Pigment & Resin Technology
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2023
·Vol. 53
·期 5
·650-658
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IF 1.4
Fuping Bian,Shudong Lin
PurposeThis paper aims to investigate the effects on coatings performance in the epoxy silicone resin system owing to the existence of the different chain length of open-chain epoxy monomer. In this paper, [4-Methylphenyl-(4–(2-methylpropyl) phenyl)]iodonium as photoinitiator was added into epoxy silicone resin by ultraviolet (UV)-cured polymerization to investigate the effects on coatings performance owing to the existence of the different chain length of open-chain epoxy monomer.Design/methodology/approachA simple hydrosilylation reaction was used to synthesize epoxy-based silicone prepolymers by using hydrogen-terminated polydimethylsiloxane, 1,2-epoxy-5-hexene, 1,2-epoxy-7-octene and 1,2-epoxy-9-decene as precursors.FindingsThe results revealed that the glass transition temperatures (Tg) and hydrophobicity increased with the chain length of open-chain epoxy monomer in the UV curable epoxy-based silicone coatings, and these films had excellent heat resistance, hydrophobicity, antigraffiti and ink removal properties.Research limitations/implicationsThe cationic photocuring systems are not susceptible to the effect of oxygen inhibition. However, the limitation of cationic light curing process is that it requires a long curing time.Originality/valueThe coatings prepared via the UV curing approach can provide superior antismudge effects, and thus they are promising candidates for use in various industries, especially in fields such as antismudge coatings and antigraffiti coatings.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
Journal of Coatings Technology and Research
·
2013
·Vol. 10
·期 6
·775-784
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IF 1.094
Liu Hu,Gao Lijing,Shang Qianqian,Xiao Guomin
A type of antigraffiti polyurethane clearcoat was prepared and characterized. Polymethylsiloxane grafted by fluorocarbon side chains (PSF) was first synthesized through hydrosilylation of polymethylhydrosiloxane with dodecafluoroheptyl acrylate. Hydroxyl fluoroacrylate resins with different hydroxyl contents were synthesized via free radical-initiated solution polymerization and further applied to prepare polyurethane clearcoats. The synthesized polymers were structurally characterized by using Fourier transform infrared and 1 H nuclear magnetic resonance. The prepared polyurethane clearcoats underwent contact angle measurement, dynamic thermal mechanical analysis, nanoscratch experiments, and atomic force microscopy. The results reveal that low surface energy, high crosslink density, low coefficient of friction, and low roughness were jointly beneficial to antigraffiti properties. Antigraffiti testing was carried out on the clearcoat with 8.0 wt% PSF and 2.0 wt% active silicone fluid, and this clearcoat showed high resistance to acrylic spray paint, permanent markers, and other graffiti materials.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 19
·e53832
·
IF 3
Lei Yang,Yuese Chen,Ting Zhang,Heqing Fu
In this work, the CO 0.5 Ni 0.5 Fe 2 O 4 nanoparticles modified by phosphoric acid and NCO groups were prepared as flame-retardants and cross-linking centers. After modification, the dispersibility and flame-retardant properties of the nanoparticles were effectively improved. On this basis, a kind of two-component polyester-based anti-smudge and flame retardant hybrid coating in situ polymerization was prepared by using dihydroxy mono-terminated PDMS to provide low surface energy, dipentaerythritol (Di-PE) as a charring agent to provide sufficient cross-linking sites. Water, ink, pump oil, and cooking oil could slide off the coated surface without leaving any traces. These novel hybrid coatings exhibit excellent anti-graffiti properties and corrosion resistance even with 2 wt% PDMS and 3 wt% modified nanoparticles content. Moreover, Si, P, and CO 0.5 Ni 0.5 Fe 2 O 4 all resulted in the formation of a char protective layer during burning. The thermal properties and flame retardant properties of the hybrid coatings were significantly improved. The peak heat release rate (PHRR) curves and the smoke production rate (PSPR) of hybrid coatings (3 wt% modified CO 0.5 Ni 0.5 Fe 2 O 4 ) decreased by 44.2%, 55.7%, respectively, compared with pure composites. Besides, the hybrid coatings can be applied to a variety of substrates, including glass, steel, and fabric.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
·
2025
·
IF 3.5
Jiaxing Zhang,Zhao Zhang,Hui Chang,Yangyi Chen
