Preparation of aqueous emulsions

Details Preparation of aqueous emulsions Preparation of aqueous emulsions

A - Human Necessities

01

N

A01N 25/04 (2006.01) A01N 25/28 (2006.01) B01F 3/08 (2006.01) B01J 13/02 (2006.01) B01J 13/14 (2006.01) B01J 13/16 (2006.01)

Patent

CA 2171726

A method of controlling the particle size and particle size distribution of an aqueous emulsion having a non-aqueous disperse phase during the production thereof, in which the production of the emulsion is carried out in the presence of a dispersion of a templating agent, such as a polymer latex, and surfactant. Particle size and particle size distribution of the dispersion is controlled by selecting the templating agent and surfactant such as to cause deposition of the disperse phase on particles of the dispersed templating agent, such that the particle size distribution of the templating agent provides a template for the particle size distribution of the final emulsion.

L'invention concerne un procédé pour réguler la grosseur particulaire et la granulométrie d'une émulsion aqueuse ayant une phase dispersée non aqueuse pendant sa production, dans lequel la production de l'émulsion a lieu en présence d'une dispersion d'un agent de matrice, tel qu'un latex de polymère et d'un agent tensioactif. La grosseur particulaire et la granulométrie de la dispersion sont régulées par la sélection de l'agent de matrice et l'agent tensioactif de manière à provoquer le dépôt de la phase dispersée sur les particules de l'agent de matrice dispersé. Ainsi, la granulométrie de l'agent de matrice constitue une matrice pour la granulométrie de l'émulsion finale.

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