Polyurethane/acrylic hybrid dispersions containing phosphorus reactive flame retardants as transparent coatings for wood

Puyadena, M.; Etxeberria, I.; Martin, Loli; Mugica, A.; Agirre, Amaia; Cobos, Mónica; González, Alba; Barrio, Alicia; Irusta, L.

doi:10.1016/j.porgcoat.2022.107005

Cited by 9 publications

(2 citation statements)

References 45 publications

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“…Similar to their counterparts based on petroleum-based resources, biobased PUs are highly flammable and emit toxic smoke during combustion, seriously harming fire safety and human health. Many approaches have been proposed to overcome this drawback, including (i) compounding flame-retardant fillers, , (ii) chemical modification with reactive flame-retardant-containing heteroatoms, − such as phosphorus, nitrogen, and silicon, and (iii) surface treatment with flame-retardant coatings. − Among them, the advantage of chemically modified reactive flame retardants is that they can be evenly and stably dispersed in the PU matrix, thus providing continuous flame retardancy and retainment of mechanical properties . Because of the abundance of reactive groups such as double bonds, aldehyde groups, and hydroxyl groups inherited from biomass resources, biobased chemicals are suitable for designing reactive flame retardants.…”

Section: Introductionmentioning

confidence: 99%

Atom-Economic Synthesis of Phosphorus-Containing Biobased Aromatic Diol for Flame-Retardant Robust Polyurethane

Ma,

Chen,

et al. 2024

ACS Appl. Polym. Mater.

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Flame-retardant polyurethanes (PUs) based on renewable raw materials are highly desired because they meet comprehensive requirements in sustainability and fire safety. In this work, considering the structural features of vanillin, a robust and rigid phosphorus-containing biobased diol, 6-(hydroxy(4-hydroxy-3-methoxyphenyl)methyl)dibenzo[c,e][1,2]oxaphosphinine 6oxide (VAN-DOPO), was successfully designed and prepared via an atom-economic reaction between vanillin (VAN) and 9,10dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). The VAN-DOPO monomer was then cured with an HDI trimer to obtain flame-retardant PU thermosets with an increased LOI value of 31.4% and flame-retardant grades reaching the V-0 level, with a phosphorus content of 2.46 wt %. Besides, changes in the glass-transition temperature, network structure, and toughening effect in tensile behaviors were observed as a consequence of the bulky VAN-DOPO moieties remarkably influencing the hydrogen bonds in PU thermosets. These results not only provide a facile strategy to prepare flame-retardant biobased PUs but also provide guidance to modulate their flame retardance and mechanical performance, thus further providing significant insights into the design and preparation of biobased synthetic polymers.

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Section: Introductionmentioning

confidence: 99%

Atom-Economic Synthesis of Phosphorus-Containing Biobased Aromatic Diol for Flame-Retardant Robust Polyurethane

Ma,

Chen,

et al. 2024

ACS Appl. Polym. Mater.

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“…Many natural bio-based materials, such as vanillin [ 15 ], adenosine [ 16 ], phytic acid [ 17 , 18 ], vegetable oils [ 19 ], and lignin [ 20 ], can be used as raw materials for flame retardant bases applied on the surfaces of wood and wood-based composites. Conventional film coatings that form the base materials for wood surfaces include epoxy resins [ 21 ], amino resins [ 22 ], polyurethane resins [ 23 ], and acrylic resins [ 24 ]. However, they are not considered environmentally friendly.…”

Section: Introductionmentioning

confidence: 99%

Research on Thermal Stability and Flammability of Wood Scob-Based Loose-Fill Thermal Insulation Impregnated with Multicomponent Suspensions

Augaitis,

Vaitkus,

Kairytė

et al. 2024

Materials

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Loose-fill thermal composite insulation produced from surface-modified wood scobs has been explored as a potential fire-resistant material for building envelopes. This work involves fire resistance behavior comparisons between four coating systems consisting of liquid glass, liquid glass-tung oil, liquid glass-expandable graphite, and liquid glass-tung oil-expandable graphite. The techniques of thermogravimetric and differential thermogravimetric analyses, gross heat combustion via a calorimetric bomb, cone calorimetry, SEM imaging of char residues, and energy dispersive spectrometry for elemental analysis, as well as propensity to undergo continuous smoldering, were implemented. The coating technique resulted in greater thermal stability at a higher temperature range (500–650 °C) of the resulting loose-fill thermal composite insulation, reduced flame-damaged area heights after the exposure of samples at 45° for 15 s and 30 s, with a maximum of 49% decreased gross heat combustion, reduced heat release and total smoke release rates, improved char residue layer formation during combustion and changed smoldering behavior due to the formation of homogeneous and dense carbon layers. The results showed that the highest positive impact was obtained using the liquid glass and liquid glass-expandable graphite system because of the ability of the liquid glass to cover the wood scob particle surface and form a stable and strong expanding carbon layer.

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Highly Transparent Fire-resistant Coatings with Intumescent Three-source Integration

Zeng,

Lan,

Wang

et al. 2024

Chin J Polym Sci

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Polyurethane/acrylic hybrid dispersions containing phosphorus reactive flame retardants as transparent coatings for wood

Cited by 9 publications

References 45 publications

Atom-Economic Synthesis of Phosphorus-Containing Biobased Aromatic Diol for Flame-Retardant Robust Polyurethane

Atom-Economic Synthesis of Phosphorus-Containing Biobased Aromatic Diol for Flame-Retardant Robust Polyurethane

Research on Thermal Stability and Flammability of Wood Scob-Based Loose-Fill Thermal Insulation Impregnated with Multicomponent Suspensions

Highly Transparent Fire-resistant Coatings with Intumescent Three-source Integration

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