PBT Halogen-Yemahara Flame Retardant Reference Formulation
Kukwenenzvera kugadzirwa kwehalogen-isina moto retardants yePBT, zvakakosha kuenzanisa murazvo wekudzora kushanda zvakanaka, kugadzikana kwekupisa, kugadzirisa kuenderana kwekushisa, uye michina yemagetsi. Pazasi pane yakagadziridzwa yekubatanidza zano ine yakakosha ongororo:
1. Core Flame Retardant Combinations
Sarudzo yekutanga: Aluminium Hypophosphite + MCA (Melamine Cyanurate) + Zinc Borate
Mechanism:
- Aluminium Hypophosphite (Thermal stability> 300°C): Inosimudzira kuumbwa kwechar muchikamu chakakonyedzwa uye inoburitsa PO· radicals muchikamu chegasi kuvhiringidza mabatiro echeni yekupisa.
- MCA (Decomposition at ~ 300°C): Endothermic decomposition inoburitsa inert magasi (NH₃, H₂O), diluting magasi anopfuta uye kudzvanyirira kunyungudika kudonha.
- Zinc Borate (Kuora> 300°C): Inosimudzira kuumbwa kwechar yegirazi, kuderedza utsi uye kupenya.
Recommended ratio:
- Aluminium Hypophosphite (10-15%) + MCA (5-8%) + Zinc Borate (3-5%).
Sarudzo yechipiri: Surface-Modified Magnesium Hydroxide + Aluminium Hypophosphite + Organic Phosphinate (semuenzaniso, ADP)
Mechanism:
- Modified Magnesium Hydroxide (Kuparara ~ 300 ° C): Kurapa kwepamusoro (silane / titanate) kunovandudza kupararira uye kugadzikana kwekushisa; endothermic kutonhora kunoderedza tembiricha yezvinhu.
- Organic Phosphinate (eg, ADP, thermal stability> 300°C): Yakanyanya kushanda gas-phase flame retardant, synergizing with phosphorus-nitrogen systems.
Recommended ratio:
- Magnesium Hydroxide (15-20%) + Aluminium Hypophosphite (8-12%) + ADP (5-8%).
2. Optional Synergists
- Nano-clay/Talc (2-3%): Inovandudza char mhando uye michina zvivakwa uku ichidzikisa moto unodzora kurodha.
- PTFE (0.2-0.5%): Anti-dripping agent kudzivirira kupisa madonhwe.
- Silicone Powder (2-4%): Inosimudzira ganda rakakora, rinowedzera kunonoka kwemurazvo uye kupenya kwepasi.
3. Misanganiswa Yokudzivisa
- Aluminium Hydroxide: Inoparara pa180-200 ° C (pasi pePBT yekugadzirisa tembiricha ye220-250 ° C), zvichiita kuti iparadze nguva isati yakwana.
- Unmodified Magnesium Hydroxide: Inoda kurapwa kwepamusoro kudzivirira agglomeration uye kuora kwekupisa panguva yekugadzirisa.
4. Performance Optimization Tips
- Kurapa Kwepamusoro: Shandisa silane coupling agents paMg(OH)₂ uye zinc borate kusimudzira kupararira uye kubatana kwechiso.
- Kugadzirisa Tembiricha Kudzora: Ita shuwa kuti murazvo unodzoreredza kuora tembiricha> 250 ° C kudzivirira kudzikira.
- Mechanical Property Balance: Kutsiva kurasikirwa kwesimba uchishandisa nano-fillers (semuenzaniso, SiO₂) kana tougheners (semuenzaniso, POE-g-MAH).
5. Muenzaniso Formulation
| Flame Retardant | Kurodha (wt%) | Basa |
|---|---|---|
| Aluminium Hypophosphite | 12% | Main flame retardant (yakanyungudutswa + gasi chikamu) |
| MCA | 6% | Gas-phase flame retardant, utsi kudzvinyirira |
| Zinc Borate | 4% | Synergistic char kuumbwa, kuderedza utsi |
| Nano Talc | 3% | Kusimbisa Char, kuvandudzwa kwemichina |
| PTFE | 0.3% | Anti-dripping |
6. Key Testing Metrics
- Flame Retardancy: UL94 V-0 (1.6mm), LOI> 35%.
- Thermal Kugadzikana: TGA zvakasara> 25% (600 ° C).
- Mechanical Properties: Tensile simba> 45 MPa, notched impact> 4 kJ/m².
Nekugadzirisa-mareshiyo, yakakwirira-inoshanda halogen-isina murazvo retardancy inogona kuwanikwa uchichengetedza kuita kwePBT kwese.
More info., pls send email to lucy@taifeng-fr.com
Nguva yekutumira: Jul-08-2025
