Polyurethane dispersions having improved shear stability

Details Polyurethane dispersions having improved shear stability Polyurethane dispersions having improved shear stability

C - Chemistry, Metallurgy

08

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C08G 18/10 (2006.01) C08G 18/40 (2006.01) C08G 18/65 (2006.01) C08G 18/76 (2006.01) C08J 5/02 (2006.01) C08J 5/18 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2397268

A polyurethane dispersion prepared using a two step addition of different surfactants has greater shear stability than a similar dispersion prepared using only a single surfactant or a single step addition of surfactants.

L'invention concerne une dispersion de polyuréthanne préparée par une addition en deux étapes d'agents tensioactifs différents. Cette dispersion possède une plus grande stabilité au cisaillement qu'une dispersion similaire préparée avec un seul agent tensioactif ou avec plusieurs agents tensioactifs ajoutés en une seule étape.

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