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Water thin type expanding steel structure fire-resisting paint and its preparation method

A fire-resistant coating, water-based technology, applied in the direction of fire-resistant coatings, coatings, etc., can solve the problem of not reaching the level of cement-based thick fire-resistant coatings, poor compatibility between film-forming substances and fire-resistant additives, and low expansion rate of coatings and other problems, to achieve the effects of improved flame retardancy, increased foaming rate, and simple preparation process

Inactive Publication Date: 2003-02-05
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this kind of steel structure fireproof coating has become the development direction of fireproof coating due to its thin coating and good performance, but because the fireproof additives used in this water-based thin intumescent fireproof coating are mainly organic compounds, its fire resistance temperature is not high
At the same time, the softening temperature of the film-forming material used in this kind of fire retardant coating is relatively low, and the foam layer is loose after burning, and it is easy to fall off under the flame erosion.
In addition, the compatibility between the film-forming substance and the fire protection additive is not good enough. The melting temperature of the film-forming substance is often not the foaming start temperature of the fire protection additive, so the expansion rate of the coating is low, generally only the thickness of the coating itself. 10 to 20 times of
Therefore, the fire resistance limit of the steel structure water-based thin-coated intumescent fireproof coating made of the above-mentioned ordinary propylbenzene emulsion, chlorine partial emulsion, and fireproof additive is only 30 minutes, which cannot reach the level of cement-based thick fireproof coating, thus limiting them. scope of application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of high melting temperature acrylate emulsions. Please refer to Table 1 for the formulation of the high melting temperature internal acrylate emulsion of the present invention and the existing common styrene-acrylic emulsion formulation. First, prepare according to the formula of high melting temperature acrylate emulsion 1 in Table 1. Weigh the monomers in component A, then weigh water and emulsifier according to the weight percentage of the total amount of monomers, mix and stir together to form pre-emulsion A. Weigh the water and initiator in component B according to the weight percentage of the total amount of monomers in Table 1, mix and dissolve to obtain solution B. Then, the water of component C is weighed according to the weight percentage of the total amount of monomers, and then added to the reactor, and the reactor is placed in a water bath to keep the temperature at 75°C, and about 1 / 5 of the pre-emulsion A and about 1 / 5 of the Solution B, sti...

Embodiment 2

[0046] High melting temperature acrylate emulsion 2 was prepared according to the formula in Table 1. The preparation method is the same as Embodiment 1. The resulting product had an initial melting temperature of 131°C.

Embodiment 3

[0048] Please refer to Table 2 for the 4 formulations of fire retardant coatings of the present invention and one of the existing comparative formulations. First, according to formula 1 in table 2, the high melting temperature acrylate emulsion 1 prepared by embodiment 1 weighed 36% by weight, and 15% of chlorine partial emulsion, 20% of ammonium polyphosphate, 7% of ammonium melamine, 13% of pentaerythritol, 4% of expanded graphite, 3% of zinc oxide and 2% of film-forming aids should be weighed. Then, first add the high melting temperature acrylate emulsion into the mixing tank, add the three kinds of fire prevention aids, zinc oxide and film-forming aids of the present invention under stirring, after stirring evenly, grind it in a sand mill, and then add expanded graphite , mixed evenly, and discharged into barrels. The properties of the resulting arson coating of the present invention are shown in Formulation 1 of Table 3. From the performance item of table 3 and compare ...

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Abstract

The present invention relates to a water thin expanding steel structure fire-resisting coating material and its preparation method. Said ivnention adopts a self-synthesized high melting temp. acrylate emulsion as main film-forming substance, adding proper quantity of chlorometaemulsion to raise fibre resistance of film-forming substance self-body, and on the basis of convertional ammonium polyphosphate fire-resistant adjuvant an expandable graphite as foaming material is added so as to form the invented fire-resisting coating material. Said invention can greatly raise forming rate to coating layer, the thickness of foamed layer can be up to 30-50 times that of original coating layer, and its fire-resisting limit can be up to 75 min (thickness of coating layer is 3 mm).

Description

technical field [0001] The invention relates to a steel structure fireproof coating. The present invention further relates to a preparation method of the fireproof coating for steel structures. Background technique [0002] There are many types of fire-resistant coatings for steel structures, which can be divided into three types: water-based, solvent-based and powder-based according to their material forms; thick, thin and ultra-thin according to the coating thickness; The mechanism can be divided into three types: thermal insulation type, expansion type and non-expansion type. At present, the commonly used fireproof coatings for steel structures are mainly classified into three types: thick type, thin type and ultra-thin type: [0003] Thick steel structure fireproof coating: the coating thickness is between 8-50mm, and the fire resistance limit is 0.5-3h. It is a heat-insulating fireproof coating. Rock, etc.) and flame retardants. Although this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/18C09D133/06
Inventor 王国建许乾慰何森
Owner TONGJI UNIV
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