Bayer Aktiengesellschaft

Hans-Gerd Metzinger

Hans Sattlegger

Wilhelm Weber

Hanns P Muller

Karl-Heinz Sockel

Rudolf Hombach

Roland Richter

Bernd Riberi

Karl Schnurrbusch

Ralf Busch

Theo Achtenberg

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.

Polyisocyanate preparations containing latent tin catalysts and a

Polysiloxane compositions which harden in the presence of moisture by elimination of alcohols, which have high stability in storage while unvulcanized in the absence of moisture, which exhibit good adhesion to substrates, and which are improved by the presence of stabilizing silyl derivations of N-methyl benzamide contain:

Moisture-hardening one-component polysiloxane compositions

A process for the preparation of a plastic organopolysiloxane composition which can be stored in the absence of water and which is convertable even at room temperature into rubber-elastic compositions by the action of water or atmospheric moisture, comprising mixing a hydroxyl-terminated poly-diorganopolysiloxane with about 0.1-15% by weight of the total mixture of a substance of the formula

Storable plastic organopolysiloxane molding compositions

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Leverkusen, Germany

Hans-Gerd Metzinger