Abstract
Abstract Epoxy binder based on 3,4-epoxycyclohexylmethyl-3′,4′-epoxycyclohexanecarboxylate (EEC) and polytetrahydrofurane diglycidyl ether (PTHDE) was cured using four types of commercial cationic UV-photoinitiators (two iodonium salts and two sulfonium salts) and a medium-pressure mercury lamp. Influence of a type of photoinitiator on thermal, optical, mechanical and barrier features of the varnish coatings was investigated. Moreover, conversion of cycloaliphatic epoxy (CC) and glycidyl (GC) groups was analyzed. Generally, systems containing iodonium or sulfonium hexafluorophosphates exhibited higher GC, gel content, gloss and water-vapor transmission rate as well as lower yellowness and hardness than samples based on SbF6−-type salts. Photoinitiator type did not significantly affect CC parameter, however, application of the iodonium salts mixtures influenced on CC as well as GC, thermal features and gloss of epoxy varnishes and coatings.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
