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A water-based intumescent polyurethane/acrylic fireproof coating with open-cell perlite
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An open-pore perlite and fire-retardant coating technology, which can be used in polyurea/polyurethane coatings, fire-retardant coatings, coatings, etc., and can solve unseen problems.
Inactive Publication Date: 2016-04-20
HUNAN UNIV OF TECH
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At present, there are no reports and studies in this area in China.
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Embodiment 1
[0018] Use 7.5 grams of TA-3303 acetic acrylic emulsion, 2.5 grams of TC-206 polyurethane-acrylate, 17.5 grams of ammonium polyphosphate, 6.9 grams of dicyandiamide, 6.9 grams of diammonium hydrogen phosphate, 17.3 grams of white sugar, without opening the perlite, A total of 1 gram of dispersant and defoamer. After mixing and grinding, apply on a 4 mm thick wooden board. After being exposed to fire, the coating film expands rapidly, and after burning for 15 minutes, the expansion rate slows down. At 40 minutes, there was a slight "sag flow" phenomenon, and at 47 minutes, the edge began to fall off the plate. The backfire temperature is 76 degrees. The foaming of the expanded charcoal layer is relatively uniform, and the overall strength of the expanded charcoal layer after combustion is 175g / cm 2 , the expansion ratio is 43 times. There are a few cracks visible to the naked eye on the surface of the charcoal layer.
Embodiment 2
[0020] Use 7.5 grams of TA-3303 acetic acrylic emulsion, 2.5 grams of TC-206 polyurethane-acrylate, 17.5 grams of ammonium polyphosphate, 6.9 grams of dicyandiamide, 6.9 grams of diammonium hydrogen phosphate, 17.3 grams of sugar, 0.8 grams of open-pore perlite, A total of 1 gram of dispersant and defoamer. After mixing and grinding, apply on a 4 mm thick wooden board. After being exposed to fire, the coating film expands more uniformly. At 52 minutes, there was a slight "sag flow" phenomenon, and there was a slight detachment, and the backfire temperature was 64 degrees. The foaming of the expanded charcoal layer is relatively uniform, and the overall strength of the expanded charcoal layer after combustion is 177g / cm 2 , the expansion ratio is 38 times. There are no visible cracks on the surface of the charcoal layer.
Embodiment 3
[0022] Use 7.5 grams of TA-3303 acetic acrylic emulsion, 2.5 grams of TC-206 polyurethane-acrylate, 17.5 grams of ammonium polyphosphate, 6.9 grams of dicyandiamide, 6.9 grams of diammonium hydrogen phosphate, 17.3 grams of sugar, 1.6 grams of open-pore perlite, A total of 1 gram of dispersant and defoamer. After mixing and grinding, apply on a 4 mm thick wooden board. After being exposed to fire, the coating film expands more uniformly. There is no "sag flow" phenomenon, and the board does not fall off. The backfire temperature is 57 degrees. The foaming of the expanded charcoal layer is relatively uniform, and the overall strength of the expanded charcoal layer after combustion is 248g / cm 2 , the expansion ratio is 39 times. There are no visible cracks on the surface of the charcoal layer.
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Abstract
In the invention, porous perlite used as a flame-retardant aid is added to an aqueous expansion-type fireproof coating for the first time, belonging to the technical field of fireproof coatings. The aqueous expansion-type fireproof coating is prepared by sufficiently grinding a film-forming material formed by compounding thermosetting polyurethane-acrylate emulsion and thermoplastic vinyl acetate-acrylate emulsion, ammonium polyphosphate used as an acid source, white sugar used as a carbon source, dicyandiamide and diammonium hydrogen phosphate used as gas sources and the porous perlite used as a flame-retardant aid. The results show that: the porous expanded perlite has a good assistance effect on the fire resistance of the fireproof coating; when the adding amount of the porous perlite is 2.6wt% and a wood board is burnt for 60 minutes, the fire back temperature of the wood board is only 57 DEG C and the expanded char layer of the coating has no generation of vertical flow and separation from the board; because of the addition of perlite, the foams in the expanded char layer are uniform and compact and have smaller size, thus improving fireproof and heat insulation effects and improving the mechanical properties; and the perlite can improve the performance of the expanded carbon layers.
Description
technical field [0001] The invention relates to a formula of an expansive water-based fireproof coating, which mainly improves the fireproof performance of the fireproof coating to a certain extent after adding open-pore perlite, and belongs to the technical field of expansion type fireproof coatings. technical background [0002] With the rapid development of my country's cities, high-rise and super high-rise buildings have grown rapidly, and the use of wood veneer materials for decoration has also increased rapidly. The fire protection of these flammable materials has attracted widespread attention. Intumescent fire retardant coatings are currently the mainstream of fire retardant coatings due to their thin coating thickness and good fire and heat insulation effects. Its mechanism of action is mainly that under flame or high temperature, the acid source, carbon source and gas source of the system undergo a violent chemical reaction, which expands the melt of the film-formi...
Claims
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Application Information
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