Recently scientists synthesised UV-curing waterborne polyurethane-acrylate coating and its photopolymerisation kinetics by using FT-IR and photo-DSC methods.
Environmentally friendly waterborne polyurethane-acrylate (WPUA) oligomers and ultraviolet curing WPUA films (UV-WPUA) were prepared. The thermal stability, solvent-resistance and mechanical properties of the films were investigated. FT-IR and photo-DSC methods were used to investigate the photopolymerisation kinetics of the UV-WPUA films.
Providing a theoretical guidance
The results showed that UV-curing films offered the optimum combination of properties when the polyether polyol (NJ-330), isophorone diisocyanate (IPDI), hydroxyethyl methyl acrylate (HEMA) and dimethylolbutanoic acid (DMBA) were used as the raw materials and the mass ratio of oligomer: monomer butyl acrylate (BA): photoinitiator was fixed at 66:30:4. Reaction kinetics of different photoinitiators systems were calculated by Kissinger equation and Crane equation, thus providing a theoretical guidance for the optimisation of diluent and photoinitiator in UV-curing coating industry.
Continue at: http://www.european-coatings.com/Raw-materials-technologies/Raw-materials/Synthesis-of-UV-curing-waterborne-polyurethane-acrylate-coating/(cpg)/LA0093?cpg=LA0093&utm_source=newsletter&utm_medium=email&utm_campaign=EC-NL-2018-07-18&utm_content=Synthesis-of-UV-curing-waterborne-polyurethane-acrylate-coating&uid=678731
The text above is owned by the site above referred.
Here is only a small part of the article, for more please follow the link