Effect of pigmentation on polyurethane/polysiloxane hybrid coatings

Gao, Tongzhai; Maya-Visuet, Enrique; He, Zhouying; Castaneda‐Lopez, Homero; Zvonkina, Irina; Soucek, Mark D.

doi:10.1002/app.42947

Cited by 9 publications

(8 citation statements)

References 39 publications

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“…EIS is an established method for the evaluation of the corrosion protection of coatings but can also be used to assess film properties in general . The measurements of the impedance spectra and data analysis were performed with the same procedures as described in our previous article, where we demonstrated that EIS can be used to observe the progress of latex film formation.…”

Section: Resultsmentioning

confidence: 99%

Influence of coalescing aids on the latex properties and film formation of waterborne coatings

Berce

Skale²,

Razboršek

et al. 2017

J of Applied Polymer Sci

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Coalescing aids are organic solvents that are widely used to accommodate the film formation of waterborne coatings. The influence of the volatility, hydrophilicity, and amount of coalescing aids on the properties of waterborne dispersions and the dynamics of film formation was investigated. The results show that coalescing aids increased the viscosity through particle swelling and solvation, with the effect being stronger with more hydrophilic solvents. The results obtained with electrochemical impedance spectroscopy (EIS) and indentation tests show that hydrophilic coalescing aids were more efficient because of the partitioning on the particle interfaces but they could temporarily decrease the water resistance. The ease of coalescence was countered by solvent retention, which complicated the dynamics of film formation. EIS was used to optimize a real‐world coating formulation and identify the pitfalls arising from the complex dynamics of film formation. The best resistance to humidity was obtained with a combination of hydrophobic and hydrophilic coalescing aids. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45142.

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Section: Resultsmentioning

confidence: 99%

Influence of coalescing aids on the latex properties and film formation of waterborne coatings

Berce

Skale²,

Razboršek

et al. 2017

J of Applied Polymer Sci

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“…The burnout results of CERTi8 and 10 samples, which contain P-based compounds, show that, as expected, phosphorus actively contributes to thermal degradation, improving thermal stability [20]; in fact, these samples show the highest residue at 800 °C. Moreover, the contribution of TiO2 NPs should be considered, for their high affinity for Si-based matrix [58] and their capacity to act as physical barrier, promoting the formation of a carbonaceous residue [41] but also for their potential detrimental catalyzing effect, which accelerates the combustions process [59]. Sample CERTi5, which has the lowest amount of TiO2 NPs, showed a very low residue after burn-out, despite the presence of TMEOS precursor.…”

Section: Ceramer Coatingmentioning

confidence: 99%

Insulating Thermal and Water-Resistant Hybrid Coating for Fabrics

Ortelli

Costa

2020

Coatings

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Organic–inorganic hybrid (ceramer) coatings were synthesized and deposited on the polyester nonwoven fabrics through the sol–gel process. This promoted the formation of an insulating barrier that was able to enhance the thermal stability and the hydrophobicity of fabrics. The hybrid phase is made of an organic network arising from different alkoxysilane precursors (trimethoxymethylalkoxysilane (TMEOS), 3-aminopropyl-trimethoxyalkoxysilane (APTMS), and tetraethylorthosilicate (TEOS)) and inorganic phase made of titanium dioxide TiO2 nanoparticles (NPs) and, in some cases, coated by P-based compound. The characterization of hybrid phase at liquid (size distribution and zeta potential of dispersed nanoparticles), dried state (crystalline phase, thermogravimetric (TGA), and Fourier transform infrared spectroscopic (FTIR) analyses), and on deposited coatings (contact angle, burn-out tests) aimed to find a correlation between the physicochemical properties of ceramer and functional performances of coated fabrics (thermal stability and hydrophobicity). The results showed that all ceramer formulations were able to improve the char formation after burn-out, in particular the highest thermal stability was obtained in the presence of TMEOS precursor and TiO2 NPs coated by P-based compound, which also provided the highest hydrophobicity. In conclusion, we presented an environmentally friendly and easily scalable process for the preparation of ceramer formulations capable of being formed into transparent, thermal-resistant, and hydrophobic fabric coatings, whose functions are extremely challenging for the textile market.

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“…In a recent report, polysiloxane, tetraethyl orthosilicate oligomers (TEOS oligomers), formulated into urethane coatings in the presence of TiO 2 resulted in the formation of Si O Ti bonding. 8 The resultant interconnection of TiO 2 and urethane linkage via a silane linkage showed improvement in corrosion resistance and adhesion properties. 8 Incorporation of functionalized organic phase and sol-gel phases can eliminate or control phase separation phenomena during mixing and drying, thereby producing finely dispersed precipitated particles or co-continuous morphology.…”

Section: Introductionmentioning

confidence: 99%

Toughening of silane modified bis‐phenol‐A epoxides

Joo

Miyoshi

Kyu

et al. 2022

J of Applied Polymer Sci

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The fracture toughness of two alkoxysilane modified bis-phenol-A (BPA) epoxides were compared at three different temperatures. Organosilanes were utilized to synthesize the modified epoxides; 3-aminopropyl triethoxysilane reacted with the telechelic oxirane (aminosilane functionalized epoxide, ASE); and 3-(triethoxysilyl) propyl isocyanate reacted with the secondary hydroxyl group of the repeat unit (isocyanatesilane functionalized epoxide, ISE). Prehydrolyzed and condensed tetraethyl orthosilicate (TEOS oligomers) and TiO 2 were added to modified epoxides along with an amine hardener. The films were evaluated using DSC, TGA, tensile, and fracture toughness. During film formation, there were two competing chemical pathways: one based on in situ inorganic reactions of silanes and silicates, and the other based on organic reaction of amine crosslinker with epoxide groups. The aminosilane modified epoxides (ASE) indicated higher compatibility with TEOS oligomers or TEOS oligomers/TiO 2 than the isocyanate-silane modified epoxides as smaller agglomerates observed with AFM and SEM images. Theses interactions made ASE tougher, as there was an improvement in the fracture toughness, tensile modulus, and impact strength. This study found that the toughness varied at different temperatures (À50, 20, and 60 C).

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Effect of pigmentation on polyurethane/polysiloxane hybrid coatings

Cited by 9 publications

References 39 publications

Influence of coalescing aids on the latex properties and film formation of waterborne coatings

Influence of coalescing aids on the latex properties and film formation of waterborne coatings

Insulating Thermal and Water-Resistant Hybrid Coating for Fabrics

Toughening of silane modified bis‐phenol‐A epoxides

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