Flame-Retardant Formulation Design Recommendations for Halogen-Free High-Impact Polystyrene (HIPS)
Cov neeg siv khoom xav tau: Nplaim-retardant HIPS rau cov khoom siv hluav taws xob hauv tsev, cuam tshuam lub zog ≥7 kJ / m², melt flow index (MFI) ≈6 g / 10min, txhaj tshuaj molding.
1. Phosphorus-Nitrogen Synergistic Flame-Retardant System
HIPS Flame-Retardant Formulation (Table 1)
| Cheebtsam | Chaw thau khoom (phr) | Lus hais |
| HIPS cob | 100 | Cov khoom siv hauv paus |
| Ammonium polyphosphate (APP) | 15-20 | Phosphorus qhov chaw |
| Melamine cyanurate (MCA) | 5-10 | Nitrogen qhov chaw, synergizes nrog APP |
| Expanded graphite (EG) | 3-5 | Enhances char tsim |
| Anti-dripping agent (PTFE) | 0.3-0.5 hli | Tiv thaiv molten droplets |
| Compatibilizer (piv txwv li, MAH-grafted HIPS) | 2-3 | Txhim kho dispersion |
Nta:
- Ua tiavUL94 V-0ntawm intumescent char tsim los ntawm APP / MCA synergy.
- Halogen-dawb thiab eco-phooj ywg, tab sis tuaj yeem txo cov khoom siv dag zog; yuav tsum optimization.
2. Hlau Hydroxide nplaim-Retardant System
HIPS Formulation (Table 2)
| Cheebtsam | Chaw thau khoom (phr) | Lus hais |
| HIPS cob | 100 | - |
| Aluminium hydroxide (ATH) | 40-60 | Thawj nplaim retardant |
| Magnesium hydroxide (MH) | 10-20 | Synergizes nrog ATH |
| Silane coupling agent (xws li KH-550) | 1-2 | Txhim kho qhov muab tub lim dispersion |
| Toughener (eg, SEBS) | 5-8 | Compensates rau kev cuam tshuam lub zog poob |
Nta:
- Yuav tsum muaj> 50% loadingrau UL94 V-0, tab sis degrades cuam tshuam lub zog thiab ntws.
- Haum rau kev siv hluav taws xob tsawg / tsawg-tshuaj lom (xws li, kev tsheb nqaj hlau).
3. Phosphorus-Nitrogen Synergistic System (Aluminium Hypophosphite + MCA)
Optimized HIPS Formulation
| Cheebtsam | Chaw thau khoom (phr) | Function/Notes |
| HIPS (qib cuam tshuam loj, xws li PS-777) | 100 | Cov khoom siv hauv paus (kev cuam tshuam ≥5 kJ / m²) |
| Aluminium hypophosphite (AHP) | 12-15 | Phosphorus qhov chaw, thermal stability |
| Melamine cyanurate (MCA) | 6-8 | Nitrogen qhov chaw, synergizes nrog AHP |
| SIB/SBS | 8-10 | Qhov tseem ceeb toughener rau kev cuam tshuam ≥7 kJ / m² |
| Ua kua paraffin / epoxidized soybean roj | 1-2 | Lubricant, txhim kho ntws / dispersion |
| PTFE | 0.3-0.5 hli | Anti-dripping agent |
| Antioxidant 1010 | 0.2 | Tiv thaiv kev degradation |
Kev txiav txim siab tsim nyog:
- Resin xaiv:
- Siv cov qib HIPS cuam tshuam loj (xws li,Chimei PH-888,Taifa PG-33) nrog rau qhov cuam tshuam lub zog ntawm 5-6 kJ / m². SEBS ntxiv dag zog.
- Flowability Control:
- AHP/MCA txo MFI; compensate nrog lubricants (xws li, kua paraffin) los yog plasticizers (xws li, epoxidized soybean roj).
- Yog tias MFI tseem qis, ntxiv2-3 TPUlos txhim kho ntws thiab toughness.
- Nplaim Retardancy Validation:
- AHP tuaj yeem raug txo kom tsawg12 phryog ua ke nrog2-3 ESUL94 V-0.
- RauUL94 V-2, txo cov nplaim retardant loads kom ua ntej qhov cuam tshuam / ntws.
- Txhaj Molding Parameters:
- Kub:180-220 ° C(tsis txhob AHP/HIPS degradation).
- Txhaj ceev:Nruab nrab-siabtxhawm rau tiv thaiv kev ua tsis tiav.
Kev Ua Haujlwm Cia Siab:
| Khoom | Lub hom phiaj tus nqi | Test Standard |
| Kev cuam tshuam lub zog | ≥7kJ/m² | ISO 179/1 eA |
| MFI (200 ° C / 5 kg) | 5-7 g / 10 feeb | ASTM D 1238 Cov |
| Nplaim retardancy | UL94 V-0 (1.6 hli) | UL94 ua |
| Tensile zog | ≥25 MPa | TS EN ISO 527 |
4. Lwm txoj kev daws teeb meem
- Nqi-Sensitive Option: Hloov AHP ib feem nrogmicroencapsulated liab phosphorus (3-5 phr), tab sis nco ntsoov xim txwv (reddish-xim av).
- Kev lees paub: Ua qhov kev sim me me kom sib npaug ntawm cov nplaim hluav taws xob ua ntej ua kom zoo txaus.
More info. , pls contact lucy@taifeng-fr.com
Post lub sij hawm: Aug-15-2025
