Polyisocyanate preparations containing latent tin catalysts and

Compositions – Compositions containing a single chemical reactant or plural... – Organic reactant

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25218221, 502167, 502158, 528 52, 528 58, B01J 3100, C09K 300, C08G 1808

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active

050452266

ABSTRACT:
Polyisocyanate preparations containing latent tin catalysts are made from an organic polyisocyanate and a reaction product of a sulfonyl isocyanate and an organic tin catalyst in which at least one tin-oxygen bond is present. The organic tin catalyst preferably contains a tin-alkoxy, tin-siloxy, distannoxane and/or tin-carboxylate group. The reaction product of a sulfonyl isocyanate with a tin-carboxylate must generate carbon dioxide during its formation. The sulfonyl isocyanate and organic tin compound are used in quantities such that at least one isocyanato-sulfonyl group is present for each tin-oxygen bond. These polyisocyanate preparation are storage stable and may be used to produce adhesives, coatings and foams.

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K. C. Frisch and L. P. Rumao, J. Macromol, Sci-Revs, Macromol Chem., C5, pp. 103-150 (1970).

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