imwe nzira ye silicone rabha inogadzirwa yakavakirwa pazvinodzivirira moto zvisina halogen

Heano magadzirirwo mashanu erabha resilicone rabha akavakirwa pazvinodzivirira moto zvisina halogen, zvinosanganisira zvinodzivirira moto zvinopihwa nemutengi (aluminium hypophosphite, zinc borate, MCA, aluminium hydroxide, uye ammonium polyphosphate). Magadzirirwo aya anovavarira kuve nechokwadi chekuti moto hauchachinji ukuwo achideredza huwandu hwekuwedzera kuti aderedze kukanganiswa kwesimba rerabha resilicone.

1. Sisitimu yeFhosphorus-Nitrogen Synergistic Flame Retardant (Rudzi rweChar-Forming Runoshanda Zvakanyanya)

Chinangwa: UL94 V-0, utsi hushoma, hwakakodzera kushandiswa pakupisa kwepakati nepakati kusvika pakupisa kwepamusoro

Rabha Yekutanga: Rabha yesimbi yesimbi yeMethyl vinyl silicone (VMQ, 100 phr)

Zvinodzivirira Murazvo:

• Aluminum hypophosphite (AHP, yakavakirwa paphosphorus): 15 phr
• Inopa phosphorus inoshanda zvakanaka, inokurudzira kuumbwa kwecha, uye inoderedza kupisa kwegasi.
• Melamine cyanurate (MCA, yakavakirwa panitrogen): 10 phr
• Inoshanda pamwe chete nephosphorus, inoburitsa magasi asina simba, uye inoderedza okisijeni.
• Zinc borate (ZnB): 5 phr
• Inokurudzira kuumbwa kwechar, inodzvinyirira utsi, uye inowedzera kugadzikana kwechar layer.
• Aluminium hydroxide (ATH, nzira yemakemikari, 1.6–2.3 μm): 20 phr
• Kuora kwe endothermic, kunonoka kwemurazvo wemoto, uye kupararira kuri nani.

Zvimwe zvinowedzerwa:

• Oiri yeHydroxyl silicone (2 phr, inovandudza mashandiro)
• Silica yakafurwa (10 phr, kusimbisa)
• Mushonga unorapa (Diperoxide, 0.8 phr)

Zvinhu zvirimo:

• Kutakura kwese kwemuto unodzivirira moto kusvika pa50 phr, kuyera kunonoka kwemuto uye hunhu hwemakanika.
• Kubatana kwePhosphorus-nitrogen (AHP + MCA) kunoderedza huwandu hunodiwa hwezvinodzivisa moto zvega zvega.

2. Sisitimu Inodzivirira Moto Inopinda Mukati (Rudzi Rusina Kutakura)

Chinangwa: UL94 V-1/V-0, yakakodzera zvigadzirwa zvitete

Rabha Yekutanga: VMQ (mapepa zana)

Zvinodzivirira Murazvo:

• Ammonium polyphosphate (APP, yakavakirwa paphosphorus-nitrogen): 12 phr
• Chinoumba char mukati medumbu, chinoenderana zvakanaka nerabha resilicone.
• Aluminum hypophosphite (AHP): 8 phr
• Kunobva phosphorus yekuwedzera, kunoderedza APP hygroscopicity.
• Zinc borate (ZnB): 5 phr
• Kushandiswa kwesimba remagetsi (synergistic char catalysis) uye kudzvinyirirwa kwemadonhwe.
• Aruminiyamu hydroxide (yakakuyiwa, 3–20 μm): 15 phr
• Chinodzivirira moto chinodhura zvishoma, chinoderedza kurodha kweAPP.

Zvimwe zvinowedzerwa:

• Oiri yevinyl silicone (3 phr, plasticization)
• Silica yakanyungudika (15 phr, kusimbisa)
• Sisitimu yekurapa yeplatinamu (0.1% Pt)

Zvinhu zvirimo:

• Kutakura kwese kunodzora moto kunosvika 40 phr, kunoshanda pazvigadzirwa zvitete nekuda kwesimba remudumbu.
• APP inoda kugadziriswa pamusoro (semuenzaniso, silane coupling agent) kudzivirira kutama.

