C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/79 (2006.01) C07D 229/00 (2006.01) C08G 18/78 (2006.01) C08G 18/80 (2006.01) C09D 175/04 (2006.01)
Patent
CA 2215132
Uretdione-functional polyisocyanates, a process for their preparation, and their use Disclosed is a urea- and uretdione-functional polyisocyanate having the formula: Image where Image R is Image n is 1 to 20; and R1 and R3 are each independently H, a linear or branched C1-C4 (cyclo)alkyl radical, R4O-OC-CH2-CH-CO-OR4 (IV) or R4O-OC-CH2-CH2- (V), with the proviso that at least one of R1 and R3 is a radical of the formula (IV) or (V), R2 is a divalent C2-C13 linear or branched saturated aliphatic or alicyclic hydrocarbon radical, R4 and R5 are a C1-C4 hydrocarbon radical, and R4' is a radical of a ketoxime. The urea- and uretdione-functional polyisocyanate is useful in a coating composition.
Polyisocyanates à fonction uretdione, procédé de préparation de ces derniers et utilisation. On dévoile un polyisocyanate à fonction urée et uretdione de formule : Image où Image R est Image n est 1 à 20; et R1 et R3 sont chacun indépendamment H, un radical (cyclo)alkyle en C1-C4 linéaire ou ramifié, R4O-OC-CH2-CH-CO-OR4 (IV) ou R4O-OC-CH2-CH2- (V), à la condition qu'au moins un radical parmi R1 et R3 soit un radical de formule (IV) ou (V), R2 est un radical hydrocarboné en C2-C13 saturé aliphatique ou alicyclique, linéaire ou ramifié, divalent, R4 et R5 sont un radical hydrocarboné en C1-C4 et R4' est un radical d'un cétoxime. Le polyisocyanate à fonction urée et uretdione est utile dans une composition de revêtement.
Degussa-Huls Aktiengesellschaft
Fetherstonhaugh & Co.
Huls Aktiengesellschaft
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