Waterborne UV/EB curing systems

Uminski, Maciej

doi:10.1108/03699429710168708

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…The coatings and printing inks are currently the main application areas for UV curing, the former accounting for the major turnover in terms of volume and sales (Oldering, 1991; Paul, 1997). The UV curing reactions are induced by the absorption of high‐intensity UV radiation by the photoinitiator and subsequent free radical polymerisation leading crosslinking of monomers and oligomers (Fouassier and Rabek, 1993; Uminski, 1997). In recent years, UV curing technology has become more and more prominent.…”

Section: Introductionmentioning

confidence: 99%

UV curable polyester‐based polyurethane acrylate nanocoating

Mhatre

Mahanwar

Shertukde

et al. 2010

Pigment &Amp; Resin Technology

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PurposeThe paper's aim is to synthesise ultraviolet (UV) curable polyurethane acrylate based on polyester polyol and to study change in its mechanical, chemical, optical and weather resistance properties with varying amount of nanosilica. It also seeks to determine its optimum loading levels for property maximisation.Design/methodology/approachNew UV curable polyurethane acrylate has been synthesised using polyester polyol, blend of isophorone diisocyanate and toluene diisocyanate and hydroxyl ethyl acrylate. This resin was incorporated with nanosilica (1‐3 per cent) on the basis of total solids. The newly synthesised material was characterised by fourier transform infrared spectroscopy, gel permeation chromatography, X‐ray diffraction and scanning electron microscopy. The mechanical, chemical and optical properties of the coating films were studied and compared.FindingsThe hardness, tensile strength and abrasion resistance show significant enhancement with increasing amount of nanosilica. It is also found that UV cured polyurethane acrylate nanocoating exhibited improved weather resistance. The optimum concentration of nanosilica for better performance is found to be 3 per cent of total solids. The improvement is the result of inherent nature of nanosilica.Research limitations/implicationsNanosilica used in present context is having 10 nm mean diameter and near about 600 m2/g surface area. Nanosilica having different particle size, surface area and surface modification can be used to improve more specific properties.Practical implicationsAddition of nanosilica particles to polyurethane acrylate coating is a simple and inexpensive method resulting in phenomenal increase in properties.Originality/valueThe new organic‐inorganic hybrid nanocoating with improved weather resistance was synthesised. These coatings could find applications in demanding fields such as automotive topcoats.

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Section: Introductionmentioning

confidence: 99%