Hasi ni umusaruro wa Papi .
Papi (Crude MDI) yakozwe muburyo bumwe nka MDI usibye ko igipimo cya Acide kuri Acide ebyiri . ingano ya diamine iyobowe na aside lewis, hanyuma ikigo cya polyamine gitangizwa kuri papi {{3} {ibikubiye muri rusange, birashobora kugenzurwa muguhindura ibipimo bya polyamine, birashobora kugenzurwa no guhindura ibipimo byimibare ya polyamine, bigenzurwa nibikoresho bibiri bya aniline na formaldehyde, ni ukuvuga umubare wibintu . byamenyekanye cyane ko mugihe igipimo cya gice cya Aniline muri Forhomine kiboneka {{10% Ikigereranyo cya Diretike ya Aniline na formaldehyde ni 1. 6 kuri 2.}}}}}} insine ya o Aniline na formahyde ibikoresho byashizwemo . mugihe igipimo cyamafaranga ya aniline / folmadine ni 4/1 {22, Polyamine ikubiyemo 75% yikigo gigera kuri 75%. Mubisanzwe, inzira yo gufatanya kwa MDI na Papi byemewe.