Self-stratifying epoxy/silicone coatings

Beaugendre, A; Degoutin, Stéphanie; Bellayer, Séverine; Pierlot, Christel; Duquesne, Sophie; Casetta, Mathilde; Jimenez, Maude

doi:10.1016/j.porgcoat.2016.10.025

Cited by 27 publications

(13 citation statements)

References 14 publications

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“…On the basis of previous results [16], two commercial resins and a curing agent were selected, respectively: an epoxy (Bisphenol-A epoxide from Sigma-Aldrich, St. Louis, MO, USA, equivalent weight: 172-176, 100% solids), a silicone (a phenyl branched resin containing 6% of hydroxyl group from Dow Corning, Seneffe, Belgium) and a polyamine (diethylene triamine (99%), Sigma-Aldrich).…”

Section: Methodsmentioning

confidence: 99%

“…In this work, film forming compositions based on a partially incompatible polymer blend, including a curable epoxy resin and a silicone resin in combination with a phosphorous-based liquid fire retardant filler are considered [16]. Two liquid fire retardant additives were tested: bisphenol-Abis(diphenyl phosphate) (BDP) and resorcinol bis(diphenyl phosphate) (RDP).…”

Section: Introductionmentioning

confidence: 99%

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Self-Stratification of Ternary Systems Including a Flame Retardant Liquid Additive

et al. 2018

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Particular coating compositions based on incompatible polymer blends can produce coatings having complex layered structures after film formation. The most traditional approaches to their structural modification are the introduction of additives (extenders, inorganic pigments, surface active agents, etc.). As minor additives, some are capable of substantially accelerating the phase separation process with a moderate or negligible influence on the composition equilibrium of solutions. In contrast, in order to be effective, some have to be introduced in significant amounts, thereby substantially changing the resulting distribution of components through the film. Up to now, most of the liquid additives that have been tested destabilized the solutions while impacting the layering process. In this work, two phosphorus based liquid fillers have been introduced (at 2.5 and 5 wt.%) in a partially incompatible polymer blend based on a silicone resin and a curable epoxy resin to fire retard a polycarbonate matrix. Self-stratification was evidenced by microscopic and chemical analyses, flammability by Limiting Oxygen Index (LOI) and UL-94 tests, fire performances by Mass Loss Calorimetry and thermal stability by using a tubular furnace and ThermoGravimetric Analysis. The ternary compositions including 5 wt.% of additives exhibit the best stratification and excellent adhesion onto polycarbonate. Improvements of the fire resistant properties were observed (+7% for the LOI compared to the virgin matrix) when a 200 µm wet thick coating was applied, due to reduced flame propagation and dripping.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Self-Stratification of Ternary Systems Including a Flame Retardant Liquid Additive

et al. 2018

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“…Figure 7 shows the fracture morphology of the coating ES-50 by CLSM. Due to the poor compatibility between PDMS and E51 and the surface free energy of silicone resins being less than that of epoxy resins, delamination occurs after the paint is applied [29]. Therefore, it can be observed in the image that the fracture morphology of the upper area of the ES-50 tensile specimen (Figure 7a) has a relatively uneven fracture morphology compared to the fracture morphology of the lower area, which deforms along the stretching direction to form the morphology of convex or concave (e.g., area marked with rectangle).…”

Section: Morphology and Microstructurementioning

confidence: 99%

Influence of Epoxy Content on the Properties and Marine Bacterial Adhesion of Epoxy Modified Silicone Coatings

Zhao

Zhang

2020

Coatings

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This study addresses the issue of enhancing the mechanical properties and adhesion of silicone antifouling coatings. In this paper, γ-aminopropyltriethoxysilane was used to pretreat bisphenol A epoxy resin to obtain epoxy-silicone prepolymer, which was then mixed with hydroxyl-terminated polydimethylsiloxane to obtain epoxy-modified silicone. It was cured with polyamide curing agent and dibutyltin dilaurate catalyst to form film, and a three-component epoxy-modified silicone coating was prepared. Fourier transform infrared (FTIR) spectroscopy was used to characterize its chemical structure. The effects of epoxy content on the surface properties, mechanical properties and antibacterial properties of the coatings were characterized by confocal laser scanning microscope (CLSM), contact angle measurements, tensile test and bacterial adhesion test. The results show that adding epoxy makes the adhesion of the coating at level 1 and the surface free energy of the coating was between 15–21 mJ/m2. When its content is less than 22.1 wt %, the coating is in a ductile material state. Once it is higher than 22.1 wt %, the coating was in a brittle material state. As the content increases, material’s hardness and fracture strength increases; elastic modulus decreases first and then increases, but bacteria removal rate decreases. The modification of the epoxy to silicone can effectively improve the adhesion and mechanical properties of the coating, while maintaining the characteristics of the low surface of the coating. It plays a positive role in improving the performance of silicone antifouling coatings.

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“…Indeed, previous studies demonstrated that crosslinking reactions can favor the incompatibility between two resin systems, thus resulting in a higher stratication degree, when curing reaction precedes the layering process or when the two phenomena overlap. 5,6,29,30 Consequently, aer the application of the formulation, the coating was dried at ambient temperature for 24 hours and cured for 2 hours at 110 C in an oven.…”

Section: Coatingsmentioning

confidence: 99%

One pot flame retardant and weathering resistant coatings for plastics: a novel approach

et al. 2017

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Self-stratifying epoxy/silicone coatings

Cited by 27 publications

References 14 publications

Self-Stratification of Ternary Systems Including a Flame Retardant Liquid Additive

Self-Stratification of Ternary Systems Including a Flame Retardant Liquid Additive

Influence of Epoxy Content on the Properties and Marine Bacterial Adhesion of Epoxy Modified Silicone Coatings

One pot flame retardant and weathering resistant coatings for plastics: a novel approach

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