Cov Phosphorus-Nitrogen Flame Retardants puas tuaj yeem ua tiav qhov ntsuas V0 hauv Silicone Rubber?
Thaum cov neeg siv khoom nug txog kev siv tsuas yog txhuas hypophosphite (AHP) lossis AHP + MCA kev sib xyaw ua ke rau kev tiv thaiv hluav taws tsis muaj halogen hauv cov roj hmab silicone kom ua tiav qhov ntsuas V0, cov lus teb yog yog - tab sis kev hloov kho cov tshuaj yuav tsum tau ua raws li qhov yuav tsum tau ua kom tiv thaiv hluav taws. Hauv qab no yog cov lus qhia tshwj xeeb rau ntau qhov xwm txheej sib txawv:
1. Siv Aluminium Hypophosphite (AHP) Xwb
Cov xwm txheej siv tau: Rau UL94 V-1/V-2 cov kev cai lossis cov ntawv thov uas rhiab rau cov khoom siv nitrogen (piv txwv li, zam kev ua npuas dej los ntawm MCA uas yuav cuam tshuam rau qhov tsos).
Cov qauv pom zoo:
- Cov roj hmab hauv paus: Methyl vinyl silicone roj hmab (VMQ, 100 phr)
- Aluminium hypophosphite (AHP): 20–30 phr
- Cov phosphorus ntau (40%); 20 phr muab ~ 8% phosphorus cov ntsiab lus rau kev tiv thaiv hluav taws yooj yim.
- Rau UL94 V-0, nce mus txog 30 phr (tej zaum yuav cuam tshuam rau cov khoom siv kho tshuab).
- Cov khoom siv txhawb zog: Fumed silica (10–15 phr, tswj tau lub zog)
- Cov Khoom Ntxiv: Hydroxyl silicone roj (2 phr, txhim kho kev ua tiav) + tus neeg sawv cev kho (peroxide lossis platinum system)
Cov yam ntxwv:
- AHP ib leeg tsuas yog siv cov hluav taws kub uas ua rau cov pa taws tsis kub (char formation), ua rau cov pa oxygen (LOI) ntawm cov roj hmab silicone zoo dua qub tab sis nws txo tau pa luam yeeb tsawg.
- Kev siv tshuaj ntau (> 25 phr) yuav ua rau cov khoom tawv dua; ntxiv 3–5 phr zinc borate tuaj yeem txhim kho qhov zoo ntawm cov txheej char.
2. AHP + MCA Ua Ke
Cov xwm txheej siv tau: UL94 V-0 qhov yuav tsum tau ua, lub hom phiaj rau cov tshuaj ntxiv tsawg nrog cov roj-theem hluav taws kub synergy.
Cov qauv pom zoo:
- Roj hmab puag: VMQ (100 phr)
- Aluminium hypophosphite (AHP): 12–15 phr
- Muab cov phosphorus, txhawb kev tsim cov char.
- MCA: 8–10 phr
- Cov pa roj nitrogen sib koom ua ke nrog AHP (PN effect), tso tawm cov pa roj inert (piv txwv li, NH₃) los tswj cov nplaim taws kis.
- Cov khoom siv txhawb zog: Fumed silica (10 phr)
- Cov Khoom Ntxiv: Silane coupling agent (1 phr, txhim kho kev sib kis) + curing agent
Cov yam ntxwv:
- Tag nrho cov tshuaj tiv thaiv hluav taws kub: ~ 20–25 phr, qis dua li AHP ib leeg.
- MCA txo cov tshuaj AHP tab sis tej zaum yuav cuam tshuam me ntsis rau qhov pom tseeb (pom zoo kom siv nano-MCA yog tias xav tau qhov pom tseeb).
3. Kev Sib Piv Cov Qauv Tseem Ceeb
| Kev tsim cov qauv | Kev Tiv Thaiv Hluav Taws Xob Uas Xav Tau | Tag Nrho Cov Tshuaj (phr) | Zoo thiab Tsis Zoo |
|---|---|---|---|
| AHP ib leeg xwb (20 phr) | UL94 V-1 | 20 | Yooj yim, pheej yig; V-0 xav tau ≥30 phr, nrog rau kev ua haujlwm poob qis. |
| AHP ib leeg xwb (30 phr) | UL94 V-0 | 30 | Muaj hluav taws kub heev tab sis muaj zog dua thiab elongation tsawg dua. |
| AHP 15 + MCA 10 | UL94 V-0 | 25 | Cov txiaj ntsig sib koom ua ke, kev ua tau zoo sib npaug - pom zoo rau kev sim thawj zaug. |
4. Cov Lus Qhia Txog Kev Sim
- Kev ntsuam xyuas ua ntej rau AHP + MCA (15+10 phr): Yog tias ua tiav V-0, maj mam txo AHP (piv txwv li, 12+10).
- Kev txheeb xyuas AHP ib leeg: Pib ntawm 20 phr, nce 5 phr rau ib qho kev xeem los ntsuam xyuas LOI thiab UL94, saib xyuas kev hloov pauv ntawm cov khoom siv kho tshuab.
- Cov kev xav tau kev tswj pa luam yeeb: Ntxiv 3–5 phr zinc borate rau cov qauv saum toj no kom txo tau pa luam yeeb yam tsis muaj kev cuam tshuam rau kev ua kom nplaim taws tsis kam.
5. Qee cov tshuaj Ammonium Polyphosphate uas tau coated
Peb muaj qee tus neeg siv khoom siv TF-201G rau roj hmab silicon tau zoo.
Rau kev ua kom zoo dua ntxiv, xav txog kev siv me me ntawm txhuas hydroxide (10–15 phr) los txo cov nqi tag nrho, txawm hais tias qhov no ua rau cov ntsiab lus ntawm cov khoom sau ntau ntxiv.
More inof., pls contact lucy@taifeng-fr.com
Lub sijhawm tshaj tawm: Lub Xya Hli-25-2025
