Effects of the Amount and Type of Diol Ring Openers on the Properties of Oligolactide Acrylates for UV-Curable Printing Inks

Abstract

<jats:p>This study aimed to synthesize low viscosity oligolactide acrylates for UV-curable inks from oligolactide diols. Firstly, low molecular weight oligolactide diols were prepared by ring opening reaction of L-lactide with diols. Oligolactide acrylates were then synthesized by functionalizing the oligolactide diols with acrylic acid. In this study, three diol ring openers having short and long alkyl chain length were used to investigate the effects of the amount and type of diols on the properties of the oligolactide acrylates. The obtained oligomers were characterized, and the viscosities of oligolactide acrylates were measured. Results showed that oligolactide acrylates were successfully synthesized in all cases of ring openers, as confirmed by 1H-NMR (proton nuclear magnetic resonance spectroscopy) and FTIR (Fourier transform infrared spectroscopy). An increase in the alkyl chain length of the ring openers resulted in oligomers with lower viscosity and a decrease in Tg. Following that, the obtained oligolactide acrylates were employed for the formulation of UV-curable screen printing inks and their properties were investigated. Results showed that the inks formulated from oligomers with lower molecular weight exhibited better ink flow. Additionally, all ink films cured by UV radiation were very flexible with excellent adhesion, high impact resistance, and excellent water resistance.</jats:p>

Synthesis of Poly(ε-caprolactone) Diacrylate for Micelle-Cross-Linked Sodium AMPS Hydrogel for Use as Controlled Drug Delivery Wound Dressing

“…In this research, PCLDA was synthesized from a PCL diol by end-chain modification or acrylation. Previously, S. Kulsirswad et al 25 synthesized oligolactide acrylate by an esterification reaction between oligolactide diol and acrylic acid. Such a hydroxyl end group of oligolactide diol can react with carboxylic groups of acrylic acid to obtain oligomers consisting of vinyl double bonds.…”

Preparation and properties of light-resistant printing UV ink modified with nano-TiO2 on wood substrate

“…UV inks are cured under a chemical process of polymerisation, which are motivated by free radicals under UV light. Therefore, UV inks are welcomed by printing manufactory and used in many areas such as plastic, paper, furniture, electrotechnics, machinery, and so on [1][2][3][4][5]. However, the growth in exterior applications of UV inks has raised questions about their durability, especially resistance to light aging.…”

Renewable epoxidized cardanol‐based acrylate as a reactive diluent for UV‐curable resins

“…1 In recent years, an intensive investigation has been done to develop sustainable materials from vegetable oil, [2][3][4] rosins, [5][6][7] lignin, 8,9 gallic acid, 10,11 and other renewable raw materials. 12 Photoinduced curing technology which possessed superior properties including high speed, fast production rate at ambient temperature, low energy consumption, less environmental damage, and free of volatile organic compounds, has a wide range of applications in coatings, 13,14 adhesives, 15,16 inks, 17,18 dental composites, 19 and composites. 20,21 Therefore, incorporating photoinduced curing technology into renewable materials will provide a promising "green + green" strategy to current organic coating industry.…”