Chemistry Question #2248
Bruce MacKinnon, CET, a 38 year old male from Kitchener, Ont asks on September 16, 2004,
Is polyol used in the reaction of isocyantes (methylene diioscyante) the same compound as Glycerol?
viewed 13665 times
answered on September 20, 2004
Not necessarily. Methylene di-isocyanate reacts with any alcohol to form a a carbamate (urethane). If the alcohol is a diol, i.e. HO-organic-OH then a linear polymer is formed -[-CH2-NH-CO-O-organic-O-CO-NH-]n. If a polyol (more than two -OH groups, e.g. glycerol has three) then a polymer in three dimensions will be formed. So 'polyol" could be glycerol, but any organic with enough -OH groups could be used.
Add to or comment on this answer using the form below.
Note: All submissions are moderated prior to posting.
If you found this answer useful, please consider making a small donation to science.ca.