Isalathiso sokwenziwa kwe-Flame-Retardant ye-Thermosetting Acrylic Adhesive
Ukuhlangabezana neemfuno ze-UL94 V0 ze-flame-retardant ye-thermosetting acrylic adhesives, ngokuqwalasela iimpawu ze-flame retardants ezikhoyo kunye neenkcukacha ze-thermosetting systems, uqulunqo olulandelayo oluphuculweyo kunye nohlalutyo oluphambili lucetywayo:
I. Imigaqo yoYilo loCwangciso kunye neeMfuno zeNkqubo ye-Thermosetting
- Kufuneka ihambelane nobushushu bokunyanga (ngokuqhelekileyo 120–180°C)
- Iiretadants zomlilo kufuneka zimelane nokusetyenzwa kobushushu obuphezulu (ukuphepha ukusilela kokubola)
- Qinisekisa ukuzinza kokusasazwa kwiinkqubo eziphezulu zokuxinana kwe-crosslink
- Ulungelelaniso lwasemva kokunyanga amandla oomatshini kunye nokusebenza kakuhle kwedangatye
II. I-Synergistic Flame-Retardant System Design
Imisebenzi ye-Flame Retardant kunye ne-Thermoset Compatibility
| I-Flame Retardant | Indima yokuqala | Ukuhambelana kweThermoset | Kucetyiswa ukulayisha |
|---|---|---|---|
| I-ATH entle kakhulu | I-FR ephambili: Ukuchithwa kwe-Endothermic, i-gas-phase dilution | Ifuna ukulungiswa komphezulu (anti-agglomeration) | ≤35% (ukulayisha ngokugqithisileyo kunciphisa ukudibanisa) |
| I-aluminium hypophosphite | Synergist: Char catalyst, radical scavenger (PO·) | Decomp. ixesha. >300°C, ilungele ukunyanga | 8–12% |
| I-zinc borate | Isiphuculi seChara: Senza umqobo weglasi, sinciphisa umsi | Isebenzisana ne-ATH (Al-BO char) | 5–8% |
| I-MCA (iMelamine cyanurate) | I-Gas-phase FR: Ikhupha i-NH₃, inqanda ukutsha | Decomp. ixesha. 250–300°C (iqondo lobushushu lokunyanga <250°C) | 3–5% |
III. Ulwakhiwo oluCetyisiweyo (Ubunzima %)
IziKhokelo zokuLungiselela iCandelo
| Icandelo | Umlinganiselo | Amanqaku oLungiselelo olungundoqo |
|---|---|---|
| Thermoset acrylic resin | 45–50% | Uhlobo lwe-low-viscosity (umzekelo, i-epoxy acrylate) yokulayishwa kwesigcwalisi esiphezulu |
| Umphezulu-uguqulo lwe-ATH (D50 <5µm) | 25–30% | Ukunyangwa kwangaphambili nge-KH-550 silane |
| I-aluminium hypophosphite | 10–12% | Ixutywe kwangaphambili kunye ne-ATH, yongezwa kwiibhetshi |
| I-zinc borate | 6–8% | Yongezwe kunye ne-MCA; kuphephe ukuthotywa kwe-high-chear |
| MCA | 4–5% | Ukuxutywa kwexesha elisezantsi-ngesantya esisezantsi (<250°C) |
| I-Disperant (BYK-2152 + PE wax) | 1.5–2% | Uqinisekisa ukusasazwa kwefayili efanayo |
| I-arhente yokudibanisa (KH-550) | 1% | Ukunyangwa kwangaphambili kwi-ATH/hypophosphite |
| Iarhente yokunyanga (BPO) | 1–2% | I-activator yobushushu obuphantsi bokunyanga ngokukhawuleza |
| Iarhente yokuchasana nokuhlaliswa (Aerosil R202) | 0.5% | Thixotropic anti-sedimentation |
IV. Ulawulo lweNkqubo ebalulekileyo
1. Inkqubo yokusasazwa
- Unyango lwangaphambili: I-ATH kunye ne-hypophosphite efakwe kwi-5% KH-550 / isisombululo se-ethanol (2h, 80 ° C ukomisa)
- Ukudibanisa ulandelelwano:
- I-Resin + i-dispersant → isantya esisezantsi sokuxuba → Yongeza i-ATH/hypophosphite elungisiweyo → Ukusasazwa kwesantya esiphezulu (2500 rpm, 20 min) → Yongeza i-zinc borate/MCA → Ukuxuba okunesantya esisezantsi (kuphephe ukuthotywa kweMCA)
- Izixhobo: Umxubi wePlanethi (i-vacuum degassing) okanye i-three-roll mill (ye-ultrafine powders)
2. Ukunyangwa kokuPhuculwa
- Inyathelo lokunyanga: 80°C/1h (pre-gel) → 140°C/2h (emva kokunyanga, kunqandwe ukubola kwe-MCA)
- Ulawulo loxinzelelo: 0.5–1 MPa ukuthintela ukuhlaliswa kwesihluzi
3. IiNdlela zeSynergistic
- I-ATH + neHypophosphite: Yenza i-AlPO₄-yomeleze i-char ngelixa icoca iiradicals (PO·)
- I-Zinc borate + MCA: Isithintelo esiphindwe kabini segesi (NH₃ dilution + umaleko weglasi etyhidiweyo)
V. IziCwangciso zoTshintsho lweNtsebenzo
Imiba eqhelekileyo kunye nezisombululo
| Khupha | Unobangela weengcambu | Isisombululo |
|---|---|---|
| Umlilo ovuzayo | I-viscosity ephantsi yokunyibilika | Ukwandisa i-MCA ukuya kwi-5% + i-hypophosphite ukuya kwi-12%, okanye ungeze i-0.5% ye-PTFE micropowder |
| I-brittleness emva kokunyanga | Ukulayisha okugqithisileyo kwe-ATH | Yehlisa i-ATH ukuya kwi-25% + 5% nano-CaCO₃ (inzima) |
| Ukugcinwa kwentlenga | Ihlwempu thixotropy | Ukwandisa i-silica ukuya kwi-0.8% okanye utshintshe kwi-BYK-410 |
| LOI <28% | Ukungonelanga kwe-gas-phase FR | Yongeza i-2% efakwe i-phosphorus ebomvu okanye i-1% nano-BN |
VI. Iimetriki zoQinisekiso
- UL94 V0: 3.2 mm iisampulu, ixesha lomlilo lilonke <50 s (akukho mqhaphu uvuthayo)
- LOI ≥30% (umda wokhuseleko)
- TGA intsalela >25% (800°C, N₂)
- Ibhalansi yomatshini: Amandla okuqina > 8 MPa, amandla okucheba > 6 MPa
Izinto eziphambili zokuThatha
- Ukuphumelela ukulinganisa kwe-V0 ngelixa ugcina ingqibelelo yoomatshini.
- Ulingo oluncinci (50g) olucetyiswayo phambi kokukalwa.
- Ukusebenza okuphezulu: I-2-3% i-DOPO derivatives (umzekelo, i-phosphaphenanthrene) inokongezwa.
Olu qulunqo luqinisekisa ukuthotyelwa kwemigangatho engqongqo yokunqanda amadangatye ngelixa ulungiselela ukuqhubela phambili kunye nokusebenza kokuphela kokusetyenziswa.
Ixesha lokuposa: Jul-01-2025
