3m Innovative Properties Company

Taib K Ansera

Jerald K Rasmussen

Michael R Berrigan

Kannan Seshadri

Robert T Fitzsimons, Jr

Catherine A Bothof

James I Hembre

Craig Allen Perman

Andrew W Rabins

Del R Lawson

Glen H Bayer, Jr

Jason R Jacobson

Eric E Wisted

Semi-interpenetrating polymeric networks are described. More specifically, the semi-interpenetrating polymeric networks include at least two polymers that are closely associated. The first polymer is an ionic polymer that is not crosslinked. The second polymer is a cross-linked polymer that can be either another ionic polymer or a non-ionic polymer. Methods of making the semi-interpenetrating polymeric networks, articles containing the semi-interpenetrating polymeric networks, and methods of using the semi-interpenetrating polymeric networks are also described. The semi-interpenetrating polymeric networks can function as ion exchange resins.

Semi-interpenetrating polymer network

This invention provides a one-piece multilayer article for use in solid phase extraction that includes at least two porous support layers and a solid phase extraction medium, wherein the porous support layers are thermo-mechanically attached at at least one thermo-mechanical attachment site. At least one of the porous support layers can be a prefilter layer.

Extraction articles and methods

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Saint Paul, MN, United States of America

Taib K Ansera