Novel water-dispersed polyurethanes based on tetramethyl xylene diisocyanate (TMXDI),
polycaprolactone or polytetramethylene glycols and alipbatic diamine chain extenders were
synthesised. 2,2-bis(hydroxymethyl) propionic acid (DMPA) and triethylamine (TEA)
were used respectively as potential carboxylic anionic emulsifying centres and neutralising
agent in the resulting aqueous phase to form pendent quaternary ammonium salts. These
were necessary to provide high hydrophilicity to the polyurethanes sufficient to make the
polyurethanes easily dispersed in water without the assistance of organic solvent. [Continues.]
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.
Thailand, Government. Prince of Songkla University.