Polyisocyanate preparations containing latent tin catalysts and a process for their preparation

US5045226A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Roland Richter · Cologne, DE
• Hanns P. Muller · Leverkusen, DE
• Wilhelm Weber · Neustadt, DE
• Rudolf Hombach · Leverkusen, DE
• Bernd Riberi · Odenthal, DE
• Ralf Busch · Riegelsberg, DE
• Hans-Gerd Metzinger · Leverkusen, DE

Key dates

• Filing date: Jul 24, 1990
• Grant date: Sep 3, 1991
• Expiry date: Jul 24, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/72
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

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.