Research progress of UV-curable polyurethane acrylate-based hardening coatings

Fu, Junchao; Wang, Li; Haroon, Muhammad; Haq, Fazal; Wen-lei, Shi; Wu, Bin; Wang, Libo

doi:10.1016/j.porgcoat.2019.01.061

Cited by 83 publications

(53 citation statements)

References 101 publications

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“…The influence of various sulf-PUs (In Table 2) was investigated and the results were collected in Table 4. It can be seen that the pencil hardness of the coatings is the highest when the coating is prepared with sulf-PU-4 and the pencil hardness of all the coatings prepared is in the range of 5B-HB, which is similar to those UV-cured polyurethane coatings reported previously [24][25][26]. The surface water contact angle is still not very high, which is in the range of 88.5-102.2° ( Figure S5).…”

Section: The Influence Of Various Sulf-pussupporting

confidence: 78%

UV-Cured Coatings Prepared with Sulfhydryl-Terminated Branched Polyurethane and Allyl-Terminated Hyperbranched Polycarbosilane

Jiao

Zhang²,

Cheng

et al. 2020

Coatings

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The conventional polyurethane (PU) coatings have poor heat resistance, which will undergo severe pyrolysis when the temperature exceeds 200 °C. To overcome the shortcoming of conventional PU coatings, an ultraviolet (UV)-cured solvent-free hyperbranched polycarbosilane modified PU coatings was prepared by sulfhydryl-terminated polyurethane and allyl-terminated hyperbranched polycarbosilane. The initial decomposition temperature (Td5%) of the UV-cured coating ranges from 258 to 268 °C, which is obviously higher than those of the conventional PU coatings reported. The coating shows fairly low water absorption in the range of 0.6–1.36 wt% and exhibits grade 1, grade 2 and grade 3 adhesion to glass, tin plate and aluminum sheet, respectively.

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Section: The Influence Of Various Sulf-pussupporting

confidence: 78%

UV-Cured Coatings Prepared with Sulfhydryl-Terminated Branched Polyurethane and Allyl-Terminated Hyperbranched Polycarbosilane

Jiao

Zhang²,

Cheng

et al. 2020

Coatings

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“…In addition, the density of photosensitive groups of the existing photo-curable resins can influence the film's performance. Depending on the content of these groups in the polymeric matrix, the hardness of the coating films can be poor, and the UV curing rate may be slow, which limits its practical applications in some fields [25].…”

Section: Introductionmentioning

confidence: 99%

“…So far, there was insufficient data reported in the literature on the correlation between polymeric structure, water-resistance, and coating performance for UV-curable WPU systems [25,36]. Therefore, this review aimed to synthesize and discuss the information found in articles published in the Scopus, Web of Science, Science Direct, and Google Scholar databases from 2000 to 2020.…”

Section: Introductionmentioning

confidence: 99%

UV-curable waterborne polyurethane coatings: A state-of-the-art and recent advances review

Agnol

Dias

Ornaghi

et al. 2021

Progress in Organic Coatings

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Waterborne polyurethane coatings prepared by UV-induced photoreactions (UV-WPU) are becoming very attractive due to the increasingly stringent environmental demands. They were developed to replace solventbased polyurethanes in the coatings of wood, paper, plastics, metal, and glass, mainly because of their good physicochemical, rheological, and optical properties. Several UV-WPU formulations have been tested over the years, making their research substantial. However, no valuable review of this literature, focusing on the significant influencing factors in UV-WPU's manufacture, is available to date. This work aims to answer specific questions about the state of these materials' art, such as: "which monomers have been used most in UV-WPU synthesis?", "what type of photo-initiator has promoted the most efficient curing of the material?", "what additives or particles have been tested for composite UV-WPUs?", "which applications have UV-WPUs been directed to?", "what adaptations and technologies have already been tested to overcome the challenges of the process?", among others. As a result of a systematized bibliographic search in four databases, considering the period from January 2000 to July 2020, a total of one hundred and thirty-eight distinct and relevant articles on UV-WPUs were found. From this study, we hope to present a scientific source on the current state-of-the-art of UV-WPU synthesis, providing new combinations of raw materials and intelligent solutions, thus making material and industrial engineers able to mitigate the inconveniences of the process.

