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AssigneeDegussa AG
InventorsStephan Kohlstruk, Lothar Hayen, Emmanouil Spyrou
Estimating the term…
A low monomer 1:1-monoadduct from a diisocyanate and a hydroxy(meth)acrylate with a free diisocyanate content of less than 0.7% by weight and a free NCO content of 10.4-16.4% by weight can be used as a starting material for an acrylic or NCO functionalized crosslinker; a bonding agent for coatings and adhesives; and a linker for solid-phase synthesis of oligo-nucleotides, polynucleotides or peptides. The monoadduct is obtained by converting 5-20 mol diisocyanate with 1 mol hydroxy(meth)acrylate at a temperature of 40-120° C. in the presence of at least one inhibitor; subsequently separating a non-converted diisocyanate from a reaction product by short-path distillation at 80-220° C./0.1-10 mbar; feeding air, nitrogen monoxide or oxygen or a mixture containing (a) air, oxygen or nitrogen monoxide and (b) a proportion of 1-90% by volume of carbon dioxide, nitrogen, an inert gas or a mixture thereof through a reaction apparatus.
A 1:1-monoadduct of a diisocyanate and a hydroxy(meth)acrylate, prepared by reacting a diisocyanate with a hydroxy(meth)acrylate at a molar ratio of 5-20 moles of the diisocyanate to 1 mole of the hydroxyl(meth)acrylate, and at a temperature of 40-120° C. in the presence of at least one inhibitor, until the hydroxyl groups of the hydroxy(meth)acrylate are fully reacted with the diisocyanate, thereby providing a reaction product comprising the 1:1-monoadduct and unreacted diisocyanate;
A process for preparing a 1:1-monoadduct of a diisocyanate and a hydroxy(meth)acrylate having a free diisocyanate content of less than 0.7% by weight and a free NCO content of 10.4-16.4% by weight, comprising:
Dependencies are inferred from the claim text.