I-PBT Halogen-Free Flame Retardant Formulation
Ukuphuhlisa inkqubo ye-halogen-free flame retardant (FR) ye-PBT, kubalulekile ukulungelelanisa ukusebenza kakuhle kwe-flame retardancy, ukuzinza kwe-thermal, ukuhambelana kokushisa, kunye neempawu zomatshini.
I. IiNdibaniselwano eziNxibelelaniso zeLanga
1. IAluminiyam Hypophosphite + MCA (Melamine Cyanurate) + Zinc Borate
Inkqubo:
- I-Aluminiyamu Hypophosphite (Ukuzinza kwe-Thermal> 300 ° C): Ikhuthaza ukubunjwa kwe-char kwisigaba esincitshisiweyo kwaye ikhuphe i-PO· radicals kwisigaba segesi ukuphazamisa ukuphendula kwekhonkco lokutsha.
- I-MCA (i-Decomposition temp. ~ 300 ° C): I-endothermic decomposition ikhupha iigesi ezingenayo (NH₃, H₂O), i-diluting iigesi ezinokutsha kunye nokucinezela ukunyibilika okuvuzayo.
- I-Zinc Borate (Iqondo lobushushu lokubola > 300°C): Iphucula ukumila kweglasi emhlophe, inciphisa umsi kunye nokuvutha.
Umlinganiselo oCetyisiweyo:
IAluminiyam Hypophosphite (10-15%) + MCA (5-8%) + Zinc Borate (3-5%).
2. I-Surface-Modified Magnesium Hydroxide + Aluminium Hypophosphite + Organic Phosphinate (umz., ADP)
Inkqubo:
- I-Magnesium Hydroxide elungisiweyo (i-Decomposition temp. ~ 300 ° C): Unyango lwe-surface (silane / titanate) luphucula ukusasazeka kunye nokuzinza kwe-thermal ngelixa ufunxa ubushushu kwiqondo lokushisa elisezantsi.
- Organic Phosphinate (umzekelo, ADP, Thermal uzinzo> 300 °C): Isebenza kakhulu igesi-isigaba sokubuyiswa kwedangatye, ukusebenzisana neenkqubo ze-phosphorus-nitrogen.
Umlinganiselo oCetyisiweyo:
I-Magnesium Hydroxide (15-20%) + I-Aluminiyam Hypophosphite (8-12%) + ADP (5-8%).
II. Optional Synergists
- I-Nano Clay / Talc (2-3%): Ukuphucula umgangatho we-char kunye neempawu zemishini ngelixa unciphisa umthamo we-FR.
- I-PTFE (i-Polytetrafluoroethylene, 0.2-0.5%): I-Agent echasene nokuvuza ukukhusela amathontsi avuthayo.
- I-Silicone Powder (2-4%): Ikhuthaza ukubunjwa kwe-char eshinyeneyo, iphucula ukubuyiswa komlilo kunye neglosi yeglosi.
III. Imidibaniso omele uyiphephe
- I-Aluminium Hydroxide: Ibola kwi-180-200 ° C (ngaphantsi kwe-PBT processing temp. ye-220-250 ° C), ekhokelela ekuthotyweni kwangaphambi kwexesha.
- I-Magnesium Hydroxide engalungiswanga: Ifuna unyango olungaphezulu ukukhusela i-agglomeration kunye nokubola kwe-thermal ngexesha lokucubungula.
IV. Iingcebiso zokuSebenza ngokuPhucula
- Unyango olungaphezulu: Sebenzisa i-silane coupling agents kwi-magnesium hydroxide kunye ne-zinc borate ukuqinisa ukusasazwa kunye nokuhlangana kobuso.
- Ukulungiswa koLawulo lobushushu: Qinisekisa i-FR yokubola iqondo lokushisa> 250 ° C ukuphepha ukuthotywa ngexesha lokucubungula.
- IMechanical Property Ibhalansi: Dibanisa i-nano-fillers (umz., SiO₂) okanye i-tougheners (umzekelo, i-POE-g-MAH) ukubuyisela ukulahlekelwa kwamandla.
V. Umzekelo woKuqulunqa oqhelekileyo
| I-Flame Retardant | Iyalayisha (wt%) | Umsebenzi |
|---|---|---|
| I-Aluminiyam Hypophosphite | 12% | Primary FR (icondensed + gas phase) |
| MCA | 6% | I-Gas-phase FR, ukunyanzeliswa komsi |
| Zinc Borate | 4% | Ukwenziwa kwe-Synergistic char, ukucinywa komsi |
| Nano Talc | 3% | Ukuqiniswa kweChar, ukuphuculwa koomatshini |
| PTFE | 0.3% | Anti-dripping |
VI. Iiparamitha zoVavanyo oluPhambili
- Ukubuyiswa komlilo: UL94 V-0 (1.6mm), LOI> 35%.
- Ukuzinza kweThermal: intsalela ye-TGA> 25% (600 ° C).
- IiPropati zoomatshini: Amandla okuqina > 45 MPa, impembelelo enophawu > 4 kJ/m².
Ngokwandisa umlinganiselo, inkqubo esebenzayo ye-halogen-free flame retardant inokufezekiswa ngelixa igcina ukusebenza kwe-PBT iyonke.
More info., pls contact lucy@taifeng-fr.com
Ixesha lokuposa: Jul-01-2025
