I-Halogen-Free Flame Retardant Formulation for TPU Coating System Ukusebenzisa i-DMF Solvent
Kwiinkqubo zokugquma kwe-TPU usebenzisa i-Dimethyl Formamide (DMF) njenge-solvent, ukusetyenziswa kwe-aluminium hypophosphite (AHP) kunye ne-zinc borate (ZB) njengoko i-flame retardants ifuna ukuhlolwa okucwangcisiweyo. Ngezantsi lucazululo oluneenkcukacha kunye nesicwangciso sophumezo:
I. Uhlalutyo olunokwenzeka lweAluminiyam Hypophosphite (AHP)
1. Inkqubo yokuTyalwa komlilo kunye nezinto eziluncedo
- Inkqubo:
- Ukubola kwiqondo lokushisa eliphezulu ukuvelisa i-phosphoric kunye ne-metaphosphoric acids, ukukhuthaza ukubunjwa kwe-char kwi-TPU (i-condensed-phase-flame retardancy).
- Ikhupha i-PO · radicals ukuphazamisa ukusabela kwekhonkco lokutsha (i-gas-phase flame retardancy).
- Izinto eziluncedo:
- I-Halogen-free, umsi ophantsi, ubutyhefu obuphantsi, ihambelana ne-RoHS / REACH.
- Ukuzinza okuhle kwe-thermal (iqondo lokushisa lokubola ≈300 ° C), lilungele iinkqubo zokumisa i-TPU (ngokuqhelekileyo <150 ° C).
2. Imingeni yesicelo kunye nezisombululo
| Umngeni | Isisombululo |
| Ukusasazwa kakubi kwiDMF | Sebenzisa i-AHP yokulungiswa komphezulu (umzekelo, i-silane coupling agent KH-550). Inkqubo yokusasazwa kwangaphambili: Ibhola-i-AHP ye-Mill kunye ne-DMF kunye ne-dispersant (umzekelo, i-BYK-110) ukuya kwi-particle size <5μm. |
| Imfuno ephezulu yokulayisha (20-30%) | Inhlanganisela ye-Synergistic kunye ne-ZB okanye i-melamine cyanrate (MCA) ukunciphisa ukulayisha okupheleleyo kwi-15-20%. |
| Ukwehliswa kokungafihli kokwaleka | Sebenzisa i-nano-sized AHP (ubungakanani besuntswana <1μm) okanye udibanise ne-transparent flame retardants (umzekelo, i-organic phosphates). |
3. Uqulunqo kunye neNkqubo eCetyisiweyo
- Uqulunqo lwemizekelo:
- TPU/DMF isiseko: 100 phr
- I-AHP eguquliwe phezu komhlaba: 20 phr
- I-Zinc borate (ZB): 5 phr (i-synergy yokunciphisa umsi)
- I-Disperant (BYK-110): 1.5 phr
- Amanqaku aPhambili kwiNkqubo:
- Ukuxuba kwangaphambili i-AHP kunye ne-dispersant kunye ne-partial DMF phantsi kwe-shear ephezulu (≥3000 rpm, i-30 min), uze udibanise ne-TPU slurry.
- I-post-coating drying: i-120-150 ° C, yandisa ixesha nge-10% ukuqinisekisa ukuphuphuma kwe-DMF ngokupheleleyo.
II. Uhlalutyo olunokwenzeka lweZinc Borate (ZB)
1. Inkqubo yokuTyalwa komlilo kunye nezinto eziluncedo
- Inkqubo:
- Yenza umaleko weglasi ye-B₂O₃ kumaqondo obushushu aphezulu, ivalela ioksijini kunye nobushushu (isigaba esijiyileyo sokubuyiswa komlilo).
- Ukukhutshwa kwamanzi abophekileyo (~ 13%), ukuhlambulula iigesi ezinokutsha kunye nokupholisa inkqubo.
- Izinto eziluncedo:
- Impembelelo enamandla ye-synergistic kunye ne-AHP okanye i-aluminium trihydroxide (ATH).
- Ukunciphisa umsi ogqwesileyo, olungele ukusetyenziswa komsi ophantsi.
2. Imingeni yesicelo kunye nezisombululo
| Umngeni | Isisombululo |
| Uzinzo oluphantsi lokusasazwa | Sebenzisa i-nano-sized ZB (<500nm) kunye neearhente zokumanzisa (umz., TegoDispers 750W). |
| Ukusebenza okusezantsi kokubuyiswa komlilo (umthwalo ophezulu uyafuneka) | Sebenzisa njenge-synergist (5-10%) kunye ne-primary flame retardants (umzekelo, i-AHP okanye i-organic phosphorus). |
| Ukwehliswa kokuguquguquka kwengubo | Buyekeza ngeeplastiki (umzekelo, i-DOP okanye iipolyester polyols). |
3. Uqulunqo kunye neNkqubo eCetyisiweyo
- Uqulunqo lwemizekelo:
- TPU/DMF isiseko: 100 phr
- I-Nano-ubungakanani be-ZB: 8 phr
- AHP: 15 phr
- I-arhente yokumanzisa (Tego 750W): 1 phr
- Amanqaku aPhambili kwiNkqubo:
- Ukusasaza kwangaphambili i-ZB kwi-DMF nge-bead milling (ubungakanani be-particle ≤2μm) ngaphambi kokuxuba kunye ne-TPU slurry.
