The Dow Chemical Company

John P McGraw

Stephen A Noding

Charles W Martin

Terry D Gordon

Neal Anthony Grob

Melisa Davila

Stan H Baker

Paul R Peters

A novel, improved process for forming a thin, adherent coating of a perfluorocarbon ionomer on a polymeric substrate which is typically in powdered form, fibrous form, or a mixture of powdered and fibrous forms, from a colloidal dispersion of the perfluorocarbon ionomer in a liquid medium which consists essentially of water and is substantially free of organic solvents, comprising adding a) the colloidal dispersion and b) a salt or a strongly ionizing acid to a vessel containing the polymeric substrate, and subjecting the dispersion, salt or acid and polymeric material to high shear conditions whereby a thin, durable coating of the perfluorocarbon ionomer is formed on the polymeric substrate.

Solventless process for forming thin, durable coatings of

Materials for treating and/or repairing electrolytic cell separators, especially diaphragms for chlor-alkali cells, including processes for making such treating materials and processes for using such materials to treat and/or repair an electrolytic cell separator or chlor-alkali diaphragm.

Processes and materials for treatment and repair of electrolytic cell

A novel electrochemical cell monitoring apparatus for a caustic-chlorine electrolyzer, which includes a voltmeter, a standard calomel reference electrode, a flexible conduit for cell bath, preferably of multilayer construction, and a conduit support body placed between electrode walls to prevent crimping of the conduit when the walls of the electrolyzer are pressed together or dislocation during operation, and the method of monitoring a selected electrochemical cell which includes connecting an electrode of the selected cell and the standard reference electrode to the voltmeter, providing cell bath from the electrode of the selected cell through the conduit to the liquid junction of the standard reference electrode, operating the electrolyzer and reading the voltage on the voltmeter to compare with a predetermined standard voltage.

Novel caustic-chlorine electrochemical cell monitoring apparatus and

Growing community of inventors

Denham Springs, LA, United States of America

John P McGraw