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Amino Resin
The Experts below are selected from a list of 5808 Experts worldwide ranked by ideXlab platform
Long Yan – One of the best experts on this subject based on the ideXlab platform.
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synthesis and application of novel magnesium phosphate ester flame retardants for transparent intumescent fire retardant coatings applied on wood substrates
Progress in Organic Coatings, 2019Co-Authors: Long Yan, Dingli LiuAbstract:Abstract A series of magnesium phosphate ester (MPEA) flame retardants were synthesized by the salification of cyclic phosphate ester (PEA) with different contents of magnesium hydroxide (MH). The obtained PEA and MPEAs were well characterized and then thoroughly mixed with Amino Resin to produce transparent intumescent fire-retardant coatings applied on wood substrates. The optical transparency, flame retardancy and smoke suppression properties of the coatings were intensively investigated. The results show that the fire-retardant coatings containing MPEAs can keep a high degree of transparency even at high MH contents, and the fire protection performance, flame retardancy and smoke suppression properties of the coatings are significantly improved with introduction of MH due to the formation of a more compact, continuous and intumescent char during combustion. When the mass ratio of PEA/MH is 95:5, the obtained MPEA3 flame retardant exhibits the best synergistic flame-retardant and smoke suppression effects in the coatings. Remarkably, the flame spread rating, total heat release and total smoke release for the coating containing MPEA3 are 34.4%, 29.0% and 55.0% lower, respectively, than those of the coating containing PEA. TG analysis shows that the introduction of MH improves the thermal stability and residual weight of the coatings, and the coating containing MPEA3 shows the maximum residual weight of 34.4% at 800 °C. Char residue analysis shows that the introduction of MH positively contributes to enhance the quality and quantity of intumescent char via the formation of more phosphorus-rich crosslinking structures and aromatic structures in the condensed phase, and an excessive content of MH diminishes this positive char-forming effect as well as the synergistic flame-retardant and smoke suppression effects in the coatings.
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Enhancing the flame-retardant and smoke suppression properties of transparent intumescent fire-retardant coatings by introducing boric acid as synergistic agent
Journal of Thermal Analysis and Calorimetry, 2018Co-Authors: Zhisheng Xu, Zhiyong Chu, Long YanAbstract:A series of novel phosphorus-boron flame retardants (BPEAs) were successfully synthesized by introducing boric acid (BA) into cyclic phosphate ester acid (PEA) via the esterification and thoroughly characterized by 1H nuclear magnetic resonance spectroscopy and Fourier transform infrared (FTIR) spectroscopy. Five kinds of transparent fire-retardant coatings applied to wood substrates were produced by thoroughly mixing Amino Resin with PEA and BPEAs. The effects of BA on the optical transparency, thermal stability, fire performance and smoke emission characteristics of the coatings were investigated by various analytical instruments. The transparency analysis reveals that the transparency value of the coatings gradually decreases with increasing BA loading, and MPEA4 with the highest BA content still exhibits a high degree of transparency. The results from fire protection, cone calorimeter and smoke density tests show that the introduction of BA greatly decreases the flame spread rating, mass loss, char index, heat release rate, smoke production rate, total heat release, total smoke release and specific optical density of the coatings concomitant with the increase in the residual mass and intumescent factor, which is ascribed to the formation of a more dense and continuous intumescent char judging by digital photographs and scanning electron microscope images. Thermo-gravimetric analysis indicates that the onset decomposition temperature, high-temperature stability and residual mass of the coatings greatly improve with increasing BA content. FTIR analysis shows that the introduction of BA into the coatings contributes to generate more phosphorus-rich cross-linked structures and aromatic structures and then create a compact and intumescent char layer, thereby effectively enhancing the flame retardancy and smoke suppression properties of the coatings.
Dingli Liu – One of the best experts on this subject based on the ideXlab platform.
