qee qhov silicone roj hmab siv kev tsim qauv raws li cov nplaim hluav taws tsis muaj halogen

Ntawm no yog tsib txoj kev tsim cov roj hmab silicone raws li cov nplaim hluav taws tsis muaj halogen, suav nrog cov nplaim hluav taws uas muab los ntawm cov neeg siv khoom (aluminium hypophosphite, zinc borate, MCA, aluminium hydroxide, thiab ammonium polyphosphate). Cov qauv tsim no txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhuam nws nws nws yuav tsum tau tshem tawm cov roj hmab silicone.

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

Hom phiaj: UL94 V-0, tsis muaj pa luam yeeb, haum rau nruab nrab-rau-siab kub daim ntaub ntawv

Base Roj Hmab: Methyl vinyl silicone roj hmab (VMQ, 100 phr)

Nplaim Retardants:

• Aluminium hypophosphite (AHP, phosphorus-based):15 pw
• Muab cov phosphorus muaj txiaj ntsig zoo, txhawb kev tsim cov char, thiab suppresses roj-theem combustion.
• Melamine cyanurate (MCA, nitrogen-raws li):10 phn
• Synergizes nrog phosphorus, tso tawm inert gases, thiab dilutes oxygen.
• Zinc borate (ZnB)ua :5ph
• Catalyzes char tsim, suppresses pa luam yeeb, thiab txhim khu char txheej stability.
• Aluminium hydroxide (ATH, chemical method, 1.6-2.3 μm): 20 np
• Endothermic decomposition, auxiliary nplaim retardancy, thiab txhim kho dispersibility.

Cov tshuaj ntxiv:

• Hydroxyl silicone roj (2 phr, txhim kho cov txheej txheem)
• Fumed silica (10 phr, kev txhawb zog)
• Cov tshuaj tua kab mob (Diperoxide, 0.8 phr)

Nta:

• Tag nrho cov nplaim retardant loading ~ 50 phr, ntsuas nplaim retardancy thiab txhua yam khoom.
• Phosphorus-nitrogen synergy (AHP + MCA) txo qhov xav tau ntawm cov nplaim hluav taws kub nyhiab.

2. Intumescent Flame Retardant System (Low-Loading Type)

Hom phiajUL94 V-1 / V-0, haum rau cov khoom nyias

Base Roj Hmab: VMQ (100 phr)

Nplaim Retardants:

• Ammonium polyphosphate (APP, phosphorus-nitrogen-based):12 pw
• Core ntawm intumescent char tsim, nrog zoo compatibility nrog silicone roj hmab.
• Aluminium hypophosphite (AHP): 8 np
• Ntxiv phosphorus qhov chaw, txo APP hygroscopicity.
• Zinc borate (ZnB)ua :5ph
• Synergistic char catalysis thiab drip suppression.
• Aluminium hydroxide (hauv av, 3-20 μm):15 pw
• Tus nqi qis pab hluav taws kub retardant, txo APP loading.

Cov tshuaj ntxiv:

• Vinyl silicone roj (3 phr, plasticization)
• Precipitated silica (15 phr, ntxiv dag zog)
• Platinum curing system (0.1% Pt)

Nta:

• Tag nrho cov nplaim retardant loading ~ 40 phr, siv tau rau nyias cov khoom vim intumescent mechanism.
• APP yuav tsum tau kho deg (xws li, silane coupling tus neeg sawv cev) los tiv thaiv kev tsiv teb tsaws.

3. High-Loading Aluminium Hydroxide Optimized System (Cov nqi-zoo)

Hom phiaj: UL94 V-0, haum rau cov khoom tuab lossis cables

Base Roj Hmab: VMQ (100 phr)

Nplaim Retardants:

• Aluminium hydroxide (ATH, chemical method, 1.6-2.3 μm): 50 pw
• Thawj nplaim taws retardant, endothermic decomposition, me me particle loj rau zoo dispersion.
• Aluminium hypophosphite (AHP)ua :5ph
• Txhim kho char tsim efficiency, txo ATH loading.
• Zinc borate (ZnB)ua :3ph
• Kev haus luam yeeb tiv thaiv thiab tiv thaiv glowing.

Cov tshuaj ntxiv:

• Silane coupling tus neeg sawv cev (KH-550, 1 phr, txhim kho ATH interface)
• Fumed silica (8 phr, reinforcement)
• Peroxide kho (DCP, 1 phr)

Nta:

• Tag nrho cov nplaim retardant loading ~ 58 phr, tab sis ATH dominates rau nqi efficiency.
• Me me ATH particle loj txo qis tensile zog poob.

4. Standalone Aluminium Hypophosphite (AHP) System

Daim ntawv thov: UL94 V-1/V-2, los yog qhov twg nitrogen qhov chaw tsis xav tau (xws li, zam MCA foaming cuam tshuam cov tsos).

