Polymeric compositions

Details Polymeric compositions Polymeric compositions

C - Chemistry, Metallurgy

02

F

134/39, 31/80.1

C02F 1/56 (2006.01) B01J 20/22 (2006.01) B01J 20/26 (2006.01) C02F 1/52 (2006.01) C02F 1/54 (2006.01) C08J 3/12 (2006.01) C10L 5/14 (2006.01) C22B 1/244 (2006.01)

Patent

CA 1339850

Water absorbent particulate polymers and their uses are described. Friable aggregates may be made by bonding substantially dry polymer particles with an aqueous liquid and drying the aggregates. These aggregates can be broken down to the individual polymer particles upon mixing with an aqueous medium and thus can have the flow properties of relatively coarse particles and the performance properties of relatively fine particles. They may be soluble and used as flocculants or viscosifiers or binders for, for instance, iron ore pelletisation. Alternatively they may be swellable and insoluble, for instance for converting a sticky particulate mass (such as coal fines filter cake) to a crumbly solid. When pellets are formed by compression moulding from a crumbly solid made by mixing water absorbent polymer particles with a sticky mass of inorganic particles (such as a coal fines filter cake) improved properties are obtained when the absorbent polymer particles are introduced in the form of a dispersion in water-immiscible liquid.

589582

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