Polyurethanes made using zinc catalysts
AssigneeDow Global Technologies LLC
InventorsRichard Keaton, Peter Margl, Duane Romer, Nathan Wilmot, Rajat Duggal, Rashmi Chamsarkar
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Abstract
Polyisocyanate-based polymers are formed by curing a reaction mixture containing at least one polyisocyanate and at least one isocyanate-reactive compound having at least two isocyanate-reactive groups in the presence of a zinc catalyst that contains at least one zinc atom associated with a polydentate ligand that contains at least one nitrogen-containing complexing site.
Claims8
A process for preparing a polyisocyanate-based polymer, comprising forming a reaction mixture containing at least one polyisocyanate, at least one isocyanate-reactive compound having at least two isocyanate-reactive groups and at least one zinc catalyst, and then curing the reaction mixture to form a polymer, wherein the zinc catalyst contains at least one zinc atom associated with a polydentate organic ligand that contains at least two complexing sites, of which at least one is nitrogen-containing, wherein the ligand compound is
- a β-imino alcohol or enol.
Dependencies are inferred from the claim text.