A transparent intumescent flame retardant coatings was prepared by usingmelamine formaldehyde resin（MF）as binder，combined with phenyl phosphonic acid（PPOA）， neopentyl glycol（NPG） and N，N-dimethyl formamide（DMF） as the intumescent flame retardants（IFR）. Besides，the polyethylene glycol（PEG） was added to further enhance its properties.The limit oxygen index（LOI）， smoke density test and thermogravimetric analysis（TGA） were used to investigate the flame retardancy，smoke suppression and the thermostability of the coatings.The results showed that IFR could efficiently enhance the flameretardancy and smoke suppression in MF alone system.Addition of PEG could further improvethe flame retardancy and smoke suppression.When the additive amount of IFR and PEG were40% and 5% respectively，this coatings showed an optimal LOI of 27.4 and the smoke densityof 27.15. The morphology of char layer showed that the coatings with this addition ratiopresented a good char forming ability.
HAN Tiao
,
DONG Xiang
,
GENG Shi-Tiao
,
JIN Tie
,
KONG Po-Bei
,
NIE Shi-Bin
. Study on Flame Retardancy and Smoke Suppression of Transparent Intumescent Flame Retardant Coatings[J]. Paint & Coatings Industry, 2019
, 49(7)
: 16
-20
.
DOI: 10.12020/j.issn.0253-4312.2019.7.16
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