Polyurethane AB Adhesive Powder Flame Retardant Formulations

Polyurethane AB Adhesive Powder Flame Retardant Formulations
Da lori ibeere fun awọn ilana idapada ina-ọfẹ halogen fun awọn adhesives polyurethane AB, ni idapo pẹlu awọn abuda ati awọn ipa amuṣiṣẹpọ ti awọn retardants ina gẹgẹbi aluminiomu hypophosphite (AHP), aluminiomu hydroxide (ATH), borate zinc, ati melamine cyanurate (MCA), awọn eto idapọmọra mẹta ti o tẹle jẹ apẹrẹ. Awọn agbekalẹ wọnyi ko ni chlorine ati idojukọ lori jijẹ ṣiṣe ṣiṣe idaduro ina, ibaramu iṣẹ ṣiṣe ti ara, ati iṣeeṣe ilana:

1. Ilana Idaduro Ina giga (Fun ẹrọ itanna, fifin batiri, afojusun UL94 V-0)

Apapọ Idaduro Ina Ina:

• Aluminiomu hypophosphite (AHP): 8-12 phr (iru omi ti a bo polyurethane ti a ṣe iṣeduro lati koju awọn ọran ojoriro)
• Aluminiomu hydroxide (ATH): 20-25 phr (submicron grade, 0.2-1.0 μm, lati jẹki itọka atẹgun ati iwapọ ẹwa)
• MCA: 5-8 phr (ọna ẹrọ gaasi-ipele, amuṣiṣẹpọ pẹlu AHP ni ipele ti di di)
• Zinc borate: 3-5 phr (ṣe igbega dida awọn eedu seramiki ati idilọwọ sisun)

Iṣe Ti Oreti:

• Atẹgun atẹgun (LOI): ≥32% (PU mimọ ≈22%);
• UL94 Rating: V-0 (1.6 mm sisanra);
• Imudara ti o gbona: 0.45-0.55 W / m · K (ti ṣe alabapin nipasẹ ATH ati borate zinc);
• Iṣakoso viscosity: 25,000-30,000 cP (itọju oju ti o nilo lati dena isọdi).

Ilana bọtini:

• AHP gbọdọ wa ni tituka tẹlẹ ni paati polyol (Apakan A) lati yago fun iṣesi ti tọjọ pẹlu isocyanate (Apá B);
• ATH yẹ ki o ṣe atunṣe pẹlu aṣoju asopọ silane (fun apẹẹrẹ, KH-550) lati jẹki isunmọ aarin.

2. Kekere-iye owo Gbogbogbo Formulation (Fun ikole lilẹ, aga imora, afojusun UL94 V-1)

Apapọ Idaduro Ina Ina:

• Aluminiomu hydroxide (ATH): 30-40 phr (micron-grade standard, iye owo-doko, filler-type flame retardant);
• Ammonium polyphosphate (APP): 10-15 phr (ni idapo pelu MCA fun eto intumescent, rọpo awọn aṣoju halogenated);
• MCA: 5-7 phr (ipin si APP 1: 2 ~ 1: 3, ṣe igbelaruge foomu ati iyasọtọ atẹgun);
• Zinc borate: 5 phr (idinku ẹfin, dida eedu iranlọwọ).

Iṣe Ti Oreti:

• LOI: ≥28%;
• UL94 igbelewọn: V-1;
• Idinku iye owo: ~ 30% (ti a ṣe afiwe si ilana imuduro ina-giga);
• Idaduro agbara fifẹ: ≥80% (APP nilo encapsulation lati dena hydrolysis).

Ilana bọtini:

• APP gbọdọ jẹ microencapsulated (fun apẹẹrẹ, pẹlu melamine-formaldehyde resini) lati yago fun gbigba ọrinrin ati iṣelọpọ ti nkuta;
• Ṣafikun 1-2 phr hydrophobic fumed silica (fun apẹẹrẹ, Aerosil R202) fun ilodi si.

3. Kekere-Viscosity Easy-ilana Fọọmù (Fun konge itanna imora, to nilo ga flowability)

Apapọ Idaduro Ina Ina:

• Aluminiomu hypophosphite (AHP): 5-8 phr (nanosized, D50 ≤1 μm);
• Idaduro ina irawọ owurọ Organic olomi (aṣayan BDP): 8-10 phr (fun apẹẹrẹ, awọn itọsẹ DMMP ti o da lori irawọ owurọ ti halogen, mimu iki mọ);
• Aluminiomu hydroxide (ATH): 15 phr (apapo alumina ti iyipo, iwọntunwọnsi iṣesi igbona);
• MCA: 3-5 phr.

Iṣe Ti Oreti:

• Iwọn viscosity: 10,000-15,000 cP (sunmọ si awọn ọna ṣiṣe idaduro ina olomi);
• Idaduro ina: UL94 V-0 (ti mu dara nipasẹ irawọ owurọ olomi);
• Imudara ti o gbona: ≥0.6 W / m · K (ti ṣe alabapin nipasẹ alumina iyipo).

Ilana bọtini:

• AHP ati alumina iyipo gbọdọ wa ni idapọpọ ati tuka labẹ irẹrun giga (≥2000 rpm);
• Ṣafikun 4-6 phr molecular sieve desiccant si Apá B lati ṣe idiwọ gbigba ọrinrin AHP.

4. Compounding Technical Points & Yiyan Solutions

1. Awọn ilana Amuṣiṣẹpọ:

• AHP + MCA:AHP n ṣe agbega gbígbẹ ati gbigba agbara, lakoko ti MCA ṣe itusilẹ gaasi nitrogen lori alapapo, ti o n ṣe fẹlẹfẹlẹ oyin-oyin kan.
• ATH + Zinc borate:ATH ngba ooru (1967 J/g), ati zinc borate ṣe apẹrẹ gilasi borate lati bo oju.

2. Awọn Idaduro Ina Idakeji:

• Awọn itọsẹ Polyphosphazene:Ṣiṣe-giga ati ore-ọrẹ, pẹlu lilo HCl nipasẹ ọja;
• Resini silikoni Epoxy (ESR):Nigbati a ba ni idapo pẹlu AHP, o dinku ikojọpọ lapapọ (18% fun V-0) ati ilọsiwaju awọn ohun-ini ẹrọ.

3. Iṣakoso Ewu ilana:

• Sedimentation:Awọn aṣoju atako-farabalẹ (fun apẹẹrẹ, awọn oriṣi polyurea-ti a tunṣe) nilo ti iki <10,000 cP;
• Idinamọ imularada:Yago fun awọn idapada ina alkaline pupọ (fun apẹẹrẹ, MCA) lati ṣe idiwọ kikọlu pẹlu awọn aati isocyanate.

5. Awọn iṣeduro imuse

• Ṣe iṣaju idanwo ilana imuduro ina-giga: AHP + submicron ATH ti a bo (iwọn patikulu apapọ 0.5 μm) ni AHP:ATH:MCA = 10:20:5 fun iṣapeye akọkọ.
• Awọn idanwo bọtini:
  → LOI (GB/T 2406.2) ati sisun inaro UL94;
  → Agbara adehun lẹhin gigun kẹkẹ gbona (-30 ℃ ~ 100 ℃, awọn wakati 200);
  → Ojoriro ina retardant lẹhin isare ti ogbo (60 ℃/7d).

Flame Retardant Table agbekalẹ