Rohm and Haas Company

Marvin J Hurwitz

James S Clovis

David H Clemens

Robert M Myers

Virginia L Cunningham

Noyes L Avery

Robert W Walker

Robert P Fellman

Gerald F Slack

Strong base ion exchange resins derived from crosslinked vinylbvenzyl chloride polymers are particularly suitable for purifying condensate waters for steam regenerating equipment. Preferred embodiments utilize gellular anion exchange resins to remove corrosion products from boiler condensate waters.

Method of purifying condensate waters for steam regenerating equipment

Wear-resistant, high compressive strength permanent dental restorations are prepared from novel compositions comprising (a) a liquid monomer system comprised of one or more monoethylenically unsaturated monomers and one or more polyethylenically unsaturated monomers, (b) a solid particulate system insoluble in the liquid monomer system (a) comprised of a mixture of both organic and inorganic particulate substances, and (c) a free radical initiator system.

Permanent dental restorative material

This invention relates to certain novel anion exchange resins and the method of making them. It relates more particularly to aminated cross-linked polymers of bis(chloromethyl(styrene which exhibit improved anion exchange properties, and to the method of preparing the same.

Aminated crosslinked copolymers of bis(chloromethyl) styrene which

A novel process is described for the removal and/or recovery of dissolved antimony from an industrial stream, such as a waste stream, using a strong acid and/or a strong base ion exchange resin, in the hydrogen and hydroxyl forms respectively, to adsorb the antimony.

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Elkins Park, PA, United States of America

Marvin J Hurwitz