mawonekedwe ena a mphira wa silikoni wotengera ma halogen-free flame retardants

Nawa mapangidwe asanu opangira mphira wa silicone kutengera zoletsa moto wopanda halogen, kuphatikiza zoletsa moto zoperekedwa ndi kasitomala (aluminium hypophosphite, zinki borate, MCA, aluminium hydroxide, ndi ammonium polyphosphate). Mapangidwe awa amafuna kuwonetsetsa kuchedwa kwa lawi ndikuchepetsa zowonjezera kuti muchepetse mphamvu yamakina a rabara ya silikoni.

1. Phosphorus-Nitrogen Synergistic Flame Retardant System (Mtundu Wopanga Char-Wochita Bwino Kwambiri)

Zolinga: UL94 V-0, utsi wochepa, woyenera ntchito zapakati-mpaka-kutentha kwambiri

Base Rubber: Methyl vinyl silicone rabala (VMQ, 100 phr)

Flame Retardants:

• Aluminium hypophosphite (AHP, phosphorous-based): 15 mph
• Amapereka gwero labwino la phosphorous, amathandizira kupanga char, komanso kupondereza kuyaka kwa gasi.
• Melamine cyanrate (MCA, nitrogen-based):10 mph
• Imalumikizana ndi phosphorous, imatulutsa mpweya wa inert, ndikuchepetsa mpweya.
• Zinc borate (ZnB): 5 mph
• Imalepheretsa mapangidwe a char, imachepetsa utsi, komanso imapangitsa kuti ma char azikhala okhazikika.
• Aluminium hydroxide (ATH, njira yamankhwala, 1.6-2.3 μm):20 mph
• Kuwola kwa Endothermic, kuchepa kwamoto wothandiza, komanso kufalikira kwabwino.

Zowonjezera:

• Mafuta a silikoni a Hydroxyl (2 phr, amathandizira kusinthika)
• Silika yamoto (10 phr, kulimbikitsa)
• Wochiritsa (Diperoxide, 0.8 phr)

Mawonekedwe:

• Kutsegula kwathunthu kwamoto wocheperako ~ 50 phr, kusayenda bwino kwa malawi ndi makina amakina.
• Phosphorus-nitrogen synergy (AHP + MCA) imachepetsa kuchuluka kofunikira kwa zoletsa moto.

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

Zolinga: UL94 V-1/V-0, yoyenera zinthu zoonda

Base Rubber: VMQ (100 phr)

Flame Retardants:

• Ammonium polyphosphate (APP, phosphorous-nitrogen-based):12 mph
• Core of intumescent char mapangidwe, yogwirizana bwino ndi mphira wa silicone.
• Aluminium hypophosphite (AHP):8 mph
• Gwero la phosphorous yowonjezera, imachepetsa hygroscopicity ya APP.
• Zinc borate (ZnB): 5 mph
• Synergistic char catalysis ndi kuponderezedwa kwa drip.
• Aluminium hydroxide (nthaka, 3-20 μm): 15 mph
• Zothandizira zotsika mtengo zothandizira lawi, zimachepetsa kutsitsa kwa APP.

Zowonjezera:

• Mafuta a vinyl silicone (3 phr, plasticization)
• Silika yamvula (15 phr, kulimbitsa)
• Dongosolo lakuchiritsa la platinamu (0.1% Pt)

Mawonekedwe:

• Kutsegula kwathunthu kwamoto ~ 40 phr, kothandiza pazinthu zoonda chifukwa cha makina opangira intumescent.
• APP imafuna chithandizo chapamwamba (mwachitsanzo, silane coupling agent) kuti ipewe kusamuka.

3. Makina Odzaza Aluminium Hydroxide Optimized System (Mtundu Wogwira Ntchito)

Zolinga: UL94 V-0, yoyenera zinthu zakuda kapena zingwe

Base Rubber: VMQ (100 phr)

Flame Retardants:

• Aluminium hydroxide (ATH, njira yamankhwala, 1.6-2.3 μm):50ph
• Pulayimale lawi retardant, endothermic kuwonongeka, yaing'ono tinthu kukula bwino kubalalitsidwa.
• Aluminium hypophosphite (AHP): 5 mph
• Imakulitsa luso la kupanga char, imachepetsa kutsitsa kwa ATH.
• Zinc borate (ZnB):3 mph
• Kuchepetsa utsi ndi anti-flawing.

Zowonjezera:

• Silane coupling agent (KH-550, 1 phr, imawongolera mawonekedwe a ATH)
• Silika yamoto (8 phr, kulimbikitsa)
• Kuchiritsa kwa peroxide (DCP, 1 phr)

Mawonekedwe:

• Kutsitsa kwathunthu kwamalawi amoto ~ 58 phr, koma ATH imayang'anira pakuwongolera mtengo.
• Kukula kwa tinthu tating'ono ta ATH kumachepetsa kuchepa kwamphamvu kwamphamvu.

4. Standalone Aluminium Hypophosphite (AHP) System

Kugwiritsa ntchito: UL94 V-1/V-2, kapena kumene magwero a nayitrogeni ndi osafunikira (mwachitsanzo, kupewa kuchita thovu kwa MCA kusokoneza maonekedwe).

