THE ห้องเย็น DIARIES

Methylene Diphenyl Diisocyanate (MDI): MDIs are made with the phosgenation of your condensation item of aniline with formaldehyde. The most common isomer Utilized in polyurethane manufacturing is purified 4,four isomers. MDIs are generally Utilized in manufacturing rigid and semi-rigid polyurethane foams.There is a different FED 209E cleanroom clas