Process for the production of blocked polyisocyanates...

Details Process for the production of blocked polyisocyanates... Process for the production of blocked polyisocyanates...

C - Chemistry, Metallurgy

08

G

402/182, 117/195

C08G 18/79 (2006.01) C03C 25/32 (2006.01) C08G 18/80 (2006.01) H01B 3/30 (2006.01)

Patent

CA 1268891

A PROCESS FOR THE PRODUCTION OF BLOCKED POLYISOCYANATES CONTAINING CARBODIIMIDE GROUPS, THE POLY- ISOCYANATES OBTAINABLE BY THIS PROCESS AND THEIR USE FOR THE PRODUCTION OF PLASTICS ABSTRACT OF THE DISCLOSURE The present invention relates to a process for the production of organic compounds containing (i) carbodiimide and/or uretone imine groups and (ii) blocked isocyanate groups, wherein about 10 to 90% of the isocyanate groups of an organic polyisocyanate are blocked by reaction with a monofunctional blocking agent for isocyanate groups, and subsequently about 65 to 100% of the free isocyanate groups still remaining are converted into carbodiimide groups with elimination of the carbodiimide. The present invention also relates to the organic compounds obtainable by this process and to their use for the production of plastics by reaction with compounds containing isocyanate reactive groups by the isocyanate polyaddition process.

526458

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