Ukwenziwa kwereferensi ye-silicone yerabha esekwe kwi-halogen-free flame retardants

Nazi ii-silicone eziyisihlanu zokuyilwa kwerabha yoyilo olusekwe kwi-halogen-free flame retardants, ebandakanya iiretardants zomlilo ezibonelelwa ngumthengi (i-aluminium hypophosphite, i-zinc borate, i-MCA, i-aluminium hydroxide, kunye ne-ammonium polyphosphate). Olu yilo lujolise ekuqinisekiseni ukutshatyalaliswa komlilo ngelixa kuncitshiswa izixa ezongezelelweyo zokunciphisa impembelelo kwiipropati zemishini yerabha ye-silicone.

1. I-Phosphorus-Nitrogen Synergistic System Retardant Flame (I-High-Efficiency High-Faciling Char-Forming Type)

Ekujoliswe kuko: UL94 V-0, umsi ophantsi, ofanelekileyo kwizicelo zokushisa okuphakathi ukuya phezulu

Irabha esisisekoIrabha ye-silicone ye-Methyl vinyl (VMQ, 100 phr)

IiRetardants zomlilo:

• I-Aluminiyam hypophosphite (AHP, i-phosphorus-based): 15 phr
• Ibonelela ngomthombo osebenzayo we-phosphorus, ikhuthaza ukubunjwa kwe-char, kwaye icinezela ukutshiswa kwesigaba segesi.
• I-Melamine cyanrate (MCA, i-nitrogen-based): 10 phr
• Isebenzisana ne-phosphorus, ikhupha iigesi ezingasebenziyo, kwaye idibanise ioksijini.
• Iborate yeZinc (ZnB): 5 phr
• Ikhuthaza ukwakheka kwe-char, icinezela umsi, kwaye yongeza uzinzo kwi-char layer.
• I-aluminium hydroxide (ATH, indlela yeekhemikhali, 1.6-2.3 μm): 20 phr
• Ukubola kwe-endothermic, ukunyanzeliswa komlilo oncedisayo, kunye nokuphucula ukusabalalisa.

Izongezo:

• Ioli ye-silicone ye-Hydroxyl (i-2 phr, iphucula ukuqhubekeka)
• Isilica evuthayo (10 phr, ukomelezwa)
• I-arhente yokunyanga (iDiperoxide, 0.8 phr)

Iimbonakalo:

• Iyonke i-flame retardant loading ~ 50 phr, ukulinganisa ukubuyiswa komlilo kunye neempawu zoomatshini.
• I-Phosphorus-nitrogen synergy (AHP + MCA) inciphisa inani elifunekayo le-flame retardants.

2. Isixokelelwano se-Intumescent Flame Retardant (Uhlobo lokuLayishwa okuPhantsi)

Ekujoliswe kuko: UL94 V-1 / V-0, ifanelekile kwiimveliso ezincinci

Irabha esisisekoI-VMQ (100 phr)

IiRetardants zomlilo:

• I-Ammonium polyphosphate (APP, i-phosphorus-nitrogen-based): 12 ph
• I-core of intumescent char formation, kunye nokuhambelana kakuhle kunye nerubha ye-silicone.
• I-Aluminiyam hypophosphite (AHP): 8 ph
• Umthombo we-phosphorus owongezelelweyo, wehlisa i-APP hygroscopicity.
• Iborate yeZinc (ZnB): 5 phr
• I-Synergistic char catalysis kunye noxinzelelo lwe-drip.
• Ialuminiyam hydroxide (umhlaba, 3–20 μm): 15 phr
• Ixabiso eliphantsi elincedisa i-flame retardant, linciphisa ukulayishwa kwe-APP.

Izongezo:

• Ioli ye-silicone yeVinyl (i-3 phr, iplastiki)
• Isilica enamanzi (15 phr, ukuqinisa)
• Inkqubo yokunyanga iPlatinum (0.1% Pt)

Iimbonakalo:

• Iyonke i-flame retardant loading ~ 40 phr, esebenzayo kwiimveliso ezibhityileyo ngenxa yendlela yokutshisa.
• I-APP idinga unyango olungaphezulu (umzekelo, i-agent yokudibanisa i-silane) ukuthintela ukufuduka.

