Aluminum Company of America

H Philip Hsieh

Larry F Wieserman

Edward S Martin

Karl Wefers

Kathryn Cross

James J Koenig

William H Quayle

A treated permeable inorganic membrane having good chemical stability over a pH range of from 1 to 14. The monomolecular layer of organic acid material is formed on the membrane surface by contacting phosphonic acid having the formula RPO(OH).sub.2 ; phosphinic acid having the formula RR'PO(OH); monocarboxylic acids having the formula RCOOH; dicarboxylic acids having the formula R'(COOH).sub.2 ; or boronic acid having the formula RB(OH).sub.2.

Surface treated permeable inorganic membranes and method of making same

An improved process for dispersing inorganic fillers, such as alumina trihydrate, in a polyester resin is disclosed wherein the improvement comprises significantly lowering the viscosity of the polyester-filler dispersion by coating the filler with 0.05 to 1.0 percent, based on the weight of the filler, of a polar phosphate ester surfactant containing acid groups and polar ether groups, prior to adding the filler to the polyester resin.

Phosphate ester coating on inorganic fillers for polyester resins

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Murrysville, PA, United States of America

H Philip Hsieh