PROCESS FOR PRODUCTION OF WATER-ABSORBABLE RESIN
The present invention provides a method for producing a water-absorbent resin and a water-absorbent resin obtained by the method, more specifically, to provide a method for producing a water-absorbent resin by a reversed-phase suspension polymerization method, wherein an odor originating from a raw...
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Main Authors | , , , |
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Format | Patent |
Language | English Korean |
Published |
24.04.2013
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Subjects | |
Online Access | Get full text |
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Summary: | The present invention provides a method for producing a water-absorbent resin and a water-absorbent resin obtained by the method, more specifically, to provide a method for producing a water-absorbent resin by a reversed-phase suspension polymerization method, wherein an odor originating from a raw material component, in particular, a petroleum hydrocarbon dispersion medium, is further reduced as compared with a water-absorbent resin obtained by a conventional method, and to a water-absorbent resin obtained by the method. More specifically, the present invention provides A method for producing a water-absorbent resin by performing a reversed-phase suspension polymerization of a water-soluble ethylenically unsaturated monomer in a petroleum hydrocarbon dispersion medium, comprising the following steps of: (A) performing a primary dispersion in the absence of surfactants by adding an aqueous solution of a water-soluble ethylenically unsaturated monomer containing a hydrophilic polymeric dispersion agent to a petroleum hydrocarbon dispersion medium in which a hydrophobic polymeric dispersion agent was heat-dispersed or heat-dissolved, under stirring; (B) further performing a secondary dispersion by adding a surfactant to a dispersion liquid obtained after the primary dispersion; and (C) performing the reversed-phase suspension polymerization by using a radical polymerization initiator; and the water-absorbent resin obtained by the method. |
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Bibliography: | Application Number: KR20137002277 |