American Cyanamid Company

Cytec Technology Corporation

Sun Y Huang

Robert D Giglia

Andrea Leone-Bay

Paul S Waterman

Joseph M Schmitt

Michael M Fisher

Quaternized tertiary aminomethyl acrylamide polymer emulsions are treated by 1) adjusting the pH to about 3.6 to about 4.8, 2) adding a formaldehyde scavenger, 3) adjusting the water content of the aqueous phase to result in about 10-45 weight percent of quaternized aminomethylated acrylamide polymer and 4) heating the resultant emulsion at from about 40.degree. C. to about 80.degree. C. for about 3 to about 20 hours so as to render them more stable, capable of inversion in water independent of water temperature or pH of the medium flocculent and superior dewatering ability.

Quaternized teriary aminomethyl acrylamide polymer microemulsions with

Quaternized tertiary aminomethyl acrylamide polymer emulsions are treated by 1) adjusting the pH to about 3.6 to about 4.8, 2) adding a formaldehyde scavenger, 3) adjusting the water content of the aqueous phase to result in about 10-45 weight percent of quaternized aminomethylated acrylamide polymer and 4) heating the resultant emulsion at from about 40.degree. C. to about 80.degree. C. for about 3 to about 20 hours so as to render them more stable, capable of inversion in water independent of water temperature or pH of the medium flocculant and superior dewatering ability.

Quaternized tertiary aminomethyl acrylamide polymer microemulsions with

In electrochromic devices having a layer of electrochromic material, e.g. tungsten oxide, in contact with a polymeric electrolyte layer, the stability and speed of the device are improved by using a copolymer of 2-acrylamido-2-methylpropanesulfonic acid and vinyl sulfonic acid as the polymeric electrolyte.

Sulfonic acid copolymer electrolyte

Electrochromic devices are described having a layer of electrochromic material, e.g. WO.sub.3, in contact with a layer of organic electrolyte resin, with electrode means for changing electrochromic properties of the device by electric field means. The electrolyte resin layer comprises a hydrophilic layer of homopolymer of poly(2-acrylamido-2-methylpropanesulfonic acid) with an organic humectant and in some preferred embodiments may further comprise a thinner layer of less hydrophilic electrolyte resin between the homopolymer and electrochromic layers.

Electrochromic cells with improved electrolyte system

Electrochromic device containing acid copolymer electrolyte

Electrochromic devices are described having a layer of electrochromic material, e.g. WO.sub.3, in contact with a layer of organic electrolyte resin, with electrode means for changing electrochromic properties of the device by electric field means. The electrolyte resin layer comprises a hydrophilic layer of homopolymer of poly(2-acrylamido-2-methylpropane sulfonic acid) and in some preferred embodiments may further comprise a thinner layer of less hydrophilic electrolyte resin between the homopolymer and electrochromic layers.

Poly(beta-alanine) acts as an effective flocculant in water treatment, especially those waters containing colloidal suspensions. In solution, these polymers exhibit a degree of metastability of significance in the flocculation of effluent substrates.

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Stamford, CT, United States of America

Sun Y Huang