Selectivity of isophorone diisocyanate in the urethane reaction influence of temperature, catalysis, and reaction partners

Preparation of Isophorone Diisocyanate Terminated Star Polyethers

“…[19] Relative reactivities of the primary and secondary isocyanate groups in urethane formation depend on the catalyst, the reaction temperature and the reactivity of the alcohol. [20] Without added catalyst, IPDI reacts mainly with the cycloaliphatic isocyanate group yielding 81-84% secondary urethane (sMU) units. [10] At higher temperatures, the difference in reactivity between cycloaliphatic and primary isocyanate group is reduced.…”

Amine-Manganese Complex as an Efficient Catalyst for Polyurethane Syntheses

“…However, the reaction rate of aliphatic isocyanates on preparations of polyurethane is very slow compared with aromatic isocyanates. Therefore, tertiary amines [1][2][3][4][5] and tin compounds, [6][7][8][9][10] having excellent catalytic activity, are used mainly as catalysts for polyurethane formation. In particular, dibutyltin dilaurate (DBTDL) has been used.…”

Kinetic and Thermodynamic Studies of the Urethane Reaction Based on 1,3-diazetidine-2,4-dione and 4-(Tetrahydro-Pyran-2-yloxy)-butan-1-ol

“…As a result of various assumptions, stoichiometry, reaction partners, experimental methods, and interpretations, the reactivity difference between the isocyanate (NCO) groups have been studied widely. [19] It's worth noting that this reactivity difference has been the subject of investigation in the past. [20][21][22][23] However, much less attention has been focused on the urethane reaction of uretdione with alcohol or phenol.…”