Halogen-Yemahara Flame Retardant Formulation yeTPU Coating System Uchishandisa DMF Solvent
Kune TPU yekuputira masisitimu anoshandisa Dimethyl Formamide (DMF) seanonyungudutsa, kushandiswa kwealuminium hypophosphite (AHP) uye zinc borate (ZB) sezvidziviriro zvemurazvo zvinoda kuongororwa kwakarongeka. Pazasi pane yakadzama yekuongorora uye hurongwa hwekuita:
I. Feasibility Analysis yeAluminium Hypophosphite (AHP)
1. Flame Retardant Mechanism uye Zvakanakira
- Mechanism:
- Inoora patembiricha yakakwira kugadzira phosphoric uye metaphosphoric acids, ichikurudzira kuumbwa kwechar muTPU (yakapfupika-chikamu cheflame retardancy).
- Inoburitsa PO · radicals kuvhiringa combustion chain reactions (gas-phase flame retardancy).
- Zvakanakira:
- Halogen-isina, yakaderera utsi, yakaderera muchetura, inoenderana neRoHS/REACH.
- Kugadzikana kwakanaka kwekushisa (kuparara kwekushisa ≈300 ° C), kwakakodzera TPU kuomesa maitiro (kazhinji <150 ° C).
2. Matambudziko Okushandisa uye Mhinduro
| Dambudziko | Solution |
| Kupararira kwakashata muDMF | Shandisa pamusoro-yakagadziridzwa AHP (semuenzaniso, silane coupling agent KH-550). Pre-dispersion process: Bhora-chigayo AHP ine DMF uye dispersant (semuenzaniso, BYK-110) kuti particle size <5μm. |
| Yakakwira yekurodha zvinodiwa (20-30%) | Synergistic kusanganiswa neZB kana melamine cyanrate (MCA) kuderedza kurodha kusvika pa15-20%. |
| Yakaderedzwa coating transparency | Shandisa nano-sized AHP (particle size <1μm) kana kusanganisa nezvinopenya murazvo retardants (semuenzaniso, organic phosphates). |
3. Yakakurudzirwa Kugadzira uye Maitiro
- Kugadzira Muenzaniso:
- TPU/DMF base: 100 phr
- Pamusoro-yakagadziridzwa AHP: 20 phr
- Zinc borate (ZB): 5 phr (smoke suppression synergy)
- Dispersant (BYK-110): 1.5 phr
- Maitiro Akakosha Mapoinzi:
- Pre-sanganisa AHP ine dispersant uye chikamu DMF pasi pepamusoro shear (≥3000 rpm, 30 min), wozosanganisa neTPU slurry.
- Post-coating drying: 120-150°C, wedzera nguva ne10% kuti uve nechokwadi chekubuda kweDMF.
II. Feasibility Analysis yeZinc Borate (ZB)
1. Flame Retardant Mechanism uye Zvakanakira
- Mechanism:
- Inogadzira B₂O₃ girazi layer pane tembiricha yakakwira, ichivharira okisijeni uye kupisa (condensed-phase flame retardancy).
- Inoburitsa mvura yakasungwa (~ 13%), kudimbura magasi anopfuta uye kutonhora sisitimu.
- Zvakanakira:
- Yakasimba synergistic mhedzisiro ine AHP kana aluminium trihydroxide (ATH).
- Yakanakisa kudzvinyirira utsi, yakanakira yakaderera-utsi application.
2. Matambudziko Okushandisa uye Mhinduro
| Dambudziko | Solution |
| Kusagadzikana kwekupararira | Shandisa nano-sized ZB (<500nm) uye wetting agents (semuenzaniso, TegoDispers 750W). |
| Low flame retardant performance (yakakwira kurodha inodiwa) | Shandisa se synergist (5-10%) ine yekutanga murazvo retardants (semuenzaniso, AHP kana organic phosphorus). |
| Yakaderedzwa coating flexibility | Dzorera ne plasticizers (semuenzaniso, DOP kana polyester polyols). |
3. Yakakurudzirwa Kugadzira uye Maitiro
- Kugadzira Muenzaniso:
- TPU/DMF base: 100 phr
- Nano-saizi ZB: 8 phr
- AHP: 15 phr
- Wetting agent (Tego 750W): 1 phr
- Maitiro Akakosha Mapoinzi:
- Pre-paradzira ZB muDMF kuburikidza nebead milling (particle size ≤2μm) isati yasanganiswa neTPU slurry.