- Yandisa ixesha lokumisa (umzekelo, i-30 min) ukunqanda ukufuma okushiyekileyo okuchaphazela ukulibaziseka komlilo.
III. UVavanyo lwe-Synergistic ye-AHP + ZB System
1. I-Synergistic Flame Retardant Effects
- ISigaba seGesi kunye neSigaba esiXhoxisiweyo:
- I-AHP ibonelela nge-phosphorus yokutshaja, ngelixa i-ZB izinzisa i-char layer kwaye icinezela ukukhanya okukhanyayo.
- I-LOI edibeneyo: 28-30%, UL94 V-0 (1.6mm) efikelelekayo.
- Uthintelo lomsi:
- I-ZB inciphisa ukukhutshwa komsi nge>50% (uvavanyo lweCone Calorimeter).
2. Iingcebiso zoLinganiso lweNtsebenzo
- Imbuyekezo yePropati yoomatshini:
- Yongeza i-2-3% ye-TPU plasticizer (umzekelo, i-polycaprolactone polyol) ukugcina ukuguquguquka (i-elongation> 300%).
- Sebenzisa i-ultrafine powders (i-AHP / ZB <2μm) ukunciphisa ukulahlekelwa kwamandla obunzima.
- Ulawulo lozinzo lwenkqubo:
- Gcina i-viscosity ye-slurry kwi-2000-4000 cP (i-Brookfield RV, i-spindle 4, i-20 rpm) yokugqoka okufanayo.
IV. Ukuthelekisa kunye ne-Solvent-Based Liquid Flame Retardants
| Ipharamitha | AHP + ZB System | Ulwelo lwePhosphorus-Nitrogen FR (umzekelo, iLevagard 4090N) |
| Iyalayisha | 20-30% | 15-25% |
| Ubunzima bokusasazwa | Ifuna unyango lwangaphambili (ukucheba okuphezulu/ukulungiswa komphezulu) | Ukutshatyalaliswa ngokuthe ngqo, akukho kusasazwa okufunekayo |
| Iindleko | Phantsi (~$3-5/kg) | Phezulu (~$10-15/kg) |
| Impembelelo yokusingqongileyo | I-Halogen-free, ityhefu ephantsi | Isenokuba nehalogens (ixhomekeke kwimveliso) |
| Ukwaleka eNgaphandle | Semi-translucent ukuya opaque | Ngokuphezulu elubala |
V. Amanyathelo oPhumezo acetyiswayo
- Uvavanyo lweLab-Scale:
- Vavanya i-AHP/ZB ngabanye kwaye ngokudibeneyo (ukulayishwa kwegradient: 10%, 15%, 20%).
- Vavanya ukuzinza kwe-dispersion (akukho sedimentation emva kwe-24h), utshintsho lwe-viscosity, kunye nokufana kwengubo.
- uQinisekiso loLingelo lwesikali:
- Lungiselela iimeko zokumisa (ixesha / ubushushu) kunye nokuvavanya ukutshatyalaliswa komlilo (UL94, LOI) kunye neempawu zomatshini.
- Thelekisa iindleko: Ukuba i-AHP+ZB inciphisa iindleko nge->30% vs. Ulwelo FRs, iyasebenza ngokwezoqoqosho.
- Ukulungiselela ukuKhalisa:
- Ukusebenzisana nabathengisi ukuphuhlisa ii-masterbatches ze-AHP/ZB ezisasazwe ngaphambili (i-DMF-based) ukwenzela imveliso eyenziwe lula.
VI. Ukuqukumbela
Ngeenkqubo ezilawulwayo zokusasazwa, i-AHP kunye ne-ZB inokusebenza njengezinto ezisebenzayo zokunqanda amadangatye kwi-TPU/DMF yokwambathisa, ukuba:
- Ukuguqulwa komphezulu + ukusasazwa kwe-chear ephezuluisetyenziselwa ukuthintela i-particle agglomeration.
- AHP (ephambili) + ZB (synergist)ibhalansisa ukusebenza kakuhle kunye neendleko.
- Kubaukukhanya okuphezulu / ukuguquguqukaiimfuno, ulwelo phosphorus-nitrogen FRs (umzekelo, Levagard 4090N) zihlala zikhethwa.
Sichuan Taifeng New Flame Retardant Co., Ltd.(ISO & FIKE)
Email: lucy@taifeng-fr.com
Ixesha lokuposa: May-22-2025
