PBT Halogen-Free Flame Retardant Formulation

PBT Halogen-Free Flame Retardant Formulation

Kuti mupange kachitidwe ka halogen-free flame retardant (FR) ya PBT, ndikofunikira kuti muzitha kuyendetsa bwino lawi, kukhazikika kwamafuta, kutengera kutentha, komanso makina amakina.

I. Core Flame Retardant Combinations

1. Aluminium Hypophosphite + MCA (Melamine Cyanurate) + Zinc Borate

Njira:

• Aluminium Hypophosphite (Kukhazikika kwa kutentha> 300 ° C): Imalimbikitsa mapangidwe a char mu gawo lofupikitsidwa ndi kutulutsa PO· radicals mu gawo la mpweya kuti asokoneze kuyaka kwa tcheni.
• MCA (Kuwola kutentha ~ 300 ° C): Kuwola kwa Endothermic kumatulutsa mpweya wa inert (NH₃, H₂O), kusungunula mpweya woyaka komanso kupondereza kusungunuka kwamadzi.
• Zinc Borate (Kutentha kwa kutentha > 300 ° C): Imawonjezera kupangika kwa magalasi, imachepetsa utsi ndi kuwala.

Chiyerekezo Chovomerezeka:
Aluminiyamu Hypophosphite (10-15%) + MCA (5-8%) + Zinc Borate (3-5%).

2. Surface-Modified Magnesium Hydroxide + Aluminium Hypophosphite + Organic Phosphinate (mwachitsanzo, ADP)

Njira:

• Magnesium Hydroxide Yosinthidwa (Kutentha kwa kutentha ~ 300 ° C): Kuchiza pamwamba (silane/titanate) kumapangitsa kuti pakhale kufalikira komanso kukhazikika kwa kutentha pamene kumatenga kutentha kutsika kutentha kwa zinthu.
• Organic Phosphinate (monga ADP, Thermal stability> 300°C): Imagwira ntchito bwino kwambiri poletsa malawi a gasi, yolumikizana ndi ma phosphorous-nitrogen system.

Chiyerekezo Chovomerezeka:
Magnesium Hydroxide (15-20%) + Aluminiyamu Hypophosphite (8-12%) + ADP (5-8%).

II. Optional Synergists

• Nano Clay/Talc (2-3%): Imapititsa patsogolo ubwino wa char ndi makina amakina pamene kuchepetsa mlingo wa FR.
• PTFE (Polytetrafluoroethylene, 0.2-0.5%): Anti-dripping agent kuti ateteze madontho oyaka.
• Silicone Powder (2-4%): Imalimbikitsa kupangika kwamoto wandiweyani, kumawonjezera kuchedwa kwa malawi ndi gloss pamwamba.

III. Zophatikiza Zoyenera Kupewa

• Aluminiyamu Hydroxide: Imawonongeka pa 180-200 ° C (pansi pa PBT processing temp. ya 220-250 ° C), zomwe zimatsogolera kuwonongeka msanga.
• Magnesium Hydroxide Yosasinthika: Imafunikira chithandizo chapamwamba kuti chiteteze kuphatikizika ndi kuwonongeka kwamafuta pakukonza.

IV. Malangizo Okhathamiritsa Kuchita

1. Chithandizo cha Pamwamba: Gwiritsani ntchito silane coupling agents pa magnesium hydroxide ndi zinc borate kuti mupititse patsogolo kubalalikana ndi kulumikizana pakati pa nkhope.
2. Kuwongolera Kutentha kwa Kutentha: Onetsetsani kuti FR kuwonongeka kwa kutentha> 250 ° C kuti mupewe kuwonongeka panthawi yokonza.
3. Mechanical Property Balance: Phatikizani zodzaza nano (monga, SiO₂) kapena zolimbitsa thupi (monga, POE-g-MAH) kuti mulipire kutaya mphamvu.

V. Chitsanzo Mapangidwe Chitsanzo

VI. Zofunika Zoyesa Zofunikira

• Kuchedwa kwa Lawi lamoto: UL94 V-0 (1.6mm), LOI> 35%.
• Kukhazikika kwamafuta: zotsalira za TGA> 25% (600°C).
• Katundu Wamakina: Kulimba kwamphamvu> 45 MPa, osawoneka> 4 kJ/m².

Mwa kukhathamiritsa ma ratios, njira yabwino yochepetsera moto ya halogen ingathe kukwaniritsidwa ndikusunga magwiridwe antchito a PBT.

More info., pls contact lucy@taifeng-fr.com