3. Sisitimu Yakagadziriswa yeAluminium Hydroxide Yakanyanya Kutakura (Rudzi Runoshanda)

Chinangwa: UL94 V-0, yakakodzera zvigadzirwa kana tambo dzakakora

Rabha Yekutanga: VMQ (mapepa zana)

Zvinodzivirira Murazvo:

• Aluminium hydroxide (ATH, nzira yemakemikari, 1.6–2.3 μm): 50 phr
• Chinhu chinodzora moto zvakanyanya, kuora kwe endothermic, saizi diki yezvikamu kuti zvipararire zviri nani.
• Aluminum hypophosphite (AHP): 5 phr
• Inowedzera kushanda zvakanaka kwekugadzirwa kwechar, inoderedza kurodha kweATH.
• Zinc borate (ZnB): 3 phr
• Kuderedza utsi uye kudzivirira kupenya.

Zvimwe zvinowedzerwa:

• Mushonga wekubatanidza Silane (KH-550, 1 phr, unovandudza interface yeATH)
• Silica yakafurwa (8 phr, kusimbisa)
• Kurapa kweperoxide (DCP, 1 phr)

Zvinhu zvirimo:

• Mari yose inodzoreredza moto inosvika ~58 phr, asi ATH ndiyo inonyanya kukosha pakushandisa mari zvakanaka.
• Saizi diki yeATH particles inoderedza kurasikirwa nesimba rekusimba.

4. Sisitimu yeAluminium Hypophosphite (AHP) yega yega

Kushandiswa: UL94 V-1/V-2, kana uko manyuko enitrogen asingadiwi (semuenzaniso, kudzivirira furo reMCA rinokanganisa chitarisiko).

Kugadzirwa Kunokurudzirwa:

• Rabha Yekutanga: VMQ (mapepa zana)
• Aluminum hypophosphite (AHP): 20–30 ph
• Kuwanda kwephosphorus (40%); 20 ph inopa ~8% phosphorus kuti irambe ichibvira moto.
• Pa UL94 V-0, wedzera kusvika pa30 phr (zvinogona kukanganisa hunhu hwemakanika).
• Kusimbisa Kuzadza: Silica (10–15 phr, inochengetedza simba)
• Zvimwe zvinowedzerwa: Hydroxyl silicone oiri (2 phr, kugona kwayo kugadzikiswa) + mushonga unorapa (Diperoxide kana platinum system).

Zvinhu zvirimo:

• Inoshandisa kunonoka kwemurazvo wemoto (condensed-phase flame retardancy) (kuumbwa kwechar), inovandudza zvikuru LOI asi ine kudzikamisa utsi zvishoma.
• Kutakura kwakanyanya (>25 phr) kunogona kuomesa chinhu chacho; ndinokurudzira kuwedzera 3–5 phr ZnB kuti ivandudze kunaka kwechar.

5. Aluminum Hypophosphite (AHP) + MCA Blend

Kushandiswa: UL94 V-0, ine mutoro wakaderera uye inoshanda pamwe chete nemagetsi anodzora moto.

Kugadzirwa Kunokurudzirwa:

• Rabha Yekutanga: VMQ (mapepa zana)
• Aluminum hypophosphite (AHP): 12–15 phr
• Phosphorus ndiyo inoumba char.
• MCA: 8–10 phr
• Nitrogen sosi yekubatana kwePN, inoburitsa magasi asina simba (semuenzaniso, NH₃) kudzvinyirira kupararira kwemurazvo.
• Kusimbisa Kuzadza: Silika (mapepa gumi)
• Zvimwe zvinowedzerwa: Mushonga wekubatanidza weSilane (1 phr, rubatsiro rwekupararira) + mushonga wekuporesa.

