Fluorinated polyisocyanates

Details Fluorinated polyisocyanates Fluorinated polyisocyanates

C - Chemistry, Metallurgy

08

G

C08G 18/38 (2006.01) C09D 175/04 (2006.01) C09J 175/04 (2006.01)

Patent

CA 2234371

A fluorinated polyisocyanate which comprises an organic polyisocyanate reacted with a fluorinated monofunctional alcohol represented by formula (I), where R f is a fluoroalkyl containing group having at least 4 carbon atoms, X is a divalent radical, R3 is H or an alkyl group having 1-4 carbon atoms, n is 0-1 and m is 0-30, provided that when n is 0 then m must be equal to or greater than 1 and when m is 0, n is 1, wherein about 0.1-33 mole percent of active isocyanate groups are reacted with the fluorinated monofunctional alcohol; the fluorinated polyisocyanate can be used with acrylic polymers, polyesters, alkyl resins, polyols and the like to form coating compositions, sealants, adhesives and the like.

L'invention porte sur un polyisocyanate fluoré constitué d'un polyisocyanate ayant réagi avec un alcool monofonctionnel de formule (I) où Rf est un groupe contenant du fluoroalkyle, à 4 atomes de carbone, X est un radical divalent, R<3> est H ou un groupe alkyle à 1-4 atomes de carbone, n est 0 ou 1, m est 0 - 30 sous réserve que lorsque n = 0, m soit égal ou supérieur à 1, et que lorsque m = 0, n soit égal à 1, et dans lequel environ 0,1 - 33 % en moles de groupes isocyanate actifs réagissent avec l'alcool monofonctionnel fluoré. Le polyisocyanate fluoré peut être associé à des polymères acryliques, à des polyesters, à des résines alkydes, à des polyols et autres pour former des compositions pour revêtements, des produits d'étanchéité, des adhésifs et autres.

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