Synthesis and polymerization of a radiation curable hyperbranched resin based on epoxy functional fatty acids
2004 (English)In: Progress in organic coatings, ISSN 0300-9440, Vol. 50, no 3, 193-198 p.Article in journal (Refereed) Published
A radiation curable resin has been synthesized from a hydroxy functional hyperbranched polyether onto which an epoxy functional fatty acid, vernolic acid, has been attached. The resin was cationically polymerized in presence of different amounts of vernolic acid methyl ester as a reactive diluent. The coating mixtures contained up to 30 wt.% methyl ester and all formulations polymerized readily and formed crosslinked films with T-g's between 16 and -18degreesC, where the addition of the reactive diluent lowered the T-g with approximately 10degreesC for each 10 wt.% diluent added. The viscosities of the coating mixtures were also heavily influenced by the presence of the reactive diluent, from the pare hyperbranched epoxy functionalized polymer with a viscosity of 4 100 mPa s to the formulation containing 30 wt.% methyl ester with a viscosity of 460 mPa s. The viscosities of the mixtures and the hardness of the films were also compared with a model oil based on trimethylol propane, i.e. a structurally similar resin without a polyether core. The model oil was found to have a lower viscosity than the other mixtures and produced a soft film with a low T-g (-21degreesC) after polymerization.
Place, publisher, year, edition, pages
2004. Vol. 50, no 3, 193-198 p.
epoxy, fatty acid, hyperbranched polymer, reactive diluent, radiation curing, epoxidized vegetable-oils, galamensis seed oil, vernonia-galamensis, cationic polymerization, vernolic acid, coatings, triacylglycerols, chromatography, monomers
IdentifiersURN: urn:nbn:se:kth:diva-23459DOI: 10.1016/j.porgcoat.2004.02.005ISI: 000221714400006ScopusID: 2-s2.0-2342649590OAI: oai:DiVA.org:kth-23459DiVA: diva2:342157
QC 20100525 QC 20110926 QC201507272010-08-102010-08-102015-07-27Bibliographically approved