Rohm and Haas Company

Biwang Jiang

Eric Gustave Lundquist

Newman M Bortnick

Robert H Gore

Carlos Alfonso Cruz

Jiun-Chen Wu

Warren Harvey Machleder

Andrew M Savo

John David Finch

James Henry Barrett

Aaron Sarafinas

Richard J Piccolini

Garth Rockwood Parker, Jr

Martin J Deetz

James Nelson Alexander, Iv

Andrew Savo

Jr Garth Rockwood Parker

Martin John Deetz

There is provided a method for making swellable particles, said method comprising mixing initial particles, at least one monomer, at least one initiator, and at least one chain-transfer agent, wherein said mixing is performed under conditions in which said monomer is capable of forming oligomer or polymer or a mixture thereof. Also provided are swellable particles made by that method. Further provided is a method of making polymeric resin particles comprising mixing at least one subsequent monomer to those swellable particles and polymerizing said subsequent monomer.

Swellable particles

A method for preparing monodisperse crosslinked bead polymers by introducing droplets having a harmonic mean size from 50 to 1500 microns and comprising at least one monomer, at least one crosslinker and a free-radical polymerization initiator into an aqueous medium through orifices to produce an aqueous suspension of droplets having a volume fraction of droplets from 35 to 64%; wherein the droplets are not encapsulated; causing the aqueous suspension of droplets to flow in a downward direction in a pipe in which the temperature is maintained at least 20&#xb0; C. below the temperature at which the polymerization initiator has a half-life of 1 hour; and polymerizing the droplets in a reactor.

Method for producing polymer beads of uniform size

The present invention relates to a method of preparing porous macroreticular polymers comprising polymerizing one or more monoethylenically unsaturated monomers in the presence of a silicone based porogen.

Preparation of macroreticular polymers

Solid media useful for a variety of applications, such as separations, catalysis, drug carriers, sensors, and combinatorial chemistry, are disclosed. The solid media are prepared with PNPs having a diameter of 1 to 50 nanometers, the PNPs including as polymerized units a multi-ethylenically-unsaturated monomer. Also provided are methods for preparing the solid media.

Solid media

The present invention relates to a method of removing water immiscible porogens from macroreticular copolymers comprising distilling said porogen in water soluble organic solvent.

Water immiscible porogen removal process

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Horsham, PA, United States of America

Biwang Jiang