Zvinhu zvirimo:

• Kutakura kwese kunodzivirira moto kunosvika ~20–25 phr, kwakaderera zvakanyanya pane AHP yakazvimiririra.
• MCA inoderedza zvinodiwa neAHP asi inogona kukanganisa kujeka zvishoma (shandisa nano-MCA kana zvichidikanwa kujekesa).

Pfupiso yeKuumbwa kweMurazvo Unodzivirira Murazvo

Mazano Ekuyedza

1. Kuedzwa Kwekutanga: AHP + MCA (15+10 phr). Kana V-0 ikawanikwa, deredza AHP zvishoma nezvishoma (semuenzaniso, 12+10 phr).
2. Bvunzo reAHP rakazvimiririra: Tanga pa20 phr, wedzera ne5 phr kuti uongorore LOI neUL94, uchitarisa hunhu hwemakanika.
3. Kudzvinyirira Utsi: Wedzera 3–5 phr ZnB kune chero fomura pasina kukanganisa kunonoka kwemurazvo.
4. Kugadzirisa Mutengo: Isa 10–15 phr ATH kuderedza mutengo, kunyangwe huwandu hwese hwekuzadza huchikwira.

Maitiro Ekusanganisa Anokurudzirwa

(Kuti uwane rabha resilicone rinogadzirisa zvinhu zviviri)

1. Kurapa Kwerabha Yekutanga:

• Isa rabha resilicone (semuenzaniso, 107 gum, vinyl silicone oil) mumuchina wekusanganisa planetary, wozoisa degas pasi pevacuum kana zvichidikanwa.

1. Kuwedzera Kunodzivirira Murazvo:

• Zvinhu zvinodzivisa moto zvine upfu (semuenzaniso, ATH, MH):
• Wedzerai mabheti, sanganisai nerabha yekutanga (musanganiswa wekukurumidza, maminetsi gumi kusvika gumi nemashanu) kudzivirira kuungana.
• Omesa pa 80–120°C kana yakapfava.
• Zvinodzora moto wemvura (semuenzaniso, phosphates):
• Sanganisa zvakananga nemafuta e-silicone, crosslinker, nezvimwewo, pasi pekuchekwa kwakanyanya (20-30 min).

1. Zvimwe Zvinowedzerwa:

• Wedzera zvinhu zvinozadza (semuenzaniso, silica), crosslinker (hydrosilane), catalyst (platinum), uye zvinodzivisa.

1. Kubatanidzwa kweHomogenization:

• Wedzera kunatsa kupararira uchishandisa chigayo chine mipumburu mitatu kana emulsifier ine shear yakawanda (yakakosha kune nano-additives senge CNTs).

1. Kubvisa mweya & Kusefa:

• Sefa yekubvisa gasi (-0.095 MPa, 30 min), inoenderana nezvinodiwa pakuchena kwakanyanya.

Zvinhu Zvikuru Zvekufunga nezvazvo

• Sarudzo Inodzivirira Murazvo:
• Zvinhu zvinodzora halogen (semuenzaniso, ATH) zvinoda saizi yezvidimbu zvidiki (1–5 μm); kurodha zvakanyanya kunokanganisa mashandiro emakanika.
• Zvinodzora simba zvesilicone (semuenzaniso, phenyl silicone resins) zvinopa kushanda zviri nani asi nemutengo wakakwira.
• Kudzora Maitiro:
• Tembiricha ≤ 60°C (inodzivirira chepfu yeplatinum catalyst kana kupera nguva isati yakwana).
• Hunyoro ≤ 50% RH (hunodzivirira kusangana pakati pemafuta e-hydroxyl silicone uye zvinodzivisa moto).

Mhedziso

• Kugadzirwa Kwakawanda: Sanganisa zvinhu zvinodzora moto nerabha yekutanga kuti zvishande zvakanaka.
• Zvinodiwa zveKugadzikana Kwakanyanya: Sanganisa panguva yekubatanidza zvinhu kuti uderedze njodzi dzekuchengetera.
• Masisitimu Anodzivisa Moto weNano: Zvinodiwa kuti zvidimbu zvipararire zvakanyanya kudzivirira kuungana kwevhu.

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