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“…The reason for this phenomenon is not clear at the moment, but it has been speculated to be closely related to the mechanical properties (such as compactness) of the hybrid film. The UV-cured coatings usually possess high crosslinking density and hardness when compared to traditional coatings that are prepared from conventional thermal curing technique [28], especially when multifunctional monomers are involved, which may hinder the mobility of the fluoroalkyl chains. It is well known that roughness enhances the intrinsic hydrophobicity of a coating.…”

Section: Sustainability Of the Surface Hydrophobicity Of The Hybrid Fmentioning

confidence: 99%

Preparation of UV-Curable Low Surface Energy Polyurethane Acrylate/Fluorinated Siloxane Resin Hybrid Coating with Enhanced Surface and Abrasion Resistance Properties

et al. 2020

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Low surface energy coatings have gained considerable attention due to their superior surface hydrophobic properties. However, their abrasion resistance and sustainability of surface hydrophobicity are still not very satisfactory and need to be improved. In this work, a series of utraviolet (UV)-curable fluorosiloxane copolymers were synthesized and used as reactive additives to prepare polyurethane acrylate coatings with low surface energy. The effect of the addition of the fluorinated graft copolymers on the mechanical durability and surface hydrophobicity of the UV-cured hybrid films during the friction-annealing treatment cycles was investigated. The results show that introducing fluorosiloxane additives can greatly enhance surface hydrophobicity of the hybrid film. With addition of 2 wt.% fluorosiloxane copolymers, the water contact angle (WCA) value of the hybrid film was almost tripled compared to that of the pristine PU film, increasing from 58 • to 144 • . The hybrid film also showed enhanced abrasion resistance and could withstand up to about 60 times of friction under a pressure of 20 kPa. The microstructure formed in the annealed film was found to contribute much to achieve better surface hydrophobicity. The polyurethane acrylate/fluorinated siloxane resin hybrid film prepared in this study exhibits excellent potential for applications in the low surface energy field.Especially, some pioneering studies demonstrated that the robust and self-healing ability of the fluorinated materials contribute significantly to the performance of superhydrophobic coatings. For example, Lin et al. [15] prepared superhydrophobic fabrics under 12 KPa and 28,000 cycles of abrasion with wool felt by using a fluoroalkyl silane and crosslinked polydimethylsiloxane (PDMS). Their results showed that the water contact angle of the fabrics remained above 150 • , indicating that the superhydrophobic surface character was retained. They also utilized fluorinated-decyl polyhedral oligomeric silsesquioxane (FD-POSS) and hydrolyzed fluorinated alkyl silane (FAS) to prepare superhydrophobic fabrics, which still exhibited superhydrophobic surface even under ten plasma-and-heat cycles [16]. Zhang et al. [17] combined thiol-ene fluorinated siloxane (T-FAS) and hydrophobic fumed silica nanoparticles to prepare superhydrophobic coatings that could withstand approximately 100 abrasion cycles at 45 KPa [18]. It should be noted that, in these examples, the materials were surface-modified materials rather than pure fluoropolymers.Incorporation of fluorinated groups into acrylate copolymers could bring several desirable properties to the polyacrylate coatings. Depending on their chain length, the contribution of the introduced fluoroalkyl-containing moieties to the material surface properties can be tailored. If the molecular chain of the moieties are too short, they may be buried within the polymer matrix, thus mitigating their contribution [19]. In this aspect, Koji Honda et al. [9] studied the effects of side chain length on the molecular ag...

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Research progress of UV-curable polyurethane acrylate-based hardening coatings

Cited by 83 publications

References 101 publications

UV-Cured Coatings Prepared with Sulfhydryl-Terminated Branched Polyurethane and Allyl-Terminated Hyperbranched Polycarbosilane

UV-Cured Coatings Prepared with Sulfhydryl-Terminated Branched Polyurethane and Allyl-Terminated Hyperbranched Polycarbosilane

UV-curable waterborne polyurethane coatings: A state-of-the-art and recent advances review

Preparation of UV-Curable Low Surface Energy Polyurethane Acrylate/Fluorinated Siloxane Resin Hybrid Coating with Enhanced Surface and Abrasion Resistance Properties

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