In this paper, a UV-curable solvent-free biomass polyurethane acrylic material was prepared by a two-step method, including the synthesis of cardanol-based polymerizable monomer and cardanol-based resins. This resin could form excellent self-cleaning and anti-fingerprint coatings after suffering from UV curing. It was found that the cardanol alkyl chain broke the hydrogen-fluorine (H⋅⋅⋅F) bond between the F atom of perfluoroalkyl acrylate and H-N of polyurethane in the coating. And cardanol alkyl chain synergistically induced the directional arrangement of F atoms to the surface, which improved the hydrophobic properties of the coating. This coating has good resistance to common pollutants such as water, ethanol, milk, coffee, dust, and fingerprints, and is suitable for various substrates such as sheet iron, and PET sheet. Due to the high degree of crosslinking in the coating, it can effectively prevent the penetration of acidic and alkaline substances, maintaining good self-cleaning performance even after immersion in a solution of strong acids or alkalis (pH 1–13) for 72 h. The use of cardanol-induced coating fluorine atom surface rearrangement technology can significantly reduce the amount of fluorine and also provide new ideas for the design of self-cleaning and anti-graffiti materials.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Coatings Technology and Research
·
2012
·Vol. 10
·期 3
·361-369
·
IF 1.121
Liu Hu,Fu Baosong,Li Yi,Shang Qianqian,Xiao Guomin
The novel polymethylsiloxane grafted by fluorocarbon side chains was synthesized via hydrosilylation reaction of polymethylhydrosiloxane (PMHS) with 2,2,3,4,4,4-hexafluorobutyl acrylate (HFBA) in the presence of Karstedt’s catalyst. The reaction factors of reaction temperature, reaction time, catalyst dosage, solvent dosage, and molar ratio of the reactants were investigated through orthogonal experiments. Under optimal conditions, the grafting ratio of HFBA to PMHS reached 91.6%. The structure of the grafted polymer was characterized by FTIR and 1 H NMR spectra. The synthesized polymer was incorporated into two-component polyurethane coating formulations as an additive to prepare antigraffiti coatings. After curing, the contact angle measurement was performed and the results showed that surface free energy of the coating film decreased dramatically from 30.7 to 21.4 mJ/m 2 . The inks of permanent markers cannot spread readily on the coating film and can be removed easily, indicating that the incorporation of the synthesized polymer endowed the coating with admirable antigraffiti performance. XPS analysis revealed that atomic concentrations of silicon and fluorine near the surface (about 10 nm) were much higher than deeper within the film (about 100 nm), suggesting that these two elements had a strong migration tendency toward the coating–air interface. AFM measurement showed that the inclusion of synthesized polymer in coating did not affect the surface roughness of the film.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Junhua Chen,Qiuping Ke,Shiting Li,Xuan Wang,Zhihao Zeng,Can Liu,Ruli Mo,Pran Gopal Karmaker,Zhihui Xie,Qiwen Yong
In this study, a UV-curable anti-smudge cathodic electrophoretic coating was developed by free radical copolymerization of various acrylic monomers using heptadecafluorodecyl acrylate (FOEA) as a functional monomer to provide a low surface energy structure to the acrylate precursor. The precursor was then grafted with the synthetic double-bond terminated IPDI-HEA on the precursor, and finally dipentaerythritol penta/hexaacrylate (5-Acl) was introduced as a crosslinker for the subsequent cathodic electrophoresis and UV-curing process. The chemical structure and surface fluorine content of the fluorinated waterborne polyacrylate (FWPA) were confirmed by 1 H NMR, FT-IR, and XPS , respectively. The surface morphology and roughness of the coating were assessed using SEM and AFM instruments. The contact and sliding angles of water, diiodomethane, and hexadecane were determined. The self-cleaning capability was demonstrated by measuring the oil-based and aqueous epoxy paints, as well as carbon powder sliding on the coated tinplate surface. The anti-graffiti property was also integrated with a red marker. The resistance to strong acid, salt spray, impact, friction, and bending were characterized. All these results showed remarkable self-cleaning and anti-graffiti capabilities of the as-prepared UV-curable electrophoretic coating. Meanwhile, the coating displayed exceptional robustness in resisting chemical corrosion and mechanical damage. This newly developed UV-curable anti-smudge cathodic electrophoretic coating has great application potential in various metal protection industries.
研究领域:
材料科学
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涂层技术
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表面化学
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腐蚀工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）