Ppg Industries, Inc.

Patrick E Hillman

Preston S White

Polybutadiene having high cis-1,4-configuration and dissolved in substantially anhydrous liquid organic solvent is reacted with chlorine, bromine or a mixture thereof. The solvent consists essentially of a mixture of one or more perhalogenated alkanes and one or more partially halogenated alkanes and fine particles of substantially thermoplastic halogenated polybutadiene precipitate from the solvent. The fine particles are separated from the bulk of the solvent.

Halogenation of butadiene polymers in mixed solvents

Disclosed is a method of preparing a permionic membrane by contacting the permionic membrane with a plasticizer and an electroconductive material, and hot pressing the permionic membrane, the plasticizer, and the electroconductive material.

Method of forming a permionic membrane

Rubbery, tacky polymer is mechanically subdivided in the presence of fine particles of substantially thermoplastic halogenated polymer.

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Corpus Christi, TX, United States of America

Patrick E Hillman