C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 3/12 (2006.01) C08F 6/22 (2006.01)
Patent
CA 2593037
A novel method of particle formation by which aggregated latex particles extremely reduced in the content of fine particles and coarse particles and satisfactory in powder properties including blocking resistance and powder flowability can be recovered from a polymer latex without deteriorating the original quality possessed by the polymer itself. The process for producing aggregated latex particles is characterized in that a polymer latex containing a water-soluble polymer having the property of forming a physical gel is atomized or dropped in a gas phase containing an inorganic salt and/or an acid in an aerosol state and the droplets of the polymer latex are caused to fall or come into an aqueous phase.
L~invention décrit un nouveau procédé de formation de particules, selon lequel des particules de latex agglomérées ayant une teneur extrêmement réduite en particules fines et en particules grossières et dotées de propriétés de poudre satisfaisantes (notamment résistance au blocage et fluidité de la poudre) peuvent être obtenues à partir d~un latex polymère sans altérer la qualité initiale dudit polymère. Ledit procédé est caractérisé en ce qu~un latex polymère, contenant un polymère hydrosoluble ayant la propriété de former un gel physique, est atomisé ou versé goutte à goutte dans une phase gazeuse contenant un sel inorganique et/ou un acide sous forme d~aérosol, les gouttelettes de latex polymère étant amenées à tomber dans, ou venir au contact d'une phase aqueuse.
Borden Ladner Gervais Llp
Kaneka Corporation
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