- Wedzera nguva yekuomesa (semuenzaniso, 30 min) kudzivirira hunyoro hwasara hunokanganisa kunonoka kwemurazvo.
III. Synergistic Evaluation yeAHP + ZB System
1. Synergistic Flame Retardant Migumisiro
- Gas-Phase & Condensed-Phase Synergy:
- AHP inopa phosphorus yekuchaya, ukuwo ZB ichidzikamisa char layer uye inodzvanya kupenya.
- Yakasanganiswa LOI: 28-30%, UL94 V-0 (1.6mm) inogoneka.
- Smoke Suppression:
- ZB inoderedza kuburitsa hutsi ne>50% (Cone Calorimeter test).
2. Performance Bancing Recommendations
- Mechanical Property Compensation:
- Wedzera 2-3% TPU plasticizer (eg, polycaprolactone polyol) kuchengetedza kushanduka (elongation> 300%).
- Shandisa ultrafine powders (AHP/ZB <2μm) kuti uderedze kurasikirwa kwesimba.
- Process Stability Control:
- Chengetedza slurry viscosity pa2000-4000 cP (Brookfield RV, spindle 4, 20 rpm) yekupfekedza yunifomu.
IV. Kuenzanisa ne Solvent-Yakavakirwa Liquid Flame Retardants
| Parameter | AHP + ZB System | Liquid Phosphorus-Nitrogen FR (semuenzaniso, Levagard 4090N) |
| Loading | 20-30% | 15-25% |
| Kupararira Kuoma | Inoda pre-kurapwa (yakakwirira shear / pamusoro pekugadzirisa) | Kuparara kwakananga, hapana kupararira kunodiwa |
| Mutengo | Yakaderera (~$3-5/kg) | Pamusoro (~$10-15/kg) |
| Environmental Impact | Halogen-isina, yakaderera chepfu | Inogona kunge iine halogens (inotsamira pachigadzirwa) |
| Coating Transparency | Semi-translucent kune opaque | Zviri pachena |
V. Yakakurudzirwa Matanho Ekuita
- Lab-Scale Testing:
- Ongorora AHP/ZB mumwe nemumwe uye musanganiswa (gradient kurodha: 10%, 15%, 20%).
- Ongorora kugadzikana kwekupararira (hapana sedimentation mushure me24h), viscosity inoshanduka, uye kupfekedza kufanana.
- Pilot-Scale Validation:
- Gadzirisa mamiriro ekuomesa (nguva / tembiricha) uye bvunzo murazvo retardancy (UL94, LOI) uye michina zvinhu.
- Enzanisa mitengo: Kana AHP + ZB ichideredza mari ne> 30% vs. liquid FRs, inogoneka mune zvehupfumi.
- Kugadzirira Kuwedzera:
- Bata pamwe nevashambadziri kugadzira pre-yakaparadzirwa AHP/ZB masterbatches (DMF-based) yekugadzira zviri nyore.
VI. Mhedziso
Iine inodzorwa yekuparadzira maitiro, AHP neZB inogona kushanda seanoshanda mirazvo retardants yeTPU/DMF machira, akapihwa:
- Kugadziriswa kwepamusoro + kupararira kwepamusoro-soroinoshandiswa kudzivirira particle agglomeration.
- AHP (yekutanga) + ZB (synergist)kuenzanisa kushanda zvakanaka uye mutengo.
- Forkujeka kwepamusoro / kushandukazvinodiwa, mvura phosphorus-nitrogen FRs (semuenzaniso, Levagard 4090N) inoramba ichidiwa.
Sichuan Taifeng New Flame Retardant Co., Ltd.(ISO & REACH)
Email: lucy@taifeng-fr.com
Nguva yekutumira: May-22-2025
