Coatings from polyisocyanurate coatings (rim) and their use in injection molding processes
AssigneeCovestro Deutschland AG
InventorsJan Weikard, Yvonne Reimann, Florian Golling, Frank Richter, Michael Glawe, Richard Meisenheimer, Holger Mundstock, Dirk Achten
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Abstract
The present invention relates to the use of polyisocyanate compositions and trimerization catalysts for production of coatings by reaction injection molding. The present disclosure also describes the coatings obtained by the use. The correspondingly coated workpieces are also described in this disclosure. A method for coating workpieces by reaction injection molding is also described herein.
Claims16
Method for coating workpieces by reaction injection molding by providing a reaction mixture having a molar ratio of isocyanate groups to isocyanate-reactive groups of at least 3:1, wherein the reaction mixture contains
- a) at least one polyisocyanate composition A and
- b) at least one trimerization catalyst B
- wherein at least 30 mol % of free isocyanate groups present in the reaction mixture are converted into isocyanurate groups during the reaction injection molding process.
Dependencies are inferred from the claim text.