Analimbikitsa Mapangidwe:

• Base Rubber: VMQ (100 phr)
• Aluminium hypophosphite (AHP)Nthawi: 20-30 mphindi
• Kuchuluka kwa phosphorous (40%); 20 phr imapereka ~ 8% phosphorous pakuchepetsa mphamvu yamoto.
• Kwa UL94 V-0, onjezerani mpaka 30 phr (ikhoza kuwononga makina).
• Kulimbitsa Filler: Silika (10-15 phr, imasunga mphamvu)
• ZowonjezeraMafuta a silicone a Hydroxyl (2 phr, processability) + wochiritsa (Diperoxide kapena platinamu system).

Mawonekedwe:

• Imadalira kubwezeredwa kwamoto kwa condensed-phase (kupangika kwa char), kumathandizira kwambiri LOI koma imakhala ndi utsi wochepa.
• Kutsitsa kwakukulu (> 25 phr) kumatha kuumitsa zinthu; limbikitsani kuwonjezera 3-5 phr ZnB kuti muwongolere khalidwe la Char.

5. Aluminium Hypophosphite (AHP) + MCA Blend

Kugwiritsa ntchito: UL94 V-0, kutsitsa pang'ono ndi mgwirizano woletsa moto wa gasi.

Analimbikitsa Mapangidwe:

• Base Rubber: VMQ (100 phr)
• Aluminium hypophosphite (AHP)Nthawi: 12-15 mphindi
• Phosphorous gwero la kupanga char.
• MCA: 8-10 mphindi
• Gwero la nayitrojeni la PN synergy, limatulutsa mpweya wa inert (mwachitsanzo, NH₃) kuletsa kufalikira kwa lawi.
• Kulimbitsa Filler: Silika (10 phr)
• Zowonjezera: Silane coupling agent (1 phr, chithandizo chobalalitsa) + wochiritsa.

Mawonekedwe:

• Kutsegula kwathunthu kwa malawi ~ 20–25 phr, kutsika kwambiri kuposa AHP yoyima.
• MCA imachepetsa kufunikira kwa AHP koma ingakhudze pang'ono kuwonekera (gwiritsani ntchito nano-MCA ngati kumveka kukufunika).

Chidule Chachidule cha Flame Retardant Formulation

Malangizo Oyesera

1. Kuyesedwa Kwambiri: AHP + MCA (15+10 phr). Ngati V-0 ikwaniritsidwa, chepetsani AHP pang'onopang'ono (mwachitsanzo, 12+10 phr).
2. Mayeso a Standalone AHPYambani pa 20 phr, yonjezerani ndi 5 phr kuti muyese LOI ndi UL94, kuyang'anira makina.
3. Kuletsa Utsi: Onjezani 3–5 phr ZnB pakupanga kulikonse popanda kusokoneza kuchedwa kwamoto.
4. Kukhathamiritsa Mtengo: Phatikizani 10-15 phr ATH kuti muchepetse mtengo, ngakhale kudzaza kwathunthu kumawonjezeka.

Analimbikitsa Kusakaniza Njira

(Kwa magawo awiri owonjezera-ochiritsa mphira wa silicone)

1. Chithandizo cha Base Rubber Pre-Treatment:

• Kwezani mphira wa silikoni (monga 107 chingamu, mafuta a vinyl silikoni) mu chosakaniza cha mapulaneti, degas pansi pa vacuum ngati pakufunika.

1. Flame Retardant Kuwonjezera:

• Zotsalira zaufa (monga ATH, MH):
• Onjezani magulu, sakanizani kale ndi mphira woyambira (kusakaniza kothamanga, 10-15 min) kuti mupewe kuphatikizika.
• Yanikani pa 80-120 ° C ngati hygroscopic.
• Zoletsa zamadzimadzi (monga ma phosphates):
• Sakanizani mwachindunji ndi mafuta a silicone, crosslinker, etc., pansi pa kukameta ubweya wambiri (20-30 min).

1. Zina Zowonjezera:

• Onjezani zodzaza motsatizana (mwachitsanzo, silika), crosslinker (hydrosilane), chothandizira (platinamu), ndi zoletsa.

1. Homogenization:

• Yenganinso kubalalitsidwa pogwiritsa ntchito mphero ya mipukutu itatu kapena emulsifier yometa ubweya wambiri (yofunikira pa nano-zowonjezera ngati CNTs).

1. Degassing & Sefa:

• Vacuum degas (-0.095 MPa, 30 min), fyuluta pazofunikira zoyenga kwambiri.

Mfundo zazikuluzikulu

• Kusankhidwa kwa Flame Retardant:
• Halogen wopanda retardants (mwachitsanzo, ATH) amafuna zabwino tinthu kukula (1-5 μm); Kukweza kwambiri kumawononga makina.
• Zotsalira za silicone (mwachitsanzo, phenyl silicone resins) zimapereka kuyanjana kwabwinoko koma pamtengo wokwera.
• Njira Control:
• Kutentha ≤ 60 ° C (amateteza platinamu poyizoni kapena kuchiza msanga).
• Chinyezi ≤ 50% RH (amapewa kuchitapo kanthu pakati pa hydroxyl silikoni mafuta ndi retardants lawi).

Mapeto

• Mass Production: Pre-sakanizani zobwezeretsanso moto zokhala ndi mphira woyambira kuti zitheke.
• Zofunikira Zokhazikika Kwambiri: Phatikizani panthawi yophatikiza kuti muchepetse zoopsa zosungirako.
• Nano-Flame Retardant Systems: Kuvomerezedwa kumeta ubweya wambiri kuti mupewe kuphatikizika.

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