Anionic acrylate

It was previously mentioned that PDADMAC (Cat-Floe) was the first commercial flocculant approved for potable water [26]. Since then, PDADMAC has been continuously used for coagulation/flocculation both in potable water and waste water treatment. A good example of the performance of PDADMAC in the coagulation of colloidal solids is the reduction of turbidity in fresh water of 150 mg L 1 of Ca(OH)2. A reduction of 82% in turbidity is observed with the addition of only 2 mg L 1 of branched PDADMAC [217]. In addition, PDADMAC and copolymers of DADMAC are reported to be effective in the removal of hard-to-elimi-nate impurities in the water treatment industry. Emulsified impurities from streams of a petroleum refinery waste water and an automotive oily effluent water have been removed by the use of water soluble copolymers consisting essentially of DADMAC and small amounts of anionic acrylic monomers [89]. 

The experiments of acrolein oxidation in absence of molecular oxygen confirm a dense adsorption layer of oxidized Cj-compounds, acrylic anion + acrylic acid, figure 11. It is remarkable that despite of the increasing adsorption of the oxidized Cj-compounds the rate of acrolein consumption is hardly reduced. IR analysis of surface intermediates have lead to the assumption that deprotonation of chemisorbed acrolein and oxidation of the intermediate to acrylic anion are fast reactions. Therefore, the protonation of the acrylic anion and the following desorption of acrylic acid are regarded as rate determining steps leading to accumulation of the acrylic anion on the surface of the catalyst [12]. 

Rane BR, Gujarathi NA, Patel JK. Biodegradable anionic acrylic resin based hollow microspheres of moderately water soluble drug rosightazone maleate Preparation and in vitro characterization. Drug Development and Industrial Pharmacy. December 2012 38(12) 1460-1469. PubMed PMID 22356275. 

Uses Defoamer for inks, coatings, nonionic and anionic acrylic emulsion systems, alkyd, polyester, PVAc, urethane, and terpolymer systems Regulatory DSL listed... 

Lee et al. (1990) studied the PV of EtOH-water mixtures by cationic-anionic interpenetrating polymer network (IPN) membranes. The cationic PU prepared by quaternizing the tertiary amine from A -methyldiethanolamine and the anionic acrylic copolymer from acrylic acid were used as the cationic and anionic components. The separation factor increased as the content of the anionic component in the membrane increased. The ion content in the membrane was also found to be an important factor for the optimum permseparation of water. Better performance was achieved by PEG-based PU as the cationic component of the IPN membrane. The highest selectivity was observed for the IPN membrane with 10 wt% of PEG-based PU. 

Silanated anionic acrylate-styrene pol)nner dispersions (96) Tronox 470 Tranox Ltd. 

The hydroxy-functional polyurethane dispersions can be cross-linked with MF resins or blocked isocyanates. Blocked isocyanates can also be used with water-reducible anionic acrylic or polyester resins instead of an MF resin oxime blocked isocyanates are commonly used, owing to their high reactivity. Oxime blocked aliphatic isocyanates are more stable to hydrolysis than oxime blocked aromatic isocyanates (32). As mentioned earlier alcohol blocked isocyanates are used in cationic electrodeposition coatings. 

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