Mafomu ePolyurethane AB Adhesive Powder Flame Retardant

Mafomu ePolyurethane AB Adhesive Powder Flame Retardant
Zvichienderana nekudiwa kwemafomula ekudzivirira moto asina halogen e polyurethane AB adhesives, pamwe chete nehunhu uye mhedzisiro yekubatana kwezvinodzivisa moto zvakaita sealuminium hypophosphite (AHP), aluminium hydroxide (ATH), zinc borate, uye melamine cyanurate (MCA), zvirongwa zvitatu zvinotevera zvekubatanidza zvakagadzirwa. Mafomula aya haana chlorine uye anotarisa pakuvandudza kushanda zvakanaka kwezvinodzivisa moto, kufambirana kwemuviri, uye kugona kwemaitiro:

1. Kugadzira Zvisina Kujeka Mumoto (Kuti uise muhari yemagetsi, kufukidza mabhatiri, chinangwa UL94 V-0)

Musanganiswa weCore Flame Retardant:

• Aluminum hypophosphite (AHP): 8-12 phr (rudzi rwe polyurethane-yakafukidzwa nemvura inokurudzirwa kugadzirisa matambudziko emvura)
• Aluminium hydroxide (ATH): 20-25 phr (submicron grade, 0.2-1.0 μm, yekuwedzera oxygen index uye char compactness)
• MCA: 5-8 phr (gas-phase mechanism, inoshanda pamwe chete neAHP muchikamu chakapfupikiswa)
• Zinc borate: 3-5 phr (inokurudzira kugadzirwa kwechar yeceramic uye inodzivirira kupfungaira)

Kushanda Kunotarisirwa:

• Okisijeni indekisi (LOI): ≥32% (PU yakachena ≈22%);
• Chiyero cheUL94: V-0 (ukobvu hwe1.6 mm);
• Kufambisa kwekupisa: 0.45-0.55 W/m·K (inopihwa neATH ne zinc borate);
• Kudzora kupenya: 25,000-30,000 cP (kurapa pamusoro kunodiwa kudzivirira kudonha kwevhu).

Maitiro Akakosha:

• AHP inofanira kuparadzirwa muchikamu chepolyol (Chikamu A) kudzivirira kusangana nekukurumidza neisocyanate (Chikamu B);
• ATH inofanira kuchinjwa ne silane coupling agent (semuenzaniso, KH-550) kuti iwedzere kubatana kwe interfacial.

2. Kugadzira Kwakajairika Kusingadhuri (Kuvhara kuvaka, kubatanidza fenicha, chinangwa UL94 V-1)

Musanganiswa weCore Flame Retardant:

• Aluminium hydroxide (ATH): 30-40 phr (yakajairwa micron-grade, isingadhuri, inodzora moto semuchina wekuzadza);
• Ammonium polyphosphate (APP): 10-15 phr (yakasanganiswa neMCA yesystem ye intumescent, ichitsiva halogenated agents);
• MCA: 5-7 phr (chiyero cheAPP 1:2~1:3, chinokurudzira furo uye kupatsanurwa kweokisijeni);
• Zinc borate: 5 phr (kudzora utsi, kuumbwa kwechani inobatsira).

Kushanda Kunotarisirwa:

• LOI: ≥28%;
• Chiyero cheUL94: V-1;
• Kuderedzwa kwemutengo: ~30% (zvichienzaniswa nekugadzirwa kwemafuta anononoka kupisa zvakanyanya);
• Kuchengetedza simba rekusimba: ≥80% (APP inoda kuvharwa kuti isanyunguduke).

Maitiro Akakosha:

• APP inofanira kunge yakavharirwa muzvikamu zvidiki (semuenzaniso, ne melamine-formaldehyde resin) kudzivirira kunyungudika kwehunyoro uye kuumbwa kwemabubbles;
• Wedzera 1-2 phr hydrophobic fumed silica (semuenzaniso, Aerosil R202) kuti idzivirire kugadzikana.

3. Kugadzira Zviri Nyore-Kusviba (Kuti ubatanidze electronics nemazvo, zvinoda kuyerera kwakanyanya)

Musanganiswa weCore Flame Retardant:

• Aluminum hypophosphite (AHP): 5-8 phr (yakakura, D50 ≤1 μm);
• Chinhu chinodzora moto chephosphorus yemvura (BDP imwe nzira): 8-10 phr (semuenzaniso, zvinhu zvinogadzirwa neDMMP zvisina halogen phosphorus, zvinochengetedza viscosity);
• Aluminium hydroxide (ATH): 15 phr (spherical alumina composite, inoenzanisa kupisa kwemhepo);
• MCA: 3-5 phr.

Kushanda Kunotarisirwa:

• Kuwanda kwesimba remagetsi: 10,000-15,000 cP (pedyo nemasisitimu emvura anodzora moto);
• Kusashanda kwemurazvo: UL94 V-0 (yakawedzerwa ne phosphorus yemvura);
• Kufambiswa kwemhepo nekupisa: ≥0.6 W/m·K (kunobva kualumina yakatenderera).

Maitiro Akakosha:

• AHP nealumina yakatenderera zvinofanira kusanganiswa pamwe chete uye kuparadzirwa pasi pekuchekwa kwakanyanya (≥2000 rpm);
• Wedzera 4-6 phr molecular sieve desiccant kuChikamu B kudzivirira kunyudzwa kwemvura neAHP.

4. Kubatanidza Mazano Ehunyanzvi & Mhinduro Dzimwe

1. Nzira dzeKubatsirana:

• AHP + MCA:AHP inokurudzira kupera mvura mumuviri uye kutsva, nepo MCA ichiburitsa gasi renitrogen painodziiswa, zvichiita kuti pave nechar layer yakaita sehuchi.
• ATH + Zinc borate:ATH inonwisa kupisa (1967 J/g), uye zinc borate inoumba girazi reborate kuti rifukidze pamusoro.

2. Zvimwe Zvinodzivirira Moto:

• Zvinobva muPolyphosphate:Inoshanda zvakanyanya uye isingakuvadzi nharaunda, ine kushandiswa kweHCl kubva pane zvigadzirwa;
• Epoxy silicone resin (ESR):Kana ikasanganiswa neAHP, inoderedza mutoro wese (18% yeV-0) uye inovandudza hunhu hwemakanika.

3. Kudzora Njodzi dzeMaitiro:

• Kucherwa kwevhu:Zvinodzivirira kugadzikana (semuenzaniso, mhando dzakagadziriswa nepolyurea) zvinodiwa kana viscosity iri pasi pe10,000 cP;
• Kurapa kudzivirirwa:Dzivisa zvinhu zvinoderedza moto zvine alkaline zvakanyanya (semuenzaniso, MCA) kudzivirira kukanganiswa kwemaitiro eisocyanate.

5. Mazano Ekushandisa

• Isa pakutanga kuyedza fomura inodzivirira moto zvakanyanya: yakaputirwa AHP + submicron ATH (avhareji yehukuru hwezvimedu 0.5 μm) paAHP:ATH:MCA = 10:20:5 kuti ugadzirise pakutanga.
• Miedzo mikuru:
  → LOI (GB/T 2406.2) uye UL94 vertical burning;
  → Simba rekubatana mushure mekutenderera kwekupisa (-30℃ ~ 100℃, maawa 200);
  → Mvura inodzima moto mushure mekukwegura nekukurumidza (60℃/7d).

Tafura Yekuumba Inodzoreredza Murazvo