Synthesis and properties of self-crosslinking waterborne polyurethane with side chain for water-based varnish

Zhong, Linhao; Zhu, Jiantao; Li, Fuqiang; Wu, Zhimin; Liu, Yuejin; Xiong, Di

doi:10.1016/j.porgcoat.2020.105972

Cited by 25 publications

(21 citation statements)

References 40 publications

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“…Crosslinking WPUs containing siloxane bonding, for example, have shown a reinforcement effect on thermal and surface properties of UV-WPU systems [175,176]. Combining these approaches has shown to be an efficient technology for improving the performance of WPU systems [177]. UV-curable WPU materials are currently applied as antibacterial, antistatic, flame retardant, and antifog coatings to protect or beautify the wood, plastic, metal, and paper surface through the appropriate selection of nanoparticles, additives, monomers, chain extenders, reactive diluents, among others.…”

Section: Discussionmentioning

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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Section: Discussionmentioning

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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“…Therefore, it can be concluded that the introduction of IHA crosslinking agent into WPU can greatly improve the adhesion and pencil hardness of the coating, which is better than the Si O Si crosslinking structure formed by side chain. 60 The results mean that IHA has the potential to be used as a protective coating to protect the surface of the board. The comprehensive performance comparison of WPU-IHA-x coatings can be seen in Table S3.…”

Section: Adhesion and Pencil Hardnessmentioning

confidence: 98%

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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“…Due to the larger proportion and the inertness of inorganic sections, the modication strategies including achieving post crosslinking and improving the adhesion with inorganic matrix materials were taken into account. [20][21][22] As a result, KH570 and GMA were chosen as functional monomers to achieve the purpose. The synthetic route of WPAs is illustrated in Scheme 2.…”

Section: Design Principle Of Wpasmentioning

confidence: 99%

Preparation and properties of water-based acrylic emulsion-assisted flexible building tiles

Zhang

Bai²,

Zhou

et al. 2022

RSC Adv.

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Synthesis and properties of self-crosslinking waterborne polyurethane with side chain for water-based varnish

Cited by 25 publications

References 40 publications

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

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

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

Preparation and properties of water-based acrylic emulsion-assisted flexible building tiles

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