The impact of baking conditions on physico-chemical characteristics influencing topography and appearance aspects of polyurethane coatings

Microporous Polymer Networks Made by Cyclotrimerization of Commercial, Aromatic Diisocyanates

“…The cyclotrimerization of aromatic isocyanates under triarylisocyanurate formation have been extensively described by using several catalysts as metal salts of carboxylic acids, tertiary amines, , sodium para -toluenesulfinate ( p -TolSO 2 Na)/1,3-dimethyl-2-imidazoli-dinone, tetrabutylammonium fluoride (TBAF), tetrakis­(dimethylamino)­ethylene (TDAE), or N -heterocyclic carbenes . Cyclotrimerization of isocyanate groups is known to improve such properties of polyurethanes as thermal and chemical resistance, flame retardance, and film forming characteristics . Nonporous polymer networks with isocyanurate knots have been produced in the cyclotrimerization of commercial, araliphatic diisocyanates as methylenediphenyldi­isocyanat (MDI) and aliphatic diisocyanate as hexamethylene­diisocyanate (HMI) …”

“…29 Cyclotrimerization of isocyanate groups is known to improve such properties of polyurethanes as thermal and chemical resistance, 30 flame retardance, 31 and film forming characteristics. 32 Nonporous polymer networks with isocyanurate knots have been produced in the cyclotrimerization of commercial, araliphatic diisocyanates as methylenediphenyldiisocyanat (MDI) and aliphatic diisocyanate as hexamethylenediisocyanate (HMI). 33 Our novel synthetic procedure toward microporous, triarylisocyanurate-based polymer networks also allows for the generation of MPN monoliths by carefully adjusting the ratio between monomers and solvents.…”

Synthesis of 1,4‐Butanediol di(3‐Diethylamino‐2‐Hydroxylpropyl Alcohol) Ether and Cationic Waterborne Polyurethane with High Solids Content

“…High solids content is often expected, because the higher the solids content is, the faster the drying rate and the less the energy consumption. Small particle size will be beneficial in storage stability and penetration or leveling on a substrate in applications 31,32 but generally leads to high viscosity, which is disadvantageous to disperse the prepolymer in a small volume of water. Ideal latex should have high solids content, low viscosity, small particle size, and long storage life.…”