1585-90-6, In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 1585-90-6, name is 1-(2-Hydroxyethyl)-1H-pyrrole-2,5-dione, introducing its new discovery.
AQUEOUS FUNCTIONALIZED POLYURETHANE DISPERSIONS
The present invention relates to a process for manufacturing an aqueous polyurethane dispersion (PUD) comprising at least one diene-functionalized polyurethane and at least one dienophile-functionalized polyurethane, the process comprising (1)(a) providing a first NCO-functional polyurethane prepolymer and reacting said first NCO-functional polyurethane prepolymer with a compound comprising at least one NCO-reactive group and at least one diene group to obtain a diene-functionalized polyurethane; or (1)(b) reacting a first polyisocyanate with a compound comprising at least two NCO-reactive groups and at least one diene group to obtain a diene-functionalized polyurethane; (2) dispersing said diene-functionalized polyurethane into a continuous aqueous phase to form a diene-functionalized polyurethane dispersion; (3)(a) providing a second NCO-functional polyurethane prepolymer and reacting said second NCO-functional polyurethane prepolymer with a compound comprising at least one NCO-reactive group and at least one dienophile group to obtain a dienophile-functionalized polyurethane; or (3)(b) reacting a second polyisocyanate with a compound comprising at least two NCO-reactive groups and at least one dienophile group to obtain a dienophile-functionalized polyurethane; (4) dispersing said dienophile-functionalized polyurethane into a continuous aqueous phase to form a dienophile-functionalized polyurethane dispersion; and (5) combining the diene-functionalized polyurethane dispersion and the dienophile-functionalized polyurethane dispersion, thereby forming the aqueous polyurethane polymer dispersion. Also encompassed are the thus produced dispersions, compositions containing them and their use as coatings, adhesives, laundry detergents, textile treatment agents and cosmetics.
Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.1585-90-6, you can also check out more blogs about1585-90-6
Reference£º
Pyrroline – Wikipedia,
1-Pyrroline | C4H7N – PubChem