PBT Halogen-Free Flame Retardant Reference Formulation

PBT Halogen-Free Flame Retardant Reference Formulation

Don haɓaka ƙirƙira na masu riƙe harshen wuta marasa halogen don PBT, yana da mahimmanci don daidaita ƙimar jinkirin harshen wuta, kwanciyar hankali na zafi, daidaita yanayin zafin jiki, da kaddarorin injina. A ƙasa akwai ingantacciyar dabarar haɗawa tare da mahimman nazari:

1. Haɗaɗɗen Ƙwararrun Ƙwararru

Zabin 1: Aluminum Hypophosphite + MCA (Melamine Cyanurate) + Zinc Borate

Makaniyanci:

• Aluminum Hypophosphite (Tsarin zafin jiki> 300 ° C): Yana haɓaka haɓakar char a cikin lokacin da aka ƙunsa kuma yana sakin PO · radicals a cikin lokacin gas don katse halayen sarkar konewa.
• MCA (Rushewa a ~ 300°C): Bazuwar Endothermic yana fitar da iskar gas mara amfani (NH₃, H₂O), diluting gas mai ƙonewa da kuma hana narkewar narkewa.
• Zinc Borate (Bazuwar> 300°C): Yana haɓaka samuwar char mai gilashi, yana rage hayaki da bayan haske.

Rabon da aka Shawarta:

• Aluminum Hypophosphite (10-15%) + MCA (5-8%) + Zinc Borate (3-5%).

Zabi na 2: Magnesium Hydroxide da Aka Canja Fasa + Aluminum Hypophosphite + Organic Phosphinate (misali, ADP)

Makaniyanci:

• Magnesium Hydroxide da aka gyara (Bazuwar ~ 300 ° C): Jiyya na saman (silane / titanate) yana inganta tarwatsawa da kwanciyar hankali na thermal; endothermic sanyi yana rage yawan zafin jiki.
• Organic Phosphinate (misali, ADP, thermal kwanciyar hankali> 300°C): Ingantacciyar iskar gas-lokacin harshen wuta, aiki tare da tsarin phosphorus-nitrogen.

Rabon da aka Shawarta:

• Magnesium Hydroxide (15-20%) + Aluminum Hypophosphite (8-12%) + ADP (5-8%).

2. Zaɓuɓɓuka Synergists

• Nano-laka/Talc (2-3%): Yana haɓaka ingancin char da kaddarorin injina yayin da rage ɗorawa wuta.
• PTFE (0.2-0.5%): Mai hana-dripping wakili don hana ɗigon ƙonawa.
• Foda Silicone (2-4%): Yana haɓaka haɓakar char mai yawa, haɓaka jinkirin harshen wuta da sheki.

3. Haɗuwa don Gujewa

• Aluminum Hydroxide: Rushewa a 180-200 ° C (a ƙasa da zafin jiki na PBT na 220-250 ° C), yana haifar da lalacewa da wuri.
• Magnesium Hydroxide wanda ba a canza shi ba: Yana buƙatar jiyya na sama don hana haɓakawa da bazuwar thermal yayin aiki.

4. Tips inganta Ayyuka

• Jiyya na saman: Yi amfani da silane coupling agents akan Mg(OH)₂ da zinc borate don haɓaka tarwatsawa da haɗin kai.
• Sarrafa Yanayin zafin jiki: Tabbatar da zafin bazuwar harshen wuta> 250°C don gujewa lalacewa.
• Ma'aunin Ma'auni na Injini: Bayar da asarar ƙarfi ta amfani da nano-fillers (misali, SiO₂) ko masu tauri (misali, POE-g-MAH).

5. Samfuran Misali

6. Mahimman Ma'aunin Gwaji

• Jinkirin harshen wuta: UL94 V-0 (1.6mm), LOI> 35%.
• Ƙarfafawar zafi: ragowar TGA> 25% (600°C).
• Kayayyakin Injini: Ƙarfin juzu'i> 45 MPa, tasiri mara kyau> 4 kJ/m².

Ta hanyar daidaita ma'auni, ingantaccen ingantaccen halogen-free harshen wuta za a iya samu yayin da yake kiyaye aikin PBT gabaɗaya.

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