Preparation and properties of nonionic waterborne epoxy resin

Wang, Kaijie; Li, Yuanyuan; Sang, Shilin; Zhang, Shijie; Chen, Lilin; Jia-ling, Tang

doi:10.1002/app.51655

Cited by 5 publications

(9 citation statements)

References 28 publications

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“…39 In this regard, the emulsification temperature of emulsifiers must be lower than their CP values to prevent phase separation. 19 The increased CP values of all WEP emulsifiers with increasing PEG molecular weights indicate that high contents of polyoxyethylene chains in PEG provide high affinity to H 2 O, thus maintaining the WEP emulsifier stability over a broad temperature range (Figure 2d). 40 The high CP value of E-PEG4000 (81.7 °C) from the other side indicates that this emulsifier can be used over a broad temperature range.…”

Section: Resultsmentioning

confidence: 97%

Nonionic Emulsifier with Lipophilic–Hydrophilic–Lipophilic Structure for Preparing Waterborne Epoxy Coatings with High Corrosion Resistance and Thermal Stability

Zhang,

Li,

Pei

et al. 2024

Ind. Eng. Chem. Res.

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Although the environmentally friendly waterborne epoxy (WEP) coatings exhibit high adhesion to substrates, the abundant hydrophilic groups in those coatings always bring about poor anticorrosion performance. Herein, a nonionic WEP emulsifier with the lipophilic–hydrophilic–lipophilic (L-H-L) structure has been successfully prepared to enhance the anticorrosion performance of the WEP coating. After the hydrophilic chains formed between polyethylene glycol (PEG) and hexahydrophthalic anhydride (HHPA) are terminated by epoxy resin (E51), the WEP emulsifier with the L-H-L structure can be obtained, which is then used for preparing the WEP emulsion with regular shape, small particle size, uniform distribution, and high stability by the phase inversion method. The WEP coatings of uniform thickness (110 ± 15 μm) without anticorrosion fillers can be prepared by spraying. The results of electrochemical impedance spectroscopy (EIS) show that the WEP-PEG2000-10% coating exhibits high anticorrosion performance with the low-frequency impedance value as high as 7.47 × 109 ohm·cm2 after being immersed in 3.5 wt % NaCl solution for 60 days. Actually, the L-H-L structure effectively reduces the free hydrophilic groups in the WEP coating, thus significantly improving the anticorrosion performance. This study provides new insight on developing novel inherent WEP coating with high anticorrosion performance.

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Section: Resultsmentioning

confidence: 97%

Nonionic Emulsifier with Lipophilic–Hydrophilic–Lipophilic Structure for Preparing Waterborne Epoxy Coatings with High Corrosion Resistance and Thermal Stability

Zhang,

Li,

Pei

et al. 2024

Ind. Eng. Chem. Res.

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“…Epoxy resin is a kind of polymers whose main chains are constructed by the aliphatic and/or aromatic chain segments, in which the molecule contains two or more epoxy groups 1–3 . Benefiting from strong adhesion, stability, good chemical resistance and other excellent characteristics, epoxy resin has been widely used to prepare coatings 4–6 . Epoxy‐based coatings can be applied in different fields, including automobiles, 7 containers, 8 equipment, 9 civil engineering, 10 ships, 11 electronic components, 12 and so forth.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3] Benefiting from strong adhesion, stability, good chemical resistance and other excellent characteristics, epoxy resin has been widely used to prepare coatings. [4][5][6] Epoxybased coatings can be applied in different fields, including automobiles, 7 containers, 8 equipment, 9 civil engineering, 10 ships, 11 electronic components, 12 and so forth.…”

Section: Introductionmentioning

confidence: 99%

Anti‐corrosion improvement of epoxy coating by the synergistic effect of barrier shielding and slow‐release based on phytic acid intercalated hydrotalcite

Ju,

Wang,

et al. 2023

J of Applied Polymer Sci

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Epoxy resin has been widely applied in coating preparation, due to its excellent properties. The anti‐corrosion performance improvement of epoxy‐based coatings has attracted much attention. The synergistic effect of the barrier function of two‐dimensional fillers and the slow release of inhibiter has been proven to be an effective way to improve the anti‐corrosion of coatings. In this work, the phytic acid (PA) intercalated hydrotalcite (HT) was fabricated by a one‐pot method. First, HT was synthesized by magnesium nitrate hexahydrate (Mg(NO3)2·6H2O) and aluminum nitrate nonahydrate (Al(NO3)3·9H2O) in the water solution. Subsequently, PA was added to the dispersion to obtain PA intercalated HT fillers (PA‐HT). The obtained PA‐HT fillers were incorporated into the epoxy resin (EP) to prepare the anti‐corrosion coating (PA‐HT/EP). The prepared PA‐HT/EP coating exhibits excellent anti‐corrosion properties at 1 wt% filler loading that the impedance modulus maintains above 109 Ω cm2 after 30 days of soaking in 3.5 wt% NaCl solution. Moreover, the anti‐corrosion mechanism of the synergy of the physical barrier of two‐dimensional fillers and the release slow of inhibitors was thoroughly discussed, particularly the formation and anti‐corrosion mechanism of the passivation protection film constituted by PA.

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“…Commercial toughening agents include chlorinated polyethylene (CPE), core‐shell structure acrylic impact modifier (ACR), and so forth, which have been extensively reported in the literature 11–15 . In previous works, 16,17 polycarbonate‐polydimethylsiloxane block copolymer (PC‐ b ‐PDMS) was used as a new toughening agent to toughen PVC and its comparison with other toughening agents was investigated. It was found that PC‐ b ‐PDMS has a good toughening effect on PVC, and the toughness can be increased up to 42 times (Izod notch impact strength 117.38 kJ/m 2 ) at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Effect of polycarbonate‐polydimethylsiloxane block copolymer and two commercial toughening agents on the flame retardancy and smoke emission of rigid polyvinyl chloride

Wang

Zhang

Xu³

et al. 2023

Journal of Polymer Science

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In this work, different test methods were used to investigate the flame retardancy and smoke emission of polyvinyl chloride (PVC) toughened with polycarbonate‐polydimethylsiloxane block copolymer (PC‐b‐PDMS) and two other commercial toughening agents. The oxygen index result and heat release curves in the cone calorimetry test showed that toughened PVC has reduced flame retardancy compared to unmodified PVC. However, the vertical combustion test showed that all samples have achieved the highest flame retardant rating, indicating that the flame resistance of these toughened PVC is still adequate for use. In terms of smoke emission, the results of the cone calorimetry test and the smoke density test showed a significant difference. In the smoke density test, it was found that PVC toughened with PC‐b‐PDMS has less smoke generation in the early stage of combustion. In the cone calorimetry test, the total smoke production was lower for PVC and significantly higher for toughened PVC. This difference was mainly due to the different test conditions of these two tests.

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Preparation and properties of nonionic waterborne epoxy resin

Cited by 5 publications

References 28 publications

Nonionic Emulsifier with Lipophilic–Hydrophilic–Lipophilic Structure for Preparing Waterborne Epoxy Coatings with High Corrosion Resistance and Thermal Stability

Nonionic Emulsifier with Lipophilic–Hydrophilic–Lipophilic Structure for Preparing Waterborne Epoxy Coatings with High Corrosion Resistance and Thermal Stability

Anti‐corrosion improvement of epoxy coating by the synergistic effect of barrier shielding and slow‐release based on phytic acid intercalated hydrotalcite

Effect of polycarbonate‐polydimethylsiloxane block copolymer and two commercial toughening agents on the flame retardancy and smoke emission of rigid polyvinyl chloride

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