Process for producing aggregated latex particle

Details Process for producing aggregated latex particle Process for producing aggregated latex particle

C - Chemistry, Metallurgy

08

J

C08J 3/12 (2006.01)

Patent

CA 2599318

A novel method of particle formation by which the target aggregated latex particles can be efficiently recovered from a polymer latex under temperature conditions which are as wide as possible without deteriorating the original quality possessed by the polymer itself, while inhibiting secondary aggregation and fine-particle generation. The process for producing aggregated latex particles is characterized by atomizing or dropping a polymer latex in a gas phase containing an inorganic salt and/or acid in an aerosol state and causing the droplets of the polymer latex to fall or come into an aqueous phase containing a dispersant. Preferably, the process is further characterized in that the polymer latex contains a water-soluble polymer having the property of forming a physical gel.

L~invention concerne un procédé novateur de formation de particules permettant de récupérer de manière efficace les particules de latex agrégées cibles à partir d~un latex polymère dans des conditions de température aussi étendues que possible sans détériorer la qualité d~origine du polymère proprement dit, tout en inhibant une agrégation secondaire et la génération de fines particules. Le procédé de fabrication de particules de latex agrégées est caractérisé par une étape d~atomisation ou d~égouttage d~un latex polymère dans une phase gazeuse contenant un sel inorganique et/ou un acide à l~état aérosol et une étape consistant à conduire les gouttelettes du latex polymère à tomber ou à pénétrer dans une phase aqueuse contenant un dispersant. De préférence le procédé est également caractérisé en ce que le latex polymère contient un polymère soluble dans l~eau ayant la propriété de formation d~un gel physique.

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