Itọkasi ina-Retardant agbekalẹ fun Thermosetting Akiriliki alemora
Lati pade awọn ibeere idaduro ina UL94 V0 fun awọn adhesives akiriliki thermosetting, ni imọran awọn abuda ti awọn idaduro ina ti o wa ati awọn pato ti awọn eto thermosetting, ilana iṣapeye atẹle ati itupalẹ bọtini ni a dabaa:
I. Awọn Ilana Apẹrẹ Fọọmu & Awọn ibeere System Thermosetting
- Gbọdọ baamu iwọn otutu imularada (deede 120-180°C)
- Awọn idapada ina gbọdọ duro si ṣiṣe iwọn otutu giga (yago fun ikuna jijẹ)
- Rii daju iduroṣinṣin pipinka ni awọn ọna agbekọja-iwuwo giga
- Ṣe iwọntunwọnsi agbara ẹrọ iwosan lẹhin-iwosan ati ṣiṣe idaduro ina
II. Synergistic ina-Retardant System Design
Awọn iṣẹ Idaduro Ina & Ibamu Thermoset
| Ina Retardant | Ipa akọkọ | Thermoset Ibamu | Niyanju ikojọpọ |
|---|---|---|---|
| Ultra-itanran ATH | Main FR: Endothermic gbígbẹ, gaasi-alakoso fomipo | Nilo iyipada oju ilẹ (egboogi-agglomeration) | ≤35% (ikojọpọ ti o pọ julọ dinku ọna asopọ) |
| Aluminiomu hypophosphite | Amuṣiṣẹpọ: Char catalyst, radical scavenger (PO·) | Decomp. iwọn otutu. > 300 ° C, o dara fun imularada | 8–12% |
| Zinc borate | Imudara Char: Fọọmu idena gilasi, dinku ẹfin | Ṣiṣẹpọ pẹlu ATH (Al-BO char) | 5–8% |
| MCA (Melamine cyanurate) | Gas-phase FR: Tu NH₃ silẹ, ṣe idiwọ ijona | Decomp. iwọn otutu. 250–300°C (iwọn otutu. <250°C) | 3–5% |
III. Ilana ti a ṣe iṣeduro (Iwọn%)
Awọn Itọsọna Ilana Ṣiṣe Ẹka
| Ẹya ara ẹrọ | Ipin | Awọn akọsilẹ Ṣiṣe bọtini |
|---|---|---|
| Thermoset akiriliki resini | 45–50% | Iru iki-kekere (fun apẹẹrẹ, acrylate iposii) fun ikojọpọ kikun kikun |
| ATH ti a ṣe atunṣe-oju (D50 <5µm) | 25–30% | Ti ṣe itọju pẹlu KH-550 silane |
| Aluminiomu hypophosphite | 10–12% | Ti a dapọ pẹlu ATH, fi kun ni awọn ipele |
| Zinc borate | 6–8% | Fi kun pẹlu MCA; yago fun ga-rẹ-rẹ ibajẹ |
| MCA | 4–5% | Idapọ iyara kekere ti ipele pẹ (<250°C) |
| Pipin (BYK-2152 + PE epo) | 1.5–2% | Ṣe idaniloju pipinka kikun kikun aṣọ |
| Aṣoju idapọ (KH-550) | 1% | Ti ṣe itọju tẹlẹ lori ATH/hypophosphite |
| Aṣoju imularada (BPO) | 1–2% | Akitiyan otutu-kekere fun yara imularada |
| Aṣoju ilodi si (Aerosil R202) | 0.5% | Thixotropic egboogi-sedimentation |
IV. Lominu ni ilana idari
1. Ilana pipinka
- Itọju iṣaaju: ATH & hypophosphite ti a fi sinu 5% KH-550/ethanol ojutu (2h, 80°C gbigbe)
- Ọwọ̀n àkópọ̀:
- Resini + dispersant → Dapọ iyara-kekere → Ṣafikun ATH/hypophosphite ti a ti yipada → pipinka iyara giga (2500 rpm, 20 min) → Ṣafikun borate zinc/MCA → idapọ iyara kekere (yago fun ibajẹ MCA)
- Ohun elo: Alapọpo Planetary (vacuum degassing) tabi ọlọ ọlọ mẹta (fun awọn erupẹ ultrafine)
2. Curing Iṣapeye
- Itọju igbesẹ: 80°C/1h (jeli-tẹlẹ) → 140°C/2h (itọju lẹhin-itọju, yago fun ibajẹ MCA)
- Iṣakoso titẹ: 0.5-1 MPa lati ṣe idiwọ atunṣe kikun
3. Synergistic Mechanisms
- ATH + Hypophosphite: Fọọmu AlPO₄-ẹba ti a fi agbara mu lakoko ti o npa awọn radicals (PO·)
- Zinc borate + MCA: Gas-solid meji idankan (dilution NH₃ + Layer gilaasi didà)
V. Awọn ilana Tuning Performance
Awọn ọrọ ti o wọpọ & Awọn ojutu
| Oro | Gbongbo Fa | Ojutu |
|---|---|---|
| Imudanu sisọ | Kekere yo iki | Mu MCA pọ si 5% + hypophosphite si 12%, tabi ṣafikun 0.5% micropowder PTFE |
| Post-ni arowoto brittleness | Ikojọpọ ATH ti o pọju | Din ATH si 25% + 5% nano-CaCO₃ (toughing) |
| Imudani ipamọ | Ti ko dara thixotropy | Mu siliki pọ si 0.8% tabi yipada si BYK-410 |
| LOI <28% | Aipe gaasi-alakoso FR | Ṣafikun 2% irawọ owurọ pupa ti a bo tabi 1% nano-BN |
VI. Awọn Metiriki afọwọsi
- UL94 V0: 3.2 mm awọn ayẹwo, lapapọ akoko ina <50 s (ko si iginisonu owu)
- LOI ≥30% (ala aabo)
- Iyoku TGA>25% (800°C, N₂)
- Iwontunwonsi ẹrọ: Agbara fifẹ> 8 MPa, agbara rirẹ> 6 MPa
Awọn gbigba bọtini
- Ṣe aṣeyọri igbelewọn V0 lakoko mimu iduroṣinṣin ẹrọ.
- Awọn idanwo iwọn-kekere (50g) ti a ṣe iṣeduro ṣaaju iwọn.
- Fun iṣẹ ṣiṣe ti o ga julọ: 2–3% awọn itọsẹ DOPO (fun apẹẹrẹ, phosphaphenanthrene) le ṣe afikun.
Ilana yii ṣe idaniloju ibamu pẹlu awọn iṣedede ina-idaduro ina lakoko ti o nmu ilana ṣiṣe ati iṣẹ ṣiṣe opin-ipari.
Akoko ifiweranṣẹ: Jul-01-2025
