Process for the production of polymers and aqueous solutions thereof
AssigneeAllied Colloids Limited
InventorsPeter Flesher, David Farrar, Alan C. Benson
Life of this patent
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Abstract
A stable, water dispersable, substantially anhydrous disperson of water soluble or water swellable polymer particles in water immiscible liquid is made by reverse phase suspension polymerization and dehydration of the dispersion and is rendered dispersable in water by the addition of an oil soluble surfactant having HLB above 7.
Claims10
A process in which a stable, water dispersable, substantially anhydrous dispersion of water soluble or water swellable polymer particles in water-immiscible liquid is made by polymerising aqueous polymerisable monomer dispersed in water-immiscible liquid by reverse phase suspension polymerisation to form a dispersion of aqueous polymer dispersed in water-immiscible liquid, dehydrating this dispersion and, before or after the dehydration, adding an oil soluble surfactant that has a solubility at 20 degrees C. in the water-immiscible liquid of at least 1 part per 9 parts by weight of the liquid, that has a solubility at 20 degrees C in water of less than 1 part per 100 parts by weight water, that has HLB at least 7 and that will promote distribution of the dehydrated dispersion into water.
Dependencies are inferred from the claim text.