Phosphated polyurethane dispersions: Synthesis, emulsification mechanisms and the effect of the neutralising base

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dc.contributor.authorMequanint K.
dc.contributor.authorSanderson R.D.
dc.date.accessioned2011-05-15T15:57:13Z
dc.date.available2011-05-15T15:57:13Z
dc.date.issued2002
dc.description.abstractPhosphate-containing polyester macroglycols with different phosphate contents were synthesised from a phosphorus-containing monomer, a dicarboxylic acid and a diol. The macroglycols were then used as a soft segment for the preparation of segmented polyurethane dispersions. Aqueous dispersions were made by phase inversion from the organic solvent after the carboxylic acid groups were neutralized. Phase inversion was found to take place in three distinct stages. The stability and particle size of the polyurethane dispersions were dependent of the amount of carboxylic acid groups present, the degree of neutralisation and the neutralising cations. Metal-neutralized polyurethane dispersions gave smaller particle sizes and the corresponding films showed higher swelling in water due to the ease of hydration. The particle size and stability of the tertiary amine-neutralised polyurethanes were found to be related to the water solubility of the amines at a given dispersion temperature. Particle size increases for the higher alkyl chain neutalising amines due to the poor hydration of the corresponding cations.
dc.description.versionConference Paper
dc.identifier.citationMacromolecular Symposia
dc.identifier.citation178
dc.identifier.issn10221360
dc.identifier.other10.1002/1521-3900(200202)178:1<117::AID-MASY117>3.0.CO;2-Y
dc.identifier.urihttp://hdl.handle.net/10019.1/10276
dc.subjectpolyurethan
dc.subjectconference paper
dc.subjectemulsion
dc.subjecthydration
dc.subjectmaterial coating
dc.subjectparticle size
dc.subjectphosphorylation
dc.subjectpolymerization
dc.subjectsynthesis
dc.titlePhosphated polyurethane dispersions: Synthesis, emulsification mechanisms and the effect of the neutralising base
dc.typeConference Paper
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