摘要:
A polyisocyanate composition includes at least a pentamethylenediisocyanate derivative. The polyisocyanate composition contains 5 mass% or more and 95 mass% or less of a uretdione derivative composed of an isocyanate bimolecular-product of pentamethylenediisocyanate.
摘要:
The present invention is related to a polyurethane dispersant and a preparation method thereof. The polyurethane dispersant is terminated by a nitrogen-containing heterocyclic compound during synthesis. The nitrogen-containing heterocyclic compound is prepared by subjecting anhydride and a compound containing a primary amine and a secondary amine or a hydroxyl or mercapto group to dehydration condensation. The condensed product is the nitrogen-containing heterocyclic compound, containing a reactive hydrogen. The structural formula of the compound containing the primary amine and the secondary amine or hydroxyl or mercapto group is shown as follows:
wherein n=1 to 5, and preferably 2 to 4, R 1 and R 2 are respectively alkyls containing 1 to 8 carbons, R 1 and R 2 are independent of each other or connected by a chemical bond to form one or more saturated or unsaturated 4-member to 8-member rings, and X represents N, O, or S.
摘要:
Die vorliegende Erfindung betrifft ein neuartiges holographisches Photopolymer basierend auf prepolymerbasierten Polyurethanzusammensetzungen, dessen Herstellung und seine Anwendung für optische Anwendungen verschiedenster Art.
摘要:
Pigment dispersants prepared by reacting an isocyanate oligomer having an average functionality of at least three with a polyester or polyacrylate, a poly(ethylene glycol)alkyl ether, and a diamine having a primary amine and a tertiary amine have excellent stabilizing properties and offer a wide formulation latitude with a variety of solvent systems, including polar solvents and water, and are particularly useful as pigment dispersants for paints and coating applications.
摘要:
This invention is directed to compounds that can be used as antioxidants for exposed metal surfaces, and also as adhesion promoters for adhesive, coating or encapsulant resins that are applied to the metal substrates. These compounds include triazine or isocyanurate compounds bearing reactive or polymerizable functional groups, polyfunctional cyanate esters, and polyfunctional blocked-isocyanates.