Polymeric compositions and methods of making and using them

Details Polymeric compositions and methods of making and using them Polymeric compositions and methods of making and using them

C - Chemistry, Metallurgy

08

J

C08J 3/12 (2006.01) C02F 1/56 (2006.01) C08J 3/05 (2006.01) C09K 3/00 (2006.01)

Patent

CA 2087445

Particulate water-soluble or water-swellable polymeric material is provided with a substantially uninterrupted continuous coating of crystalline material. Single particles or aggregates having a size below 1 mm in size can be made by mixing the polymeric particles with a substantially saturated or supersaturated aqueous solution of crystallisable material (optionally a melt of hydrate crystallisable material) and thereby depositing it as a continuous crystalline coating on the particles.

Un revêtement continu pratiquement ininterrompu d'une matière cristalline est déposé sur une matière polymérique particulaire hydrosoluble ou hydrogonfable. On peut obtenir des particules individuelles ou des agrégats de taille inférieure à 1 mm en mélangeant les particules polymériques avec une solution aqueuse, fortement saturée ou sursaturée, d'une substance cristallisable (facultativement une matière cristallisable hydratée fondue), puis en déposant sur les particules le mélange obtenu de façon à obtenir un revêtement cristallin continu.

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