Solid polyurethane hardeners having triazine groups,...

Details Solid polyurethane hardeners having triazine groups,... Solid polyurethane hardeners having triazine groups,...

C - Chemistry, Metallurgy

08

G

C08G 18/80 (2006.01) C07D 403/00 (2006.01) C08G 18/79 (2006.01) C09D 5/44 (2006.01) C09D 5/46 (2006.01)

Patent

CA 2288446

Disclosed is a solid compound useful as a polyurethane hardener (curing agent) having a triazine group, a melting point of from 40 to 130°C and a free NCO content of less than 2% by weight, and is a reaction product of: (A) a polyaddition compound having at least one uretdione group and prepared by a reaction of: (1) a uretdione-functional polyisocyanate, and (2) a hydroxyl-functional chain extender, and (B) a compound having at least one C=N bond, at an equivalent ratio of the uretdione group to the C=N bond between 1.0:0.05 and 1.0:1.0, to a process for preparing such compound and to its use for preparing plastics, especially a powder coating material which crosslinks to give a high-gloss or matt, light- and weather-stable coating film.

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