kuti zitheke komanso kugwiritsa ntchito komaliza.
Nthawi yotumiza: Jul-01-2025
