Tlhahiso ea PBT Halogen-Free Flame Retardant Retardant
Ho ntlafatsa tlhahiso ea li-halogen-free flame retardants bakeng sa PBT, ho bohlokoa ho leka-lekanya ts'ebetso ea ho lieha ha lelakabe, botsitso ba mocheso, ho lumellana ha mocheso, le thepa ea mochine. Ka tlase ke leano le ntlafalitsoeng la ho kopanya le litlhahlobo tsa bohlokoa:
1. Core Flame Retardant Combinations
Khetho ea 1: Aluminium Hypophosphite + MCA (Melamine Cyanurate) + Zinc Borate
Mokhoa:
- Aluminium Hypophosphite (Thermal stability> 300°C): E khothalletsa ho etsoa ha char mokhahlelong oa condensed le ho lokolla PO· radicals mokhahlelong oa khase ho sitisa tšebetso ea ketane ea ho tuka.
- MCA (Decomposition at ~300°C): Endothermic decomposition e ntša likhase tse inert (NH₃, H₂O), ho hlapolla likhase tse tukang le ho hatella ho rotha ho qhibiliha.
- Zinc Borate (Ho Senyeha> 300°C): E matlafatsa sebopeho sa likhalase tsa char, e fokotsa mosi le khanya e ka morao.
Karolelano e khothalelitsoeng:
- Aluminium Hypophosphite (10-15%) + MCA (5-8%) + Zinc Borate (3-5%).
Khetho ea 2: Surface-Modified Magnesium Hydroxide + Aluminium Hypophosphite + Organic Phosphinate (mohlala, ADP)
Mokhoa:
- Magnesium Hydroxide e fetotsoeng (Ho senyeha ~ 300 ° C): Phekolo ea holim'a metsi (silane / titanate) e ntlafatsa ho hasana le botsitso ba mocheso; Pholiso ea endothermic e theola mocheso oa thepa.
- Organic Phosphinate (mohlala, ADP, thermal stability> 300°C): E thibelang lelakabe la khase e sebetsang hantle haholo, e hokahaneng le litsamaiso tsa phosphorus-nitrogen.
Karolelano e khothalelitsoeng:
- Magnesium Hydroxide (15-20%) + Aluminium Hypophosphite (8-12%) + ADP (5-8%).
2. Boikhethelo ba Synergists
- Nano-clay/Talc (2-3%): E ntlafatsa boleng ba char le thepa ea mochini ha e ntse e fokotsa ho kenya lelakabe le lelakabe.
- PTFE (0.2-0.5%): Ntho e thibelang ho rotha ho thibela marotholi a tukang.
- Silicone Powder (2-4%): E khothalletsa sebopeho sa char e teteaneng, e ntlafatsa ho lieha ha lelakabe le ho benya ha bokaholimo.
3. Metsoako e Lokelang ho Qoba
- Aluminium Hydroxide: E senyeha ho 180-200 ° C (ka tlase ho mocheso oa ho sebetsa oa PBT oa 220-250 ° C), e lebisang ho senyeha pele ho nako.
- Magnesium Hydroxide e sa fetotsoeng: E hloka kalafo ea bokaholimo ho thibela ho putlama le ho bola ha mocheso nakong ea ts'ebetso.
4. Malebela a Ntlafatso ea Ts'ebetso
- Kalafo ea Bokaholimo: Sebelisa li-silane coupling agents ho Mg(OH)₂ le zinc borate ho matlafatsa ho hasana le ho kopanya sefahleho.
- Ho sebetsa Taolo ea Mocheso: Etsa bonnete ba hore mocheso o thibelang ho bola o sa sebetseng ho feta 250°C ho qoba ho senyeha.
- Mechanical Property Balance: Ho lefella tahlehelo ea matla ka ho sebelisa nano-fillers (mohlala, SiO₂) kapa li-tougheners (mohlala, POE-g-MAH).
5. Tlhahiso ea Mohlala
| Lelakabe le Retardant | E ea kenya (wt%) | Mosebetsi |
|---|---|---|
| Hypophosphite ea aluminium | 12% | Ntho e ka sehloohong e thibelang lelakabe (e khutsitseng + mokhahlelo oa khase) |
| MCA | 6% | Khatello ea khase ea khase, khatello ea mosi |
| Borate ea Zinc | 4% | Ho theha char ea Synergistic, ho fokotsa mosi |
| Nano Talc | 3% | Ho matlafatsa char, ntlafatso ea mochini |
| PTFE | 0.3% | Khahlanong le ho rotha |
6. Lintlha tsa Teko tsa Bohlokoa
- Ho Fokotsa Lelakabe: UL94 V-0 (1.6mm), LOI> 35%.
- Thermal Stability: TGA masala> 25% (600 ° C).
- Thepa ea Mechini: Matla a tiileng> 45 MPa, tšusumetso e sa bonahaleng> 4 kJ/m².
Ka ho lokisa likarohano hantle, matla a phahameng a halogen-free flame retardncy a ka finyelloa ha ho ntse ho bolokoa ts'ebetso ea kakaretso ea PBT.
More info., pls send email to lucy@taifeng-fr.com
Nako ea poso: Jul-08-2025
