Polyurethane AB Adhesive Hmoov Nplaum Hluav Taws Kub Retardant Formulations

Polyurethane AB Adhesive Hmoov Nplaum Hluav Taws Kub Retardant Formulations
Raws li qhov kev thov rau cov qauv tshuaj tua hluav taws uas tsis muaj halogen rau polyurethane AB adhesives, ua ke nrog cov yam ntxwv thiab cov teebmeem synergistic ntawm cov tshuaj tua hluav taws xws li txhuas hypophosphite (AHP), txhuas hydroxide (ATH), zinc borate, thiab melamine cyanurate (MCA), peb cov qauv sib xyaw ua ke hauv qab no tau tsim. Cov qauv no tsis muaj chlorine thiab tsom mus rau kev ua kom zoo dua ntawm kev ua haujlwm ntawm cov tshuaj tua hluav taws, kev sib raug zoo ntawm lub cev, thiab kev ua tau ntawm cov txheej txheem:

1. Kev Tsim Khoom Uas Tiv Thaiv Tau Hluav Taws Kub Siab (Rau kev siv hluav taws xob potting, roj teeb encapsulation, lub hom phiaj UL94 V-0)

Kev Sib Xyaws Ua Ke Hluav Taws Kub Tseem Ceeb:

• Aluminium hypophosphite (AHP): 8-12 phr (hom polyurethane-coated uas ntws los ntawm dej pom zoo kom daws cov teeb meem nag lossis daus)
• Aluminium hydroxide (ATH): 20-25 phr (qib submicron, 0.2-1.0 μm, los txhim kho cov pa oxygen thiab cov char compactness)
• MCA: 5-8 phr (lub tshuab ua pa roj, ua haujlwm nrog AHP hauv theem sib xyaw)
• Zinc borate: 3-5 phr (txhawb kev tsim cov char ceramic thiab tiv thaiv kev kub hnyiab)

Kev Ua Tau Zoo Uas Xav Tau:

• Cov pa oxygen index (LOI): ≥32% (PU ntshiab ≈22%);
• UL94 qib: V-0 (1.6 hli tuab);
• Kev ua kom sov: 0.45-0.55 W/m·K (pab los ntawm ATH thiab zinc borate);
• Kev tswj qhov viscosity: 25,000-30,000 cP (kev kho qhov chaw yuav tsum tau ua kom tsis txhob muaj av qeeg).

Cov Txheej Txheem Tseem Ceeb:

• AHP yuav tsum tau muab faib ua ntej hauv cov khoom polyol (Ntu A) kom tsis txhob muaj kev cuam tshuam ua ntej nrog isocyanate (Ntu B);
• ATH yuav tsum tau hloov kho nrog tus neeg sawv cev silane coupling (piv txwv li, KH-550) los txhim kho kev sib txuas ntawm cov interfacial.

2. Cov Qauv Pheej Yig (Rau kev kaw kev tsim kho, kev sib txuas rooj tog, lub hom phiaj UL94 V-1)

Kev Sib Xyaws Ua Ke Hluav Taws Kub Tseem Ceeb:

• Aluminium hydroxide (ATH): 30-40 phr (qib micron txheem, pheej yig, hom filler-hom nplaim retardant);
• Ammonium polyphosphate (APP): 10-15 phr (ua ke nrog MCA rau lub kaw lus intumescent, hloov cov neeg sawv cev halogenated);
• MCA: 5-7 phr (piv rau APP 1:2~1:3, txhawb kev ua npuas dej thiab kev rho tawm oxygen);
• Zinc borate: 5 phr (tswj pa luam yeeb, tsim cov char ntxiv).

Kev Ua Tau Zoo Uas Xav Tau:

• LOI: ≥28%;
• UL94 qib: V-1;
• Txo nqi: ~ 30% (piv rau cov qauv uas tiv taus hluav taws kub heev);
• Lub zog tensile khaws cia: ≥80% (APP xav tau encapsulation kom tiv thaiv hydrolysis).

