Characterizing and improving performance properties of thin solid films produced by weatherable water-borne colloidal suspensions on bronze substrates

Characterization of High Performance Protective Coatings for Use on Culturally Significant Works

“…Increasing the adhesion of the topcoat might be achieved by the incorporation of monomers known to interact with metals, such as ureido methacrylate, 21 or through modification of the resin to reduce its minimum film formation temperature (MFFT). 23 In our previous work we determined that annealing of Kynar Aquatec® RC-10206 by an infrared heating lamp for 4 h reduced the whitening from 25% to 5%, which is comparable to controls of visually transparent sprayed films (where 0% is completely transparent and 100% is white). An additional complication of the use of waterborne coatings comes from the differences in the mechanism of film formation from a latex suspension, which is considerably more complex and prone to film defects than the same process from solvent-based polymeric coatings.…”

“…In our previous work we have shown that the barrier properties of the waterborne PVDF resin improved after exposure to QUV-B weathering cycles, due to the annealing effects of those cycles, 23 and we again investigated that effect for the nanocomposite films. Shown in Figure 19.12a and b are EIS spectra of films with the fluorinated nanoclay, Lap-FOTES + PC, incorporated into Kynar Aquatec FMA 12 as a topcoat with a solvent-based Paraloid™ B-44 primer on bronze before Figure 19.12 EIS spectra of films of Kynar Aquatec® FMA 12 with Lap-FOTES + PC incorporated on Paraloid™ B-44 primed bronze substrates.…”

Nonionic surfactant-stabilized raspberry-like polymer/silica nanoparticles latex with film formability

“…As mentioned above, for water-borne coating application, the pre-coating latexes should present some hydrophilicity to maintain their sufficient colloidal stability [2], which on the other hand may increase the water uptake ability of the WBC film. The water absorption behaviors of the latex films were investigated as a function of the nanosilica and BA content.…”

“…Concerning the coatings industry of a huge market, unlike the solvent based coatings (SBC), waterborne coatings (WBC) may offer a most practical and effective solution to the anti-pollution age, since the latter is involved in a lower content of volatile organic compounds (VOC) [2]. Generally, WBC film should be hydrophobic and robust to resist water sorption and internal/external stresses, and at the same time WBC pre-coatings which normally assume as water-borne suspensions should present some hydrophilicity to maintain their sufficient colloidal stability [2][3][4].…”

“…Concerning the coatings industry of a huge market, unlike the solvent based coatings (SBC), waterborne coatings (WBC) may offer a most practical and effective solution to the anti-pollution age, since the latter is involved in a lower content of volatile organic compounds (VOC) [2]. Generally, WBC film should be hydrophobic and robust to resist water sorption and internal/external stresses, and at the same time WBC pre-coatings which normally assume as water-borne suspensions should present some hydrophilicity to maintain their sufficient colloidal stability [2][3][4]. However, compared to traditional SBC, the motivation by the decreased cost and environmental safety of WBC is generally at the expense of their protective barrier properties, such as film formability, mechanical properties (hardness), gloss, scratch and/or water resistance, etc [5].…”