3. Ukulayisha okuphezulu kweAluminiyam Hydroxide System (Uhlobo oluSebenzayo ngeendleko)

Ekujoliswe kuko: UL94 V-0, ilungele iimveliso ezishinyeneyo okanye iintambo

Irabha esisisekoI-VMQ (100 phr)

IiRetardants zomlilo:

• I-aluminium hydroxide (ATH, indlela yeekhemikhali, 1.6-2.3 μm): 50 phr
• I-primary flame retardant, i-endothermic decomposition, isayizi encinci ye-particle ukuze usasazeke ngcono.
• I-Aluminiyam hypophosphite (AHP): 5 phr
• Yandisa ukusebenza kakuhle kokwenziwa kwe-char, kunciphisa ukulayishwa kwe-ATH.
• Iborate yeZinc (ZnB): 3 phr
• Ukunciphisa umsi kunye nokuchasana nokuvutha.

Izongezo:

• I-arhente yokudibanisa iSilane (KH-550, 1 phr, iphucula i-ATH interface)
• Isilica evuthayo (8 phr, ukomelezwa)
• Ukunyanga iperoxide (DCP, 1 phr)

Iimbonakalo:

• Iyonke i-flame retardant loading ~ 58 phr, kodwa i-ATH ilawula ukusebenza kakuhle kweendleko.
• Ubungakanani besuntswana le-ATH elincinci linciphisa ukuphulukana namandla okuzibamba.

4. I-Standalone Aluminium Hypophosphite (AHP) System

Isicelo: UL94 V-1/V-2, okanye apho imithombo yenitrogen ingafunekiyo (umzekelo, ukuphepha ugwebu lwe-MCA oluchaphazela inkangeleko).

Uqulunqo olucetyiswayo:

• Irabha esisisekoI-VMQ (100 phr)
• I-Aluminiyam hypophosphite (AHP): 20–30 phr
• Umxholo wephosphorus ophezulu (40%); I-20 phr ibonelela nge- ~ 8% ye-phosphorus ye-basic flame retardancy.
• Kwi-UL94 V-0, ukunyuka ukuya kwi-30 phr (kunokuphazamisa iimpawu zomatshini).
• UkuQinisa Filler: I-Silica (10–15 phr, igcina amandla)
• Izongezo: Ioli ye-silicone ye-Hydroxyl (i-2 phr, i-processability) + i-arhente yokunyanga (i-Diperoxide okanye i-platinum system).

Iimbonakalo:

• Ithembele kwisigaba esincitshisiweyo sokubuyiswa komlilo (ukwenziwa kwe-char), iphucula ngokubonakalayo i-LOI kodwa inothintelo olulinganiselweyo lomsi.
• Ukulayisha okuphezulu (> 25 phr) kunokuqinisa izinto eziphathekayo; cebisa ukongeza i-3-5 phr ZnB ukuphucula umgangatho we-char.

5. I-Aluminiyam Hypophosphite (AHP) + I-MCA Blend

Isicelo: UL94 V-0, ukulayisha okuphantsi kunye ne-gas-phase flame retardant synergy.

Uqulunqo olucetyiswayo:

• Irabha esisisekoI-VMQ (100 phr)
• I-Aluminiyam hypophosphite (AHP): 12–15 phr
• Umthombo wePhosphorus wokwenziwa kwe-char.
• MCA: 8–10 phr
• Umthombo we-nitrogen we-PN synergy, ukhupha iigesi ezingasebenziyo (umz., NH₃) ukucinezela ukwanda kwedangatye.
• UkuQinisa Filler: Silika (10 phr)
• Izongezo: I-arhente yokudibanisa iSilane (1 phr, uncedo lokusasaza) + i-arhente yokunyanga.

