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Water-based halogen-free steel structure ultra-thin expansion fireproof coating and preparation method thereof

A technology for fire-resistant coatings and steel structures, applied in fire-resistant coatings, coatings, etc., can solve problems such as the comprehensive performance is inferior to solvent-based fire-resistant coatings, the strength of the intumescent carbonized layer is not high, and the fire resistance limit time is short, so as to delay the thermal degradation process, Simple construction and low cost effect

Inactive Publication Date: 2010-06-23
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the high-quality fire retardant coatings on the market are all solvent-based. Although some progress has been made in the research of water-based fire retardant coatings, and some products have come out, their comprehensive performance is far inferior to that of solvent-based fire retardant coatings.
[0007] The polyacrylate emulsion widely used in the existing water-based fireproof coatings has a short fire resistance limit time, and the strength of the expanded carbonized layer is not high. Under the strong impact of the flame, the carbonized layer is easy to fall off, making the steel lose its protection.
Therefore, the key problem in the development of water-based fire retardant coatings is the lack of a base material emulsion with excellent performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A water-based halogen-free steel structure ultra-thin intumescent fireproof coating and a preparation method thereof, comprising the following steps:

[0049] First, according to formula 1 in Table 1, firstly stir water, fire protection additives (ammonium polyphosphate, melamine, pentaerythritol), fillers (titanium dioxide, kaolin and expandable graphite), and use a high-speed stirrer with a speed of 1000r / min to stir 20 minutes, and then grind for 10 minutes with a three-roller mill, then add the silicone acrylic emulsion and film-forming aids into the mixing tank, stir evenly and add it to the pre-stirred powder, and use a speed of 600r / min for high-speed stirring The instrument continued to stir and mix for 5 minutes and then discharged and loaded into barrels.

[0050] The performance of the fire retardant coating of the present invention obtained is shown in formula 1 of table 2.

Embodiment 2

[0052] A water-based halogen-free steel structure ultra-thin intumescent fireproof coating and a preparation method thereof, comprising the following steps:

[0053] According to formula 2 in Table 1, firstly stir water, fire protection additives (ammonium polyphosphate, melamine, pentaerythritol), fillers (titanium dioxide, kaolin and expandable graphite), and use a high-speed stirrer with a speed of 1000r / min to stir for 20 minutes , and then grind for 10 minutes with a three-roll mill, then add the silicone acrylic emulsion and film-forming aids into the mixing tank, stir evenly and add them to the pre-stirred powder, and use a high-speed mixer with a speed of 600r / min to continue Stir and mix for 5 minutes and then discharge into barrels.

[0054] The performance of the fire retardant coating of the present invention obtained is shown in formula 2 of table 2.

Embodiment 3

[0056] A water-based halogen-free steel structure ultra-thin intumescent fireproof coating and a preparation method thereof, comprising the following steps:

[0057] According to formula 3 in Table 1, firstly stir water, silicon acrylic emulsion, fire protection additives (ammonium polyphosphate, melamine, pentaerythritol), fillers (titanium dioxide, kaolin and expandable graphite) and film-forming additives evenly, and the use speed is 1000r / min high-speed agitator for 30 minutes, then grind for 10 minutes with a three-roller grinder, and then discharge into barrels.

[0058] The properties of the fire retardant coating of the present invention are shown in formula 3 of table 2.

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Abstract

The invention relates to a water-based halogen-free steel structure ultra-thin expansion fireproof coating and a preparation method thereof; the fireproof coating comprises components in the following content by weight percentage: 22 to 25 percent of acrylic latex, 33 to 40 percent of fire retarding agent, 5 to 9 percent of filler, 1 to 3 percent of film forming additive, and the balance water. Compared with the prior art, the invention adopts the acrylic latex as the film forming substance and adopts expandable graphite as the expansion reinforcing filler, so as to improve the expansion rate and the carbonized layer quality of the fireproof coating, so that the expansion carbonized layer can reach 25 times of the thickness of the traditional coating; when the coating thickness is 2mm, the fire resistance limit can reach 90min; and therefore, the invention has the advantages of higher fire resistance limit, good fireproof and waterproof performance, excellent brushing and spraying performance, simple and convenient construction, low cost, wide application, simple preparation process, environment friendliness and the like.

Description

technical field [0001] The invention relates to a fireproof paint, in particular to a water-based ultra-thin expansion fireproof paint for a halogen-free steel structure and a preparation method thereof. Background technique [0002] Steel structure has the advantages of high strength, good toughness, convenient construction, good ductility and earthquake resistance, etc. It has been widely used in super high-rise buildings, super long-span bridges, etc., but it also has a fatal weakness, that is, steel structure buildings The fire resistance is far worse than reinforced concrete structure or masonry structure. This is mainly due to the fact that steel is very easy to conduct heat, and it will quickly lose its rigidity under the action of high temperature, resulting in the collapse of buildings. According to a large number of disastrous steel structure fire cases and research results, the strength of steel is a function of temperature and decreases as the temperature rises....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/04C09D5/18
Inventor 王国建纪振鹏
Owner TONGJI UNIV
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