Cov Txheej Txheem Tseem Ceeb:

• APP yuav tsum tau microencapsulated (piv txwv li, nrog melamine-formaldehyde resin) kom tsis txhob nqus dej noo thiab ua npuas;
• Ntxiv 1-2 phr hydrophobic fumed silica (piv txwv li, Aerosil R202) rau kev tiv thaiv kev sib sau ua ke.

3. Kev Tsim Khoom Uas Yooj Yim Rau Kev Ua Kom Yooj Yim (Rau kev sib txuas lus hluav taws xob kom raug, xav tau kev ntws siab)

Kev Sib Xyaws Ua Ke Hluav Taws Kub Tseem Ceeb:

• Aluminium hypophosphite (AHP): 5-8 phr (nanosized, D50 ≤1 μm);
• Cov kua organic phosphorus nplaim taws retardant (BDP lwm txoj): 8-10 phr (piv txwv li, halogen-free phosphorus-based DMMP derivatives, tswj viscosity);
• Aluminium hydroxide (ATH): 15 phr (spherical alumina composite, sib npaug thermal conductivity);
• MCA: 3-5 phr.

Kev Ua Tau Zoo Uas Xav Tau:

• Qhov ntau ntawm viscosity: 10,000-15,000 cP (ze rau cov kua hluav taws kub retardant systems);
• Hluav taws kub tsis kam: UL94 V-0 (txhim kho los ntawm cov kua phosphorus);
• Kev ua tau zoo ntawm cov cua sov: ≥0.6 W/m·K (pab los ntawm alumina kheej kheej).

Cov Txheej Txheem Tseem Ceeb:

• AHP thiab spherical alumina yuav tsum tau sib xyaw ua ke thiab tawg ua tej daim me me hauv qab high shear (≥2000 rpm);
• Ntxiv 4-6 phr molecular sieve desiccant rau hauv Tshooj B kom tiv thaiv AHP nqus dej noo.

4. Kev Sib Xyaws Cov Ntsiab Lus Txuj Ci & Lwm Txoj Kev Daws Teeb Meem

1. Cov Txheej Txheem Sib Koom Tes:

• AHP + MCA:AHP ua rau lub cev qhuav dej thiab kub hnyiab, thaum MCA tso cov pa nitrogen thaum cua sov, ua rau muaj txheej char zoo li honeycomb.
• ATH + Zinc borate:ATH nqus cua sov (1967 J/g), thiab zinc borate tsim ib txheej iav borate los npog qhov chaw.

2. Lwm Cov Tshuaj Tiv Thaiv Hluav Taws:

• Cov tshuaj polyphosphazene derivatives:Kev ua haujlwm zoo thiab tus phooj ywg ib puag ncig, nrog rau kev siv HCl los ntawm cov khoom lag luam;
• Cov roj hmab epoxy silicone (ESR):Thaum ua ke nrog AHP, nws txo tag nrho cov kev thauj khoom (18% rau V-0) thiab txhim kho cov khoom siv kho tshuab.

3. Kev Tswj Xyuas Kev Pheej Hmoo ntawm Cov Txheej Txheem:

• Kev ua kom av noo:Cov tshuaj tiv thaiv kev tawg (piv txwv li, cov hom polyurea-modified) xav tau yog tias viscosity <10,000 cP;
• Kev txwv tsis pub kho:Tsis txhob siv cov tshuaj alkaline flame retardants ntau dhau (piv txwv li, MCA) kom tiv thaiv kev cuam tshuam rau cov tshuaj isocyanate.

5. Cov Lus Qhia Txog Kev Siv

• Muab qhov tseem ceeb rau kev sim cov qauv uas tiv taus hluav taws kub: coated AHP + submicron ATH (qhov nruab nrab ntawm cov khoom me me 0.5 μm) ntawm AHP:ATH:MCA = 10:20:5 rau kev ua kom zoo dua thawj zaug.
• Cov kev ntsuam xyuas tseem ceeb:
  → LOI (GB/T 2406.2) thiab UL94 ntsug hlawv;
  → Lub zog sib txuas tom qab kev caij tsheb kauj vab thermal (-30 ℃ ~ 100 ℃, 200 teev);
  → Cov dej nag uas tiv taus hluav taws tom qab laus sai (60 ℃ / 7d).

Cov Lus Qhia Txog Kev Ua Hluav Taws Kub