Dispersions having improved stability

Details Dispersions having improved stability Dispersions having improved stability

C - Chemistry, Metallurgy

09

D

C09D 11/00 (2006.01) B01F 17/00 (2006.01) B01F 17/54 (2006.01) B01J 13/00 (2006.01) B01J 13/16 (2006.01) C08G 18/62 (2006.01) C09B 67/46 (2006.01) C09D 5/02 (2006.01) C09D 17/00 (2006.01)

Patent

CA 2341977

Dispersion containing a liquid vehicle (which can be aqueous, semi-aqueous or non-aqueous), organic or inorganic particles (or mixtures) that are insoluble in the liquid vehicle and a polymeric dispersant, preferably a structured polymeric dispersant, having one or more segments soluble in the liquid vehicle and one or more segments insoluble in the liquid vehicle have improved stability when the insoluble segment(s) contains cross-linking groups which are cross-linked to a cross-linking compound such as itself or a polyfunctional monomer, oligomer or polymer to form an encapsulation network that entraps the particles and are particularly useful for paints or inks in coating and printing applications.

L'invention concerne une dispersion contenant un véhicule liquide (pouvant être aqueux, semi-aqueux ou non aqueux), des particules organiques ou inorganiques (ou leurs mélanges) insolubles dans le véhicule liquide, ainsi qu'un agent dispersant polymère, de préférence un agent dispersant polymère structuré comportant un ou plusieurs segments solubles dans le véhicule liquide et un ou plusieurs segments insolubles dans le véhicule liquide ; la dispersion présente une stabilité améliorée lorsque les segments insolubles contiennent des groupes de réticulation qui sont réticulés avec un composé de réticulation tel que l'agent dispersant lui-même ou un monomère, un oligomère ou un polymère polyfonctionnel afin de former un réseau d'enrobage qui piège les particules. Cette dispersion s'utilise notamment dans des peintures et des encres pour des applications de revêtement et d'impression.

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