Boron containing UV-curable epoxy acrylate coatings

In this study, bisphenol-A-based acrylated epoxy oligomers were prepared and utilized to improve the adhesion strength of polyester cords onto rubber. The structure of the oligomers was characterized by Fourier transform infrared spectroscopy and 1 H-NMR spectroscopy. Ultraviolet-curable adhesive formulations were prepared by using acrylated epoxy oligomers and applied onto the polyester cord fabric by a dip-coating method and irradiated. Ultraviolet-cured coatings were characterized by thermal and scanning electron microscope analysis, contact angle measurements. In the second stage of the experiment, ultraviolet-cured polyester cords were adhered onto rubber under heat and pressure. The prepared adhesive formulation was expected to improve the adhesion strength. The adhesion strength of the coated material was evaluated by using peel test as a function of the carboxyl/epoxide ratio. The adhesion strength of 18.0 N/cm was obtained when the carboxyl/epoxide ratio was set as 1. It was observed that peel strength, contact angle, and surface energy values of acrylated epoxies strongly depend on the acrylic acid content of the oligomer.

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“…The aromatic protons of phenyl rings were appeared at 6.7-7.2 ppm. The peak at 1.65 ppm is due to the -CH 3 protons in the cyclic ring [24,25].…”

Section: Determination Of Eew and Acid Value Of The Oligomermentioning

confidence: 99%

Synthesis and characterization of dual-curable epoxyacrylates for polyester cord/rubber applications

Yildiz

Güngör

Önen

et al. 2015

Journal of Industrial Textiles

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“…The coating performances of cross-linked MCBPs in terms of adhesion, pencil hardness, flexibility, and solvent resistance were investigated, and the results are tabulated in Table . The adhesion of organic coatings is closely related to its polar group content, which can significantly enhance the interaction between the coatings and substrate . As shown in Table , the adhesion of all the cured MCBPs on tinplate was as high as 5B (the highest level).…”

Section: Resultsmentioning

confidence: 96%

A New Sight into Bio-Based Polybenzoxazine: From Tunable Thermal and Mechanical Properties to Excellent Marine Antifouling Performance

Dai

Liu

et al. 2020

ACS Omega

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With the rapid development of bio-based polymers, polybenzoxazine derived from renewable resources has been widely investigated. However, there are few reports on the functional application of bio-based polybenzoxazine based on the special chemical structures of renewable compounds. In this work, an easy approach to prepare the polybenzoxazines with varied thermomechanical properties and excellent marine antifouling performance from renewable resources is presented. After a variety of mainchain-type benzoxazine polymers (MCBPs) were synthesized from the renewable daidzein, furfurylamine, polyetheramine, and paraformaldehyde, their chemical structures were identified by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy ( 1 H NMR). Then, their curing behaviors were monitored by differential scanning calorimetry and rheological tests. Results revealed that the cross-linked MCBPs with varied thermomechanical properties could be easily prepared by adjusting the molar ratio of polyetheramine and furfuramine. Notably, these cured MCBP films demonstrated excellent antibacterial and algaecidal properties due to the presence of daidzein and furan units. This work first presents the new application prospect of bio-based MCBPs, for example, in marine antifouling coatings.

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“…This could be probably because the system contained a large number of low degree polymerization oligomers or even non-reactive monomers because the existent oxygen consumed a part of free radicals, causing larger viscosity of the system and slower rate of the polymerization reaction. Gel content tests were applied to measure the curing and crosslinking degree of the formulations (Table 5) [23]. A great difference in the gel content existed in films cured under aerobic and anaerobic conditions, respectively.…”

Section: Influence Of Oxygen (O 2 ) Inhibition On the Properties Of Cmentioning

confidence: 99%

Effect of Graphene Carbon Nitride on Ultraviolet-Curing Coatings

Hang

Lü

et al. 2019

Materials

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Graphene carbon nitride (g-C3N4) was successfully prepared by semi-closed pyrolysis and then incorporated into the ultraviolet (UV)-curing system to synthesize different specimens of g-C3N4-hybridized UV-curing (g-C3N4/UV) coatings. The apparent appearance and dispersity g-C3N4 were characterized through X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR). The influence of the curing speed and mechanical properties was also tested. The dispersion level of g-C3N4 can be kept less than 1 μm by mechanical mixing. The pencil hardness of composite coatings could be 6H while the adhesion based on glass could be 1 level. The degree of curing of the coating could be obviously improved by the addition of g-C3N4, leading to a 7 percent increase of the gel content. Additionally, the decomposition of hard segments of polyurethane acrylate could be avoided by the use of g-C3N4 resulting in an increasing stability to heat. We found the gel content in an aerobic environment was lower than that in an anaerobic environment. On this basis, the function and mechanism of g-C3N4 was investigated in detail and methods to eliminate the O2 were proposed.

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Boron containing UV-curable epoxy acrylate coatings

Cited by 25 publications

References 21 publications

Synthesis and characterization of dual-curable epoxyacrylates for polyester cord/rubber applications

Synthesis and characterization of dual-curable epoxyacrylates for polyester cord/rubber applications

A New Sight into Bio-Based Polybenzoxazine: From Tunable Thermal and Mechanical Properties to Excellent Marine Antifouling Performance

Effect of Graphene Carbon Nitride on Ultraviolet-Curing Coatings

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