Iimbonakalo:

• Iyonke i-flame retardant loading ~ 20–25 phr, isezantsi kakhulu kune-AHP ezimeleyo.
• I-MCA yehlisa imfuno ye-AHP kodwa inokuchaphazela kancinane ukungafihli (sebenzisa i-nano-MCA ukuba ingcaciso iyafuneka).

Flame Retardant Formulation Summary

Iingcebiso zoMfuniselo

1. UVavanyo oluPhambili: AHP + MCA (15+10 phr). Ukuba i-V-0 iphunyeziwe, nciphisa ngokuthe ngcembe i-AHP (umz., 12+10 phr).
2. Uvavanyo lwe-AHP oluzimeleyo: Qala kwi-20 phr, ukunyusa nge-5 phr ukuvavanya i-LOI kunye ne-UL94, ukubeka iliso kwiipropati zoomatshini.
3. Ukuthotywa komsi: Yongeza i-3–5 phr ZnB kuyo nayiphi na indlela yokuyila ngaphandle kokuphazamisa ukulibaziseka komlilo.
4. UPhuculo lweendleko: Faka i-10-15 phr ATH ukunciphisa iindleko, nangona ukulayishwa kwe-filler kukonyuka.

Inkqubo yokuxuba ecetyiswayo

(Irabha ye-silicone enamacandelo amabini)

1. Isiseko seRubber Pre-Treatment:

• Layisha irabha ye-silicone (umzekelo, i-107 gum, i-vinyl ioli ye-silicone) kwi-mixer yeplanethi, i-degas phantsi kwe-vacuum xa ifuneka.

1. Ukongezwa kweFlame Retardant:

• Iiretadanti zomgubo owenziwe ngumgubo (umz., ATH, MH):
• Yongeza kwiibhetshi, udibanise kwangaphambili kunye ne-rubber yesiseko (i-low-speed mixing, i-10-15 min) ukuphepha i-agglomeration.
• Yomisa kwi-80-120 ° C ukuba i-hygroscopic.
• Iiretadanti zolwelo zomlilo (umz., iiphosphates):
• Ukudibanisa ngokuthe ngqo ngeoli ye-silicone, i-crosslinker, njl., phantsi kwe-shear ephezulu (i-20-30 min).

1. Ezinye izongezo:

• Ngokulandelelana ukongeza iifayili (umzekelo, i-silica), i-crosslinker (i-hydrosilane), i-catalyst (i-platinum), kunye ne-inhibitors.

1. I-Homogenization:

• Lungisa ngakumbi ukusasazwa usebenzisa i-mill-roll okanye i-high-shear emulsifier (ibaluleke kakhulu kwi-nano-additives njenge-CNTs).

1. Ukukhupha amanzi kunye noHlelo:

• I-degas ye-vacuum (-0.095 MPa, i-30 min), isihluzo kwiimfuno zococeko oluphezulu.

Iingqwalasela ezingundoqo

• UKhetho lwe-Flame Retardant:
• I-halogen-free retardants (umzekelo, i-ATH) ifuna ubungakanani be-particle (1-5 μm); ukulayisha ngokugqithisileyo kulimaza iimpawu zoomatshini.
• I-silicone-based retardants (umzekelo, i-phenyl silicone resins) inikezela ukuhambelana okungcono kodwa ngexabiso eliphezulu.
• Ulawulo Lwenkqubo:
• Iqondo lobushushu ≤ 60 ° C (inqanda i-platinum catalyst poisoning okanye ukunyanga kwangaphambi kwexesha).
• Umswakama ≤ 50% RH (ugwema ukuphendula phakathi kweoli ye-silicone ye-hydroxyl kunye ne-flame retardants).

Ukuqukumbela

• Imveliso enkulu: Ukudibanisa kwangaphambili i-retardants ye-flame kunye ne-rubber yesiseko ukuze usebenze kakuhle.
• IiMfuno eziZinzo eziphezulu: Hlanganisa ngexesha lokudibanisa ukunciphisa imingcipheko yokugcina.
• IiNkqubo zokuTyalwa kweNano-Flame: Ukusasazwa okunyanzelekileyo kwe-high-chear ukukhusela i-agglomeration.

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