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US 2013/0095331 A1Published application
Process for the preparation of low-viscosity, water-dilutable urethane (meth)acrylates
AssigneeBayer Intellectual Property GmbH
InventorsMichael Ludewig, Stefan Sommer, Wolfgang Fischer, Nusret Yuva
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Abstract
The present invention relates to a process for the preparation of highly reactive, low-viscosity and water-dilutable polyisocyanate reaction products which contain activated groups which react, by polymerization, with ethylenically unsaturated compounds under the action of actinic radiation. The present invention furthermore relates to a process for the preparation of such products and their use.
Claims16
A process for preparing a low-viscosity, water-dilutable polyurethane (meth)acrylate comprising reacting components (a), (c), (d), and (e)
- (a) at least one oligomeric polyisocyanate having an average of at least three isocyanate groups;
- (c) at least one polyoxyalkylene mono-ol;
- (d) at least one hydroxyalkyl (meth)acrylate;
- (e) at least one polyoxyalkylene polyol based on a starter molecule which has at least three hydroxy functions and is partially reacted by esterification with (meth)acrylic acid such that on average 0.2 to 1.5 hydroxy functions still remain;
- to form said low-viscosity, water-dilutable polyurethane (meth)acrylate;
- wherein said low-viscosity, water-dilutable polyurethane (meth)acrylate has an NCO content of less than 0.5 weight %.
3 more elements
Dependencies are inferred from the claim text.