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Thermal properties of intumescent coating with waterborne melamine-acrylic emulsion resin for plywood

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Abstract

A mixture of etherified melamine–formaldehyde and acrylic emulsion resin was designed, with the hybrid resin improving the fire retardancy of indoor plywood as well as the CO and CO2 emissions. The water-based hybrid resin exhibited a single curing peak; the need for solvents was reduced. Compared with pure etherified melamine–formaldehyde resin, the hybrid resin had better flame retardancy and produced less pollution. Scanning electron microscopy and cone calorimetry were conducted, and the analyses revealed that lower binder resin concentrations resulted in improved flame retardancy and better char layer formation. When the binder resin concentrations were increased and CO/CO2 emissions were continued beyond 300 s, the flame retardancy of the intumescent coating was the same as that of the lower binding resin concentrations. Furthermore, the chemical structure and durability of the phosphocarbonaceous structure were verified through Fourier transform infrared spectroscopy and solid-state nuclear magnetic resonance analyses.

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Abbreviations

AC:

Acrylic emulsion resin

BR:

Binder resin

CS:

Carbonizing substance

FPS:

Foam producing substance

DA:

Dehydrating agent

FRMF :

Intumescent coating use etherified melamine formaldehyde resin as a binder resin

MF:

Etherified melamine formaldehyde

THR:

Total heat release

Time to PHRR:

Time to peak heat release rate

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Acknowledgments

Financial support (MOST 111-2313-B-150-001, 108-2811-E-002-542 and 108-2221-E-002-052) from Ministry of Science and Technology of Taiwan is acknowledged. The authors would like to thank Ms. Su-Yun Fang (Instrument Center, NTHU) for Bruker AVANCE III-400 MHz Solid NMR analysis.

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Authors and Affiliations

  1. Department of Agricultural Technology, National Formosa University, No. 64, Wunhua Rd, Huwei Township, Yunlin County, 632301, Taiwan ROC

    Chih-Shen Chuang

  2. Forest Utilization Division, Taiwan Forestry Research Institute, Taipei, 100, Taiwan ROC

    Po-Heng Lin

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Chuang, CS., Lin, PH. Thermal properties of intumescent coating with waterborne melamine-acrylic emulsion resin for plywood. J Coat Technol Res 20, 1193–1205 (2023). https://doi.org/10.1007/s11998-022-00736-5

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