The Dow Chemical Company

Don L Stevens

Harold E Filter

Andrew T Graham

Keith Roberson

The subject invention pertains to a process for preparing a fluid absorbent polymer wherein an ethylenically unsaturated monomer mixture is dispersed as droplets in an inert organic phase containing a hydrophobic suspending agent, such droplets being polymerized to form polymer particles having a hydrophobic surface, the improvement comprising blending the polymer particles with a hydrophilic material in the absence of an organic solvent, such as to render the hydrophobic surface hydrophilic.

Direct application of surface treatment to absorbent polymers

A method is disclosed for encapsulating and solidifying spent ion exchange beads contained in a container to form an ion exchange bed with a solidification resin without the necessity for applying shear in the bed by an external force such as by a mixing impeller. A solidification resin is flowed through the ion exchange bed by plug flow to intermix with and encapsulate each ion exchange bead therein. The resin is cured to form a uniform, solidified monolith of said ion exchange beads in said container. When the ion exchange bed contains free water, the process also effects the removal of substantial portions of the free water and also emulsifies and solidifies free water remaining in the bed.

In situ solidification of ion exchange beads

Disclosed is a novel fire extinguishing composition comprising a heat and gas producing pyrotechnic composition comprising a binder and an oxidizer, and having dispersed therein a halogen containing fire extinguishing agent. The pyrotechnic, when ignited, thermally disseminates the fire extinguishing agent onto the fire.

Fire extinguishing composition

Disclosed is a solid propellant composition in the form of a munition which comprises an inorganic acid salt in intimate combination with the reaction product of a carboxyl bearing polymer and a glycidyl thioether. The composition is prepared by mixing the oxidizer, carboxyl containing polymer, and glycidyl thioether and curing the resulting mixture to a coherent grain. Unexpectedly, an excellent cure is achieved in the presence of the oxidizer.

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Sanford, MI, United States of America

Don L Stevens