Preparation and characteristics of crosslinked fluorinated acrylate modified waterborne polyurethane for metal protection coating

Performance testing of modified waterborne polyurethane coating applied on laminated bamboo

“…In tests at 24 h and 48 h, the ASEL of the specimens in group 8 was the best, reaching 82.76% and 77.27%, respectively. The reason may be that the APP in the flame retardant was insoluble in water, and a hydrophobic film was formed on the surface of the substrate, which also made it resistant to water intrusion (Wang et al 2021;Wu et al 2021). The specimens in group 8 performed was best at 24 h and 48 h, the MA rate was good, and the MEE was the best among the test materials.…”

Enhanced Anticorrosion Properties through Structured Particle Design of Waterborne Epoxy-Styrene-Acrylate Composite Emulsion

“…These results show that, compared to the conventional core-shell coating, the three-layer core-shell coating can provide better protection against corrosion. This is ascribed to the crosslinking network established between the core and shell during film formation and the incorporation of the set interlayer, making it difficult for the corrosive medium to penetrate the coating in order to initiate corrosion on the metal substrate [32]. The corrosion behaviors of different coatings immersed in 3.5 wt.% NaCl solution at different time periods were monitored by EIS tests using an electrochemical workstation.…”

“…In this stage, both coatings act as a physical barrier exhibiting an excellent anti-corrosion ability. Model B is suitable for the simulation of the coating/metal interface at the middle corrosion period when there is a uniform penetration of the electrolyte solution through the coating, as well as an even distribution of corrosion sites [32]. Model C was used to stimulate the medium corrosion stage after 3 days of immersion of the one with the three-layer core-shell coating.…”

“…However, it is hard to achieve a satisfactory dispersity and compatibility between the inorganic phase and polymer. It was demonstrated that enabling self-crosslinking through a structured particle design is a workable way to enhance the anticorrosion properties of waterborne epoxy acrylate composites [31][32][33].…”

Robust Catechol Containing Cationic Waterborne Polyurethanes with Antibacterial, UV Protective, and Adhesive Properties

“…Gong et al [13] found that the CWPUs have better emulsification properties with tertiary amines in the side chain and terminus compared to those in the backbone. Further, to satisfy highly diverse application demands, various approaches like increasing the rigid ring structure, [14] adding nanofillers, [15,16] and grafting reactive polar group [17] like epoxide groups [18] were researched to enhance the degree of crosslinking and mechanical properties of CWPUs. [19] Nevertheless, the traditional modification methods are problematic for a few important reasons: i) The introduction of a rigid ring structure in the polyurethane molecules increases the material's brittleness and reduces its toughness, which creates the inevitable trade-off between fracture strength and ductility; ii) The physical-filling method for enhancing mechanical properties brings about poor filler dispersion and interface incompatible with the matrix; iii) The crosslinking structure design process is very complex and it is difficult to achieve excellent mechanical properties and functional properties simultaneously via a single modification method.…”