Pom zoo Formulation:

• Base Roj Hmab: VMQ (100 phr)
• Aluminium hypophosphite (AHP): 20–30 dr hab
• Cov ntsiab lus phosphorus siab (40%); 20 phr muab ~ 8% phosphorus rau cov nplaim taws retardancy.
• Rau UL94 V-0, nce mus rau 30 phr (tej zaum yuav cuam tshuam cov khoom siv dag zog).
• Txhim kho FillerSilica (10-15 phr, tuav lub zog)
• Cov tshuaj ntxiv: Hydroxyl silicone roj (2 phr, processability) + curing agent (Diperoxide lossis platinum system).

Nta:

• Relies on condensed-theem nplaim hluav taws retardancy (char formation), ho txhim kho LOI tab sis muaj txwv tsis pub haus luam yeeb.
• Kev thauj khoom siab (> 25 phr) tuaj yeem khov cov khoom; pom zoo ntxiv 3-5 phr ZnB los txhim kho char zoo.

5. Aluminium Hypophosphite (AHP) + MCA Blend

Daim ntawv thovUL94 V-0, tsis tshua muaj loading nrog roj-theem nplaim retardant synergy.

Pom zoo Formulation:

• Base Roj Hmab: VMQ (100 phr)
• Aluminium hypophosphite (AHP): 12–15 dr hab
• Phosphorus qhov chaw rau char tsim.
• MCA: 8–10 dr hab
• Nitrogen qhov chaw rau PN synergy, tso tawm inert gases (piv txwv li, NH₃) txhawm rau tua cov nplaim hluav taws.
• Txhim kho FillerTom ntej: Silica (10 phr)
• Cov tshuaj ntxiv: Silane coupling agent (1 phr, dispersion aid) + curing agent.

Nta:

• Tag nrho cov nplaim retardant loading ~ 20-25 phr, ho qis dua standalone AHP.
• MCA txo AHP qhov yuav tsum tau ua tab sis tej zaum yuav cuam tshuam me ntsis pob tshab (siv nano-MCA yog xav tau kom pom tseeb).

Flame Retardant Formulation Summary

Kev Pom Zoo

1. Kev Xeem Ua Ntej: AHP + MCA (15 + 10 phr). Yog tias V-0 ua tiav, maj mam txo AHP (piv txwv li, 12 + 10 phr).
2. Standalone AHP Test: Pib ntawm 20 phr, nce los ntawm 5 phr los ntsuas LOI thiab UL94, saib xyuas cov khoom siv kho tshuab.
3. Kev haus luam yeeb: Ntxiv 3-5 phr ZnB rau ib qho kev tsim yam tsis muaj kev cuam tshuam cov nplaim hluav taws.
4. Tus nqi Optimization: Muab 10-15 phr ATH kom txo tus nqi, txawm tias tag nrho cov khoom ntim khoom nce ntxiv.

Pom zoo txheej txheem sib tov

(Rau ob feem ntxiv-kho silicone roj hmab)

1. Base Rubber Kev Kho Mob Ua Ntej:

• Load silicone roj hmab (xws li, 107 gum, vinyl silicone roj) rau hauv lub ntiaj teb sib tov, degas hauv lub tshuab nqus tsev yog xav tau.

1. Nplaim Retardant Ntxiv:

• Powdered nplaim retardants (piv txwv li, ATH, MH):
• Ntxiv rau hauv cov khoom siv, ua ntej sib xyaw nrog cov roj hmab hauv paus (tsawg-ceev sib tov, 10-15 min) kom tsis txhob muaj kev sib txuam.
• Qhuav ntawm 80-120 ° C yog hygroscopic.
• Cov nplaim hluav taws ua kua (piv txwv li, phosphates):
• Sib tov ncaj qha nrog roj silicone, crosslinker, thiab lwm yam, nyob rau hauv siab shear (20-30 min).

1. Lwm yam Additives:

• Ntxiv cov fillers (piv txwv li, silica), crosslinker (hydrosilane), catalyst (platinum), thiab inhibitors.

1. Homogenization:

• Ntxiv refine dispersion siv peb-yob zeb los yog high-shear emulsifier (tseem ceeb rau nano-additives zoo li CNTs).

1. Degassing & Lim:

• Lub tshuab nqus tsev degas (-0.095 MPa, 30 min), lim rau siab purity yuav tsum.

Cov ntsiab lus tseem ceeb

• Nplaim Retardant Xaiv:
• Halogen-dawb retardants (xws li, ATH) yuav tsum tau zoo particle loj (1-5 μm); Kev thauj khoom ntau dhau ua rau muaj kev puas tsuaj rau cov khoom siv kho tshuab.
• Silicone-based retardants (piv txwv li, phenyl silicone resins) muab kev sib raug zoo dua tab sis tus nqi siab dua.
• Txheej txheem tswj:
• Kub ≤ 60 ° C (tiv thaiv platinum catalyst lom los yog kho ntxov ntxov).
• Cov av noo ≤ 50% RH (tsis txhob muaj kev cuam tshuam ntawm hydroxyl silicone roj thiab nplaim hluav taws).

Xaus

• Kev tsim khoom loj: Pre-mix nplaim retardants nrog lub hauv paus roj hmab rau efficiency.
• High-Stability Requirements: Sib tov thaum sib xyaw kom txo qis kev pheej hmoo cia.
• Nano-Nplaim Retardant Systems: Yuav tsum tau high-shear dispersion los tiv thaiv agglomeration.

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