PBT Halogen-Yemahara Flame Retardant Kugadzira
Kugadzira halogen-isina flame retardant (FR) system yePBT, zvakakosha kuenzanisa murazvo wekudzoreredza kushanda zvakanaka, kugadzikana kwekupisa, kugadzirisa kuenderana kwekushisa, uye michina yemagetsi.
I. Core Flame Retardant Combinations
1. 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 temp. ~300°C): Endothermic decomposition inoburitsa inert magasi (NH₃, H₂O), diluting magasi anopfuta uye kudzvanyirira kunyungudika kudonha.
- Zinc Borate (Decomposition temp. > 300°C): Inosimudzira kuumbwa kwechar yegirazi, inoderedza utsi uye kupenya.
Recommended ratio:
Aluminium Hypophosphite (10-15%) + MCA (5-8%) + Zinc Borate (3-5%).
2. Surface-Modified Magnesium Hydroxide + Aluminium Hypophosphite + Organic Phosphinate (semuenzaniso, ADP)
Mechanism:
- Modified Magnesium Hydroxide (Decomposition temp. ~300°C): Kurapa kwepamusoro (silane/titanate) kunonatsiridza kupararira uye kugadzikana kwekupisa uku kuchitora kupisa kudzikisa tembiricha.
- Organic Phosphinate (semuenzaniso, ADP, Thermal kugadzikana> 300 ° C): Inoshanda zvakanyanya gas-phase flame retardant, synergizing with phosphorus-nitrogen systems.
Recommended ratio:
Magnesium Hydroxide (15-20%) + Aluminium Hypophosphite (8-12%) + ADP (5-8%).
II. Optional Synergists
- Nano Clay/Talc (2-3%): Inovandudza char mhando uye michina zvivakwa uku ichideredza FR dosage.
- PTFE (Polytetrafluoroethylene, 0.2-0.5%): Anti-dripping agent kudzivirira kupisa madonhwe.
- Silicone Powder (2-4%): Inosimudzira ganda rakakora, rinowedzera kunonoka kwemurazvo uye kupenya kwepasi.
III. Misanganiswa Yokudzivisa
- Aluminium Hydroxide: Inoparara pa180-200 ° C (pasi pePBT processing temp. ye 220-250 ° C), zvichiita kuti iparadze nguva isati yakwana.
- Unmodified Magnesium Hydroxide: Inoda kurapwa kwepamusoro kudzivirira agglomeration uye kuora kwekupisa panguva yekugadzirisa.
IV. Performance Optimization Recommendations
- Kurapa Kwepamusoro: Shandisa silane coupling agents pamagnesium hydroxide uye zinc borate kuti uwedzere kupararira uye kubatana kwechiso.
- Kugadzirisa Temperature Kudzora: Ita shuwa FR decomposition tembiricha> 250 ° C kudzivirira kushatisa panguva yekugadzirisa.
- Mechanical Property Balance: Batanidza nano-fillers (semuenzaniso, SiO₂) kana tougheners (semuenzaniso, POE-g-MAH) kubhadhara kurasikirwa kwesimba.
V. Muenzaniso Wekugadzirisa Muenzaniso
| Flame Retardant | Kurodha (wt%) | Basa |
|---|---|---|
| Aluminium Hypophosphite | 12% | Primary FR (yakanyungudutswa + gasi chikamu) |
| MCA | 6% | Gasi-chikamu FR, kudzvinyirira utsi |
| Zinc Borate | 4% | Synergistic char kuumbwa, kudzvinyirira utsi |
| Nano Talc | 3% | Kusimbisa Char, kuvandudzwa kwemichina |
| PTFE | 0.3% | Anti-dripping |
VI. Key Testing Parameters
- 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, inoshanda halogen-isina murazvo retardant system inogona kuwanikwa uchichengetedza kuita kwePBT kwese.
More info., pls contact lucy@taifeng-fr.com
Nguva yekutumira: Jul-01-2025
