Moisture-curing polyurethane composition containing oxazolidine
AssigneeSika Technology AG
InventorsAndreas Kramer, Urs Burckhardt
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Abstract
A polyurethane composition, which contains at least one isocyanate-group-containing polymer, obtained from the reaction of at least one polyol with at least one diisocyanate, and at least one oxazolidine of the formula (I). The polyurethane composition allows one-component moisture-curing adhesives, sealants or coatings that have good storage stability, long open times and cure quickly to give a surprisingly non-tacky material having pronounced high-resilient properties.
Claims15
A polyurethane composition comprising at least one polymer containing isocyanate groups, obtained from the reaction of at least one polyol and at least one diisocyanate, and at least one oxazolidine of the formula (I)
- where
- R1 is an alkyl or cycloalkyl or arylalkyl radical having 1 to 8 carbon atoms,
- R2 is H or methyl, and
- G is an aromatic radical selected from the group consisting of furanyl, thiophenyl, pyridinyl, indenyl, indanyl, benzodioxolyl, benzodioxanyl, naphthyl, tetrahydronaphthyl, anthracenyl and a radical of the formula
- where
- R3 is fluoro, chloro, bromo, nitro, cyano, phenyl, phenoxy, (C1 to C5)-alkyl or (C1 to C5)-alkoxy, and
- n is 0, 1, 2 or 3.
Dependencies are inferred from the claim text.