Polyurethane latexes, processes for preparing them and...

Details Polyurethane latexes, processes for preparing them and... Polyurethane latexes, processes for preparing them and...

C - Chemistry, Metallurgy

08

G

C08G 18/10 (2006.01) C08G 18/08 (2006.01) C08G 18/48 (2006.01) C08J 3/03 (2006.01)

Patent

CA 2281584

Disclosed are stable aqueous polyurethane latexes prepared from prepolymer formulations including a polyisocyanate component and polyol component, wherein from 5 to 40 percent of the weight of the polyol component is ethylene oxide in the form of ethylene oxide applied as an end cap onto a propylene oxide or higher oxyalkylene polyoxyalkylene polyol, and no more than 45 percent of the weight of polyol component is ethylene oxide. These latexes are prepared without the use of organic solvents.

On décrit des latex de polyuréthane aqueux, stables, obtenus à partir de formulations de prépolymère comprenant un composant polyisocyanate et un composant polyol, dans lesquels 5 à 40 % du poids du composant polyol est un oxyde d'éthylène se présentant sous la forme d'un oxyde d'éthylène appliqué comme coiffage terminal sur un oxyde de propylène ou un polyol supérieur d'oxyalkylène polyoxyalkylène, et 45 % au plus du poids de composant polyol est un oxyde d'éthylène. Ces latex sont préparés sans recours à des solvants organiques.

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