Calgon Corporation

Gloria D Sinkovitz

Kenneth W Dixon

Andrew J Sharpe, Jr

Robert Clayton Slagel

Kevin J Hipolit

This invention is directed to the use of an improved composition for inhibiting the precipitation of calcium oxalate in aqueous systems. The composition contains: (a) a water soluble phosphate; and (b) a water soluble polycarboxylate having a weight average molecular weight of about 7,000 to about 9,000; wherein the ratio of component (a) to component (b) ranges from 10:1 to 1:10.

Process for controlling calcium oxalate scale over a wide pH range

Electroductive article comprising a coating composition of copolymers containing from 70 percent to 85 percent by weight diallyldimethylammonium chloride and at least 15 percent but less than 30 percent by weight N-methylolacrylamide and optional comonomers is disclosed. These electroconductive polymers are coated onto a substrate and become water-insensitive thereafter.

Water-insensitive electroconductive article comprising a substrate

Electroconductive copolymers of diallyldimethylammonium chloride and at least 15 percent by weight acrylamide which exhibit improved solvent holdout.

Electroconductive polymers having improved solvent holdout properties

Copolymers of a cationic electroconductive monomer and a crosslinkable monomer. These polymers are electroconductive and become water-insensitive after being applied to a substrate.

Water-insensitive electroconductive polymers

Acids, particularly dilute acid solutions thickened with copolymers of dimethyl diallyl ammonium chloride and a monomer capable of postreaction after polymerization to provide branching or partial crosslinking, are useful as oil well drilling and fracturing fluids for stimulating well production.

Polymers for acid thickening

Paper products exhibiting markedly improved dry strength properties are produced by adding to the cellulose paper dispersion a chitin-based compound comprising chitosan alone or a graft copolymer of certain acrylic and/or diallylic monomers grafted onto the chitosan as a substrate.

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Bridgeville, PA, United States of America

Gloria D Sinkovitz