Preparation of polyisocyanates containing uretdione groups

Details Preparation of polyisocyanates containing uretdione groups Preparation of polyisocyanates containing uretdione groups

C - Chemistry, Metallurgy

08

G

C08G 18/72 (2006.01) C07C 263/00 (2006.01) C07D 229/00 (2006.01) C08G 18/02 (2006.01) C08G 18/16 (2006.01) C08K 5/50 (2006.01)

Patent

CA 2488071

A method of dimerizing isocyanates including reacting the isocyanates in the presence of phosphines containing at least one directly phosphorus-attached bicyclic, cycloaliphatic radical. The polyisocyanate compositions obtained as described above can be used in mouldings, coating materials, adhesives, sealants or adjuvants that further include the polyisocyanate compositions and one or more materials selected from antioxidants, light stabilizers, pigments, fillers, additives, levelling assistance, defoamers and matting agents. The coating materials, adhesives or sealants can be used to coat substrates.

Méthode permettant la dimérisation d'isocyanates, cela en faisant réagir les isocyanates de préférence en présence de phosphines comportant au moins un radical cycloaliphatique bicyclique directement lié à un phosphore. Les formulations de polyisocyanate décrites ci-dessus peuvent être employées dans des moulages, des matériaux de revêtement, des adhésifs, des produits d'étanchéité ou des adjuvants renfermant, outre ces formulations, un ou plusieurs des constituants suivants : antioxydant, photostabilisant, pigment, agent de remplissage, additif, agent égalisant, agent antimousse ou agent de matité. Les matériaux de revêtement, les adhésifs ou des produits d'étanchéité peuvent être appliqués sur des substrats.

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