American Cyanamid Company

Girish Chandra Barua

Daniel Elmer Nagy

Herbert Burkhard

Novel water-soluble acrylamide copolymers contain 40 to 70 percent by weight acrylamide units, at least 30 percent of hydrophobic vinyl units and at least 10 percent of vinyl units having ionic properties. In aqueous solution these copolymers have the properties of cationic or amphoteric surface active agents.

Cationic and amphoteric surfactants

Polymeric surfactants are copolymers of acrylamide with 30 - 60 wt. percent of acrylic esters or alkyl or alkoxymethyl acrylamides having molecular wt. from 800 to 10,000 amu.

Non-ionic surfactants from water soluble copolymers of acrylamide with

In the emulsion polymerization of polymers which comprise monomers selected from acrylic acid, methacrylic acid, alkyl esters of those acids and which may also comprise other compatible vinyl monomers such as styrene, vinyl acetate, N-methylolacrylamide, acrylonitrile, itaconic acid and the like, the emulsifier for the emulsion polymerization is a surface-active agent having the formula ##STR1## wherein ##STR2## is the acyl radical of a fatty acid having 7 to 21 carbon atoms and M is selected from ammonium, the alkali metals, and certain alkaline earth metals, and x is 1 to 3.

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Stamford, CT, United States of America

Girish Chandra Barua