Electrically neutral dispersions and method of preparing same

Details Electrically neutral dispersions and method of preparing same Electrically neutral dispersions and method of preparing same

C - Chemistry, Metallurgy

08

F

C08F 2/22 (2006.01) C08F 2/30 (2006.01) C08F 257/02 (2006.01)

Patent

CA 2648709

The invention is a method of producing an essentially electrically neutral polymer dispersion, comprising a polymerizing one or more monomers in the presence of a nonionic surfactant, wherein the polymerization preferably occurs in the absence of ionic surfactants. The invention also includes methods of producing positively or negatively charged polymer dispersions comprising producing the essentially nonionic polymer dispersion and further adding a cationically-charged or anionically-charged surfactant or electrolyte. The invention further includes dispersions produced by the methods of the invention and polymer films and powders produced from these dispersions.

La présente invention concerne un procédé permettant de produire une dispersion polymère sensiblement neutre d'un point de vue électrique, consistant à polymériser un ou plusieurs monomères en présence d'un agent tensioactif non ionique, la polymérisation s'effectuant de préférence en l'absence d'agents tensioactifs ioniques. Cette invention concerne également des procédés permettant de produire des dispersions polymères à charge positive ou négative, consistant à produire une dispersion polymère sensiblement non ionique et à ajouter ensuite un agent tensioactif ou un électrolyte à charge cationique ou anionique. Cette invention concerne enfin des dispersions obtenues par les procédés décrits ainsi que des films et poudres polymères produits à partir de ces dispersions.

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