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Nanostructured Urethane-Acrylic Hybrid Dispersions (Paperback)
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Discovery Miles 21 010
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Nanostructured Urethane-Acrylic Hybrid Dispersions (Paperback)
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This book reports on studies of the synthesis, morphology and the
thermal and mechanical characterisation of a range of
urethane-acrylic hybrid dispersions. N-methyl pyrrolidone (NMP) was
used as a co-solvent in the preparation of some of these
polyurethane dispersions (PUDs). NMP is commonly used as a
co-solvent in PU coatings as it acts as both a processing and also
as a coalescing aid. Environmental legislation will eventually
demand its replacement. To this end, NMP was replaced in the
synthesis by methyl methacrylate, or styrene. These monomers lead
to the formation of urethane-acrylic hybrids. The monomer type and
the composition, the glass transition temperature, controlled by
copolymerising with n-butyl acrylate, the mode of monomer addition
and the synthesis techniques were the main variables studied in
this programme. The advantages of these hybrids with respect to
latex blend systems were also studied.
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