Ntụaka ire ọkụ-Retardant Formulation maka Thermosetting Acrylic Adhesive
Iji mezuo ihe UL94 V0 ire-retarant chọrọ maka acrylic adhesives thermosetting, na-atụle njirimara nke ndị na-ere ọkụ dị ugbu a na nkọwapụta nke sistemu okpomọkụ, a na-atụpụta usoro kachasị mma na nyocha isi:
I. Ụkpụrụ Nhazi Nhazi & Ihe achọrọ Sistemụ Thermosetting
- Okpomọkụ ọgwụgwọ kwesịrị dakọtara (ọ na-adịkarị 120-180 Celsius C).
- Ndị na-ere ọkụ ga-anagide nhazi okpomọkụ dị elu (zenarị ọdịda ire ere)
- Gbaa mbọ hụ na nkwụsi ike nke mgbasa na sistemụ njupụta dị elu
- Hazie ike n'ịgwọ ọrịa na arụ ọrụ ire ere
II. Imepụta Sistemụ Ọkụ Na-egbochi Mmekọ
Ọrụ na-egbochi ire ọkụ & ndakọrịta Thermoset
| Ọkụ na-egbochi ọkụ | Ọrụ izizi | Ndakọrịta Thermoset | Nbudata akwadoro |
|---|---|---|---|
| ATH kacha mma | Main FR: Endothermic akpịrị ịkpọ nkụ, mgbaze na-adọ gas | Na-achọ mgbanwe elu (mgbochi agglomeration) | ≤35% (oke ibu na-ebelata crosslinking) |
| Aluminom hypophosphite | Onye mmekọ: Char catalyst, radical scavenger (PO·) | Decomp. temp. > 300C, dị mma maka ọgwụgwọ | 8-12% |
| Zinc borate | Char enhancer: Na-emepụta ihe mgbochi enyo, na-ebelata anwụrụ ọkụ | Na-emekọrịta ihe na ATH (Al-BO char) | 5-8% |
| Melamine cyanurate (MCA) | Gas-phase FR: na-ewepụta NH₃, na-egbochi combustion | Decomp. temp. 250-300C (ọgwụgwọ okpomọkụ <250°C) | 3–5% |
III. Nhazi akwadoro (ibu %)
Ntuziaka nhazi akụkụ
| Akụkụ | Oke | Ndetu nhazi igodo |
|---|---|---|
| Thermoset acrylic resin | 45-50% | Ụdị viscosity dị ala (dịka ọmụmaatụ, epoxy acrylate) maka ibu ihe ndochi dị elu |
| ATH emegharịrị ihu (D50 <5µm) | 25-30% | Ejiri KH-550 silane mee ya nke ọma |
| Aluminom hypophosphite | 10-12% | Ejikọtara ya na ATH, agbakwunyere na batches |
| Zinc borate | 6–8% | Agbakwunyere na MCA; zere nbibi dị elu |
| MCA | 4–5% | Ngwakọta ọsọ dị obere oge ikpeazụ (<250°C) |
| Nkesa (BYK-2152 + PE wax) | 1.5-2% | Gbaa mbọ hụ na mgbasa ihe ndochi otu |
| Onye nnọchi anya njikọ (KH-550) | 1% | Emechara ọgwụgwọ mbụ na ATH/hypophosphite |
| Onye na-agwọ ọrịa (BPO) | 1–2% | Onye na-arụ ọrụ ọkụ dị ala maka ọgwụgwọ ngwa ngwa |
| Onye na-egbochi nkwụsị (Aerosil R202) | 0.5% | Thixotropic mgbochi sedimentation |
IV. Njikwa Usoro Dị Mkpa
1. Usoro mgbasa ozi
- Ọgwụgwọ tupu ọgwụgwọ: ATH & hypophosphite tinye na 5% KH-550 / ethanol ngwọta (2h, 80 ° C ihicha)
- Usoro ngwakọta:
- Resin + dispersant → Ngwakọta ọsọ dị ala → Tinye ATH / hypophosphite gbanwetụrụ → Mgbasa ọsọ ọsọ (2500 rpm, 20 min) → Tinye zinc borate / MCA → Ngwakọta dị ala (zere mmebi MCA)
- Akụrụngwa: igwekota mbara igwe (vacuum degassing) ma ọ bụ igwe igwe mpịakọta atọ (maka ultrafine powders)
2. Ịgwọ Optimization
- Ngwọta nzọụkwụ: 80°C/1h (pre-gel) → 140°C/2h (ọgwụgwọ-ọgwụgwọ, zere ire ere MCA)
- Njikwa nrụgide: 0.5-1 MPa iji gbochie ndozi ndozi
3. Usoro mmekọrịta
- ATH + Hypophosphite: Na-etolite cha cha agbadoro AlPO₄ ka ọ na-agbaghara radicals (PO·)
- Zinc borate + MCA: ihe mgbochi abụọ siri ike nke gas (dilution NH₃ + oyi akwa enyo gbazere)
V. Atụmatụ ngbanwe arụmọrụ
Okwu ndị nkịtị & Ngwọta
| Okwu | Mgbọrọgwụ | Ngwọta |
|---|---|---|
| Mgbanye ntanye | Ala gbazee viscosity | Mee MCA gaa na 5% + hypophosphite ruo 12%, ma ọ bụ tinye 0.5% PTFE micropowder |
| Njikota nke agwọtachara | Ibu ATH karịrị akarị | Belata ATH ka ọ bụrụ 25% + 5% nano-CaCO₃ (na-emesi ike) |
| Nchekwa sedimentation | Ogbenye thixotropy | Mụbaa silica ruo 0.8% ma ọ bụ gbanwee gaa BYK-410 |
| LOI <28% | Oge gas na-ezughị ezu FR | Tinye phosphorus na-acha uhie uhie 2% ma ọ bụ 1% nano-BN |
VI. Usoro nkwado
- UL94 V0: 3.2 mm samples, ngụkọta oge ọkụ <50 s (enweghị owu mgbanye)
- LOI ≥30% (oke nchekwa)
- Ihe fọdụrụ TGA>25% (800°C, N₂)
- Mechanical itule: ike tensile>8 MPa, shiee ike>6 MPa
Isi ihe eji eme ihe
- Na-enweta ọkwa V0 ka ọ na-ejigide iguzosi ike n'ezi ihe.
- Ọnwụnwa ndị pere mpe (50g) akwadoro tupu agụchaa.
- Maka ịrụ ọrụ dị elu: Enwere ike ịgbakwunye 2-3% mmepụta DOPO (dịka ọmụmaatụ, phosphaphenanthrene).
Nhazi a na-eme ka nrube isi n'ụkpụrụ na-egbochi ire ọkụ ka ọ na-ebuli ikike nhazi yana arụmọrụ njedebe.
Oge nzipu: Jul-01-2025
