Highly functional methacrylated bio-based resins for UV-curable coatings

Yu, Arvin Z.; Sahouani, Jonas M.; Webster, Dean C.

doi:10.1016/j.porgcoat.2018.05.035

Cited by 38 publications

(23 citation statements)

References 34 publications

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“…In addition, the activation energy of the epoxy at several curing temperatures was calculated from Equation (14) and listed in Table 4. It was found that the activation energy increased with increase of PEG in the resins due to the steric hindrance of PEG structure [49,50], whereas the activation energy of HBE15P decreased because HBE15P had a large amount of equivalent active epoxy group per mass sample (low EEW) which facilitated the curing reaction due to the weakening in the interaction of the molecular chain [17,51].…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Thermal Properties and Curing Kinetics of Hyperbranched BPA/PEG Epoxy Resin

2019

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The hyperbranched epoxy resins (HBE) composed of bisphenol A (BPA) and polyethylene glycol (PEG) as reactants and pentaerythritol as branching point were successfully synthesized via A2 + B4 polycondensation reaction at various BPA/PEG ratios. The 13C NMR spectra revealed that the synthesized HBE mainly had a dendritic structure as confirmed by the high degree of branching (DB). The addition of PEG in the resin enhanced degree of branching (DB) (from 0.82 to 0.90), epoxy equivalent weight (EEW) (from 697 g eq−1 to 468 g eq−1) as well as curing reaction. Adding 5–10 wt.% PEG in the resin decreased the onset and peak curing temperatures and glass transition temperature; however, adding 15 wt.% PEG in the resin have increased these thermal properties due to the lowest EEW. The curing kinetics were evaluated by fitting the experimental data of the curing behavior of all resins with the Šesták–Berggren equation. The activation energy increased with the increase of PEG in the resins due to HBE’s steric hindrance, whereas the activation energy of HBE15P decreased due to a large amount of equivalent active epoxy group per mass sample. The curing behavior and thermal properties of obtained hyperbranched BPA/PEG epoxy resin would be suitable for using in electronics application.

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Section: Resultsmentioning

confidence: 99%

Synthesis, Thermal Properties and Curing Kinetics of Hyperbranched BPA/PEG Epoxy Resin

2019

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“…UV curing is of growing interest due to its unique economic and ecological advantages: ultrafast curing at ambient temperatures, 100% solids or low volatile organic compound formulations, low energy usage, and high-performance coatings. , As a result, UV-curable coatings are widely used for printing, furniture, plastic substrates, optical fibers, wood flooring, headlight lenses, and metal substrates. − Generally, a UV-curable system contains three indispensable components: reactive diluents, oligomer resins, and photoinitiators . Photopolymerizable reactive diluents are usually based on acrylate, vinyl, and epoxide groups and facilitate easy processing of the coating by lowering the viscosity of the formulation. , Furthermore, reactive diluents can increase cross-link density, enhance cure speed, and modify the tensile properties of UV-curable coatings . Currently, commercial reactive diluents are typically derived from petroleum-based products, which has caused sustainability concerns and stimulates the development of bio-based raw materials .…”

Section: Introductionmentioning

confidence: 99%

Bio-Based Furanic Di(meth)acrylates as Reactive Diluents for UV Curable Coatings: Synthesis and Coating Evaluation

Qian

Sutton

et al. 2021

ACS Sustainable Chem. Eng.

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A series of photocurable di(meth)acrylates from asymmetric and symmetric furan-based diols were prepared in good yields and evaluated for use as reactive diluents in UVcurable coatings. The furan-based di(meth)acrylates were found to have viscosities of ca. 9−91 mPa•s at 20 °C and were used as reactive diluents with a commonly used urethane acrylate resin to prepare photopolymerizable coating systems. The coating formulations were cured using UV light, and properties such as solvent resistance, hardness, impact strength, and adhesion were evaluated. The thermal properties of the coatings were characterized using differential scanning calorimetry and thermogravimetric analysis. Dynamic mechanical analysis was used to determine the viscoelastic properties of the coatings. Nanoindentation experiments were performed to evaluate the modulus of elasticity and hardness of the coatings. In general, the coatings containing the furan-based (meth)acrylates had high hardness, elastic modulus, and glass transition temperature.

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“…4,5 Waterborne polyurethane (WPU) coating, as a green waterborne coating product, 6,7 is widely used for its excellent properties such as environmental protection, non-flammability, high flexibility, and good structural controllability. [8][9][10][11] However, due to the hydrophilic groups and linear structure in its chain, WPU has some inherent disadvantages, such as slow curing efficiency, poor mechanical strength, and water sensitivity. [12][13][14] In order to overcome these defects, crosslinking modification is one of the most attractive methods.…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of green UV‐curable itaconic acid cross‐linked modified waterborne polyurethane coating

Dong

Ren

Duan

et al. 2021

J of Applied Polymer Sci

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Waterborne polyurethane (WPU) coating, as a kind of green product, can replace solvent polyurethane coating, but its application in the field of coating is limited since its defects such as slow curing efficiency, low strength, and water resistance. In this study, a trifunctional itaconic acid-based crosslinking agent (IHA) was synthesized from itaconic acid and hydroxyethyl acrylate. A series of green UV-curable WPU coatings were prepared by introducing IHA into WPU prepolymer in different proportions (2.5 $ 10 wt.%). IHA posed as crosslinking agent in WPU, which can not only enhance strength, but also accelerate curing rate in WPU coatings. The results demonstrated that the gel content and hydrophobic angle of the modified WPU coating (WPU-IHA) are increased by 25.6% and 34.8 , respectively, indicating a good water resistance.Most notably, due to the increase of crosslinking degree and the decrease of chain mobility, the UV-curable WPU coating shows excellent mechanical properties with 21.9 MPa in tensile strength and a pencil hardness of 5H, which is substantially higher than that of pure WPU coatings. Therefore, the IHA shows great potential to substitute petroleum-based crosslinking agents in the preparation of environmentally friendly UV-curable WPU coatings with high strength and good surface scratch hardness.

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Highly functional methacrylated bio-based resins for UV-curable coatings

Cited by 38 publications

References 34 publications

Synthesis, Thermal Properties and Curing Kinetics of Hyperbranched BPA/PEG Epoxy Resin

Synthesis, Thermal Properties and Curing Kinetics of Hyperbranched BPA/PEG Epoxy Resin

Bio-Based Furanic Di(meth)acrylates as Reactive Diluents for UV Curable Coatings: Synthesis and Coating Evaluation

Preparation and properties of green UV‐curable itaconic acid cross‐linked modified waterborne polyurethane coating

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