Reference Flame-Retardant Foromo bakeng sa Thermosetting Acrylic Adhesive
Ho fihlela litlhoko tse thibelang malakabe a UL94 V0 bakeng sa likhomaretsi tsa acrylic tsa thermosetting, ho nahanoa ka litšoaneleho tsa li-retardants tse teng tsa malakabe le lintlha tse ikhethang tsa sistimi ea thermosetting, ho etsoa tlhahiso e ntlafalitsoeng e latelang le tlhahlobo ea bohlokoa:
I. Melao-motheo ea Moralo oa Tlhahiso le Litlhoko tsa Tsamaiso ea Thermosetting
- E tlameha ho lumellana le mocheso oa ho folisa (ka tloaelo 120-180 ° C)
- Li-retardants tsa lelakabe li tlameha ho mamella ts'ebetso ea mocheso o phahameng (qoba ho hloleha ho bola)
- Etsa bonnete ba botsitso ba ho hasana lits'ebetsong tse phahameng tsa crosslink-density
- Leka-lekanya matla a mochini ka mor'a pheko le ts'ebetso ea ho lieha ho sebetsa ha malakabe
II. Synergistic Flame-Retardant System Design
Lits'ebetso tsa Flame Retardant & Tšebelisano ea Thermoset
| Lelakabe le Retardant | Karolo ea mantlha | Tšebelisano ea Thermoset | Recommended Loading |
|---|---|---|---|
| ATH e ntle haholo | Main FR: Endothermic dehydration, khase-phase dilution | E hloka phetoho ea bokaholimo (anti-agglomeration) | ≤35% (ho jara ho feteletseng ho fokotsa khokahano) |
| Hypophosphite ea aluminium | Synergist: Char catalyst, radical scavenger (PO·) | Hlakola. temp. >300°C, e loketseng ho phekolwa | 8–12% |
| Zinc borate | Sehlahisoa sa Char: Se etsa mokoallo oa khalase, se fokotsa mosi | E tsamaisana le ATH (Al-BO char) | 5–8% |
| MCA (Melamine cyanrate) | Gas-phase FR: E lokolla NH₃, e thibela ho tuka | Hlakola. temp. 250–300°C (mocheso oa ho folisa. <250°C) | 3–5% |
III. Tlhahiso e khothalelitsoeng (Boima ba 'mele %)
Litaelo tsa Ts'ebetso ea Karolo
| Karolo | Karolelano | Lintlha tsa Ts'ebetso ea Bohlokoa |
|---|---|---|
| Thermoset acrylic resin | 45–50% | Mofuta o tlase oa viscosity (mohlala, epoxy acrylate) bakeng sa ho kenya li-filler tse phahameng |
| ATH e fetotsoeng holimo (D50 <5µm) | 25–30% | E phekoloa esale pele ka KH-550 silane |
| Hypophosphite ea aluminium | 10–12% | E kopantsoe pele le ATH, e kenyellelitsoe ka lihlopha |
| Zinc borate | 6–8% | E kenyellelitsoe le MCA; qoba ho senyeha ha sekoere se phahameng |
| MCA | 4–5% | Motsoako oa morao-rao oa lebelo le tlase (<250°C) |
| Dispersant (BYK-2152 + PE wax) | 1.5–2% | E netefatsa phallo e tšoanang ea li-filler |
| Coupling agent (KH-550) | 1% | E phekotsoe pele ho ATH/hypophosphite |
| Moemeli oa pheko (BPO) | 1–2% | Sesebelisoa sa mocheso o tlase bakeng sa ho phekola kapele |
| Anti-settlement agent (Aerosil R202) | 0.5% | Thixotropic anti-sedimentation |
IV. Litaolo tsa Ts'ebetso e Bohlokoa
1. Mokhoa oa ho hasana
- Kalafo ea pele: ATH & hypophosphite e kolobisitsoe ka 5% KH-550/thanol solution (2h, 80°C drying)
- Ho kopanya tatelano:
- Resin + dispersant → Ho kopanya ka lebelo le tlase → Eketsa ATH/hypophosphite e fetotsoeng → Phatlalatso ea lebelo le phahameng (2500 rpm, 20 min) → Eketsa zinc borate/MCA → Ho kopanya ka lebelo le tlase (qoba ho senyeha ha MCA)
- Thepa: Motsoako oa lipolanete (vacuum degassing) kapa leloala la li-roll tse tharo (bakeng sa phofo ea ultrafine)
2. Pheliso e Molemo
- Mohato oa ho folisa: 80°C/1h (pele ho gel) → 140°C/2h (kamora pheko, qoba ho bola ha MCA)
- Taolo ea khatello: 0.5-1 MPa ho thibela ho lula ha li-filler
3. Mekhoa ea Synergistic
- ATH + Hypophosphite: E theha char e matlafalitsoeng ke AlPO₄ ha e ntse e hlakola li-radicals (PO·)
- Zinc borate + MCA: Sethibelo se tiileng sa khase (NH₃ dilution + lera la khalase e qhibilihisitsoeng)
V. Maano a Tokiso ea Ts'ebetso
Mathata a Tloaelehileng le Litharollo
| Hlahisa | Sesosa sa ho qala | Tharollo |
|---|---|---|
| Motumo o rothang | Viscosity e qhibilihang e tlase | Eketsa MCA ho isa ho 5% + hypophosphite ho isa ho 12%, kapa eketsa 0.5% PTFE micropowder |
| brittleness ka mor'a phekolo | Ho kenya ATH ho feteletseng | Fokotsa ATH ho 25% + 5% nano-CaCO₃ (e thatafatsang) |
| Sedimentation ea polokelo | Mafutsana thixotropy | Eketsa silica ho 0.8% kapa switjha ho BYK-410 |
| LOI <28% | Karolo e sa lekaneng ea khase FR | Eketsa 2% e koahetsoeng ka phosphorus e khubelu kapa 1% nano-BN |
VI. Metrics ea netefatso
- UL94 V0: 3.2 limilimithara disampole, kakaretso ea nako ea lelakabe <50 s (ha ho motenya oa k'hothone)
- LOI ≥30% (safety margin)
- Masala a TGA >25% (800°C, N₂)
- Tekanyo ea mochine: Matla a ho tsitsa > 8 MPa, matla a ho kuta > 6 MPa
Lintlha tsa bohlokoa
- E fihlella lintlha tsa V0 ha o ntse o boloka botšepehi ba mochini.
- Liteko tse nyane (50g) li khothalelitsoe pele ho sekhahla.
- Bakeng sa ts'ebetso e phahameng: 2-3% derivatives ea DOPO (mohlala, phosphaphenanthrene) e ka eketsoa.
Moetso ona o netefatsa ho tsamaellana le litekanyetso tse thata tse thibelang lelakabe ha o ntse o ntlafatsa ts'ebetso le ts'ebetso ea ho qetela.
Nako ea poso: Jul-01-2025
