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Influence of CaCO 3 on photocrosslinking and properties of UV‐cured coatings based on an epoxy diacrylate resin and hexanediol diacrylate
Author(s) -
Hung Dao Phi,
Hien Le Xuan
Publication year - 2019
Publication title -
vietnam journal of chemistry
Language(s) - English
Resource type - Journals
eISSN - 2572-8288
pISSN - 0866-7144
DOI - 10.1002/vjch.2019000134
Subject(s) - epoxy , materials science , photopolymer , polymer science , polymer chemistry , composite material , polymer , polymerization
Effects of CaCO 3 content on photocrosslinking and properties of UV‐curable coatings based on epoxy diacrylate resin (EDA), hexanediol diacrylate (HDDA) and photoinitiator I.184 have been studied. It was found that in investigated coatings with the weight ratio EDA/HDDA/I.184 = 50/50/3, CaCO 3 content in the range of 10‐40 % provided fine and smooth films in used substrates. The presence of CaCO 3 significantly reduced conversion of acrylate groups and quality of the UV‐cured coatings in comparison with the neat one. The increase of CaCO 3 content slowed down the photocrosslinking process and inconsiderably affected to properties of investigated coatings in its range of 10‐20 %, but led to obvious decrease of their impact resistance and gloss in its further augment up to 40 %. Coating containing optimal CaCO 3 content of 20 % from technical and economical points of view was determined to have gel fraction, relative hardness and gloss of 60 o of 90 %; 0.94 %; 92.3 % after 2.4s of UV‐exposure, respectively.