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synthesis and application of novel magnesium phosphate ester flame retardants for transparent intumescent fire retardant coatings applied on wood substrates
Progress in Organic Coatings, 2019Co-Authors: Long Yan, Dingli LiuAbstract:Abstract A series of magnesium phosphate ester (MPEA) flame retardants were synthesized by the salification of cyclic phosphate ester (PEA) with different contents of magnesium hydroxide (MH). The obtained PEA and MPEAs were well characterized and then thoroughly mixed with Amino Resin to produce transparent intumescent fire-retardant coatings applied on wood substrates. The optical transparency, flame retardancy and smoke suppression properties of the coatings were intensively investigated. The results show that the fire-retardant coatings containing MPEAs can keep a high degree of transparency even at high MH contents, and the fire protection performance, flame retardancy and smoke suppression properties of the coatings are significantly improved with introduction of MH due to the formation of a more compact, continuous and intumescent char during combustion. When the mass ratio of PEA/MH is 95:5, the obtained MPEA3 flame retardant exhibits the best synergistic flame-retardant and smoke suppression effects in the coatings. Remarkably, the flame spread rating, total heat release and total smoke release for the coating containing MPEA3 are 34.4%, 29.0% and 55.0% lower, respectively, than those of the coating containing PEA. TG analysis shows that the introduction of MH improves the thermal stability and residual weight of the coatings, and the coating containing MPEA3 shows the maximum residual weight of 34.4% at 800 °C. Char residue analysis shows that the introduction of MH positively contributes to enhance the quality and quantity of intumescent char via the formation of more phosphorus-rich crosslinking structures and aromatic structures in the condensed phase, and an excessive content of MH diminishes this positive char-forming effect as well as the synergistic flame-retardant and smoke suppression effects in the coatings.
Guojian Wang – One of the best experts on this subject based on the ideXlab platform.
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the novel epoxy pepa phosphate flame retardants synthesis characterization and application in transparent intumescent fire resistant coatings
Progress in Organic Coatings, 2016Co-Authors: Yanchao Shi, Guojian WangAbstract:Abstract A series of novel epoxy/PEPA phosphate (EPP) flame retardants were synthesized by 1-oxo-4-hydroxymethyl-2,6,7-trioxa-l-phosphabicyclo[2.2.2]octane (PEPA), polyphosphoric acid (PPA), and epoxies of bisphenol A epoxy Resin E51 (EP) and 1,4-butanediol diglycidyl ether (BDE) with different proportions. The structure of EPP was characterized by 1 H nuclear magnetic resonance ( 1 H NMR) and Fourier transform infrared spectroscopy (FTIR). Then EPPs as flame retardants were blended with Amino Resin to prepare the transparent intumescent fire resistant coatings. The fire protection test showed that the best fire protection was obtained when the ratio of EP/BDE was 1/2. The char layers of coatings were investigated by intumescence ratio and scanning electron microscopy (SEM). The intumescence ratio result illustrated that the intumescence ratio of char layers decreased with the increase of EP/BDE ratio. The SEM images demonstrated that incorporation of EP could significantly improve the foam structure of char layers when the ratio of EP/BDE was no more than 1/2. Next, the thermal decomposition behaviors of the coatings were studied by thermogravimetric analysis (TGA) under nitrogen and air. The results demonstrated that incorporation of EP could enhance the thermal stability and residual weight of fire resistant coating as well as the thermo-oxidation resistance of the char layers. Finally, the real-time FTIR proved that the decomposition process of fire resistant coatings included three stages bellow 550 °C, which was consistent with the result in TGA.
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synthesis of a novel phosphorus containing polymer and its application in Amino intumescent fire resistant coating
Progress in Organic Coatings, 2013Co-Authors: Guojian Wang, Yan Huang, Xiang HuAbstract:A mixture (denoted as PX) of phosphates was prepared by the reaction of phosphoric acid and a kind of bicyclic pentaerythritol phosphate (PEPA, 1-oxo-1-phospha-2,6,7-trioxabicyclo[2.2.2]-4-hydroxymethyl octane). Then PX was successfully copolymerized with PEG200 to achieve a novel phosphorus-containing polymer (denoted as PX-co-PEG). 31P NMR, 1H NMR and FT-IR analysis results showed that there were 38.7 wt.% PEPA phosphates and 61.3 wt.% pentaerythritol biphosphates in the PX mixture. The result of GPC indicated that the molecular formula of PX-co-PEG could be noted as PX2.0PEG3.0. Fire protection test results proved that PX-co-PEG modified Amino Resin applied on the plywood boards effectively extended the protection time over flame. The decomposition process of fire resistant coating was studied by thermogravimetric analysis and FT-IR which could be divided into three characteristic temperature stages. The solid residue was kept to be 14.6 wt.% at 787 °C.