Zirconium urethane catalysts
AssigneeKing Industries, Inc.
InventorsWerner Blank, Zhiqiang Alex He, Marie Emmanuelle Picci, John James Florio
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Abstract
The present invention is directed to novel metal organocomplexes as catalysts for the reaction of compounds with isocyanate and hydroxy functional groups to form urethane and/or polyurethane and the process employing such catalysts. More particularly, the present invention is directed to novel complexes of zirconium or hafnium with diketones or alkylacetoacetoates. These novel catalysts are useful for the production of urethanes and polyurethanes which are important in many industrial applications, such as: coatings, foams, adhesives, sealants, and reaction injection molding (RIM) plastics.
Claims15
A process of preparing a polyurethane coating or an adhesive coating by using a composition comprising an isocyanate-hydroxy reaction catalyst having the chemical structure:
- Me(X.sub.1,X.sub.2,X.sub.3,X.sub.4) (I)
- wherein Me is zirconium (Zr) or hafnium (Hf) and X.sub.1, X.sub.2, X.sub.3, and X.sub.4, are the same or different and selected from the group consisting of a diketone having the structure
- R.sub.1 COCH.sub.2 COR.sub.2 (I)
- and
- an alkylacetoacetate having the structure:
- R.sub.1 OCOCH.sub.2 COR.sub.2 (III)
- wherein each of R.sub.1 and R.sub.2 is a branched or linear C.sub.1 -C.sub.20 hydrocarbon and at least one of X.sub.1, X.sub.2, X.sub.3, and X.sub.4 is a diketone with structure (II) and wherein the total number of carbons in R.sub.1 +R.sub.2 in (II) and (III) is 4-21.
A process of preparing a polyurethane coating or an adhesive coating using an isocyanate-hydroxy reaction catalyst composition comprising a mixture of tetrakis-(2,4-pentanedionato) zirconium and a compound selected from the group consisting of a diketone having the structure:
- R.sub.1 COCH.sub.2 COR.sub.2 (II)
- and an alkylacetoacetate having the structure:
- R.sub.1 OCOCH.sub.2 COR.sub.2 (III)
- wherein each of R.sub.1 and R.sub.2 is a branched or linear C.sub.1 -C.sub.20 hydrocarbon and the total number of carbons in R.sub.1 +R.sub.2 is at least 4.
Dependencies are inferred from the claim text.