Process for the preparation of compounds containing s-triazine units and isocyanate groups or isocyanate-reactive groups and the production of polyurethanes containing these fillers
AssigneeBayer Aktiengesellschaft
InventorsGerhard Grogler, Werner Rasshofer, Richard Kopp
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Abstract
This invention relates to a process for the preparation of compounds which contain s-triazine units and isocyanate groups or isocyanate-reactive groups and which melt without decomposition, by the reaction of triisocyanates containing s-triazine units with compounds containing isocyanate-reactive groups, and the use of these products as fillers which can be chemically fixed in the production of polyurethanes by the isocyanate polyaddition process.
Claims5
A process for the preparation of compounds containing s-triazine units and isocyanate groups or isocyanate-reactive groups, which compounds are capable of melting without decomposition and are suitable for use as fillers which can be chemically fixed in polyurethanes, characterized in that triisocyanates corresponding to the formula ##STR2## wherein X denotes a group obtained by removal of the more highly reactive isocyanate group from an aromatic diisocyanate having isocyanate groups differing in their reactivity in the isocyanate addition reaction,
- are reacted with at least difunctional compounds containing isocyanate-reactive groups, using an equivalent ratio of isocyanate groups to isocyanate-reactive groups of at least 1.5:1 or an equivalent ratio of isocyanate-reactive groups to isocyanate groups of at least 1.5:1.
A process for the production of polyurethane comprising reacting an organic polyisocyanate with one or more active hydrogen-containing materials in the presence of filler materials, the improvement wherein said filler material comprise compounds containing s-triazine units and isocyanate groups or isocyanate-reactive groups which are capable of melting without decomposition and which can be chemically fixed in the polyurethane are obtained by reacting triisocyanates corresponding to the formula ##STR3## wherein X denotes a group obtained by removal of the more highly reactive isocyanate group from an aromatic diisocyanate having isocyanate groups differing in their reactivity in the isocyanate addition reaction
- with at least difunctional compounds containing isocyanate-reactive groups, using an equivalent ratio of isocyanate groups to isocyanate-reactive groups of at least 1.5:1 or an equivalent ratio of isocyanate-reactive groups to isocyanate groups of at least 1.5:1.
Dependencies are inferred from the claim text.