Synthesis and properties of anionic aqueous polyurethane dispersions
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منابع مشابه
Synthesis and Characterization of Anionic Polyurethane Dispersants for Waterborne Paints
Anionic polyurethane dispersants APUDs were used as dispersing agents in formulation of waterborne paints. The APUDs were synthesized by three steps. In the first step, macromonomer diisocyanate having carboxylic acid was prepared by isophorone diisocyanate IPDI, dimethylol propionic acid DMPA in presence of acetone as solvent and dibutyltin dilaurate DBTDL as catalyst. Then, carboxylic polyure...
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Aseries of water dispersible polyurethanes containing carboxylate anion as the hydrophilic pendant group were prepared from toluene diisocyanate (TDI), 1,4butanediol (1,4-BDO), dimethylol propionic acid (DMPA) and different molecular weight of polytetramethylene glycol (PTMG). IR Spectroscopy was used to check the end of polymerization reaction and characterization of polymer.The effect of PTMG...
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The importance of acidic lipids as tissue ion exchange agents has been recently emphasized by a number of investigators (14). In addition, evidence is accumulating that these lipids may play a role in tra-nsmembrane cation transport (3, 5, 6). Consequently, it was felt desirable to study the ionic structure and ion exchange capabilities of the purified acidic lipids. Phosphatidylserine was sele...
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Nanoscale zerovalent iron (NZVI) particles are 5–40 nm sized Fe/Fe-oxide particles that rapidly transform many environmental contaminants to benign products and are a promising in situ remediation agent. Rapid aggregation and limited mobility in water-saturated porous media limits the ability to deliver NZVI dispersions in the subsurface. This study prepares stable NZVI dispersions through phys...
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ژورنال
عنوان ژورنال: Journal of Applied Polymer Science
سال: 2003
ISSN: 0021-8995,1097-4628
DOI: 10.1002/app.2368