Ase hɔ no yɛ papi . a wɔyɛ no.
Wɔyɛ Papi (MDI) wɔ ɔkwan koro no ara so sɛ MDI gye sɛ aniline dodow a ɛwɔ hydrochloric acid mu no yɛ ketewaa. Wɔde yɛ PAPI ne MDI a ɛte sɛ MDI no wɔ anammɔn abien mu{2}} nea edi kan no, aniline ne formaldehyde solution (formalin) a wɔde formedhyde solution (formalin) no ayɛ no nsu a wɔde di dwuma no yɛ nea wɔde di dwuma wɔ ɔkwan bi so a wɔde di dwuma wɔ ɔkwan a ɛyɛ den so phosgenation reaction Sɛ wobenya papi. wɔ polyamine nnuru a wɔde yɛ adwuma no mu a, wɔhwɛ diamine a ɛwɔ mu no so sɛ ɛbɛyɛ bɛyɛ 50%. Mpɛn pii no, wobetumi anya denam nsakrae a wɔbɛyɛ wɔ dodow a wɔde hyɛ aniline ne formaldehyde dodow a wɔde yɛ nneɛma abien no mu no mu, kyerɛ sɛ, bere a wɔde wɔn ho ahyɛ mu no, wɔde wɔn ho ahyɛ mu: 50% a diamine wɔ synthesized polyamine compound no wɔ hɔ. Enti, raw material group kyekyɛ ratio, mpɛn pii no aniline ne formaldehyde dodow ratio yɛ 1{13}}6 kosi 2. range of O nsakrae, afoforo adwumayɛ tebea horow ma polyamine synthesis yɛ nea ɛte sɛ mdai a ɛyɛ adwuma no{16} a ɛyɛ a ɛyɛ a MDI{ 60% kosi 75% diamine, na ade titiriw no nso yɛ nea wonya denam nsakrae a ɛba wɔ aniline ne formaldehyde a wɔde ahyɛ mu no dodow a wɔsakra mu. bere a aniline/formaldehyde ade dodow no dodow yɛ 4/1.4 no, diamine aduru no bɛyɛ 75%. Mpɛn pii no, wɔfa ɔkwan a wɔfa so yɛ MDI ne PAPI no bom.