Mixed masked (poly)isocyanates

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/80 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2338161

The invention concerns a composition of at least partially masked isocyanates, characterised in that it is masked by at least two different masking agents, selected such that in the octanol test at 110 ·C, the ratio: D = percentage in equivalents of masking agents unblocking first at 110 ·C / percentage in equivalents of masking agents unblocking first at 110 ·C, is greater than 4/3, advantageously greater then 1.5, preferably greater than 2, provided that when a masking agent comprises phenol function as masking function, it does not comprise a COOH function.

Cette invention a pour objet une composition d'isocyanates au moins partiellement masqués, caractérisée par le fait qu'elle est masquée par au moins deux agents de masquage différents, choisis de manière que dans le test à l'octanol à 110 ~C, le rapport: D = pourcentage en équivalents d'agent masquant se débloquant en premier à 110 ~C / pourcentage en équivalents d'agent masquant se débloquant en dernier à 110 ~C, soit supérieur à 4/3, avantageusement supérieur à 1,5, de préférence supérieur à 2, sous réserve que lorsqu'un agent de masquage comporte une fonction phénol comme fonction masquante, il ne comporte pas de fonction COOH.

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