POLYISOCYANATE PREPARATIONS CONTAINING LATENT TIN CATALYSTS AND A PROCESS FOR THEIR PREPARATION

摘要

POLYISOCYANATE PREPARATIONS CONTAINING LATENT TIN CATALYSTS AND A PROCESS FOR THEIR PREPARATION 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 preparations are storage stable and may be used to produce adhesives, coatings and foams.